[c-nsp] EIGRP Adversing Problem

[Oliver Boehmer (oboehmer)]

Jason Lixfeld <mailto:jason at lixfeld.ca> wrote on Tuesday, October 26,
2004 8:54 PM:

> On 26-Oct-04, at 1:59 PM, Oliver Boehmer ((oboehmer)) wrote:
> 
>> Jason Lixfeld <> wrote on Tuesday, October 26, 2004 7:38 PM:
>> 
>>> Use the eigrp router passive-interface command.
>>> 
>> 
>> passive-interface will only prevent an EIGRP adjacency being formed
>> over
>> this link, the link address will still be advertised.. the only way
>> to prevent this from happening was mentioned by Bruce earlier :
> 
> Right.  I thought there was some context missing from the original
> email so it was subject to some assumptions.  My assumption were
> sorta' 
> like so:
> 
> !
> interface Loopback6969
>   ip address 169.254.0.1 255.255.255.0
> interface Tunnel1
>   ip address 192.168.0.5 255.255.255.252
> interface Tunnel2
>   ip address 192.168.0.22 255.255.255.252
> interface Tunnel3
>   ip address 192.168.0.1 255.255.255.252
> router eigrp 6969
>   passive-interface default
>   no passive-interface Tunnel1
>   no passive-interface Tunnel2
>   no passive-interface Tunnel3
>   network 192.168.0.0
>   network 192.168.100.0
>   no auto-summary
> !
> 
> 169.254.0.0/24 is connected, but the interface is passive and it is
> not redistributed via connected.  Therefore, it is not redistributed
> period.

ACK.

>> In halfway modern code (at least 12.2 and later, I think 12.1 as
>> well) you can use "network <network> <wildcard>" to exactly specify
>> the interfaces' addresses which you want to be covered by EIGRP..
>> works similar to the way you setup OSPF..
> 
> In the above scenario, had the statement network 169.254.0.0 been
> present in the configuration, the route would have been redistributed,
> regardless as to whether or not the interface was passive, but what
> about if redistribute connected was turned on?  You wouldn't need the
> network statement in that case, right?
 
correct. redistribute connected advertises all connected networks,
regardless of whether they are covered by "network" statements in the
eigrp config.

	oli