Ospfv3 Lab 2

CCIE R&S by Narbik Kocharians Advanced CCIE R&S Work Book 5.0 Page 1 of 23 2015 Narbik Kocharians. All rights reserved

Advanced CCIE Routing & Switching

v5.0

www.MicronicsTraining.com

Narbik Kocharians

CCSI, CCIE #12410

R&S, Security, SP

VOL -II I


R1

:1

R7

:7

R2R8

:8

17::/64 G0/0F0/0

27::/64

G0/1

F0/1

Area 0

Area 1

28::/64 F0/0G0/0:2

Area 2

Lo0 - 2000:111:111:1110::111/64

Lo1 - 2000:111:111:1111::111/64

Lo2 - 2000:111:111:1112::111/64

Lo3 - 2000:111:111:1113::111/64

Lo0 - 2000:777:111:1110::111/64

Lo1 - 2000:777:111:1117::111/64

Lo2 - 2000:777:111:111A::111/64

Lo3 - 2000:777:111:111E::111/64

Lo0 - 2000:888:111:111B::111/64

Lo1 - 2000:888:111:111C::111/64

Lo2 - 2000:888:111:111D::111/64

Lo3 - 2000:888:111:111F::111/64

Task 1

Configure the above topology. DO NOT configure any routing protocol/s. The Link-local IPv6 addresses of these routers should be based on the following: R1 FE80::1 R2 FE80::2 R7 FE80::7 R8 FE80::8

On SW1:

SW1(conf ig)# int range f0/1 , f0/7

SW1(config - if - range)# Swi mode acc

Lab 2 Summarization of Internal and

External Networks


SW1(config - if - range)# swi acc v 17

SW1(config - if - range)# Spanning portf

SW1(config - if - range)# No shut

SW1(config)# int range f0/2 , f0/8


SW1(config - if - range)# Swi ac c v 28

SW1(config - if - range)# Spannin portf


On SW2:

SW2(config)# int range f0/2 , f0/7


SW2(config - if - range)# Swi acc v 27

SW2(config - if - range)# Spannin portf


On R1:

R1(config)# int f0/0

R1(config - if)# IPv6 address 17::1/64

R1(config - if)# IPv6 address FE80::1 Link - Local

R1(config - if)# No shut

R1(config)# Int Lo0

R1(config - if)# Ipv6 addr 2000:111:111:1110::111/64

R1(config )# Int lo1

R1(config - if)# Ipv addr 2000:111:111:1111: :111/64

R1(config )# Int Lo2

R1(config - if)# Ipv addr 2000:111:111:1112::111/64



On R7:

R7(config)# int g0/0


R7(config - if)# IPv6 address FE80::7 Link - loc al





R7(config - if)# IPv6 address FE80::7 Link - local


R7(config)# Int Lo0



R7(config - if)# I pv addr 2000:777:111:1117::111/64


R7(config - if)# Ipv addr 2000:777:111:111A::111/64


R7(config - if)# Ipv addr 2000:777:111:111E::111/64

To verify the configuration:

On R7:

R7#Ping 17::1

Type escape sequence to abor t.

Sending 5, 100 - byte ICMP Echos to 17::1, timeout is 2 seconds:

!!!!!

Success rate is 100 percent (5/5), round - trip min/avg/max = 1/2/8 ms

R7#Show ipv6 neighbors

IPv6 Add ress Age Link - layer Addr State Interface

17: :1 2 000a.b86b.dfd0 STALE Gi0/0

FE80::1 2 000a.b86b.dfd0 STALE Gi0/0

27::2 1 0013.c455.f569 STALE Gi0/1

FE80::2 0 0013.c455.f569 STALE Gi0 /1

On R2:

R2(config)# int F0/1




R2(config)# Int f0/0






On R2:

R2#Ping 27::7

Type escape sequence to abort.


!!!!!


