Yes, PBR is extremely heavy on the CPU. Depending on the CPU, PBR will not be able to process more than 1.000 - 10.000 pps. On the 1721 I estimate no more than 2.000 pps before the CPU hits the ceiling.
You should perhaps use a 2800 series instead, and then the 2821 at least if you want to get some decent performance with this setup.
In newer IOS's there is the command: ip route-cache policy. This should speed things up considerably but I have a TAC case opened myself at this moment because this command is appearently not working.
Agreed w/Leo. The loading of the PBR depends on the no. of packet pass through the PBR enabled interface, if the interface loading is highm then PBR loading will high. The reason is the PBR will examine each packet to determine if it matchs the policy map.
Therefore, if the ADSL interface w/ low bandwidth, it MAY work, otherwise, you will hit the performance issue. You can try to check the no. of packet in the ATM interface to determine the upgrade requirement.
Nobody other than the user will know their requirement. You should forecast the traffic loading in future and consider the new bandwidth upgrade volume and schedule. You also need to consider the leadtime to order the equipment + the new line ready for use.
And the new BW requirement will also lead to new hardware requirement or connection media change.
Hi everyone, I would like to thank you in advance for any help you can provide a newcomer like myself!
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