RE: : CE-CE MTU Problem ...
Mansoor Khan <MKHAN <at> qtel.com.qa>
2004-10-07 06:46:26 GMT
Try changing the MTU to 1526 on all L2 devices within the network and
Change the MTU (tag-switching mtu 1526) on all routers.
From: Garry Glendown [mailto:garry <at> regio.net]
Sent: 7/Oct/2004 12:00 AM
To: mpls-ops <at> mplsrc.com
Subject: [MPLS-OPS]: CE-CE MTU Problem ...
after getting just about all the problems worked out (both MPLS
connection related and not) and our customer up an running, a new
problem came up ... while all "regular" connection going through the DSL
dial up router work fine, the MPLS VPN connection of the customer has
problems with the MTU (I suspect) - while normal telnet/terminal
sessions work fine inside their MPLS VPN, ftp transfers don't ...
problem is I can't get a tcpdump from the FTP site (AS400?), so I can't
really pinpoint what is happening at the moment ... basic config is: all
Cisco routers, MTU 1456 on the DSL link (changed down from 1480
originally used), MTU 1500 on the ethernet on either side of the CE
routers, minimum MTU 1500 on the backbone w/ an mpls mtu of 1520 w/ ip