R2#Sh ipv6 neighbors

IPv 6 Addre ss Age Link - layer Addr State Interface

27::7 0 24e9.b3ab.4921 REACH Fa0/1

FE80::7 0 24e9.b3ab.4921 DELAY Fa0/1

On R8:





R8(config)# Int Lo0

R8(config - if)# Ipv addr 2000:888:111:111 B::111/64


R8(config - if)# Ipv addr 2000:888:111:111 C::111/64


R8(config - i f)# Ipv addr 2000:888:111:111 D::111/64


R8(config - if)# Ipv addr 2000:888:111:111 F::111/64


On R8:

R8#Ping 28::2




!!!!!


R8#Show ipv6 neighbors

IPv6 Add ress Age Link - layer Addr State Interface

28::2 0 0013.c455.f568 REACH Gi0/0

FE80::2 0 0013.c455.f568 DELAY Gi0/0

Task 2

Configure OSPFv3 based on the following requirements:

Configure OSPFv3 on R1 and run all its directly connected interfaces in area 1. -family to configure this router. Configure the loopback

interfaces with their correct mask. The RID of this router should be set to

Configure OSPFv3 on R7 using an Address-family. This router should run OSPFv3 area 1 on its G0/0 and OSPFv3 area 0 on its G0/1. The loopoback interfaces of this router should be configured in area 0. Configure the loopback interfaces with their correct mask. 7

Configure OSPFv3 on R2 and run its F0/1 interface in area 0, and its F0/0 interface in area 2. DO -family to configure this router. The RID of

2

Configure OSPFv3 on R8 using an Address-family. This router should run OSPFv3 area 2 on its G0/1 interface. The loopoback interfaces of this router should be configured in OSPFv3 routing domain. The RID of this router should be set to

8

On R1:

R1(config)# ipv6 unicast - routing

R1(config)# IPv6 router ospf 1

R1(config - rtr)# router - id 0.0.0.1


R1(config - if)# ipv6 ospf 1 area 1


R1(con fig)# int range Lo0 - 3

R1(config - if - range)# ipv6 ospf 1 area 1

R1(config - if - range)# ipv6 ospf network point - to - point

On R7:


R7(config)# router OSPFv3 1

R7(config - router)# address - family ipv6 unicast

R7(config - router - af)# route r - id 0.0.0.7


R7(config - if)# OSPFv3 1 ipv6 area 0


R7(config - if)# OSPFv3 1 ipv6 area 1

You should see the following console message:

%OSPFv3- 5- ADJCHG: Process 1, IPv6, Nbr 0.0.0.1 on GigabitEthernet0/0 from

LOADING t o FULL, Loading Done

R7(config)# int range lo0 - 3

R7(config - if - range)# OSPFv3 1 ipv6 area 0

R7(config - if - range)# OSPFv3 network Point - to - point


On R7:

R7#Show ipv6 route ospf

IPv6 Routing Table - default - 17 entries

Codes: C - Connected, L - Local, S - Static, U - Per - user Static route

B - BGP, HA - Home Agent, MR - Mobile Router, R - RIP

H - NHRP, I1 - ISIS L1, I2 - ISIS L2, IA - ISIS interarea

IS - ISIS summary, D - EIGRP, EX - EIGRP external, NM - NEMO

ND - ND Default, NDp - ND Prefix, DCE - Destination, NDr - Redirect

O - OSPF Intra, OI - OSPF Inter, OE1 - OSPF ext 1, OE2 - OSPF ext 2

ON1 - OSPF NSSA ext 1, ON2 - OSPF NSSA ext 2, ls - LISP site

ld - LISP dyn - EID, a - Applica tion

O 2000:111:111:1110::/64 [110/2]

via FE80::1, GigabitEthernet0/0

O 2000:111:111:1111::/64 [110/2]



O 2000:111:111:1112::/64 [110/2]


O 2000:111:111:1113::/64 [110/2]


R7#Show ospfv3 neighbor

OSPFv3 1 address - family ipv6 (router - id 0.0.0.7)

Neighb or ID Pri State Dead Time Interface ID Interface

0.0.0. 1 1 FULL/DR 00:00:37 3 GigabitEthernet0/0

R7#Show ospfv3 inter br

Interface PID Area AF Cost State Nbrs F/C

Lo0 1 0 ipv6 1 P2P 0/0

Lo1 1 0 ipv6 1 P2P 0/0

Lo2 1 0 ipv6 1 P2P 0/0

Lo3 1 0 ipv6 1 P2P 0/0

Gi0/1 1 0 ipv6 1 DR 0/0

Gi0/0 1 1 ipv6 1 BDR 1/1

On R2:



