On Tue, 2014-02-18 at 18:14 -0500, Randy wrote: > The mac entry is only present on the active HSRP member... and the > flood traffic is coming from standby member, heading out all the > backup RSTP paths (blocked on the remote end).
This probably means that the standby member is receiving traffic from elsewhere that it forwards upon receiving it because it has a connected route. You should be able to tell from where it comes by looking at the source IP addresses. Make sure traffic from elsewhere (other VLANs, other routers) arrives at the HSRP primary device. Alternatively, that the traffic when forwarded into the VLAN flows in a way that makes both your core devices see the traffic. Regarding TCNs, which might still be relevant since not only trunk interface flaps can trigger them, take a look at the output from: show spanning-tree detail | include last change|executing And see if any VLANs (or instances) have changed recently and often. (P.S.: I can imagine one could suggest VSS as a solution to this problem, which would technically be correct. OTOH VSS might introduce other problems and/or be precluded for other reasons and it would not really cast any light on the actual problem.) -- Peter _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
