07-10-2015 10:32 AM - edited 03-05-2019 01:51 AM
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
07-10-2015 10:53 AM
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
07-10-2015 11:39 AM
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.
07-10-2015 12:14 PM
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
07-10-2015 12:22 PM
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
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