R2(config - rtr)# router - id 0.0.0.2






%OSPFv3- 5- ADJCHG: Pr ocess 1, Nbr 0.0.0.7 on FastEthernet0/1 from LOADING

to FULL, Loading Done


On R2:






I1 - ISIS L1, I2 - ISIS L2, IA - ISIS interarea, IS - ISIS summary

D - EIGRP, EX - EIGRP external, NM - NEMO, ND - Neighbor Discovery

l - LISP

O - OSPF Intra, OI - OSPF I nter, OE1 - OSPF ext 1, OE2 - OSPF ext 2

ON1 - OSPF NSSA ext 1, ON2 - OSPF NSSA ext 2

OI 17::/64 [110/2]

via FE80::7, FastEthernet0/1

OI 2000:111:111:1110::/64 [110/3]


OI 2000:111:111:1111::/64 [110/3]


OI 2000:111:111:1112::/64 [110/3]


OI 2000:111:111:1113::/64 [110/3]


O 2000:777:111:1110::/64 [110/2]


O 2000:777:111:111 7::/64 [110/2]


O 2000:777:111:111A::/64 [110/2]


O 2000:777:111:111E::/64 [110/2]


On R8:

Since the task does not specify the area in which the loopback interfaces should be configured, the only other way to run them in OSPF is to redistribute them into OSPF routing domain. Lets configure R8 based on the requirements of this task:


R8(config - router)# route - map tst

R8(con fig - route - map)# match interface lo0 lo1 lo2 lo3

R8(config)# router ospfv3 1


R8(config - router - af)# router - id 0.0.0. 8

R8(config - router - af)# redistribute connected route - map tst

R8(config - if)# int g0/1


R8(config - if)# ospfv3 1 ipv6 area 2


%OSPFv3- 5- ADJCHG: Process 1, IPv6, Nbr 0.0.0.2 on GigabitEthernet0/0 from

LOADING to FULL, Loading Done


On R8:


IPv6 R outing Table - default - 21 entries




IS - ISIS summar y, D - EIGRP, EX - EIGRP external, NM - NEMO



ON1 - OSPF NSSA ext 1, ON2 - OSPF NSSA ext 2, ls - LIS P site

ld - LISP dyn - EID, a - Application

OI 17::/64 [110/3]


OI 27::/64 [110/2]


OI 2000:111:111:1110::/64 [110/4]


OI 2000:111:111:1111 ::/64 [110/4]


OI 2000:111:111:1112::/64 [110/4]


OI 2000:111:111:1113::/64 [110/4]


OI 2000:777:111:1110::/64 [110/3]

via FE80::2, GigabitE thernet0/0

OI 2000:777:111:1117::/64 [110/3]


OI 2000:777:111:111A::/64 [110/3]


OI 2000:777:111:111E::/64 [110/3]


On R2:


R2#Show ipv route o spf






l - LISP



OI 17::/64 [110/2]

via FE80::7, Fast Ethernet0/1

OI 2000:111:111:1110::/64 [110/3]


OI 2000:111:111:1111::/64 [110/3]


OI 2000:111:111:1112::/64 [110/3]


OI 2000:111:111:1113::/64 [110/3]


O 2000:777:111:1110::/64 [110/2]


O 2000:777:111:1117::/64 [110/2]


O 2000:777:111:111A::/64 [110/2]


O 2000:777:111: 111E::/64 [110/2]


OE2 2000:888:111:111 B::/64 [110/20]


OE2 2000:888:111:111 C::/64 [110/20]


OE2 2000:888:111:111 D::/64 [110/20]

via FE80::8, FastEthern et0/0

OE2 2000:888:111:111 F::/64 [110/20]


Task 3

Summarize the loopback interfaces configured on R1 and R7. There should be a single

two summary routes to accomplish this task.


