-----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Soon Kian Sent: Tuesday, October 09, 2007 11:02 PM Subject: [c-nsp] mpls vpn with MTU less than 1500
Hi Guys, Wondering if anyone is providing your customers with mpls vpn with MTU less than 1500, due to physical media constraint. i.e equipment unable to support Jumbo frame. By means of running tcp-adjust mss etc. If yes, what's your customer's expectation on this. ------------------------------------ While it can be done technically, I personally wouldn't recommend it. There are too many internet sites that block all ICMP, which kills Path MTU Discovery, which blackholes customer traffic with any MTU larger than your 'squeeze' point. I've spent many hours fighting tcp-adjust, clearing the DF bit, etc, and in the end, just gave in to fixing the equipment in the middle so I didn't have to squeeze the MTU, or force every individual customer to change their MTU to support my link.
smime.p7s
Description: S/MIME cryptographic signature
_______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
