We have been upgrading our infrastructure and replacing some older 10/100 switches with 10/100/1000. The original switches are mainly C3560-48 switching. The new switches we are installing are C3650-48TS-S switches. There was a couple items we noticed which we were able to resolve via a TAC case which was the duplicate IP issue. This was resolved by adding the following command to ALL ports.
ip device tracking maximum 0
The issue we seem to be running into now is one area of enterprise uses Multicast so we put them in their own separate, routable VLAN. Well since we began replacing our switching we have run into some odd errors. This department now has some uplinks using the older 3560 v12.2 IOS switches and some using the newer 3650 v15 IOS. We are thinking there might be some changes particularly with Multicast from the older IOS to the newer IOS which might be causing this issue. The problem is, when we deployed the original switches we just ran with the default Multicast configuration. We didn’t specify any settings.
My question is this. Has anyone else run into this issue with Multicast not working correctly when some users are on 12.2 IOS and others on 15 IOS?
I tried looking for documentation listing the difference in default Multicast configurations between the two IOS versions but came up empty handed. Any assistance with this is greatly appreciated!
This is the Show Multicast output on one of our 3560 switches.
Multicast Routing: disabled
Multicast Multipath: disabled
Multicast Route limit: No limit
Multicast Triggered RPF check: enabled
Multicast Fallback group mode: Sparse
This is the show Multicast on our newer 3650 switches.
Multicast Routing: disabled
Multicast Multipath: disabled
Multicast Route limit: No limit
Multicast Fallback group mode: Sparse
Number of multicast boundaries configured with filter-autorp option: 0
