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8/16/2019 acceso Ethernet para metro de Proxima Generacion y Redes de Area Amplia.pdf
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© 2008 Cisco Syste ms, Inc. All rights reserv ed. Cisco ConfidentialPresentation_ID 2
BRKRST-3042Ethernet Access for N ext-G ene ration M etro and W ide -Area
N etw orks
Em erson M oura –em oura@ cisco.com
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Recuerde siempre…
1. Apagar su teléfono celular mientras dure la sesión.
2. Completar su evaluación y entregarla a la asistente de sala.
3. Ser puntual en todas las actividades de entrenamiento,almuerzos y eventos sociales para lograr un desarrollo óptimode la agenda.
4. Completar la evaluación general incluida en su material y
entregarla el miércoles 12 de Noviembre durante la tarde.
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Agenda
1. Metro Ethernet Services Overview
2. Design and Deployment Considerations
3. Customer Premises Equipment (CPE) Selection
4. Case Study
5. QoS CPE Configuration Examples
6. Summary
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Agenda
1. Metro Ethernet Services Overview
Goals and Definitions
Deployments and Service Types
2. Design and Deployment Considerations
3. Customer Premises Equipment (CPE) Selection
4. Case Study
5. QoS CPE Configuration Examples
6. Summary
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Design Goals
1. Leverage Ethernet technology to reduce costs
2. Increase bandwidth in the WAN
3. Leverage existing designs and deployments
Minimize reengineering for main and remote sites
Protect current network investment
Increase scalability with full QoS and functional support
4. Application support
Support new applications effectively (Cisco TelePresence)
Consolidate existing applications (storage and serverconsolidation)
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NG WAN Deployment Scenarios
Next-Generation WAN/MAN
Potential for 1000+ Locationsat T1 Rates—Migration of
Existing Frame Relay Branchto Ethernet Access to MPLS
or Ethernet Across MPLS Number of Sites Limited to< 100 Metropolitan Areas
However, Downstreamfrom 10M–100 Mbps
SJC
DEN
DFW
ORD
RDU
NYC
YOW
ATL̀
MPLS VPNEthernet over MPLSEthernet access to
MPLS
InternetLeased Line
Ethernet Handoff
Broadband
MetroEthernet
Potential for 5000+ Teleworker TeleAgent Deployments 3M–6M bps
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Metro Ethernet Service Types
1. E-Line service usedto create:
Ethernet Private Line
Ethernet Virtual Private Line (EVPL)
Ethernet Internet access
Ethernet MPLS VPN access
2. E-LAN service usedto create:
Ethernet Private LAN(EP-LAN)
Multipoint L2 VPN (EVP-LAN)
Multicast network
CE
CE
Point-to-PointEVC
MENUNI
UNI
E-Line Service Type
CE
CE
CE
MEN
CE
Multipoint-to-MultipointEVC
UNI
UNI
UNI
UNI
E-LAN Service Type
From Metro Ethernet Forum public presentation:
http://metroethernetforum.org/pdfs/standards/overview_of_mef_6_and_10.ppt
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Ethernet Services Model and Definitions
Customer
Edge
(CE)
User Network
Interface
(UNI)
User Network
Interface
(UNI)
Customer
Edge
(CE)
Service
Attributes
A Service Is What the CE Sees (UNI-to-UNI).The Technology Used Inside the Metro Ethernet Network Is Not Visible.
Metro EthernetNetwork (MEN)
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Ethernet Virtual Connection (EVC)
1. Association of two or more UNIs
2. Frames can only be exchanged among the associated UNIs
3. A frame sent into the SP network via a particular UNI must notbe delivered out of the SP network via that UNI
Metro Ethernet Network
Customer
Edge
(CE)
User Network
Interface
(UNI)
User Network
Interface
(UNI)
Customer
Edge
(CE)
EVC
In a Point-to-Point EVC, Exactly Two UNIs Are Associated
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Multipoint-to-Multipoint EVC
