Course:
CCNP ENARSI Labs
The commands to verify traditional OSPFv3 and OSPFv3 with AF may differ. This is because OSPFv3 with AF commands include information for both IPv4 and IPv6 address families, whereas traditional OSPFv3 is for IPv6 only.
a. Use the show ipv6 ospf neighbor command on D1 to display OSPFv3 neighbors. This is a command used for routers configured with traditional OSPFv3. The equivalent command for OSPFv2 would be show ip ospf neighbor.
D1# show ipv6 ospf neighbor
OSPFv3 Router with ID (1.1.1.2) (Process ID 123)
Neighbor ID Pri State Dead Time Interface ID Interface 1.1.1.1 1 FULL/DR 00:00:39 6 GigabitEthernet0/1
|
b. This same command on a router running OSPFv3 with AF would generate similar output. For example, on R1 issue the same show ipv6 ospf neighbor command. Notice the output is only OSPFv3 for the IPv6 AF.
R1# show ipv6 ospf neighbor
OSPFv3 Router with ID (1.1.1.1) (Process ID 123)
Neighbor ID Pri State Dead Time Interface ID Interface 2.2.2.1 1 FULL/BDR 00:00:31 5 GigabitEthernet0/0 1.1.1.2 1 FULL/BDR 00:00:38 471 GigabitEthernet0/1
|
c. Now, issue the show ospfv3 neighbor command on R1. This is a command used for routers configured for OSPFv3 with AF. Notice the output includes neighbors for both IPv4 and IPv6 address families.
R1# show ospfv3 neighbor
OSPFv3 123 address-family ipv4 (router-id 1.1.1.1)
Neighbor ID Pri State Dead Time Interface ID Interface 2.2.2.1 1 FULL/BDR 00:00:38 5 GigabitEthernet0/0
OSPFv3 123 address-family ipv6 (router-id 1.1.1.1)
Neighbor ID Pri State Dead Time Interface ID Interface 2.2.2.1 1 FULL/BDR 00:00:32 5 GigabitEthernet0/0 1.1.1.2 1 FULL/BDR 00:00:30 471 GigabitEthernet0/1
|
Traditional OSPFv3 commands are similar to those for OSPFv2, except ipv6 is used as an argument instead of ip, for example show ip ospf neighbor and show ipv6 ospf neighbor. OSPFv3 with AF uses the argument ospfv3 which includes both OSPF for IPv4 and IPv6 AFs. For example, show ospfv3 neighbor.
Traditional OSPFv3 commands can be used when a router is configured for OSPFv3 with AF, but the OSPFv3 AF router will only show OSPF for IPv6 AF information. OSPFv3 with AF commands cannot be used on routers configured with traditional OSPFv3.
To summarize the show command arguments:
Why does the show ipv6 ospf neighbor command only display OSPFv3 neighbors in the IPv6 AF?
Type your answers here.
The show ipv6 ospf neighbor command is used to display OSPFv3 neighbor adjacencies, specifically for IPv6 indicated by the ipv6 keyword in the command. The router ID 1.1.1.6 and 3.3.3.6 are associated with the IPv6 AF.
a. Use the show ipv6 route ospf command on D1 to display OSPFv3 routing entries in the IPv6 routing table.
D1# show ipv6 route ospf IPv6 Routing Table – default – 9 entries Codes: C – Connected, L – Local, S – Static, U – Per-user Static route B – BGP, R – RIP, H – NHRP, I1 – ISIS L1 I2 – ISIS L2, IA – ISIS interarea, IS – ISIS summary, D – EIGRP EX – EIGRP external, ND – ND Default, NDp – ND Prefix, DCE – Destination NDr – Redirect, RL – RPL, O – OSPF Intra, OI – OSPF Inter OE1 – OSPF ext 1, OE2 – OSPF ext 2, ON1 – OSPF NSSA ext 1 ON2 – OSPF NSSA ext 2, la – LISP alt, lr – LISP site-registrations ld – LISP dyn-eid, lA – LISP away, le – LISP extranet-policy OI 2001:DB8:ACAD:2001::/64 [110/4] via FE80::1:1, GigabitEthernet0/1 OI 2001:DB8:ACAD:2002::/64 [110/5] via FE80::1:1, GigabitEthernet0/1 OI 2001:DB8:ACAD:A001::/64 [110/2] via FE80::1:1, GigabitEthernet0/1 OI 2001:DB8:ACAD:A002::/64 [110/3] via FE80::1:1, GigabitEthernet0/1 |
Display the routes using the show ip route ospf. Why are there no routes displayed using this command?
Type your answers here.
