RE: BGP default network

From: Brian S turner (brian@xxxxxxxxxxxxxxxxx)
Date: Tue Aug 15 2000 - 10:14:23 GMT-3


   
Thanks Mark and Christopher for clearing this up. Very usefull info for
real world, which makes it very unlikely to be on the lab.

Brian

-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
Christopher Van Heuveln
Sent: Tuesday, August 15, 2000 7:06 AM
To: Mark H. Degner
Cc: ccielab@groupstudy.com
Subject: Re: BGP default network

On Mon, Aug 14, 2000 at 08:54:40PM -0500, Mark H. Degner wrote:
> Brian,
>
> BGP CAN generate a default route. Note the 'default-information
originate' command that is

Mark,

I may be taking your statement out of context but let me clarify it anyway.
BGP "default-info originate" does not work the same as with some of the
other routing protocols. BGP will not *create* a default route just because
you use this command (like OSPF can do). There are two ways to get a
default route into the BGP RIB:

1.

router bgp 1
  redist <protocol>
  default-information originate

  (if you leave either statement out it will not go in the RIB)

2.

router bgp 1
  network 0.0.0.0 <-- puts it in the RIB *and* advertises it

But both methods require you to have a 0.0.0.0 route already in
the local routing table.

Chris



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