[c-nsp] eigrp split horizon with SRP (multicast broke on 7200)

[Josh Duffek]

Sorry I should have replied to the list earlier.  Didn't have all the
info I should have on the original email.

Basically our 7200s have some (hw-ish?) bug that kills local multicast
traffic.  So we have static neighbor statements...which is what causes
the problem.

Unfortunately I cannot find the bug(no topic :( )  Does anyone have the
ddts number handy for that by any chance?  It's been a year since anyone
here has looked into it and I'd like to get the stuff setup
right...hoping there might be a fix for it now.

IOS (tm) 7200 Software (C7200-JS-M), Version 12.2(10b), RELEASE SOFTWARE
(fc1)
Slot 0: C7200-I/O-2FE/E
Slot 1/2: PA-SRP-OC12SMI
Slot 4: PA-MC-8T1

Thanks,

josh duffek    network engineer
consultantjd16 at ridemetro.org
desk:              713-739-4849
mobile:            713-291-2365

> -----Original Message-----
> From: Michael Smith [mailto:mksmith at noanet.net]
> Sent: Wednesday, October 20, 2004 3:55 PM
> To: Josh Duffek; cisco-nsp at puck.nether.net
> Cc: cisco-rp at external.cisco.com
> Subject: RE: [c-nsp] eigrp split horizon with SRP
> 
> 
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
> 
> Have you looked at the "ip split-horizon eigrp <as number>"
> sub-command for the SRP interface?  If you are having difficulties
> you may wish to look at OSPF which works quite will in an SRP
> environment with just a few commands.
> 
> Mike
> 
> > -----Original Message-----
> > From: cisco-nsp-bounces at puck.nether.net [mailto:cisco-nsp-
> > bounces at puck.nether.net] On Behalf Of Josh Duffek
> > Sent: Monday, October 18, 2004 8:36 AM
> > To: cisco-nsp at puck.nether.net
> > Cc: cisco-rp at external.cisco.com
> > Subject: [c-nsp] eigrp split horizon with SRP
> >
> > Here is a snippet of my topology:
> >
> >
> >          /------[Main]
> >         /       /    \
> >        /       /      \
> >     (t1)    (oc48)     \
> >      \      /   \      (t1)
> >       \    /     \      /
> >        \  /       \    /
> >       [site1]   [site2]
> >          \_______/
> >
> > So, each of my sites has a connection on the ring and a t1 for
> > backup. Because of split horizon the routes I RX on my SRP don't
> > get sent back out...so for site-to-site traffic the remotes send
> > that stuff out of the T interfaces.  For right now it is not a
> > major problem as it is enough bandwidth to cover...but if the T
> > goes down then I am hosed.
> >
> > Obviously I could disable split horizon and it might all be
> > peachy...but before I do that I figured I'd run this by you guys to
> > see if there wasn't another alternative.  I couldn't find anything
> > about p2p
> > subinterfaces with SRP or anything like that...is there anything I
> > can do besides disable SH?
> >
> > Sorry I'm opti-clueless and haven't done a whole lot of RP
> > lately...so any help would be much appreciated.
> >
> > Thanks,
> >
> > josh duffek    network engineer
> > consultantjd16 at ridemetro.org
> > desk:              713-739-4849
> > mobile:            713-291-2365
> >
> >
> > _______________________________________________
> > 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/
> 
> 
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