[c-nsp] OSPF point-to-point vs dr/bdr

[Shankar Vemulapalli (svemulap)]

Hopefully - the below URL should provide more info. and motivation
behind p2p support on LAN. 
http://www.ietf.org/internet-drafts/draft-ietf-isis-igp-p2p-over-lan-06.
txt

/Shankar 

-----Original Message-----
From: cisco-nsp-bounces at puck.nether.net
[mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of
sthaug at nethelp.no
Sent: Wednesday, August 20, 2008 10:44 AM
To: kratzers at pa.net
Cc: cisco-nsp at puck.nether.net
Subject: Re: [c-nsp] OSPF point-to-point vs dr/bdr

> > These are all good points, and makes me wonder - if it's *known* 
> > that an Ethernet link will be used as a point to point link between 
> > two routers, why doesn't everybody configure it explicitly as a
point to point link?
> > I know we always do...
>
> The benefit/cost ratio is low. You aren't saving much be eliminating 
> DR/BDR election, and it's just one more unnecessary tweak to keep
track of. IMHO.

Funny, we look at it exactly the opposite way. We're a service provider,
and a large majority of the Ethernet links where we run an IGP are point
to point links. So we have the point to point configuration as part of
our standard config template, nothing extra to keep track of.

Steinar Haug, Nethelp consulting, sthaug at nethelp.no

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