We have several 5300's running VOIP with a Fastethernet link to a 2600 then on through another Fastethernet link to an ISP.
When one particular 5300 starts passing VOIP traffic through the 2600, the CPU utilization goes from about 20% to 99%. About 30% of the trafffic is UDP process switched on 64-80 byte packets. The Ethernet load is only 1.5 Mbit/s.
I cannot see any particular difference between the offending AS5300 and the others.
Re: Very High CPU Utilization on VOIP transit router
Hi, All interfaces are Fast switching and I have tried Flow switching but no change.
I think the packets are not cacheing properly or the packet header is changing some how, but I do not know why. Its only 1 AS5300 creating the problem out of 4 others. In order to access the 2600 I sometimes add traffic shaping to reduce the load, but need to bring the traffic down to 100kbit/s to drop the cpu load to 50%. We thought it may be a DOS attack and I have looked at "traffic to local host" but its only incrementing by 2-5 pps.
Are you getting this error “Installer User Interface Mode Not Supported. The installer cannot run in this UI mode. To specify the interface mode, use the -i command-line option, followed by the UI mode identifier. The value UI mode identifiers...
The below trick might come handy when you have to add a new node to a cluster but you don't have or is unsure of the security password for the publisher. This procedure has been around for ages.
1) Login into the CLI of the Publisher.