Help !?

[blue4cisco]

we hv a 1750 router . my problem is that when I surf web using no proxy option from IE I can use audio video facility ,while i chose proxy setting i can not use audio, video facility. I am using Youngzsoft proxy server.where is the problem ?

[scottmac]

It sounds like an MTU problem.

When you use a proxy, it adds a tag to the frame / packet(?) that may cause the size to exceed 1500 bytes.

Most real-time packets are not fragmentable, if it can't be fragged, it gets dropped.

Try setting the MTU down to ~1476 and see if it works for you.

Good Luck

Scott