Re: Pretty cool/unexpected behavior in IOS...

This sounds more like a bug than a feature :)
The distribute might have a handle on "the other router protocol" and
when you remove it, it does not clean all references...
Then you plug in a new proto and you have a reference to the new one.

One way to know with a higher degree of certainty would be to have 3
protos, add a distribute, then remove 2 and add another 2.
Chances are, the distribute will appear after adding the last...

-Carlos (a programmer point of view :)

Modular @ 18/04/2009 18:23 -0200 dixit:
> So I'm playing with distribute-lists today and decided to test how it worked
> with redistribution.
>
> I set up OSPF on one side and EIGRP the other and redistributed my EIGRP
> routes into ospf.
> I set up the distribute-list (#) out ospf 1 command to deny one of the 3
> routes being redistributed
> into ospf. Unfortunately, I couldn't get it to work and all of the EIGRP
> routes were still redistributed
> into OSPF.
>
> Frustrated, I decided to replace OSPF with RIP. I did "no router ospf 1" on
> all routers that had it
> and then configured RIP on them. When I did a show run on the redistributon
> router I noticed that
> the IOS already converted my distribute-list out ospf command to
> distribute-list out rip -ON IT'S OWN.
> I went back and forth between replacing RIP with OSPF and OSPF with RIP and
> every time the IOS
> modified the distribute-list out (IGP) on its own. Weird thing is, when I
> just removed the protocol,
> (to where neither RIP or OSPF was present), the IOS removed the
> distribute-list out (IGP) command
> altogether.... but after 10 minutes, when I added RIP, there was the
> distribute-list out command again
> all on its own.
>
> I scrolled through the buffer in secure-crt to get the old config:
>
> Before:
>
> router eigrp 1
> network 150.50.21.0 0.0.0.255
> distribute-list 10 out ospf 1
> no auto-summary
>
> After:
>
> router eigrp 1
> network 150.50.21.0 0.0.0.255
> distribute-list 10 out rip
> no auto-summary
>
> Try it yourself....
>
> Bryan R.
>
>
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-- 
Carlos G Mendioroz  <tron_at_huapi.ba.ar>  LW7 EQI  Argentina
Blogs and organic groups at http://www.ccie.net