Dear Team,
We used two HWIC cards with this 2951 router and we had some problems after stacking those HWIC cards. First, we configured the router and saved them, but after we restart the router and check the router, we can see those stack ports are in a down status. So the router was re-configured and checked, but the problem was not solved.
Also, we use this router for multicast, but when we checked the multicast the feed didn't get through the HWIC ports. But when we check it with onboard ports the router received the feed, and also it worked with the HWIC card.
Please advise us about this issue.