In OSPF, summarization can be configured on an ABR and/or an ASBR. Since R7 is the ABR we should configure R7 to summarize the networks. The process of summarization in IPv6 is identical to IPv4, lets look at the IPv6 addresses on R1: Lo0 - 2000:111:111:1110::111/64

Lo1 - 2000:111:111:1111::111/64

Lo2 - 2000:111:111:1112::111/64

Lo3 - 2000:111:111:1113::111/64

We can see that they all start with 2000:111:111:111, but the last Hex digit in the forth Hextet is where they differ. Lets convert the last Hex digit of the forth Hextet to binary: 0 = 0 0 0 0

1 = 0 0 0 1

2 = 0 0 1 0

3 = 0 0 1 1

Lets count the common identical contiguous bits, we should see the following: 0 = 0 0 0 0

1 = 0 0 0 1

2 = 0 0 1 0

3 = 0 0 1 1

We can see that the last two binary digits is where they differ, therefore, all the bits up to the third binary digit of the forth Hextet are identical, therefore, the network that summarizes the above four networks should be:

2000:111:111:1110:: /62

Basically, we zeroed the last two bits in the forth Hextet, that gave us the 2000:111:111:1110:: and the prefix length specifies the number of identical contiguous bits, in this case we have: 16 bits : 16 bits : 16 bits : 14 bits or /62. Lets configure OSPFv3 to summarize these networks, but before we summarize lets verify the routing table of R2 and look for these networks:

On R2:

R2#Show ipv6 route ospf | Inc 2000:111:111

OI 2000:111:111:1110::/64 [110/3]


OI 2000:111: 111:1111::/64 [110/3]

OI 2000:111:111:1112::/64 [110/3]

OI 2000:111:111:1113::/64 [110/3]

To summarize:

On R7: R2(config)# router ospf v3 1


R2(config - rtr)# area 1 range 2000:111:111:1110::/62


On R2: R2#Show ipv6 route ospf | Inc 2000:111:111

OI 2000:111:111:1110::/62 [110/3]

On R7: R7#Show ipv6 route ospf | Inc /62|Null

O 2000:111:111:1110::/62 [110/2]

via Null0, directly connected

We can see that the discard-route is injected to avoid forwarding loops just like OSPFv2. Lets summarize the loopback interfaces configured on R7.

Lo0 - 2000:777:111:1110::111/64

Lo1 - 2000:777:111:1117::111/64

Lo2 - 2000:777:111:111A::111/64

Lo3 - 2000:777:111:111E::111/64

Once again the last Hex digit of the forth Hextet is where they differ, lets go through the same process:

0 0 0 0 0

7 0 1 1 1

A 1 0 1 0

E 1 1 1 0


In this case the contiguous identical bits stops at the third Hex digit of the forth Hextet, therefore, the summary route should be:

2000:777:111:1110::

And the prefix length should be: 16 bits : 16 bits : 16 bits : 12 bits or /60



R7(config - router - af)# area 0 range 2000:777:1 11:1110::/60


On R1:

R1#Show ipv6 route ospf | Inc /60

OI 2000:777:111:1110::/60 [110/2]

R1#Ping 2000:777:111:1117::111


Sending 5, 100 - byte ICMP Echos to 2000:777:111:1117::111, timeout is 2

seconds:

!!!!!


We need to repeat the same configuration on R2, but before we configure the summary route for R7s Loopback IPv6 addresses lets verify the routing table of R8:

On R8:

R8#Show ipv route ospf




H - NHRP, I1 - ISIS L1, I2 - ISIS L2, IA - ISIS in terarea





ld - LISP dyn - EID, a Application


OI 17::/64 [110/3]


OI 27::/64 [110/2]


OI 2000:111:111:1110::/62 [110/4]

via FE80::2, GigabitE thernet0/0

OI 2000:777:111:1110::/64 [110/3]


OI 2000:777:111:1117::/64 [110/3]


OI 2000:777:111:111A::/64 [110/3]


OI 2000:777:111:111E::/64 [1 10/3]


On R2:

R2(config)# ipv6 router ospf 1

R2(config - rtr)# Area 0 range 2000:777:111:1110::/60


On R8:

R8#Show ipv route ospf


Codes: C - Connect ed, L - Local, S - Static, U - Per - user Static route








OI 1 7::/64 [110/3]


OI 27::/64 [110/2]


OI 2000:111:111:1110::/62 [110/4]


OI 2000:777:111:1110::/60 [110/3]


R8#Ping 2000:777:111:1117::111



Sending 5, 100 - byte ICMP Echos to 2000:777:111:1117::111, timeout is 2

seconds:

!!!!!


