[nsp] ebgp vs ebgp multihop

[HyunSeog Ryu]

You can specify ebgp-multihop syntax to avoid that.
Based on traceroute hop count, you can specify how many hop will be allowed for
multi-hop eBGP.
If you don't specify it, by default, it will be 255. 

Hyun

Everton da Silva Marques wrote:
> 
> On Wed, Mar 26, 2003 at 01:42:10PM +1100, Dmitri Kalintsev wrote:
> > On Tue, Mar 25, 2003 at 01:01:28PM +0100, Nipper, Arnold wrote:
> > > Simple rule: if you don't have to do it don't do it. I only came across
> > > multi-hop in the following situtations:
> > >
> > >  + direct hops are not capable of running bgp (or bgp with full tables)
> > >  + bundeling of links
> > >  + for monitoring purposes
> >
> > + Next hop rewrite to something non-directly-connected.
> 
> Also, it may be of note that:
> 
> One usually expects a BGP session to close and
> to withdraw routes when the underlying directly
> connected links fail.
> 
> Depending on the AS peering-topology and routing policy,
> a BGP multi-hop session could remain established
> through other path than the expected one
> (the directly connected network).
> 
> This issue does not exist for one-hop-BGP.
> 
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-- 
* This does not represent Norlight Telecommunications, and
does only represent my humble opinion.

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Hyunseog Ryu                   mailto:r.hyunseog at ieee.org
Senior Network Engineer/Applications Engineering
Norlight Telecommunications, Inc.
Living in Earth, and dreaming in the moon world.
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