1. Two* or more UNIs are associated
2. A flooded, broadcast or multicast ingress frame is typicallyreplicated and delivered to all of the other UNIs
3. Can be used as a routing domain/area 0, but should it be?
Metro Ethernet Network
Customer
Edge
(CE)
User Network
Interface
(UNI)User Network
Interface
(UNI)
Customer
Edge
(CE)
EVC EVC
EVC
*A MP2MP EVC with two UNIs is different than a P2P EVC since additionalUNIs can be added at any time
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Service Attributes:
Service Multiplexing
1. Similar to Frame Relay/ATM hub location with multipleDLCIs/PVCs
2. Multiple EVCs at a UNI (EVC=VLAN)
3. Efficient use of CE port
Metro Ethernet Network
Service Multiplexing
EVC1EVC2
EVC3
Hub
Spoke
Spoke
Spoke
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Service Attributes:
Bandwidth Profile
1. CIR: Committed Information Rate
2. PIR: Peak Information Rate
1. MBS: Maximum Burst Size(Bc, Be)
Bc: Committed Burst
Be: Excess Burst
2. Tc: Time interval over whichMBS is transmitted
Customer Edge(CE) User Network
Interface (UNI)
Contract Enforced Here
Metro Ethernet Network
EVC
Customer Edge(CE)
User NetworkInterface (UNI)
Contract Enforced Here
C I R
P I R MBS
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Service:
Ethernet Private LAN (EP-LAN)
1. Multipoint service where all devices are direct peers
2. No service multiplexing, VLANs presented to all sites (“all-to-one”bundling)
3. Transparent to customer BPDUs
4. Has been called E-LAN and transparent LAN service
5. Routers and switches can safely connect
6. Often implemented via switched Ethernet or Ethernet over Wave DivisionMultiplexing (WDM), SONET, etc. (ITU-T G.709, ITU-T G.7040)
PECPE SP MetroNetwork
PE
CPE
Pseudowires
Nonservice
Multiplexed UNI
802.1Q Tunneling
All to One Bundling
PE
CPE
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Service:
Ethernet Virtual Private Line (EVPL)
1. Defines a VLAN-based, point-to-point service(analogous to Frame Relay using VLAN tags as VC IDs)
2. A Layer 3 service: normally supports a router as CPE edge device
3. Service multiplexed UNI (e.g., 802.1Q trunk)
4. Opaque to customer PDUs (e.g., BPDUs)
5. Often implemented via switched Ethernet (Metro) or MPLS
CPEPE
802.1Q Trunk
Pseudowires
Service
Multiplexed UNI
VLANs
SP PacketNetwork
PE
PE
CPE
CPE
CPE
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Metro Ethernet for the Enterprise WAN
Comparison of Some Services
*May be inefficient depending on implementation
**Scale considerations, requires per destination traffic classes and hierarchical QoS
***Each location has a per class SLA for its access into the MPLS network
LANExtension
DynamicMeshing
IPMulticast
PerDestination
QoS
PerDestination
SLA
CiscoTelePresence Applicable
CommonMethods
to Classify
CommonReach
EP-LAN
EVPL(Ethernet Virtual
Private Line)
Yes YesYes,
Limited*No No 802.1P
Metro Area
Yes,Limited**
No No Yes Yes YesDSCP or
802.1P
Metro
Area
Yes
EPL(Pt-Pt EthernetSONET/WDM)
EP-LAN(Multipt EthernetSONET/WDM)
Yes,Limited
No Yes Yes Yes 802.1P NationalYes
Yes YesYes,
Limited*No No 802.1P National
Yes,Limited**
VPLS(Virtual PrivateLAN Service)
EVPL as Access toMPLS VPN (orEthernet to Internet)
Yes YesYes,
Limited*No No
DSCP or802.1P
WorldwideYes,
Limited**
No Yes Yes Yes*** YesDSCP or802.1P
WorldwideYes,
Limited**
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Agenda
1. Metro Ethernet Services Overview
2. Design and Deployment Considerations
Deployment Examples
Scalability
Quality of Service (QoS)
3. Customer Premises Equipment (CPE) Selection
4. Case Study
5. QoS CPE Configuration Examples6. Summary
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Enterprise, Small-Medium Business:
EP-LAN Regional Access, Full Mesh
1. Scenarios
Usually available in a Metro area
Full mesh or partial mesh
Can be used to extend LAN or
use as an L3 broadcast WAN
2. Characteristics
Passes 802.1Q trunks acrossSP network (called Q-in-Q)
Enterprise routing control
Any-to-any connectivity withinthe Metro area allows flexibility
May be implemented viaSONET/DWDM resilient packetring or switched Ethernet
Hub 2Branch 1
Branch 2
E-LAN
Hub 1
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Hub 2Branch 1
Hub 1
E-LAN
EP-LAN with QoS:
IP Multiservice Solution
1. QoS characteristics
Any-to-any connectivity with QoSwithin the Metro area
No per destination SLA; QoS ispoint-to-cloud from SP
SLA bandwidth can be shared:voice, video, and data apps
Enterprise responsibility to ensurethat no site is “overrun”
Combination of network andapplication-based control (CAC)maps to provisioned “SLA”
Service level may be a target
2. Configuration samples inQoS CPE config examplessection
1000m Link/2m Real Time20m Priority
100m Link/2m Real Time5m Priority
100m Link/2m Real Time10m Priority
1000m Link/
20m Real Time100m Priority
Branch 2
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Enterprise, Small-Medium Business:
EVPL Regional Access, Hub-Spoke
1. Scenarios
Point-to-point—Hub and spoke
Branch and Internet connectivity
2. Characteristics
Enterprise routing control
Supported as Layer 3 WAN
EVC/VLAN seen as subinterface
VLAN IDs supplied by SP, up to4094; doesn’t pass 802.1Q
Scalable for large hub/spoke
Built via switched network orSONET/DWDM point-point Metro
Branch 1
Metro HQ
Multiple EVCs at UNI
MetroBranch 2
MetroBranch 3
E-Line
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MetroBranch 1
Metro HQ
MetroBranch 2
MetroBranch 3
E-Line
EVPL with QoS:
IP Multiservice Solution
1. QoS Characteristics
Per destination QoS and SLA
PVC-like SLA: CIR/PIR/burst, loss,similar to ATM, but SLA can be pertraffic class
HQ CPE to support per VLAN QoSfor many subinterfaces
May support untagged interface
Use 802.1Q trunk interface forremotes, even if only one EVC;config and PD ease
2. Configuration samples inQoS CPE config examplessection
1000m Link/10m Real Time
20m Priority
100m Link/5m Real Time
20m Priority
100m Link/2m Real Time30m Priority
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Enterprise EVPL:
Access to MPLS VPN or Internet
1. E-line used as access
2. Routing provided by SPEnterprise peers with PE
3. Provides MPLS accesssimilar to private line, FrameRelay DLCI, or ATM PVC
4. Direct access to all othersites in VPN with one EVC
5. Depending on SP, SLAsmay be aligned (E-Line and
MPLS), or may beseparate/different
Purchase matching SLAs
E V P
L
E V P L
UserNetworkInterface(UNI)
CE
UNI
(CE)Customer Edge
(PE)Provider Edge
(P)Provider
(PE)Provider Edge
S e r v i c e P r o v i d e r
M P L S V P N
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P
P PE CPE
CPE
SiSi
CE
Campus
Gig EthernetFast Ethernet
Branch
Service Provider
Attachment Circuit Attachment Circuit
PE
Virtual Private LAN Service (VPLS)
Layer 2 Access over MPLS
1. Also called Pseudowire over MPLS, Ethernet over MPLS
2. Layer 2 point-to-point service
Customer need not hand off routing to service provider
3. Layer 2 multipoint service
Customer controls edge IP routing, core appears as a broadcast network,also called Virtual Private LAN Service (VPLS)
Ethernet
over MPLS(EoMPLS)
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Ethernet over MPLS Comparison:
Layer 2 or Layer 3 VPN Services?
