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

Rodney Dunn rodunn at cisco.com
Wed Aug 20 16:22:59 EDT 2008


Not sure. I didn't write it. ;)

>From a quick glance it seems to imply that type of behavior but
I'm not aware it was ever really done.

On Wed, Aug 20, 2008 at 07:42:13PM +0100, Paul Cosgrove wrote:
> I'm not sure I understand you there.  Do you mean that the intention
> behind the draft RFC was for some form of point-to-point configuration
> command on the interface, which would apply to all link state routing
> protocols?
> 
> Paul.
> 
> Rodney Dunn wrote:
> > There was a point to point configuration on the link itself and it
> > caused a bunch of platform forwarding problems once.
> > 
> > I wouldn't use that one. 
> > 
> > Note I'm not talking about the OSPF point to point control plane
> > configuration. 
> > 
> > Rodney
> > 
> > On Wed, Aug 20, 2008 at 07:43:51PM +0200, sthaug at nethelp.no wrote:
> >>>> 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
> >>
> >> _______________________________________________
> >> cisco-nsp mailing list  cisco-nsp at puck.nether.net
> >> https://puck.nether.net/mailman/listinfo/cisco-nsp
> >> archive at http://puck.nether.net/pipermail/cisco-nsp/
> > _______________________________________________
> > cisco-nsp mailing list  cisco-nsp at puck.nether.net
> > https://puck.nether.net/mailman/listinfo/cisco-nsp
> > archive at http://puck.nether.net/pipermail/cisco-nsp/
> > 
> 
> 
> -- 
> HEAnet Limited
> Ireland's Education & Research Network
> 5 George's Dock, IFSC, Dublin 1, Ireland
> Tel:  +353.1.6609040
> Web:  http://www.heanet.ie
> Company registered in Ireland: 275301
> 
> Please consider the environment before printing this e-mail.


More information about the cisco-nsp mailing list