My understanding is that GRE fragmentation should occur if egress interface
MTU is < GRE pkt size.
For GRE reassembly, you need IDP policy, this means high memory SRX model.
IDP license is not needed.
Rgds
Alex
----- Original Message -----
From: "Lukasz Martyniak" <lmartyn...@man.szczecin.pl>
To: <juniper-nsp@puck.nether.net>
Sent: Tuesday, January 24, 2012 2:04 PM
Subject: [j-nsp] GRE packet fragmentation on j-series
Hi all
I have some problem with gre tunnels. I need to fragment packages in
tunnel. I run gre between two jseries (junos 10.4R6) and lunch MPLS on it.
The problem looks like that packages with MTU above 1476 are not
fragmented/reassembled and are dropped.
interfaces gr-0/0/0
unit 10 {
clear-dont-fragment-bit;
description "Tulne to r1-lab";
tunnel {
source 10.200.0.1;
destination 10.200.0.2;
allow-fragmentation;
path-mtu-discovery;
}
family inet {
mtu 1500;
address 100.100.100.1/30;
}
family mpls {
}
}
Have someone have similar problem ? is there a simple way to fix this ?
Best Lukasz
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