1. Enterprise network managers cautious about Layer 3services
2. With Layer 3 services, there is a dependency on the SP’srouting protocol for convergence following a path failure
Using Cisco Performance Routing (PfR) is one means to address
3. With Layer 2 services (pseudowire/Ethernet over MPLS)the enterprise controls both ends of the circuit at Layer 3
4. Analogous to Frame Relay or ATM in that:
Enterprise routing protocol (IGP)controls path determination
QoS can be applied withoutremapping to SP’s policies
Service may not be DSCP-aware
P
P PE
PEEthernet
over MPLS(EoMPLS)
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Teleworker, Teleagent, Small Business:
EVPL Access to IPSec VPN or Internet
1. Broadband fiber to the premises can hand off Ethernet
2. Bandwidth is often asymmetrical
= 30 Mbps upstream = 50 Mbps downstream
3. Allows multiple IP voice and video channels
4. Benefits from CPE with high throughput when services(encryption, firewall, intrusion detection, QoS) are enabled
IPSec Router
Cisco 871
IPSec Headends
BGP AS 109
Firewall
Campus
Tier 2
ISP
Tier 3 ISP
Broadband
ServiceProvider
DS3
ISP
Small Office/Home Office
Campus/HQ
Tier 1
ISPs
Gigabit
Ethernet
EPL, EVPL
“Internet”
Sites
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Class of Service Marking Methods
1. Multiple options to classify and mark for Metro Ethernet
Ask your SP how they classify, and mark accordingly
2. Classification can depend on:
Service type (e.g., E-LAN, E-Line)Service subtype (e.g., EVPL, EPL, EoMPLS)
For E-Line, if UNI is tagged or untagged
3. Classification can be based on:
EVC (VLAN ID), CoS (802.1P bits), ToS (IP DSCP bits)
Data
7 6 5 4 3 2 1 0
ID Offset TTLLen
Version
Length
ToS
Byte
DiffServ Code Point (DSCP) IP ECN
IP Precedence Unused802.1P C F I
VLAN ID
802.1QTAGCoS
SMACDMAC
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Traffic Shaping: Mapping to SP SLAs
1. CPE shaping and SP policing may not count the sameoverhead bytes
May cause SP to police packets even with CPE shaping to the SLA
CPE may shape based only on Layer 3 bytes, or include Layer 2
overhead such as address/type fields (14B), 802.1Q (2B)
Some CPE has options for accounting for Layer 2
SP may count Layer 2 overhead as above or may also count framecheck sequence, FCS, start frame delimiter (SFD) preamble andinterframe gap
2. Test and tune shaping to SLA before going to production
Destination Address
Source Address
Type/Length
Data(e.g., IP Packet)
Pad FCSPreambleSFD
Inter-FrameGap
0x8100 VLANTag
7 1 6 6 2 2 2 0–1500 0–46 4N x 12
Ethernet Frame: 68 to 1522 Bytes
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Metro Ethernet Service: Summary Guide
1. Choose an E-LAN service
With a real-time SLA if voice is the focus and cost is prioritized over SLAs
Where any-to-any communication is the focus
2. Choose an E-Line service
When prioritization of real-time and priority data are needed
Where specific bandwidth between sites (per circuit) is needed
3. Use IP routing protocols across both E-LAN and E-Line
Reduce typical broadcast-related issues, leverage Layer 3 controls/features
Service Selection and Design
E-LineE-LAN
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Metro Ethernet QoS: Summary Guide
1. Leverage the sample QoS configurations as a starting point,based on Metro Ethernet service and scenario
In “QoS CPE Configuration Examples” section
2. Match CPE QoS definitions to the Metro Ethernet contract
Mark traffic so it is appropriately classified by Metro Ethernet edge
CPE traffic shaping and call admission control avoid key traffic drops
3. Verify CPE shaping and SP policing count the same overhead
E-LineE-LAN
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Agenda
1. Metro Ethernet Services Overview
2. Design and Deployment Considerations
3. Customer Premises Equipment (CPE) Selection
Single Tier: Integrated Device
Multi-Tier: Specialized Devices
4. Case Study
5. QoS CPE Configuration Examples
6. Summary
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CPE, Which to Choose:
Single Tier
1. Single tier: switch
Layer 2/3 forwarding withreduced cost
Line rate performance
(QoS and routing)
2. Single tier: router
Layer 3 and advanced IP forwarding
Performance up to SLA
Advanced features(e.g., security, voice, PfR)
3. Single tier: security appliance
Firewall, IPS, VPN, basic QoS,IP routing
Ex: All SP-Managed
or All Self-Managed
Single-Tier
Demarc
Ex: All SP-Managed
or All Self-Managed
Single-Tier
Demarc
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CPE, Which to Choose:
Multi-Tier
1. Multi-Tier: switch + router
Demarcation (managed WAN)
Line rate performance +advanced features
Front-end existing CPE
