IPv6: changing the metric in RIPng

IPv6: changing the metric in RIPng

 ·         Let me configure RIPng between 2 routers

R1----fa0/0-------------------fa0/0-----R2

2001:12::1----------------------2001:12::2

·         R1’s Loopback0: 2001:1::1

·         R2’s loopback0: 2001:2::2

R1(config)#ipv6 router rip RIPng

R1(config-if)#do show run int fa0/0

Building configuration...

 

Current configuration : 137 bytes

!

interface FastEthernet0/0

 no ip address

 duplex auto

 speed auto

 ipv6 address 2001:12::1/64

 ipv6 enable

 ipv6 rip RIPng enable

end

 

R1(config-if)#do show run int loop0

Building configuration...

 

Current configuration : 92 bytes

!

interface Loopback0

 no ip address

 ipv6 address 2001:1::1/64

 ipv6 rip RIPng enable

end

 

R1(config-if)#

 

R2(config)#ipv6 router rip RIPng

 

R2#show run int fa0/0

Building configuration...

 

Current configuration : 137 bytes

!

interface FastEthernet0/0

 no ip address

 duplex auto

 speed auto

 ipv6 address 2001:12::2/64

 ipv6 enable

 ipv6 rip RIPng enable

end

 

R2#show run int loop0

Building configuration...

 

Current configuration : 92 bytes

!

interface Loopback0

 no ip address

 ipv6 address 2001:2::2/64

 ipv6 rip RIPng enable

end

 

R2#

 

R1(config-rtr)#do show ipv6 rou

IPv6 Routing Table - 8 entries

Codes: C - Connected, L - Local, S - Static, R - RIP, B - BGP

       U - Per-user Static route

       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

C   2001:1::/64 [0/0]

     via ::, Loopback0

L   2001:1::1/128 [0/0]

     via ::, Loopback0

R   2001:2::/64 [120/2]

     via FE80::C001:25FF:FE30:0, FastEthernet0/0

C   2001:12::/64 [0/0]

     via ::, FastEthernet0/0

L   2001:12::1/128 [0/0]

     via ::, FastEthernet0/0

L   FE80::/10 [0/0]

     via ::, Null0

L   FF00::/8 [0/0]

     via ::, Null0

R1(config-rtr)#

 

R2(config-if)#do show ipv6 route

IPv6 Routing Table - 9 entries

Codes: C - Connected, L - Local, S - Static, R - RIP, B - BGP

       U - Per-user Static route

       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

R   2001:1::/64 [120/2]

     via FE80::C000:25FF:FE30:0, FastEthernet0/0

C   2001:2::/64 [0/0]

     via ::, Loopback0

L   2001:2::2/128 [0/0]

     via ::, Loopback0

C   2001:12::/64 [0/0]

     via ::, FastEthernet0/0

L   2001:12::2/128 [0/0]

     via ::, FastEthernet0/0

C   2001:22::/64 [0/0]

     via ::, Loopback1

L   2001:22::22/128 [0/0]

     via ::, Loopback1

L   FE80::/10 [0/0]

     via ::, Null0

L   FF00::/8 [0/0]

     via ::, Null0

R2(config-if)#

 

Observations:

·         RIPng is configured between R1 and R2

·         R1 has advertised its loopback0 2001:1::1 into RIPng

·         R2 has advertised its loopback0 2001:2::2 into RIPng

·         Both the routers sees the other router’s loopback with metric 2.

 

·         Let me configure R1 so that it sees R2’s loopback with metric 6.

 

R1(config-if)#int fa0/0

R1(config-if)#ipv6 rip RIPng metric-offset 5

R1(config-if)#

 

R1#show ipv6 route

IPv6 Routing Table - 7 entries

Codes: C - Connected, L - Local, S - Static, R - RIP, B - BGP

       U - Per-user Static route

       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

C   2001:1::/64 [0/0]

     via ::, Loopback0

L   2001:1::1/128 [0/0]

     via ::, Loopback0

R   2001:2::/64 [120/6]

     via FE80::C001:25FF:FE30:0, FastEthernet0/0

C   2001:12::/64 [0/0]

     via ::, FastEthernet0/0

L   2001:12::1/128 [0/0]

     via ::, FastEthernet0/0

L   FE80::/10 [0/0]

     via ::, Null0

L   FF00::/8 [0/0]

     via ::, Null0

R1#