Hi everybody.
I am trying to establish a virtual link between R3 and R2 so area 2 can connect to area 0 and R1 will learn R4's loopback prefix 2000::4/128.
Detail is given below:
R1--s0/0---area 0---s0/0-R2--s0/1--area 1---s0/1-R3--s0/0---area 2-----s0/0--R4
All the above routers's serial interfaces are configured with " ipv6 address autoconfig".
R1's id 1.1.1.1, R2's id 2.2.2.2, R3's id 3.3.3.3,R4's id 4.4.4.4
R4 has loopback address 2000::4/64.
R3 is learning 2000::4/128 from R4.
As expected, R1 is not learning this route because area 2 is not yet connected to it.
Now if we configure a virtual-link between R3 and R2 , R1 should know 2000::4
But for some reasons, R1 is not learning this route.
R3#show ipv6 route
IPv6 Routing Table - 4 entries
Codes: C - Connected, L - Local, S - Static, R - RIP, B - BGP
U - Per-user Static route, M - MIPv6
I1 - ISIS L1, I2 - ISIS L2, IA - ISIS interarea, IS - ISIS summary
O - OSPF intra, OI - OSPF inter, OE1 - OSPF ext 1, OE2 - OSPF ext 2
ON1 - OSPF NSSA ext 1, ON2 - OSPF NSSA ext 2
D - EIGRP, EX - EIGRP external
C 2000::/64 [0/0]
via ::, Loopback3
L 2000::3/128 [0/0]
via ::, Loopback3
O 2000::4/128 [110/64]
via FE80::C203:12FF:FEC0:0, Serial0/1
L FF00::/8 [0/0]
via ::, Null0
==============================
Below is the virtual-link configured at R3:
pv6 router ospf 1
router-id 3.3.3.3
log-adjacency-changes
area 1 virtual-link 2.2.2.2
!
Virtual-link configuration at R2:
ipv6 router ospf 1
router-id 2.2.2.2
log-adjacency-changes
area 1 virtual-link 3.3.3.3
!
Routing table at R1 is shown below:
R1#show ipv6 route
OI 2000::3/128 [110/128]
via FE80::C201:12FF:FEC0:0, Serial0/0
L FF00::/8 [0/0]
via ::, Null0
The prefix 2000::4/128 is missing even though virtual-link is configured between R2 and R3.
=======================================================================
Below I have pasted the configurations:
R1#show running-config
Building configuration.
ipv6 unicast-routing
multilink bundle-name authenticated
interface Serial0/0
no ip address
ipv6 address autoconfig
ipv6 ospf 1 area 0
clock rate 200000
!
ipv6 router ospf 1
router-id 1.1.1.1
log-adjacency-changes
===================================================
R2's config
R2#show running-config
Building configuration...
Current configuration : 1113 bytes
!
version 12.4
!
hostname R2
!
ipv6 unicast-routing
multilink bundle-name authenticated
!
interface Serial0/0
no ip address
ipv6 address autoconfig
ipv6 ospf 1 area 0
clock rate 2000000
interface Serial0/1
no ip address
ipv6 address autoconfig
ipv6 ospf 1 area 1
clock rate 2000000
ipv6 router ospf 1
router-id 2.2.2.2
log-adjacency-changes
area 1 virtual-link 3.3.3.3
================================================
R3's config:
R3#show running-config
Building configuration...
Current configuration : 1195 bytes
!
version 12.4
ipv6 unicast-routing
multilink bundle-name authenticated
!
interface Loopback3
no ip address
ipv6 address 2000::3/64
ipv6 ospf 1 area 1
!
!
interface Serial0/0
no ip address
ipv6 address autoconfig
ipv6 ospf 1 area 1
clock rate 2000000
!
interface Serial0/1
no ip address
ipv6 address autoconfig
ipv6 ospf 1 area 2
clock rate 2000000
!
ipv6 router ospf 1
router-id 3.3.3.3
log-adjacency-changes
area 1 virtual-link 2.2.2.2
==================================================================
R4's config:
R4#show running-config
Building configuration...
Current configuration : 1132 bytes
!
version 12.4
!
ipv6 unicast-routing
multilink bundle-name authenticated
interface Loopback14
no ip address
ipv6 address 2000::4/64
ipv6 ospf 1 area 2
!
interface Serial0/0
no ip address
ipv6 address autoconfig
ipv6 ospf 1 area 2
clock rate 2000000
!
!
ipv6 router ospf 1
router-id 4.4.4.4
log-adjacency-changes
=======================================================================================================
thanks and have a nice weekend.