Task 4

Summarize the external routes redistributed on R8. If this is done based on the policy, the rest of the routers should see a single summary route for the four networks redistributed into OSPF routing domain.

Lets look at the IPv6 addresses that we are going to summarize:

Lo0 - 2000:888:111:111 B::111/64

Lo1 - 2000:888:111:111 C::111/64

Lo2 - 2000:888:111:111 D::111/64

Lo3 - 2000:888:111:111 F::111/64

Lets configure the last digit of the forth Hextet to binary:

B 1 0 1 1

C 1 1 0 0

D 1 1 0 1

F 1 1 1 1

Therefore, the summary route should be 2000:888:111:1118::/61. Lets configure and verify:

On R8:

In OSPFv2, we use Area range command for internal routes and Summary-address for summarizing external routes. In OSPFv3, we still use the Area range command for internal routes, but for external routes instead of Summary-address command the Summary-prefix command is used. R8(config)# router ospfv3 1


R8(config - router - af)# Summary- prefix 2000:888:111:1118::/61



On R1:

R1#Show ipv6 route ospf | Inc /61

OE2 2000:888:111:1118::/61 [110/20]

R1#Ping 2000:888:111:111f::111


Sending 5, 100 - byte ICMP Echos to 2000:888:111:111F::111, timeout is 2

seconds:

!!!!!


Task 5

The policy for summarizing external routes has changed, the routers in area 2 should see all specific external routes whereas, the routers in the other areas should see a single summary route for the four external routes.

Lets remove the Summary-prefix configured in the previous step:

On R8:



R8(config - router - af)# No summary- prefix 2000:888:111:1118: :/61


On R1: R1#Show ipv6 route ospf | Inc /61

R1#

R1#Show ipv6 route ospf | Inc OE2


OE2 2000:888:111:111B::/64 [110/20]

OE2 2000:888:111:111C::/64 [110/20]


OE2 2000:888:111:111D::/64 [110/20]

OE2 2000:888:111:111F::/64 [110/20]

Note: Summarization in OSPFv3 is identical to OSPFv2; there are two routers where the summarization can be configured:

The routes are internal: If the routes are internal, the summarization can only be configured on the ABRs using the Area range command.

The routes are external: There are two types of external routes, the E routes or the N routes. When it comes to N routes, they can ONLY be summarized on the ASBR/s, but if the routes are E routes, they can be summarized on the router that originates them using the summary-prefix command. Since the routers in area 2 should see all the specific routes and the routers in the other areas should only see a single summary route, area 2 is converted into an NSSA area, once that happens, R2 will receive the N routes, and it will originate E routes. Since R2 is the one that originates the external E routes, it can summarize the routes redistributed by R8.

On R8:



R8(config - router - af)# Area 2 NSSA

You should see the following console message stating that the adjacency to R2 is down. This is because the area stub flag no longer matches, once R2 is configured with Area 2 NSSA, the area stub flag will match (They will both be in NSSA area) and the adjacency will be reestablished.

%OSPFv3- 5- ADJCHG: Process 1, IPv6, Nbr 0.0.0.2 on GigabitEthernet0/0

from FULL to DOWN, Neighbor Down: Adjacency forced to reset

On R2:


R2(config - rtr)# Area 2 NSSA

R2(config - rtr)# Summary- prefix 2000:888:111:1118::/61

You should see the following console message stating that the adjacency with 0.0.0.8 or R8 is in FULL state:

%OSPFv3- 5- ADJCHG: Process 1, Nbr 0.0.0.8 on FastEthernet0/0 from LOADING

to FULL, Loading Done



On R1: R1#Show ipv6 route ospf | Inc /61

OE2 2000:888:111:1118::/61 [110/20]

R1#Ping 2000:888:111:111f::111


Sending 5, 100 - byte ICMP Echos to 2000:888:111:111F::111, timeout is 2

seconds:

!!!!!