2. Multi-Tier: securityappliance + switch
Demarcation (managedsecurity)
Upgrade existing CPE with
advanced security
Enhance QoS and routing withrobust security
Ex: SP-Managed
for WAN Access
Ex: SP-Managed
for Security
Multi-Tier
Demarc
Ex: SP-Managed
for WAN Access
Ex: SP-Managed
for Security
Multi-Tier
Demarc
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Multi-Tier CPE Deployment1. Considerations
Provides demarcation for service provider management
Price/performance via hardware implemented QoS
Enterprise retains IP routing control (first tier can be L2 or L3)
High availability design considerations
Separate chassis to purchase/install/manage
QoS postcrypto increases antireplay drop likelihood
Demarc
IngressMarking
Metro Ethernet
EgressMark,Shape
Prioritization,Remarking,
WRED
Police/RemarkRT/Priority Traffic
Above SLA
Best EffortTraffic MayBe Dropped
Firewall, IPS,VPN, NBAR,Voice, NATEIGRP, PfR
DSL, Cable,3G Wireless,ISDN Backup
Backup,HSRP
Application-LevelCall Admission
Control for Real-Time Traffic
Demarc
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Single Tier Platform Scalability
Bandwidth
N u m b e r o f P e e r s
5000
256K/1.4M 10 Gbps
Enterprise MAN/WAN and Crypto AggregationCisco 7600 Series
2
Midrange RoutingCisco 7200 VXR NPE-G2
Access/EdgeRouting
Cisco 800, 1800,2800, 3800
ASR 1000 Series
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Small/Medium Branch
For more recent capabilities, please see www.cisco.com/go/srnd for the document titled
“Ethernet Access for Next-Generation Metro and Wide-Area Networks”
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Cisco Catalyst 3750
Metro Ethernet Switch
Two SFP EnhancedServices GE Ports
*
*CPU busy not a reliable indicator of system capacity
For advanced security, voice, NBAR, NAT, GRE, use in a multitier deployment
www.cisco.com/en/US/products/hw/switches/ps5532/products_
installation_and_configuration_guides.list.html
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Agenda
1. Metro Ethernet Services Overview
2. Design and Deployment Considerations
3. Customer Premises Equipment (CPE) Selection
4. Case Study
Small/Medium Branch
Large Branch
Campus Headend
5. QoS CPE Configuration Examples
6. Summary
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Case Study:Small/MediumCurrent Network
1. Large commercial bank
2. Locations 4000–6000
3. Cash machines at DS0 Frame Relay with dual PVC
4. Branch offices on dual T1s
Frame Relay
P VCBranch
CampusUnusedFast/Gig Ethernet
Existing ISR
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Case Study—Small/MediumPost Deployment
1. Metro Ethernet EVPL (crypto optional)
2. EoMPLS (crypto optional)
3. Internet access (crypto required)
E t h e r n e t V i r t u a l C i r c u i t s
Frame Relay
P VCBranch
Campus
Crypto On-Board
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Design Guide: Test Topology andConfiguration for QoS Policy
Per Class Shaper for Data
Cisco 2851
c2800nm-adventerprisek9-mz.124-9.T2
Branch
!
interface GigabitEthernet0/0.2200description Primary WAN
encapsulation dot1Q 2200
ip address 192.168.0.2 255.255.255.252
service-policy output PER_CLASS_10mb
!
interface GigabitEthernet0/0.3300
description Secondary WAN
encapsulation dot1Q 3300
ip address 192.168.0.146 255.255.255.252
service-policy output PER_CLASS_10mb
!
! policy-map PER_CLASS_10mbclass REAL_TIME police 3584000 conform-action transmit
exceed-action transmitviolate-action transmit
set cos 5class GOLDshape average 1536000set cos 3
class SILVER shape average 2560000set cos 2
class class-defaultshape average 2560000set cos 0
!
GigabitEthernet 0/0
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Design Guide:DMVPN Dual Hub/Dual Cloud
!interface Tunnel1description Tunnel1
bandwidth 5120ip address 10.56.5.0 255.255.252.0ip hold-time eigrp 1 35ip nhrp authentication testip nhrp map 10.56.4.1 192.168.31.254ip nhrp map multicast 192.168.31.254ip nhrp network-id 105640ip nhrp holdtime 600ip nhrp nhs 10.56.4.1ip nhrp cache non-authoritativeip route-cache flowip summary-address eigrp 1 10.192.0.0 255.255.255.0 5load-interval 30tunnel source 192.168.0.146tunnel destination 192.168.31.254tunnel key 105640tunnel protection ipsec profile vpn-dmvpn!
interface Tunnel0description Tunnel0 bandwidth 5120ip address 10.56.1.0 255.255.252.0ip hold-time eigrp 1 35ip nhrp authentication testip nhrp map multicast 192.168.31.253
ip nhrp map 10.56.0.1 192.168.31.253ip nhrp network-id 105600ip nhrp holdtime 600ip nhrp nhs 10.56.0.1ip nhrp cache non-authoritativeip route-cache flowip summary-address eigrp 1 10.192.0.0 255.255.255.0 5load-interval 30tunnel source 192.168.0.2tunnel destination 192.168.31.253tunnel protection ipsec profile vpn-dmvpn
!
