1711 access router MTU translation 1

[utoyo]

I've got a 1711 modular access router, it is connected to a pppoe DSL connection. Currently, I have to set the MTU to 1492 on all the (windows) machines inorder for them to access the internet. (I know that linksys (Now owned by cisco) routers translate (or some other process to avoid this issue) the MTU size so this change doesn't have to made on the individual machines.)

Is there a setting in SDM or elsewhere where I can set MTU so the router changes the size of the packets that go out onto the internet?

Thank you in Advance.

 

[voltron1011]

The default on ethernet interfaces is 1500... You really don't want to mess with that value at all. If you really want to tweak around though, you can go into 'interface ethernet x/x' configuration command for your particular ethernet interface and use the MTU command there.

 

[fartingfrog]

Do you authenticate with PPPoE or PPPoA? I use PPPoE, and it is subject to MTU problems like you are perhaps experiencing. Read this article---it fixed my problem.

http://www.cisco.com/warp/public/794/router_mtu.html

Hope this helps.

Tim

 

[utoyo]

I'm currently using drtcp to set the MTU to 1492 but it creates a problem when we have visitors who need access the internet.

Tim (or anyone else), were you able to change the MTU on your router so you didn't need to change the MTU on the machines?

Thanks.

 

[plshlpme]

i found on my pppoe dialer that i needed this
ip tcp adjust-mss 1452

in addition to the
ip mtu 1492

then internet access worked like a dream

 

[plshlpme]

with the above setup.. you dont need to touch the settings on your pcs