From: Andrew Moriarty (amgroupstudy@hotmail.com)
Date: Sat Nov 22 2003 - 08:33:42 GMT-3
A few points:
BGP and OSPF need a router-id, and both support a router-id command. OSPF
uses it (sometimes) to choose the DR for a link. BGP uses it (eventually) to
break ties in best-path selection. Unless you are changing this behaviour,
why would you want to change the router id? It does show up in various
databases, so you might want to change it for better readability of a
display. I wouldn't configure a router-id command unless it was required by
a question; and even then I'd ask the procter.
I don't think EIGRP uses router-id at all- I may be wrong on that, and if I
am someone please correct me.
I always use the exact address/inverse mask combination, or the smallest I
can.
net 172.16.0.3 0.0.0.0 area 0
rather than
172.16.0.3 0.0.0.3 area 0
In eigrp I always advertise only one interface at a time, using the inverse
mask as well. This way I know exactly what I am advertising. The passive
interface command won't hurt in that situation, but it won't help either. I
believe both are correct.
am
>From: "Ronald van Dommelen" <Ronald.v.Dommelen@Nobel.NL>
>Reply-To: "Ronald van Dommelen" <Ronald.v.Dommelen@Nobel.NL>
>To: <ccielab@groupstudy.com>
>Subject: Lab questions
>Date: Wed, 19 Nov 2003 10:39:57 +0100
>
>Hi Gents,
>
>Thanks for replying to my latest questions. I'm preparing for a Lab
>event in Brussels soon and have some urgent questions (without breaking
>the NDA ofcourse)regarding router-id's. I know that their have been
>some discussions on it but I havn't seen a good answer on this ?
>
>Can someone tell me if router-id's are mandetory on BGP and EIGRP ? If
>you configure them in the lab will it be right or wrong ?
>
>Do I need to use in EIGRP the passive/no passive interface command if I
>only want to enable EIGRP on a serial interface when I'm using the more
>specific network statements that only matches the serial's ip range ?
>
>
>Thanks very much ...
>
>Best regards,
>
>Ronald van Dommelen
>
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