GigabitEthernet 0/0.2200
GigabitEthernet 0/0.3300
Tunnel Affinity to Distinct Subinterface
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Design Guide:Crypto Configuration
!crypto isakmp policy 10encr aes 256authentication pre-sharegroup 2crypto isakmp key bigsecret address 192.168.31.254crypto isakmp key bigsecret address 192.168.31.253crypto isakmp keepalive 10!!crypto ipsec transform-set AES_SHA_TUNNEL esp-aes 256 esp-sha-hmac!crypto ipsec profile vpn-dmvpnset transform-set AES_SHA_TUNNEL!
AES 256 Used in All Testing
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Case Study:Large Branch Topology Model
1. May have:
Redundant CPE or redundantlinks on same CPE
Dedicated Internet connection,TDM voice trunks
Gigabit Ethernet connection
Hubs/Campus
Branch
E t h e
r n e t
v i r t u
a l
C
i r c u i t s
PSTN
CiscoCallManager
VoiceGateway
7200VXR
ISR
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Case Study: Campus Head-EndDeployment Requirements
SJC
DEN
DFW
ORD
RDU
NYC
YOW
ATL`
Branch Frame-RelayMigration, T1 Rates
Teleworker Deployments Asymmetrical 3–6 Mbps
Limited Number of Sites in Metro Area
10M–100 Mbps
Next-Generation WAN/MAN
MPLS VPNL3 VPNEoMPLS
Psuedowire
InternetLeased Line
Ethernet HandoffBroadband
MetroEthernet
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Case Study:Campus Head-End - Large Scale
1. SP can offer Ethernet hand-off when no fiber to the prem
Using Ethernet over TDM technology
P
P PE
PE
CPE
CPE
Si
Si
Si
SiSiSi
CE
CE
CPE
Frame Relay
P VC
Campus
PE
BranchLocations Ethernet over PDH (T1/E1/T3/E3)
PPP/MLPPP/BCP (RFC 1990/3518)
Gigabit Ethernet
Ethernet Over
MPLS (EoMPLS)
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Design Guide Configuration: 7600Head-End with Encryption
! policy-map Branch
class REAL_TIME police 3072000
conform-action transmitexceed-action dropviolate-action drop
priorityset cos 5class GOLD
shape average 460800set cos 3class SILVER
shape average 768000set cos 2class class-default
shape average 2480000set cos 0
!
!interface Tunnel0 bandwidth 100000ip address 10.56.0.1 255.255.248.0no ip redirectsip nhrp authentication testip nhrp map multicast dynamicip nhrp network-id 105600ip nhrp holdtime 1800ip nhrp registration timeout 120load-interval 30tunnel source Loopback0tunnel mode gre multipointtunnel protection ipsec profile vpn-dmvpncrypto engine slot 2/0 inside!
!interface GigabitEthernet4/0/0.2850description r22-21
encapsulation dot1Q 2850ip address 192.168.20.85 255.255.255.252crypto engine slot 2/0 outsideservice-policy output Branch
!
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Case Study:QoS Best Practices
1. Leverage the service provider when possible
2. Provision SP-enabled QoS on the access circuit
Provides greater scalability
3. QoS from headend to branch needed when:
Buying guaranteed bandwidth by traffic class
No SP QoS, and/or congestion of access link likely
4. QoS from branch to head-end needed when:
There is potential to overload the headend
CPE has the potential of exceeding guaranteed bandwidthrate
5. Ensure CPE rate and SP rate mean the same thing
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E-Line or E-LAN:Ingress DSCP Marking
!
class-map match-any In-business
match protocol ftp
match protocol telnet
class-map match-any In-voice
match protocol rtp audio
match protocol rtcp
Class-map match-any in-signalingmatch protocol sip
match protocol skinny
policy-map Markit
class In-voice
set ip dscp ef
class In-business
set ip dscp cs2class In-signaling
set ip dscp cs3
class class-default
set ip dscp default
interface GigabitEthernet0/0.20
description LAN side 1
ip address 10.2.1.1 255.255.255.0
encapsulation dot1Q 20
service-policy input Markit
interface GigabitEthernet0/0.30description LAN side 2
ip address 10.3.1.1 255.255.255.0
encapsulation dot1Q 30
service-policy input Markit
§ Traffic classified by protocol
§ Incoming packets haveDSCP remarked
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EP-LAN QoS
1. Similar to campus LAN or broadcast network, any-to-anywithout the need to traverse a hub site
2. Can run as Layer 2 (802.1Q trunks), or can use as aLayer 3 broadcast network
3. Best used with call admission control for voice,Cisco TelePresence, and video conferencing
4. QoS for the physical interface is more scalable, candefine per destination QoS via a traffic class perdestination
5. Unless specified, ISR samples follow6. Please see Enterprise QoS Solution Reference Design
Guide www.cisco.com/go/srnd for recommended trafficclass implementation
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EP-LAN Example:Shaping by Traffic Class
class-map match-all Gold
match dscp ef cs5
class-map match-all Silver
mach dscp cs4 cs3 af31
class-map match-all Bronze
match dscp cs2 af21 cs1
policy-map CPE
class Gold
priority 5120
class Silver
shape average 2048000
set ip dscp cs3
class Bronze
shape average 5120000
set ip dscp cs2
class class-default
shape average 10240000
set ip dscp0
fair-queue
interface GigabitEthernet0/1
description WAN side
ip address 10.2.1.1 255.255.255.0
duplex auto
speed auto
media-type rj45
service-policy output CPE
§ Example: SP classifies by IP precedence,four classes
5 Mbps CS5, 2 Mbps CS3, 5 Mbps CS2, 10 Mbps CS0
§ Remarks DSCP to match SP class
§ Uses untagged interface, so E-LAN not used
as trunked core, but as single broadcastnetwork
§ No CPE guaranteed bandwidth definitionneeded
§ Other DSCP values remarked as DSCP 0
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EP-LAN: Hierarchical Shaping
class-map match-all Realtime
match dscp ef cs5 cs3 af31
class-map match-all Business
match dscp cs6 cs4 cs2 af21 cs1
!
