The problem state that R4 and DSW1 can't ping to R2's loopback IPV6 address (FEC0::2:2) or (Serial1/0.12's 2026::12:2).
Let's check from DSW1 first. Both failed as shown below.
DSW1#ping ipv6 2026::12:2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 2026::12:2, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)
DSW1#ping ipv6 FEC0::2:2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to FEC0::2:2, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)
------------------------------------------
Check R2's IPV6 address to be sure whether they are up or not.
R2#sh ipv6 int brief
FastEthernet0/0 [administratively down/down]
FastEthernet0/1 [administratively down/down]
Serial1/0 [up/up]
Serial1/0.12 [up/up]
FE80::CE00:4FF:FE4C:0
2026::12:2
Serial1/0.23 [up/up]
FE80::CE00:4FF:FE4C:0
2026::1:1
Serial1/1 [administratively down/down]
Serial1/2 [administratively down/down]
Serial1/3 [administratively down/down]
Loopback2 [up/up]
FE80::CE00:4FF:FE4C:0
FEC0::2:2
----------------------------------------
Check OSPF IPV6 neighbour using "sh ipv6 ospf neighbor". One neighbour found with R1 but not with R3.
R2#sh ipv6 ospf neighbor
Neighbor ID Pri State Dead Time Interface ID Interface
1.1.1.1 1 FULL/ - 00:00:37 13 Serial1/0.12
Check the interface configuration connected to R3 which is s1/0.23. No OSPV3 configuration has configured.
R2#sh run int s1/0.23
Building configuration...
Current configuration : 145 bytes
!
interface Serial1/0.23 point-to-point
ip address 10.1.1.5 255.255.255.252
ipv6 address 2026::1:1/122
frame-relay interface-dlci 203
end
To be sure, double check again in the interface connected with R1.
R2#sh run int s1/0.12
Building configuration...
Current configuration : 245 bytes
!
interface Serial1/0.12 point-to-point
ip address 10.1.1.2 255.255.255.252
ip ospf authentication message-digest
ip ospf message-digest-key 1 md5 nass
ipv6 address 2026::12:2/122
ipv6 ospf 6 area 12
frame-relay interface-dlci 201
end
-------------------------------------------------
Missing configuration is "ipv6 ospf 6 area 0" which is the one needed to configured to be in OSPF V3 area 0.
Let's configure in R1 and ping again from DSW1. As soon as correct configuration completed, R2 is formed neighbour with R3 as shown below.
R2(config)#interface Serial1/0.23
R2(config-subif)#ipv6 ospf 6 area 0
R2(config-subif)#^Z
R2#
*Mar 1 00:16:48.055: %OSPFv3-5-ADJCHG: Process 6, Nbr 3.3.3.3 on Serial1/0.23 from LOADING to FULL, Loading Done
*Mar 1 00:16:49.435: %SYS-5-CONFIG_I: Configured from console by console
R2#
Ping to R2 from DSW1 again as follow.
DSW1#ping ipv6 FEC0::2:2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to FEC0::2:2, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 72/109/156 ms
DSW1#ping ipv6 2026::12:2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 2026::12:2, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 52/83/108 ms
DSW1#
this is ggreat
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