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Section 8 Module 3 Page 1
All Rights Reserved Alcatel-Lucent 2009TOS36013-0804 Issue 1.0
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83All Rights Reserved Alcatel-Lucent 2009Module 3
VPLS ConfigurationTOS36013-0804 Issue 1.0
Section 8Basic Services
5620 SAM5620 SAM (Service Aware Manager) R7.0 Operator
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Document History
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First editionGARCIA LOZANO, Ren2009-08-1401
RemarksAuthorDateEdition
Document History
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Module Objectives
Upon completion of this module, you will be able to:
Describe the characteristics of a VPLS service List the steps in configuring a VPLS service
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How is a VPLS provided over MPLS?
Bridging capable PE routers connected with a full mesh of MPLS LSP tunnels
Per-Service VC labels negotiated using draft-Martini
Unknown/broadcast traffic replicated in a service domain
MAC learning over tunnel & access ports
separate FIB per VPLS
LSP Full-
Mesh
IP / MPLS
Network
PE A PE C
PE B
PE D
VPLS
ServiceVPLS
Service
For each VPN at each site, a Customer Edge (CE) device connects to the Provider Edge (PE) router via a point-
to-point access connection.
Ethernet serves as the framing technology between the CE device and the PE router in the providers network.Frames can include IEEE 802.1Q Ethernet VLAN tags, which allow customers to segment their networks andassign quality of service priorities to LAN traffic. VPLS also supports QinQ encapsulation, where a secondVLAN tag is added as a service delimiter. From the customers perspective, the entire VPN looks like a singleEthernet LAN, with the PE acting as a bridge that switches frames on the basis of their Layer-2 destinationMAC addresses.
On the providers side, however, PEs are interconnected with Generic Routing Encapsulation (GRE) and/orMultiprotocol Label Switching (MPLS) tunnels. If PEs are connected using GRE tunnels traffic is encapsulatedand routed through the core network using standard IP frame formats and addressing. If PEs are connectedusing MPLS tunnels traffic is encapsulated in an MPLS frame and transmitted using MPLS labels. MPLS routescan be signaled using RSVP-TE or LDP.
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VPLS
Service
L2 switch
VPLS: Customer View
VLAN A
All locations appear to be on the same Ethernet LAN
Entire provider network appears to be a Layer 2 switch
CE-PE interface
Simple Ethernet interface
Removes L2 protocol conversionbetween LAN and WAN
No additional training required onWAN technologies such as FR CE
CE
CE
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VPLS #1
10.10.1.
x
VPLS #2
20.20.2.x
CE A
CE B
CE A
CE B
CE A
CE B
VPLS: Customer Operation
Customers maintain complete control over routing
Adding new sites simplified: no re-configuration at existing
sites
Customers maintain complete control over their routing (unlike with VPRN).
This clear demarcation of functionality between service provider and customer makes troubleshooting easier
Adding a new site requires no configuration of the service providers equipment or the customer equipment atexisting sites
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VPLS: Service Provider View
Clear demarcation of functionalitybetween service provider andcustomer networks
Service provider does not have todeal with customer routing issues
Separate Ingress/Egress TrafficParameters
Detailed billing and accounting
IP / MPLSNetwork
IP / MPLS
Network
Ethernet
CE 7750
Access
Network
PE
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VPLS - VC Label
VC-label Signaling between PEs per VPLS serviceinstance Each PE initiates a targeted LDP session to the far-
end System IP address
Tells far-end what VC label to use when sendingpackets for each service
PE1->PE2: For Svc-id 101 UseVC-label pe2-1
PE2->PE1: For Svc-id 101 Use VC-label pe1-2
PE1->PE3: For Svc-id 101 Use VC-label pe3-1
PE2->PE3: For Svc-id 101 Use VC-label pe3-2
PE3->PE1: For Svc-id 101 Use VC-label pe1-3
PE3->PE2: For Svc-id 101 Use VC-label pe2-3
PE-1
PE-2
PE-3
M-1
M-3
M-4
pe2-1
pe1-2
pe3-2
pe3-1
pe1-3
pe2-3VPLSVPLS
Customer packets are transported either inside an IP packet (GRE) or inside an MPLS packet.
The packet carries an inner (VC) label that identifies the service the packet belongs to. This label issometimes referred to as the Martini label.
When a packet arrives at the destination, the outer IP address or MPLS label is stripped off. At this point theinner label is examined to determine which service the packet belongs to.
After determining which service the packet belongs to, the customers Ethernet packet is examined and itsMAC address is looked up in a table on the PE to determine which SAP the packet should go to.