policy-map CPE
class Realtime
priority 1024class Business
bandwidth 2048
police rate 2048000 bps
conform-action set-dscp-transmit cs4
exceed-action set-dscp-transmit 0
violate-action set-dscp-transmit 0
class class-default
fair-queue
!
policy-map Shaper
class class-default
shape average 5024000
service-policy output CPE
interface GigabitEthernet0/1
description WAN side
ip address 10.2.1.1 255.255.255.0
service-policy output Shaper
§ Example: SP provides one class
(5 Mbps)CPE prioritizes based onthree classes with SP rate
§ Assumes a branch in ahub/spoke design
Traffic shaped to 5 Mbpsto not overrun hub
§ Within 5m, 1m priority forvoice/signaling, = 2 MB guaranteedto business, = 2 MB default
§ Business traffic > 2 m remarkedto default class
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EVPL QoS
1. Similar to PVCs, per VLAN shaping required at sites withmultiple EVCs (VLANs)
2. Even with a single EVC, define a subinterface; providesconsistent configs
3. If a single traffic class, use hierarchical QoS4. SP may provide a peak information rate (PIR) greater than the
committed information rate (CIR)
Shaping to CIR ensures no drops, but does not use the full potential
Shaping to PIR maximizes bandwidth, but may result in policed packets
5. Unless specified, ISR samples follow
6. Please see Enterprise QoS Solution Reference Design Guidewww.cisco.com/go/srnd for recommended traffic classimplementation
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EVPL: Per VLAN, per Class Shaping
class-map match-all Gold
match dscp ef cs5
class-map match-all Silver
mach dscp cs4 cs3 af31
class-map match-all Bronze
match dscp cs2 af21 cs1
!
policy-map CPE
class Gold
priority 5000
class Silver
shape average 15360000
set cos 3
class Bronze
shape average 10240000
set cos 2
class class-default
shape average 10240000
set cos 0
fair-queue
interface GigabitEthernet0/1
duplex auto
speed auto
media-type rj45
interface GigabitEthernet0/1.20
description WAN side
ip address 10.2.1.1 255.255.255.0
encapsulation dot1Q 20
service-policy output CPE
§ Example: SP classifies by CoS, four classes
CoS 5: 5 Mbps, CoS 3 15 Mbps: CoS 2: 10 Mbps,CoS 0: 10 Mbps
§ Remarks CoS 4 to match SP class CoS 3
§ Assumes traffic per class is policed if exceeded
§ Voice class does not need CoS set,done by default
§ Sample shows one subinterface,may be multiple
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EVPL: Per VLAN Hierarchical QoS
class-map match-all Gold
match dscp ef cs5
class-map match-all Silver
mach dscp cs4 cs3 af31
class-map match-all Bronze
match dscp cs2 af21 cs1
!
policy-map CPE
class Gold
priority 1000
class Silver
bandwidth 1536
police rate 1536000 bps
conform-action transmit
exceed-action set-dscp-transmit 0
violate-action set-dscp-transmit 0
set cos 2
class Bronze
bandwidth 1024
set cos 2
class class-default
set cos 0
interface GigabitEthernet0/1
no ip address
duplex auto
speed auto
media-type rj45
interface GigabitEthernet0/1.20
description WAN site 1
ip address 10.2.1.1 255.255.255.0
encapsulation dot1Q 20service-policy output Shaper
interface GigabitEthernet0/1.30
description WAN site 2
ip address 10.3.1.1 255.255.255.0
encapsulation dot1Q 30
service-policy output Shaper
§ Example: SP classifies entire EVC (single class)
Enterprise determines how to allocate with the SLA
§ Remarks business above guarantee to DSCP/CoS 0
§ Shapes to 5 Mbps per EVC
§ Values can be based on % versus bps
policy-map Shaper
class class-default
shape average 5120000
service-policy output CPE
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class-map match-all Goldmatch dscp ef cs5
class-map match-all Silver mach dscp cs4 cs3 af31
class-map match-all Bronzematch dscp cs2 af21 cs1
!!
policy-map Branch
class Goldset cos 5priority
police 1024000 conform-action transmitexceed-action transmit violate action drop
class Silver set cos 3
bandwidth remaining ratio 30class Bronzeset cos 2bandwidth remaining ratio 20
class class-defaultset cos 0
!policy-map Shaper class class-defaultshape average 5120000service-policy Branch
interface GigabitEthernet0/2/0
description GigabitEthernet0/2/0no ip addressno ip proxy-arpload-interval 30
negotiation autoplim qos input map ip dscp-basedplim qos input map ip dscp 34 40 queue strict-priorityno cdp enable
hold-queue 4096 inhold-queue 4096 out!interface GigabitEthernet0/2/0.2200
description r1-1encapsulation dot1Q 2200ip address 192.168.0.1 255.255.255.252no cdp enable
service-policy output Shaper !interface GigabitEthernet0/2/0.2201description r1-2
encapsulation dot1Q 2201ip address 192.168.1.1 255.255.255.252no cdp enableservice-policy output Shaper
!!... and so on
EVPL: Per VLAN Hierarchical QoS, ASR
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EVPL: Per VLAN Hierarchical QoS, ME3750
class-map match-all R1-2200
match vlan 2200
class-map match-all R2-2201
match vlan 2201
!...and so on ...
