[c-nsp] 7200 T1 Aggregator - ~30-40 LSA events/sec. Normal?

[Rodney Dunn]

debug ip ospf flood


You can configure ip ospf flood-reduction if all the routers
in the network support DC.


On Thu, Apr 27, 2006 at 04:33:12PM -0400, Matt Stockdale wrote:
> Hmm. It looks like when I took a tcpdump sample earlier, I managed to
> grab the LSA's for the static route during their normal retransmit. It
> looks like the ongoing flood of LSA's is coming from somewhere else, and
> being passed along. I'll keep investigating.
> 
> Matt
> 
> On Thu, 2006-04-27 at 14:50 -0400, Matt Stockdale wrote:
> > Folks -
> > 
> >   I've just noticed that our 7206VXR, NPE-400, 12.1.19(E1), is sending
> > out ~30-40 LSA packets per second on the ethernet port that is the only
> > link to our core. Now, this router runs 4 channelized T3 cards for T1
> > aggregation, and redistributes static and connected (85 and 44 routes,
> > repsectively). None of the downstream routers on the T1 are configured
> > for OSPF. (at least, they shouldn't be), and the circuits aren't
> > bouncing.
> > 
> >   A quick debug session shows that the LSA's are for the static and
> > connected routes. 
> > 
> >   Is this normal? I see that I can configure some LSA throttling, but
> > it's hard to figure out the right value to throttle at if I'm not sure
> > why this is happening in the first place.. 
> > 
> >   Flames pointing me to RTFM welcome, as long as the TFM is specified.
> > 
> > Thanks in advance,
> >   Matt
> > 
> > --
> > Matt Stockdale
> > Network Engineer
> > Logicworks
> > 
> >   
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> > 
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