I am looking for a way to block spanning-tree BPDU's from being transmitted across a VPLS or L2VPN instance. I have encountered an issue where Cisco switches configured with different native VLANs on their core facing interfaces will cause an err-disable state, due to the mismatched VLANs in the BPDU's. Is there an easy way to block BPDU's on a per interface or per routing-instance basis? I've tried configuring protocol *stp under the VPLS routing instance but it appears this combination is not valid. I am using MX series routers with 9.3R3.8 code.