VC labels can be assigned manually or automatically using targeted LDP (TLDP). The TLDP protocol is used todynamically negotiate VC labels between PEs. This method is not error prone and scales much better thenmanually assigning labels.
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Spoke and Mesh SDPs
Flooded traffic received onspoke SDP is:
replicated on all other ports(spoke and mesh SDPs and SAPs)
not replicated on the port it wasreceived on
Flooded traffic received on mesh
SDP on the Service is: replicated on spoke SDPs and SAPs
not transmitted on any mesh SDPs
PE-A
Service G
SAP
SDP
SDP
SDP
Mesh
Spoke
SDP
PE-A
Service G
SAP
SDP
SDP
SDP
Mesh
Spoke
SDP
Spoke SDP
Mesh SDP
Spoke
An SDP is a logical method of advertising and connecting to an encapsulation tunnel and must be bound to a
service before the service can be used. The method of binding an SDP to a service, spoke or mesh,determines how flooded traffic is transmitted.
Spoke SDPA spoke SDP treats flooded traffic like a traditional bridged port. Flooded traffic received on a spoke SDP is
replicated on all other ports (other spoke and mesh SDPs or SAPs) but not the port on which it was received.
Mesh SDPMesh SDPs bound to the same service are treated like a single bridge port. Flooded traffic received on a mesh
SDP on the service is replicated to other ports (spoke SDPs and SAPs) but are not transmitted to other meshSDPs.
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Configuration Workflow - VPLS
CreateService
CreateService
Specify Service Type Specify Service Sites
Create SAPsCreate SAPs
Configure L2 Interfaces Configure Access ports Specify MTU Assign Encapsulation value
Create SDP
Bindings
Create SDP
Bindings
Select a Service Tunnel
Assign VC Label
Manage ServiceManage Service View Service Topology Properties
Properties
Create aCustomer
Create aCustomer
Create a Customer
The workflow illustrated above describes the steps for a network administrator or operator to configure a
Virtual Private LAN Service.
Customer - must be assigned to the service. Though the service can have only one Customer,that customer may be assigned to more than one service.
Create Service - specify the service type (VPLS) and add the appropriate service sites.
Create Service Access Points as discussed, a SAP is a Layer 2 interface configured on a physical port.Configure the port Mode for Access, define the Encapsulation Type, specify the Encapsulation ID (asrequired) and specify the service MTU size.
Create SDP Bindings Create the Spoke SDP or Mesh SDP Bindings by associating the service to servicetunnels. The VC Label may be assigned manually, by the network administrator or operator, orautomatically, by the 5620 SAM.
Manage Service through the Properties window and/ or by using the Service Topology View.
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Create a Customer
1.Select ManageCustomers 2.Select Create
3.Define the
CustomerAttributes
A service it must be associated with a customer. The customer may be associated with multiple services yet
there can only be one customer per service.
To create a customer: Select Manage Customers from the Main menu Click on the Create button Under the General tab of the Customer Create window, complete the appropriate customer information
then click OK.
Verify that the customer has been created by selecting Manage Customers from the Main menu and clickthe Search button. A list of customers, based upon the configured filter, will appear. Verify the customerappears in the list.
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Configure Access Port
As discussed, a service requires a port facing the customer edge to be configured for Access and an
Encapsulation type specified. To configure a port:
Navigate to the Equipment view in the Navigation Tree
Expand the tree and select the appropriate port or ports. It is possible to configure multiple ports at thesame time by through the Shift Click or Ctrl Click method.
Right-click and select Properties from the contextual menu
From the Mode drop-down menu, select Access
From the Encapsulation Type drop-down menu, select the appropriate encapsulation type
Set the port MTU. Remember that the port MTU must be set to a value set to support the largest serviceMTU to be supported on that port.
Select OK to complete the configuration.
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Create a VPLS
1. Select Create Service VPLS
Automatic SDP Binding Creation (optional)
Description (optional)
Service Name
2. Choose Select
3.Select the Customer
To create a service, select the service type and assign the managed devices upon which the service will
terminate, referred to as the Service Sites.
To create a VPLS:
Select Create Service VPLS from the Main Menu
Click the Select button in the Customer block
Select a customer from the list that appears and click the OK button
Complete the remaining parameters, as required. Though optional, providing a service name and relevantdescription will enable the network administrator or operator to find the service using the Search filter.
Click Apply
Automatic SDP Binding Creation This option enables the network administrator or operator to leave the
creation of SDP bindings to the 5620 SAM instead of having to manually assign service tunnels (discussedlater in this module).
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Create a VPLS
1. Components VPLS Create Site
3. Confirm Sites
2. Select Sites
Having clicked the Apply button, the configuration window remains open and the changes are saved in the
5620 SAM database. However, service components (Service Sites, Access Interfaces and SDP Bindings) haveyet to be configured for the service to be commissioned.