D1 is in an IPv6-only area. D1 is only implementing traditional OSPFv3 for IPv6 and has not been configured for OSPFv2 for IPv4.
b. Understanding the difference between commands associated with OSPFv2 and OSPFv3 can seem challenging at times. The show ip route ospfv3 command is used to view OSPFv3 routes in the IPv4 routing table. The show ipv6 route ospf command is used to view OSPFv3 routes in the IPv6 routing table. The show ipv6 route ospf command is the same command used with traditional OSPFv3 for IPv6.
| R1# show ip route ospf |
R1# show ip route ospfv3 Codes: L – local, C – connected, S – static, R – RIP, M – mobile, B – BGP D – EIGRP, EX – EIGRP external, O – OSPF, IA – OSPF inter area N1 – OSPF NSSA external type 1, N2 – OSPF NSSA external type 2 E1 – OSPF external type 1, E2 – OSPF external type 2 i – IS-IS, su – IS-IS summary, L1 – IS-IS level-1, L2 – IS-IS level-2 ia – IS-IS inter area, * – candidate default, U – per-user static route o – ODR, P – periodic downloaded static route, H – NHRP, l – LISP a – application route + – replicated route, % – next hop override, p – overrides from PfR
Gateway of last resort is not set
10.0.0.0/8 is variably subnetted, 4 subnets, 3 masks O IA 10.10.4.0/30 [110/3] via 172.16.0.1, 00:17:34, GigabitEthernet0/0 O IA 10.10.5.0/24 [110/4] via 172.16.0.1, 00:17:34, GigabitEthernet0/0 172.16.0.0/16 is variably subnetted, 3 subnets, 2 masks O 172.16.1.0/30 [110/2] via 172.16.0.1, 00:17:34, GigabitEthernet0/0
|
R1# show ipv6 route ospfv3 ^ % Invalid input detected at ‘^’ marker.
|
R1# show ipv6 route ospf IPv6 Routing Table – default – 9 entries Codes: C – Connected, L – Local, S – Static, U – Per-user Static route B – BGP, R – RIP, H – NHRP, I1 – ISIS L1 I2 – ISIS L2, IA – ISIS interarea, IS – ISIS summary, D – EIGRP EX – EIGRP external, ND – ND Default, NDp – ND Prefix, DCE – Destination NDr – Redirect, RL – RPL, O – OSPF Intra, OI – OSPF Inter OE1 – OSPF ext 1, OE2 – OSPF ext 2, ON1 – OSPF NSSA ext 1 ON2 – OSPF NSSA ext 2, a – Application O 2001:DB8:ACAD:1002::/64 [110/2] via FE80::D1:2, GigabitEthernet0/1 OI 2001:DB8:ACAD:2001::/64 [110/3] via FE80::2:1, GigabitEthernet0/0 OI 2001:DB8:ACAD:2002::/64 [110/4] via FE80::2:1, GigabitEthernet0/0 O 2001:DB8:ACAD:A002::/64 [110/2] via FE80::2:1, GigabitEthernet0/0
|
Why doesn’t the show ip route ospf command display any routes on R1?
Type your answers here.
The show ip route ospf command is used to display OSPFv2 routes in the IPv4 routing table. R1 is implementing OSPFv3.
a. D1 is running traditional OSPFv3. The show ipv6 ospf database command is used to display a summary of the OSPFv3 LSDB.
D1# show ipv6 ospf database
OSPFv3 Router with ID (1.1.1.2) (Process ID 123)
Router Link States (Area 1)
ADV Router Age Seq# Fragment ID Link count Bits 1.1.1.1 1096 0x80000009 0 1 B 1.1.1.2 1110 0x80000005 0 1 None
Net Link States (Area 1)
ADV Router Age Seq# Link ID Rtr count 1.1.1.1 1152 0x80000001 6 2
Inter Area Prefix Link States (Area 1)
ADV Router Age Seq# Prefix 1.1.1.1 1096 0x80000003 2001:DB8:ACAD:A001::/64 1.1.1.1 1096 0x80000003 2001:DB8:ACAD:A002::/64 1.1.1.1 833 0x80000005 2001:DB8:ACAD:2001::/64 1.1.1.1 1497 0x80000002 2001:DB8:ACAD:2002::/64
Link (Type-8) Link States (Area 1)
ADV Router Age Seq# Link ID Interface 1.1.1.2 1150 0x80000001 39 Gi1/0/23 1.1.1.1 1096 0x80000006 6 Gi1/0/11 1.1.1.2 1151 0x80000001 38 Gi1/0/11
Intra Area Prefix Link States (Area 1)
ADV Router Age Seq# Link ID Ref-lstype Ref-LSID 1.1.1.1 1152 0x80000001 6144 0x2002 6 1.1.1.2 1150 0x80000003 0 0x2001 0 |
b. R1 is running OSPFv3 with AF. The show ospfv3 database command is used to display a summary of the OSPFv3 LSDB for both the IPv4 and IPv6 AFs.
