Routing table does not remember networks (dynamic routing)(rip v2)(cisco)?

Question

I had to do a network in packet trancer using rip v2 routing protocol. The problem is that after I assign with an IP each of the router`s interfaces and I insert all the networks to be advertised, only one is remembered by the router.

I used the following lines (after the interface config)

router(config)#router rip
router(configured)#version 2
router(configured)#network 172.31.192.0
router(configured)#network 172.31.128.0
router(configured)#network 172.31.0.0
router(configured)#no auto-summary

when I use show ip protocols I get that it has rip v2 and only routes for networks 172.31.0.0

other routers act the same if I use the same config ... have I missed anything?

Answer 1

Your configuration is perfectly fine. To verify it, add another RIPv2 router, connect them together via the 172.31.192.0 subnet, and add loopbacks with IP addresses in the other subnets. Then check the other router's routing table, and you'll see the classless RIP routes are there.



I copied your config and added the following:



---------------------------------

!

interface Loopback0

ip address 172.31.128.1 255.255.255.0

!

interface Loopback1

ip address 172.31.0.1 255.255.255.0

!

interface FastEthernet0/0

ip address 172.31.192.1 255.255.255.0

duplex auto

speed auto

!

--------------------------



I then added a router to that fa0/0 port, made it a RIPv2 neighbor, and look at its RIP entries in the routing table:



Router#show ip route rip

172.31.0.0/24 is subnetted, 3 subnets

R 172.31.0.0 [120/1] via 172.31.192.1, 00:00:25, FastEthernet0/0

R 172.31.128.0 [120/1] via 172.31.192.1, 00:00:25, FastEthernet0/0

Answer 2

I thought this definition was quite concise: A routing table is a set of rules, often viewed in table format, that is used to determine where data packets traveling over an Internet Protocol (IP) network will be directed. All IP-enabled devices, including routers and layer 3 switches, use routing tables. To the guy below: Layer 3 Switches use routing tables, incorrect information updated.

Answer 3

Woah! Mr. Network+ dude i think this might be out of Yahoo Answer's league here. But it could be that you are only allowed one IP adress at your location. I don't know, just blurting out stuff.