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New Member

IPSec vs MTU

Hi!

I'm having somes problems with the MTU size regarding the VPN Client configuration. I believe Cisco recomends changing the VPN Client MTU size to 1400. That works fine with a dial-up connection but waht if i connect my PC to a LAN? Do i have to change it to 1500 again?

Thanks,

Olindo

  • Other Security Subjects
4 REPLIES
New Member

Re: IPSec vs MTU

Olindo

MTU is set on each interface individually. Thus you can set your MTU on your dial up adapter, and leave your Ethernet card alone.

Regards, Barry

New Member

Re: IPSec vs MTU

Hi Barry!

My question is exactly that: does Cisco recommends only changing the dial-up MTU and not the LAN MTU?

Regards,

Olindo

New Member

Re: IPSec vs MTU

Olindo

Not sure what Cisco actually recommends, but I see no reason why you shouldn't have one MTU setting for your dial up adapter, and leave the Ethernet card as default.

Prior to me getting a fixed IP address on my ADSL connection at home, I used to attach the DSL direct to the USB port on my PC and run dial up networking over it - and I used to have exactly the configuration you describe. Dial up Adapter MTU was 1400 bytes, Ethernet MTU was default. It all worked fine.

Regards, Barry

New Member

Re: IPSec vs MTU

Barry,

thanks for tour help. This answers my wuestion.

Regards,

Olindo

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