> > > What does that indicate to you? 1472 + VLAN tag plus MPLS < 1500? >
When provisioning MPLS circuits, one has to be careful. Basic MPLS will attach one or more 4 byte labels on to each packet. Psuedowires attach additional bytes onto each packet. WAN circuits running MPLS need to be provisioned such that the interface MTU is set to 1500 PLUS any pseudowire overhead plus any MPLS label overhead. If you try to run MPLS stuff across a standard 1500 MTU WAN interface, you get the problems you are now encountering: fragmentation, drops, corruption, ... Some protocols can handle it, but I've read that RDP sets the no-fragment bit, thus dropping the packets. STM-1 and DS3 circuits run by default at 4470 bytes so easily accommodate MPLS overhead. Ethernet circuits are at 1500, and you have to work with upstream vendors to ensure their networks can handle MTU's greater than 1500. Cisco switches need a reboot after setting a system mtu setting. Routers can change interface mtu settings on the fly. You could try setting your MTU setting on your pc to 1300 and see if things work. If they do, then you know you have an upstream mtu problem. Ray http://www.oneunified.net/blog -- Scanned for viruses and dangerous content at http://www.oneunified.net and is believed to be clean. _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
