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New Member

MTU size

We are running an IPSEC tunnel with single DES between PIX 525 and 520. Remote site reported slow newwork performance when they access resources at the main site. Main site has a DS3 and remote site has 4 T1. Right now MTU size on all interfaces set 1500. I've been advised that making MTU size 1400 might take of the problem. Any suggestions?

Thanks

1 REPLY
New Member

Re: MTU size

Yes. This should help. IPSEC headers are large and can cause some problems.

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