R1# show ospfv3 database
OSPFv3 123 address-family ipv4 (router-id 1.1.1.1)
Router Link States (Area 0)
ADV Router Age Seq# Fragment ID Link count Bits 1.1.1.1 532 0x80000005 0 1 None 2.2.2.1 508 0x80000008 0 2 None 3.3.3.1 507 0x80000006 0 1 B
Net Link States (Area 0)
ADV Router Age Seq# Link ID Rtr count 2.2.2.1 539 0x80000001 5 2 3.3.3.1 512 0x80000001 5 2
Inter Area Prefix Link States (Area 0)
ADV Router Age Seq# Prefix 3.3.3.1 553 0x80000001 10.10.4.0/30 3.3.3.1 513 0x80000001 10.10.5.0/24
Link (Type-8) Link States (Area 0)
ADV Router Age Seq# Link ID Interface 1.1.1.1 579 0x80000001 5 Gi0/0/0 2.2.2.1 579 0x80000001 5 Gi0/0/0
Intra Area Prefix Link States (Area 0)
ADV Router Age Seq# Link ID Ref-lstype Ref-LSID 2.2.2.1 539 0x80000001 5120 0x2002 5 3.3.3.1 512 0x80000001 5120 0x2002 5
Router Link States (Area 1)
ADV Router Age Seq# Fragment ID Link count Bits 1.1.1.1 602 0x80000001 0 0 None
OSPFv3 123 address-family ipv6 (router-id 1.1.1.1)
Router Link States (Area 0)
ADV Router Age Seq# Fragment ID Link count Bits 1.1.1.1 530 0x80000005 0 1 B 2.2.2.1 508 0x80000009 0 2 None 3.3.3.1 508 0x80000006 0 1 B
Net Link States (Area 0)
ADV Router Age Seq# Link ID Rtr count 2.2.2.1 539 0x80000001 5 2 3.3.3.1 511 0x80000001 5 2
Inter Area Prefix Link States (Area 0)
ADV Router Age Seq# Prefix 1.1.1.1 579 0x80000001 2001:DB8:ACAD:1001::/64 1.1.1.1 559 0x80000001 2001:DB8:ACAD:1002::/64 3.3.3.1 551 0x80000001 2001:DB8:ACAD:2001::/64 3.3.3.1 512 0x80000001 2001:DB8:ACAD:2002::/64
Link (Type-8) Link States (Area 0)
ADV Router Age Seq# Link ID Interface 1.1.1.1 578 0x80000002 5 Gi0/0/0 2.2.2.1 578 0x80000002 5 Gi0/0/0
Intra Area Prefix Link States (Area 0)
ADV Router Age Seq# Link ID Ref-lstype Ref-LSID 2.2.2.1 539 0x80000001 5120 0x2002 5 3.3.3.1 511 0x80000001 5120 0x2002 5
Router Link States (Area 1)
ADV Router Age Seq# Fragment ID Link count Bits 1.1.1.1 553 0x80000006 0 1 B 1.1.1.2 552 0x80000025 0 1 None
Net Link States (Area 1)
ADV Router Age Seq# Link ID Rtr count 1.1.1.2 560 0x80000001 38 2
Inter Area Prefix Link States (Area 1)
ADV Router Age Seq# Prefix 1.1.1.1 578 0x80000001 2001:DB8:ACAD:A001::/64 1.1.1.1 538 0x80000001 2001:DB8:ACAD:A002::/64 1.1.1.1 506 0x80000001 2001:DB8:ACAD:2002::/64 1.1.1.1 506 0x80000001 2001:DB8:ACAD:2001::/64
Link (Type-8) Link States (Area 1)
ADV Router Age Seq# Link ID Interface 1.1.1.1 559 0x8000000C 6 Gi0/0/1 1.1.1.2 598 0x80000002 38 Gi0/0/1
Intra Area Prefix Link States (Area 1)
ADV Router Age Seq# Link ID Ref-lstype Ref-LSID 1.1.1.2 481 0x80000016 0 0x2001 0 1.1.1.2 560 0x80000001 38912 0x2002 38 |
What would the show ipv6 route database command display on R1, if anything?
Type your answers here.
The show ipv6 ospf database command can also be used on R1, but it will only display OSPFv3 IPv6 AF information.
Google