[132465] in North American Network Operators' Group
Jumbo frame Question
daemon@ATHENA.MIT.EDU (Harris Hui)
Thu Nov 25 19:13:56 2010
To: nanog@nanog.org
From: Harris Hui <harris.hui@hk1.ibm.com>
Date: Fri, 26 Nov 2010 08:13:57 +0800
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
Hi
Does anyone have experience on design / implementing the Jumbo frame
enabled network?
I am working on a project to better utilize a fiber link across east co=
ast
and west coast with the Juniper devices.
Based on the default TCP windows in Linux / Windows and the latency bet=
ween
east coast and west coast (~80ms) and the default MTU size 1500, the
maximum throughput of a single TCP session is around ~3Mbps but it is t=
oo
slow for us to backing-up the huge amount of data across 2 sites.
The following is the topology that we are using right now.
Host A NIC (MTU 9000) <--- GigLAN ---> (MTU 9216) Juniper EX4200 (MTU 9=
216)
<---GigLAN ---> (MTU 9018) J-6350 cluster A (MTU 9018) <--- fiber link
across site ---> (MTU 9018) J-6350 cluster B (MTU 9018) <--- GigLAN ---=
>
(MTU 9216) Juniper EX4200 (MTU 9216) <---GigLAN ---> (MTU 9000) NIC - H=
ost
B
I was trying to test the connectivity from Host A to the J-6350 cluster=
A
by using ICMP-Ping with size 8000 and DF bit set but it was failed to p=
ing.
Does anyone have experience on it? please advise.
Thanks :-)=
