"What do you mean: You might confirm that this VLAN isn't seeing a GLBP hello from any other VLAN. I.e., confirm there isn't any possible leakage between VLANs. "
I mean you should verify your topology to insure that VLANs and subnets don't (unexpectedly) share the same wire. Unlikely, but I see you're using secondary addressing which is unusual when you have VLAN support. (I.e. normally would expect your two subnets to be in their own VLANs.)
"And how will I do that? "
Perhaps activate debug for GLBP and see what GLBP packets you're receiving. Confirm they're from the neighbor you expect.
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...