Task 6

None of the routers should have a discard route in their routing table.

In OSPF, the discard-route/s are auto-injected on the router that configured the summarization. Lets verify the existence of the discard routes on R7 and R2:

On R2:







l - LISP



OI 17::/64 [110/2]


OI 2000:111:111:1110::/62 [110/3]

via FE80::7, FastEthernet0/ 1

O 2000:777:111:1110::/60 [110/0]



O 2000:777:111:1110::/64 [110/2]


O 2000:777:111:1117::/64 [110/2]


O 2000:777:111:111A::/64 [110/2]

via F E80::7, FastEthernet0/1

O 2000:777:111:111E::/64 [110/2]


O 2000:888:111:1118::/61 [110/0]


ON2 2000:888:111:111B::/64 [110/20]

via 28::8, FastEthernet0/0

ON2 2000:888:111:111C::/6 4 [110/20]


ON2 2000:888:111:111D::/64 [110/20]


ON2 2000:888:111:111F::/64 [110/20]


The output of the above show command reveals that R2 has two discard-routes, the 2000:777:111:1110::/60, which is the discard-route for internal networks within Area 0, and 2000:888:111:1118::/61 which is the discard-route for external networks. Lets remove the discard-route for the internal routes:


R2(config - rtr)# No discard - route internal

To verify this configuration:

On R2:







l - LISP



OI 17::/64 [110/2]


OI 2000:111:111:1110::/62 [110/3]



O 2000:777:111:1110::/64 [110/2]


O 2000:777:111:1117::/64 [110/2]


O 2000:777:111:111A::/64 [110/2]


O 2000:777:111:111E::/64 [110/2]


O 2000:888:111:1118::/61 [110/0]

via Null0, d irectly connected

ON2 2000:888:111:111B::/64 [110/20]


ON2 2000:888:111:111C::/64 [110/20]


ON2 2000:888:111:111D::/64 [110/20]


ON2 2000:888:111:111F::/64 [110/20 ]


We can see that the discard-route for internal networks is removed, lets remove the discard-route for the external routes:


R2(config - rtr)# No Discard - route external

To verify this configuration:

On R2:







l - LISP



OI 1 7::/64 [110/2]


OI 2000:111:111:1110::/62 [110/3]


O 2000:777:111:1110::/64 [110/2]



O 2000:777:111:1117::/64 [110/2]


O 2000:777:111:111A::/64 [110/2]


O 2000:777:111:111E::/64 [110/2]


ON2 2000:888:111:111B::/64 [110/20]


ON2 2000:888:111:111C::/64 [110/20]

via 28:: 8, FastEthernet0/0

ON2 2000:888:111:111D::/64 [110/20]


ON2 2000:888:111:111F::/64 [110/20]


Now, lets remove the discard-route on R7:

On R7:











OI 28::/64 [110/2]


O 2000:111:111:1110::/62 [110/2]


O 2000:111:111:1110::/64 [110/2]


O 2000:111:111:1111::/6 4 [110/2]


O 2000:111:111:1112::/64 [110/2]


O 2000:111:111:1113::/64 [110/2]


O 2000:777:111:1110::/60 [110/1]

via Null0, directly conne cted

OE2 2000:888:111:1118::/61 [110/20]



Since both discard routes are for internal networks, they can be removed using a single command:



R7(con fig - router - af)# No discard - route internal


On R7:











OI 28::/64 [110/2]


O 2000:111:111:1110::/64 [110/2]


O 2000:111:111:1111::/64 [110/2]


O 2000:111:111:1112::/64 [110/2]


O 2000:111:111:1113::/64 [110/2]


OE2 200 0:888:111:1118::/61 [110/20]


Task 7

Erase the startup configuration of the routers, config.text and the VLAN.dat of the switches and reload them before proceeding to the next lab.

Documents

Ospfv3 Lab 2