I have a 7500 that connects to a 7600 using a PA-FE-TX interface and I'm using MPLS. When I set the MPLS mtu on the 7600 it requires me to adjust the interface MTU (6700 series switch card) as well (from 1500 to 1524). The 7500 will allow me to send the MPLS MTU to 1524, but it says that I can't adjust the interface MTU. Is there a way around this? I've searched the forum and didn't find a definitive answer. I'd like to adjust the 7500 if possible, but if not, then I could do the 7600.
Any help or guidance is appreciated.