Cisco 877 throughput and process
Posted on 2010-09-15
We have a site which recently got upgraded to a 40/40 Mbps bonded DSL connection.
The bottleneck, which I feel are two Cisco 877M's have not been upgraded to better routers. These routers currently run interface tracking and are setup for HSRP, in case the new 40/40 connection goes down we have a backup connection there.
My questions are two-fold. Firstly, would a SOHO router like 877 be able to fully utilize this 40/40 connection? The datasheet says the 877 can handle 25,000 pps. With a minimum 64 byte packet with header that translates to 16Mbps throughput. Considering that most of the interesting traffic is HTTP, FTP and as such I would assume this throughput to go up.
But our NMS shows a maximum throughput of around 20Mbps during heavy usage. Is there a reason this router cannot go higher? Or is it hardware limited.
Secondly, the router has a an average CPU usage of over 60% and frequently going over 80% usage. Is this a cause for concern at all with this router?