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Hello at all,

i´ve a problem with the cisco 876 integrated services router.
The router´s ios-version is 12.4(11)T4 and it has a ADSL2+ (16 Mbit
downstream / 1 Mbit upstream) connection.

If i start a download via http (or any other protocol), the cpu load
still remains at 100% until the download ends ...

Are there any solutions for this problem or has anybody the same
problems with this router. I´ve tried other ios-images, but the problem
is still the same.

Greetz, Marco

Marco Buchholz wrote:
> Hello at all,
>
> i´ve a problem with the cisco 876 integrated services router.
> The router´s ios-version is 12.4(11)T4 and it has a ADSL2+ (16 Mbit
> downstream / 1 Mbit upstream) connection.
>
> If i start a download via http (or any other protocol), the cpu load
> still remains at 100% until the download ends ...
>
> Are there any solutions for this problem or has anybody the same
> problems with this router. I´ve tried other ios-images, but the problem
> is still the same.
>
> Greetz, Marco

Perhaps this relates to your choice of switching paths (particularly if
you were using process switching).

Have you enabled CEF globally, and Fast Switching on the interfaces?

e.g.:

ip cef

interface FastEthernet0
ip route-cache flow

If the problem relates to your choice of switching paths, you might
search for documents with the following titles on the Cisco web site:

- How to Choose the Best Router Switching Path for Your Network

- Performance Tuning Basics

Best Regards,
News Reader

Marco Buchholz schrieb:
> i´ve a problem with the cisco 876 integrated services router.
> The router´s ios-version is 12.4(11)T4 and it has a ADSL2+ (16 Mbit
> downstream / 1 Mbit upstream) connection.
>
> Are there any solutions for this problem or has anybody the same
> problems with this router. I´ve tried other ios-images, but the problem
> is still the same.

Try IOS 12.4(6)T11 or 12.4(9)T7 instead.
There was a 30 percent CPU usage increase for the 870 routers with
12.4(11)T according to
<http://www.cisco.com/en/US/docs/ios/12_4t/release/notes/124TFEAT.html#wp1533957>

Disable the IPS feature.
Try to disable the http inspection rule and use the generic tcp
inspection instead if looking for less CPU usage.

Also 12.4(15)T6 is worth a trial (I don't use the newer T7, as I found
serious tracebacks in the T7 rebuild)

--
ULi