Quick note that the equation has been changed in more recent IOS versions to 256KB per ! exclamation mark.

I'm having the *exact same problem.  Three different types of cards (WS-X6748-GE-TX, WS-X6716-10GE, WS-X6724-SFP) won't boot in slot 4 due to "Fabric channel errors", but those same cards work in other slots.We've tried a different SUP in the chassis...

Setting the MTU under the xconnect config is available on 15.1(1)S2, and allowed a problematic tunnel to come up for us. In our scenario we are upgrading our network from 1546 to 9216 MTU, but cannot do it all at once.  This command has helped us dur...