To configure service sites: Navigate to the Components window of the service configuration form Select VPLS and right-click Select Create Site and select the sites to participate in the VPLS service from the list. This may be done
individually or by selecting multiple entries at once. Click the OK button Confirm the sites have been added in the Components window
It is important to remember that, even though they appear in the configuration window, the changes will notbe sent to the managed devices and saved to the 5620 SAM database until the OK or Apply button at the
bottom of the window (referred to as the Containing Window) is clicked.
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Create SAPs
2. Port tab click on Select1. Right-click Create L2 access Interface
3. Search OK
Service Access Points are virtual interfaces to provide customer access to the service providers network. An
SAP consists of: a physical port configured to support Access points; an encapsulation type; and, anencapsulation ID value unique to the port.
To create a SAP:
Navigate to the Component window for the service
Navigate to the Access Interface of the appropriate Site
Right-click and select Create L2 Access Interface
Click the Port tab and then click the Select button
Click the Search button. All Access ports on the managed device will appear in the list. Select theappropriate port and click the OK button
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Create SAPs
1. Assign Encapsulation Value(as required)
2. Confirm Access Interface
The SAP also requires an encapsulation ID value that is unique to the port upon which it is being created. To
assign an encapsulation ID:
Select the Port tab
Assign the Outer Encapsulation Value and Inner Encapsulation Value, as required
Click the OK or Apply button
Confirm that the SAP has been configured. To so so:
Expand the Access Interface list under the Components window
Confirm the SAP is listed and verify its status.
Repeat this process for the remaining Access Interfaces to participate in the VPLS.
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Create SDP Bindings
1. Create Mesh SDP Binding
1. Create Spoke SDP Binding
2. Select Termination Site (mandatory)
Service Distribution Paths are required when Service Access Points are located on separate network devices
(distributed service). An SDP is created when a service is associated (bound) to a Service Tunnel.
The network administrator or operator has the option of either manually or automatically creating SDPbindings. To manually create the SDP Bindings:
Expand the Site listing under the Components window for the service
Navigate to either Mesh SDP Bindings or Spoke SDP Bindings
Right-click and select Create Mesh SDP Bindings or Spoke SDP Bindings, as required based upon networkrequirements.
Click the Select button in the Termination Site section of the new window
Select the terminating Site ID from the list and click OK.
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Create SDP Bindings
1. Manual Tunnel Assignment
3. Confirm SDP Configuration
2. Select tunnel
OK
1. Automatic Tunnel Select
With the Terminating Site identified, the network administrator or operator can assign a Service Tunnel. To
manually assign a Service Tunnel:
Click the Select button in the Tunnel section of the configuration window
Select the appropriate Service Tunnel from the list
Click the OK button
SDP Binding configuration is verified by expanding the appropriate Site listing under the Componentswindow.
Repeat this process until the remaining SDP Bindings required to support the VPLS have been configured.
Click the OK or Apply at the bottom of the containing window to save the configuration to the 5620 SAM andsend the configuration changes to the managed nodes.
Automatic SDP Binding Creation is possible if the network administrator or operator has checked this optionunder the General tab of the configuration window (already discussed). When selected, it is possible tospecify the Tunnel Transport protocol from the drop-down menu in the configuration form, as shownabove.
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Manage VPLS Service
Once created, the network administrator or operator is able to view and/ or manage the VPLS service from
the 5620 SAM GUI.To manage or view the VPLS service configuration:
Select Manage Services from the Main Menu
Set the Search filter parameters, as required
Click on the Search button
Select the service from the list.
The configuration window appears on the screen. Service configuration information is provided under theappropriate tabs listed at the top of the window. Parameters in drop-down menus or in the white blocksmay be changed. Changes to an existing service will prompt a warning to which the network administratoror operator will be required to acknowledge before changes will be affected.
Viewing a graphical representation of the service is possible by clicking on the Topology View button of eitherwindow. An example is provided on the next page.
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View Service Topology
Service ID: Site ID
Service Type
Port ID:Outer Encap: Inner Encap
Service Access PointSDP Bindings
The Service Topology View displays the service components configuration and status information at a glance.
Information available includes: Service Type indicated within the Site icon (VPLS, in this case). The Service ID and Site ID are posted
below the icon. Service Access Point the square with two arrows contained within the icon. The Port ID and Outer and
Inner Encapsulation ID are posted below the icon. SDP Bindings arrows indicate direction of the bindings between service sites.
Select any component in the Topology View.Right-clicking provides a contextual menu for the selected item.
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End of ModuleVPLS Configuration
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