EIGRP offset-list based on source IP and advertised network

[tato386]

I need to offset some networks based on what router advertised them.  Since I only need to offset some networks and not all I need the ability to not only define the router but also the subnet.  Furthermore, since I get updates from multiple routers on the same interface I can just offset everything coming in on one interface.  It seems like the ideal thing would be an extended list similar to this:

offset-list 150 in 1000 Gi0/0

access-list 150 permit ip host 1.1.1.1 192.168.1.0 0.0.0.255

Most documentation says that EIGRP supports extended lists for offset but it seems like in practice it does not work and I can't seem to get my router to take the command.

So what are my options here?

Thanks,

Diego

[Vinit Jain]

Hello Diego

how are you doing today?

Could you please share the IOS verison (show version | in image), the error message that you are getting when you apply the config.

Thanks

Vinit

[tato386]

I tried using named and number.  Results below.

System image file is "bootflash:/isr4300-universalk9.03.13.02.S.154-3.S2-ext.SPA.bin"
!
ip access-list extended Test
 permit ip host 1.1.1.1 192.168.36.0 0.0.0.255
!
access-list 160 permit ip host 1.1.1.1 192.168.36.0 0.0.0.255
!
4331(config-router)#offset-list Test in 2000 Tunnel1
Access-list type conflicts with prior definition
!

4331(config-router)#offset-list 160 in 2000 Tunnel1
% Invalid access list name.
 

[Vinit Jain]

Hello,

The first problem with ACL 160 is that the range is not supported.

R2(config-router)#offset-list ?
  <0-99>       Access list of networks to apply offset (0 selects all networks)
  <1300-1999>  Access list of networks to apply offset (extended range)
  WORD         Access-list name

Regarding the extended ACL (named) Test, You cannot use extended ACL. You will have to use Standard ACL Only.

R2(config)#ip access-list standard Test
R2(config-std-nacl)#permit 192.168.36.0 0.0.0.255
R2(config-std-nacl)#exi
R2(config)#router eigrp 100
R2(config-router)#offset-list Test in 2000 e0/1

So, you will have to decide upon how you want to use the ACL in offset-list.

Hope this helps.

Vinit

[tato386]

Vinit,

I  kinda already knew what you show above, I was hoping I was doing something wrong.  Can you suggest an alternative way of achieving the route offsets that I need to do?

Thanks,

Diego