Cisco 3845 Integrated Services Router -- Browsing problem

Hi,

I have a client who installed CISCO 3845 ISR to
connect to the internet via a leading ISP. But he has
problem in accessing Certain sites, say Google.com
comes fast and works fine, but yahoo, rediff etc
hangs.

One of the major features of this series router is
Network Admission Control, but its turned off. Content
filter is also off. 

To see is not ISP problem we replaced the router with
a lower series (2500), it worked fine with no changes
in Workstation settings.

I know that this request doesn't belong here in this
list, but as the members of this group are dealing
with network, I suppose some one may have had this
problem and can help me solving it.

Any luck?

Thanks

-- JS


                
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