class-map match-all Gold
match ip dscp ef cs5 af41class-map match-all Silver
match ip dscp cs4 cs3 af31
class-map match-all Bronze
match ip dscp cs2 af21 cs1
interface GigabitEthernet1/1/1
switchport mode trunk
switchport nonegotiate
service-policy output Hqos-policy
load-interval 30
mls qos trust dscp
end
policy-map Branch-traffic
class Gold
set cos 5
priority
class Silver
bandwidth percent 30
set cos 3
class Bronze
bandwidth percent 20set cos 2
class class-default
bandwidth percent 10
set cos 0
!
policy-map Hqos-policy
class R1-2200
shape average 51200000
service-policy Branch-traffic
class R2-2201
shape average 51200000
service-policy Branch-traffic
! ..... and so on ...
§ Example: SP classifies entire
EVC (single class)
§ Shapes to 50 Mbps per EVC
§ Within 50 Mbps, guaranteesbandwidth per traffic class
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Agenda
1. Metro Ethernet Services Overview
2. Design and Deployment Considerations
3. Customer Premises Equipment (CPE) Selection
4. Case Study
5. QoS CPE Configuration Examples
6. Summary
Ethernet Access forNext Generation Metro and
Wide Area Networks
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Summary and Companion Sessions
Summary
1. Rapid migration from Frame Relay WAN to MPLS-based WAN
2. Ethernet handoff to enterprise increasingly popular—lowercosts
3. Data rates increasing—broadband, fiber in metro areas
4. QoS—shapers per port, or per class of service—not clock rateof physical interface
5. Ensure that CPE shaped rate maps to actual SP policed rate
Recommended Links
1. www.cisco.com/en/US/netsol/ns577/networking_solutions_ white_papers_list.html
2. http://metroethernetforum.org/Presentations
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Design Guidewww.cisco.com/go/srnd
Also available at http://www.cisco.com/go/cvd
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Q and A
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Recommended Reading
1. Continue your Cisco Livelearning experience withfurther reading from CiscoPress
2. Check the RecommendedReading flyer for suggestedbooks
Available Onsite at the Cisco Company Store
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Complete Your OnlineSession Evaluation
1. Give us your feedback
2. Complete your session evaluation now
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Session Abstract
Abstract for Networkers 2008 BRKRST-3042
Title: Ethernet Access for Next Generation Metro and Wide Area Networks
This session presents design recommendations, configuration examples,and scalability test results for implementing a QoS enabled WAN to supportVoice, Video and Data where the service provider WAN interface is Ethernet.
Service providers are commonly offering Ethernet hand-off at the branch andheadend campus locations via Metro Ethernet services or Ethernet overMPLS. The enterprise network manager is faced with enabling QoS on anEthernet user-network interface (UNI) that has a higher data rate than thesubscribed service.
This session provides guidance on implementing the QoS techniques ofshaping and policing on Cisco routers and switches to provide similar
functionality for Ethernet access as per-VC queuing provided for ATM andtraffic shaping provided for Frame Relay. This session is especially relevantfor customers migrating from legacy frame or cell switched providers topacket and label switched next generation WANs.
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UNI Definition
1. General
Demarcation point betweenservice provider and subscriberresponsibilities
Dedicated to a single subscriber
2. Data planeEthernet frame flow(IEEE 802.3)
Tagging (802.1Q)
Traffic management
3. Control Plane
Static service discovery
Dynamic connection setup
4. Management plane
QoS management
OAM
Protection and restoration
Customer Edge(CE)
User NetworkInterface
(UNI)
User NetworkInterface
(UNI)
Customer Edge(CE)
Service Attributes
MetroEthernetNetwork
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CPE QoS Quick Guide (1 of 4)
1. Cisco Catalyst® 2950, 2960, 3550, 3560, 3750 (non-Metro), 6000Series Switches
Traffic shaping is not available
Replace or front end with a Cisco Catalyst ME3400, ME3750, 4900, 6500/SIP, etc.
If enhanced function required, replace with an ISR 3845, etc.
