IPv6 Routing : RIP example

30 July 201829 July 2018 / Simon

I’m using a basic configuration with single loopback on each or R1 and R2. R1 is configured using global prefix and R2 is using auto-config with no default…

IPv6 RIPng

A basic implementation similar to RIPv2.
Distance-Vector (Hops) and 15 is maximum (16 is infinity).
UDP Port 521 (as opposed to 520 of RIPv1/2).
Destination addresses of FF02::9.
Split Horizon, Hold Down timer (180s) and Poison Reverse same as IPV4 versions.
No RIPng authentication (handed off to IPv6 IPsec)

Below is an example of enabling RIPng, and verifying the Loopback appearing on the neighbour as a RIP route.

R1(config)#int lo 0
R1(config-if)#ipv6 rip PROCESS-NAME enable
R1(config-if)#int fa 0/0
R1(config-if)#ipv6 rip PROCESS-NAME enable
R1(config-if)#end

R2(config)#int lo 0
R2(config-if)#ipv6 rip PROCESS-NAME enable
R2(config-if)#int fa 0/0
R2(config-if)#ipv6 rip PROCESS-NAME enable
R2(config-if)#

R1#show ipv6 route
IPv6 Routing Table - default - 5 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, l - LISP
LC 2001:1111:1111::1/128 [0/0]
via Loopback0, receive
R 2001:2222::/64 [120/2]
via FE80::C802:4FF:FEA0:8, FastEthernet0/0
C 2001:9999:9999:CAFE::/64 [0/0]
via FastEthernet0/0, directly connected
L 2001:9999:9999:CAFE::1/128 [0/0]
via FastEthernet0/0, receive
L FF00::/8 [0/0]
via Null0, receive

R2#show ipv6 route
IPv6 Routing Table - default - 6 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, l - LISP
R 2001:1111:1111::1/128 [120/2]
via FE80::C801:56FF:FE00:8, FastEthernet0/0
C 2001:2222::/64 [0/0]
via Loopback0, directly connected
L 2001:2222::1/128 [0/0]
via Loopback0, receive
NDp 2001:9999:9999:CAFE::/64 [2/0]
via FastEthernet0/0, directly connected
L 2001:9999:9999:CAFE:C802:4FF:FEA0:8/128 [0/0]
via FastEthernet0/0, receive
L FF00::/8 [0/0]
via Null0, receive

Note: You can apply an offset list to an interface that will add that to the routes received before placing in the routing table.

R2(config)#int fa 0/0
R2(config-if)#ipv rip PROCESS-NAME metric-offset 13
R2(config-if)#end

R2#show ipv6 route
IPv6 Routing Table - default - 6 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, l - LISP
R 2001:1111:1111::1/128 [120/14]
via FE80::C801:56FF:FE00:8, FastEthernet0/0
C 2001:2222::/64 [0/0]
via Loopback0, directly connected
L 2001:2222::1/128 [0/0]
via Loopback0, receive
NDp 2001:9999:9999:CAFE::/64 [2/0]
via FastEthernet0/0, directly connected
L 2001:9999:9999:CAFE:C802:4FF:FEA0:8/128 [0/0]
via FastEthernet0/0, receive
L FF00::/8 [0/0]
via Null0, receive
R2#

Default Route

A default route can be set on the advertising interface and example also shows suppressing the component routes…

R2(config)#int fa 0/0
R2(config-if)#ipv rip PROCESS-NAME default-information originate

R1#show ipv route
IPv6 Routing Table - default - 6 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, l - LISP
R ::/0 [120/2]
via FE80::C802:4FF:FEA0:8, FastEthernet0/0
LC 2001:1111:1111::1/128 [0/0]
via Loopback0, receive
R 2001:2222::/64 [120/2]
via FE80::C802:4FF:FEA0:8, FastEthernet0/0
C 2001:9999:9999:CAFE::/64 [0/0]
via FastEthernet0/0, directly connected
L 2001:9999:9999:CAFE::1/128 [0/0]
via FastEthernet0/0, receive
L FF00::/8 [0/0]
via Null0, receive
R1#


R2#conf t
Enter configuration commands, one per line. End with CNTL/Z.
R2(config)#int fa 0/0
R2(config-if)#ipv rip PROCESS-NAME default-information originate on
R2(config-if)#ipv rip PROCESS-NAME default-information originate on?
% Unrecognized command
R2(config-if)#ipv rip PROCESS-NAME default-information originate ?
metric Default route metric
<cr>

R2(config-if)#ipv rip PROCESS-NAME default-information ?
only Advertise only the default route
originate Originate the default route
R2(config-if)#ipv rip PROCESS-NAME default-information only

R1#show ipv route
IPv6 Routing Table - default - 5 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, l - LISP
R ::/0 [120/2]
via FE80::C802:4FF:FEA0:8, FastEthernet0/0
LC 2001:1111:1111::1/128 [0/0]
via Loopback0, receive
C 2001:9999:9999:CAFE::/64 [0/0]
via FastEthernet0/0, directly connected
L 2001:9999:9999:CAFE::1/128 [0/0]
via FastEthernet0/0, receive
L FF00::/8 [0/0]
via Null0, receive
R1#


R2#show ipv6 rip
RIP process "PROCESS-NAME", port 521, multicast-group FF02::9, pid 120
     Administrative distance is 120. Maximum paths is 16
     Updates every 30 seconds, expire after 180
     Holddown lasts 0 seconds, garbage collect after 120
     Split horizon is on; poison reverse is off
     Default routes are generated
     Periodic updates 56, trigger updates 2
     Full Advertisement 0, Delayed Events 0
  Interfaces:
    FastEthernet0/0
    Loopback0
  Redistribution:
    None
R2#

Other Options

Other options and Poison Reverse are performed under the router RIP process…

R2(config)#ipv6 router rip PROCESS-NAME

R2(config-rtr)#poison-reverse
R2(config-rtr)#?
default Set a command to its defaults
distance Administrative distance
distribute-list Filter networks in routing updates
exit Exit from IPv6 routing protocol configuration mode
maximum-paths Forward packets over multiple paths
no Negate a command or set its defaults
poison-reverse Poison reverse updates
port Port and multicast address
redistribute Redistribute IPv6 prefixes from another routing protocol
split-horizon Split horizon updates
timers Adjust routing timers

R2#show ipv6 rip
RIP process "PROCESS-NAME", port 521, multicast-group FF02::9, pid 120
Administrative distance is 120. Maximum paths is 16
Updates every 30 seconds, expire after 180
Holddown lasts 0 seconds, garbage collect after 120
Split horizon is on; poison reverse is on
Default routes are generated
Periodic updates 78, trigger updates 2
Full Advertisement 0, Delayed Events 0
Interfaces:
FastEthernet0/0
Loopback0
Redistribution:
None

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