From: Brent Colwell (bcolwell@xxxxxxxxxxx)
Date: Wed Jul 03 2002 - 13:44:12 GMT-3
Jerry,
The "frame-relay fragment" command has to be configured on both sides of the fr
ame-relay connection for it to work. You may need to upgrade your code on the
2501 if the command is not supported. You can go to www.cisco.com/go/fn to fin
d out what versions of IOS support FRF.12 Fragmentation.
Someone can correct me on this if I'm wrong, but I don't think it matters if th
e DNF bit is set or not. The reason for this is the FRF.12 fragmentation is pe
rformed at layer 2 not layer 3. The DNF bit would be an issue if you were usin
g the layer 3 fragmentation with the "ip mtu" statement. Don't take that for g
ospel though, you might want to research that a little more.
Brent
-----Original Message-----
From: Jerry Haverkos [mailto:jhaverkos@columbus.rr.com]
Sent: Wednesday, July 03, 2002 8:05 AM
To: ccielab@groupstudy.com
Subject: FRTS Fragmentation Question
Everyone
I defined a map class with fragmentation on a 3640 Low Speed Serial
Interface. The interface is frame relay encapsulated with 2 pvc's. No
sub-interfaces are used.Bandwidth=64.
The other end of one of the pc's is a 2501 with a high speed serial
interface with Bandwidth=64 (which is the clocking rate provided by the
frame-relay switch). In defining the map class there, the option (parameter)
to fragment was unavailable.
I presume if I define fragmentation on one end of the link I need
fragmentation defined on the other end. Do I just have to forget about
fragmenting? Is my assumption wrong - I don't need fragmentation on both
ends?
Does fragmentation only work on IP packets that do not have the don't
fragment bit set -- therefor fragmented packets are handled properly by
layer 3?
Help
Jerry Haverkos
jhaverkos@columbus.rr.com
614-351-8617
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