If starting with 100 Mbps but going to gigabit Metro Ethernet, consider multitier model
2. Cisco Catalyst 4948 Switch, ME3750, ME3400
Traffic shaping is available
Cisco Catalyst 3750 Metro shapes on its two ES ports(which support only gigabit speed)
Cisco 3400 Series shapes on its two NNI ports; they are 10/100/1000
Cisco Catalyst 4900 Series has no fiber gigabit port(10/100/1000 rj45, 10 Gbps fiber-only)
www.cisco.com/en/US/products/ps6021/products_data_sheet0900aecd80246552.html
www.cisco.com/en/US/products/hw/switches/ps5532/products_data_sheet09186a00801eb820.html
www.cisco.com/en/US/products/ps6580/products_data_sheet0900aecd8034fef3.html
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CPE QoS Quick Guide (2 of 4)
1. Cisco Catalyst 6500 Series Switch
Traffic shaping is available with configurations listed below
Can shape if switch contains one of these modules withEthernet interface
SIP/SPA (PXF-based port adapter)
OSM (optical service module)
FlexWAN module
Without one of the aforementioned modules
Add one of the these modules
Front end with a Cisco Catalyst ME3750 or ME3400switches
www.cisco.com/en/US/products/hw/switches/ps700/products_ tech_note09186a00801c8c4b.shtml
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CPE QoS Quick Guide (3 of 4)
1. Cisco Catalyst 4500 Series Switch
Traffic shaping is available with configurations listed below
If not, upgrade to the one of the modules shown below, or front end using a Cisco Catalyst 3750 Metro or3400 Metro switch
Can shape if switch contains one of these modules with Ethernet interface
Supervisor 2+, 3, 4, 5 traffic shape on on-board supervisor Ethernet ports
Supervisor 2+, 2+TS, 3, 4, bandwidth can be configured on these portsUplink ports on supervisor engines
Ports on the WS-X4306-GB GBIC module
Ports on the WS-X4506-GB-T CSFP module
The two 1000BASE-X ports on the WS-X4232-GB-RJ module
The first two ports on the WS-X4418-GB module
The two 1000BASE-X ports on the WS-X4412-2GB-TX module
Supervisor Engine 5, bandwidth can be configured on all ports(10/100 Fast Ethernet, 10/100/1000BASE-T, and 1000BASE-X)
SW-X4604-GWY can also shape, but performs as a router versus a switch
www.cisco.com/en/US/docs/switches/lan/catalyst4500/12.2/25sg/configuration/guide/qos.html#wp1229822
www.cisco.com/en/US/partner/products/hw/switches/ps663/products_tech_note09186a00800946e9.shtml
www.cisco.com/en/US/partner/products/hw/switches/ps663/products_tech_note09186a00800e6708.shtml
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Metro Ethernet QoS Quick Guide
1. Function and performance are just as important with Metro Ethernet as they are withtraditional WAN; provisioning access layer switches will reduce abilities for enhancedQoS, voice, security, and application acceleration
2. CPE abilities to consider include: support of VLAN IDs up to 4094, throughput ability tomatch desired speed with desired functions, traffic shaping (by class and bysubinterface), traffic prioritization (queuing, policing, random early discard) directly orwithin a shaped rate, ability to provide enhanced functions, traffic remarking (ToS andCoS bits)
3. Consider multitier with existing CPE who require a combination of features andperformance can front-end the existing CPE with another CPE; QoS is an easy functionto separate; Layer 3–7 QoS can be accomplished in switches forwarding at Layer 2
4. QoS is an umbrella term; specific Metro Ethernet service and customer needs dictateCPE requirements; example: most deployed Cisco Catalyst 3750/6500 SeriesSwitches cannot traffic shape, there are modules for Cisco Catalyst 6500 Series Switchand a model of the Cisco Catalyst 3750 (Metro) Series Switch that can meet QoSrequirements for most designs and Metro Ethernet services, ISRs support robust QoS
5. Ensure that the CPE supports the Ethernet media and speeds required now and in thenear future; for example, the Cisco Catalyst 3750 Metro Switch only supports gigabit forstrong upstream QoS, the Cisco Catalyst 3400 Metro Switch only supports 100 Mbpsupstream; the Cisco Catalyst 6500 Series Switch supports strong QoS on specificmodules; 2821s and up support 10/100/1000 but won’t provide gigabit line rateperformance with features
CPE Selection
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Metro Ethernet Connectivity
CPE Recommendations
1. E-LAN QoS
Packet marking (802.1P/ToS)
Per destination QoS(mark, prioritize, shape)
Physical interface QoSwith call admission control
2. E-Line QoS
Per VLAN queuing
VLAN IDs up to 4094
Mark VLAN ID/CoS
by traffic classSame VLAN IDs on twointerfaces if campus VLAN IDis same as EVPL VLAN ID
Recommended Support
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Cisco E-OAM implementationShipping Platforms and Features (Cont.)
Cisco1800
Cisco2800
Cisco3800
CiscoME-3400
CiscoCatalyst3750-ME
CiscoCatalyst6500*,
ME-6524
Cisco 7600
CFM(IEEE802.1ag)
12.4(11)T 12.4(11)T 12.4(11)T 12.2(25)SEG 12.2(25)SEG 12.2(33)SXH 12.2(33)SRA
Link OAM(IEEE
802.3ah)
12.4(15)T 12.4(15)T 12.4(15)T 12.2(35)SE1 12.2(35)SE1 12.2(33)SXH 12.2(33)SRA
EthernetLMI PE
n/a n/a n/a 12.2(25)SEG 12.2(25)SEG 12.2(33)SRB
EthernetLMI CE
12.4(9)T 12.4(9)T 12.4(9)T 12.2(37)SE 12.2(37)SE
Link OAMto CFMIW
n/a n/a n/a 12.2(35)SE1 12.2(35)SE1 12.2(33)SRB
CFM toE-LMI IW n/a n/a n/a 12.2(25)SEG 12.2(25)SEG 12.2(33)SRB
IP SLA forMetroEthernet
12.2(40)SE 12.2(40)SE 12.2(33)SRB
Platform
Feature
X = shipping; n/a = not applicable; (*) Cisco Catalyst OS 8.6 also supported
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Cisco E-OAM implementationShipping Platforms and Features (Cont.)
Cisco 7200 7200-NPE-G2 Cisco 7201 Cisco 7301
CFM(IEEE802.1ag)
12.4(15)T3 12.4(15)T3 12.4(15)T3
Link OAM(IEEE
802.3ah)
12.4(15)T3 12.4(15)T3 12.4(15)T3
EthernetLMI PE
n/a n/a n/a
EthernetLMI CE
12.4(15)T3 12.4(15)T3 12.4(15)T3
Link OAMto CFMIW
n/a n/a n/a
CFM to
E-LMI IW n/a n/a n/a
IP SLA forMetroEthernet
Platform
Feature
X = shipping; n/a = not applicable