We have some 6009 access switches, dual homed to 2 6509 (with MSFC1) distrbution switches. We have 14 VLANs defined on the switches. All the odd VLANs have distrbution switch 1(DS1) as the root , and all the even VLANs have distrbution 2(DS2) as the root, we are running HSRP between the MSFCs, where also odd VLANs are active on router 1 and even are standby, and even VLANs are active on router 2 and standby on router 1. We have this setup in more than 100 locations. But on one of the location we are getting HSRP flapping, where all the even VLANs go to active state then go back to standby again, that happens on 1 VLAN at a time every couple of hours.. No messages on router 2 or on the DSs.. Here's the log on router 1. You can see from the log that we are getting this message every 1/2 hour, but some time it stops for 7-8 hours. We ran a script to check the utilization on the routers may be we are getting some peaks causing that, but we found no peaks.
Switches are running CatOs 5.4.4
Routers (MSFC) are runnung 12.1.2E
Jul 14 19:33:00.201 EDT: %STANDBY-6-STATECHANGE: Standby: 10: Vlan10 state Standby -> Active
Jul 14 19:33:00.201 EDT: %STANDBY-6-STATECHANGE: Standby: 10: Vlan10 state Active -> Speak
We are pleased to announce availability of Beta software for 16.6.3.
16.6.3 will be the second rebuild on the 16.6 release train targeted
towards Catalyst 9500/9400/9300/3850/3650 switching platforms. We are
looking for early feedback from customers befor...
Introduction Featured Speakers Luis Espejel is the Telecommunications
Manager of IENova, an Oil & Gas company. Currently he works with Cisco
IOS® and Cisco IOS XE platforms, and NX to some extent. He has also
worked as a Senior Engineer with the Routing P...
In this session you can learn more about Layer 3 multicast and the best
practices to identify possible threats and take security measures. It
provides an overview of basic multicast, the best security practices for
use of this technology, and recommendati...