[j-nsp] fragmentation in GRE tunnel

[Dan Rautio]

Hi Ruslan,

M-series tunnel pic there is no way to do what you want.  You can use
the 'clear don't fragment' option on the m-series although it requires
an AS pic.

- Dan

> -----Original Message-----
> From: juniper-nsp-bounces at puck.nether.net 
> [mailto:juniper-nsp-bounces at puck.nether.net] On Behalf Of 
> Ruslan A. Magomedov
> Sent: Thursday, May 03, 2007 10:11 AM
> To: Juniper Request Help List
> Subject: [j-nsp] fragmentation in GRE tunnel
> 
> 
> Hello
> 
> Could anybody help me with resolving this problem. Is it possible
> to transmit packets, then tunnel MTU is greather than MTU of egress
> interface, in other words using only GRE fragmentation (not ip
> fragmentation). I have tried it on Juniper M-series with tunnel PICs
> and have got no result. It looks like router does not reassemble
> GRE packets, but it's doing fragmentation on egress 
> interface. Is there
> any acceptable solution to transmit large packets with out using
> ordinary IP fragmentation. The final aim is transmitting of 
> MPLS traffic
> over GRE tunnel without limitations due to MTU value of 
> transit network
> 
> Best regards
> Ruslan
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