Config example. The remote end is the same.
Tunnel73
ip address yy.yy.yy.yy 255.255.255.252
ip mtu 1476
ip tcp adjust-mss 1460
tunnel source xxxxx
tunnel destination zzzzzzzzz
tunnel path-mtu-discovery
The two tunnel endpoints are ME3400s. I expected that this
configuration would reduce the quantity of fragmentations needed by the
router but looks like "IP Input" was up to around 20%. The user
experience was bad since most web pages would fail to load. I thought
"ip tcp adjust-mss" would signal help signal the users OSs to act
appropriately given the situation.
do fragments increase in "show ip traffic | in frag"? In any case, since
you use ip mtu 1476, you should set the TCP MSS at 40 bytes lower (max
1436 in your case)
Regards,
John
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