Traffic shaping on FR connection, 140ms packet delay? normal?
How much delay should I expect when using traffic shaping on a Frame Relay connection, FIFO queuing?
This is a 3640, IP only, 12.2(5a) 32MB dram. The router is not busy.
The connection is a simple serial connection, 1,280Kbps to a DCE device, Cisco IAD interface emulating FR. Testing showed a ping between the 3640 and the IAD DCE(not going over the Wan) takes 2-3ms without Traffic shaping but 140+ms with traffic shaping. The serial port is not very busy with 4 other sites, and monitoring TS (show Traffic Stat) showed it not active at the time of testing.
The remote sites and out testing shows a dramatic increase in delay when we increase the packet size from 100 to 1,000 Bytes.
The router was power cycled and the results did not change.
Is a 140ms delay normal with traffic shaping?
Should I deploy a different queuing methond? (now default method FIFO)
Is there known bugs at this level? (I could not find any hits on this)
When we were testing the traffic shaping stats and PVC stats did not show packets delayed. The circuit s0/1 was around 100k total usage on a 30 second avg.
When using a ping length of 100 the avg delay was 2ms.
When using a ping length of 1,000 the avg delay was 140ms.
I found that when I used a map class with a "mincir=192000" and put the frame class statement on the line S0/1 the delay for a 1,000 byte ping was reduced to 35ms or so. I believe this is related to the total number of PVC on the line had a mincir that >= total line speed.
When I removed the "Frame traffic-shaping" statement from the line S0/1 the respone of a 1,000 byte ping averaged 16ms, or so.
The carrier want us to use traffic shaping, to avoid FR to ATM overload but we find, for now it works without TS. They may insist that we use TS as the traffic increases.
This is actually a pretty cool feature, i didn't even know it existed until I was looking for a solution to advertise a subnet (prefix in BGP talk), only if a certain condition existed. This is exactly what conditional advertisements does
j ai une question j ai achete un routeur cisco 887VA-k9 , je le configuré avec la configuration ci- dessous
si je le lier avec mon pc portable sur l un de ses ports directement ça marche toute est bien ( la connexion internet + m...
Attached policy provides CLI access to the Cisco 4G router over text messaging. Two files are in the attached .tar file:
2. PDF with instructions on how to load and use the .tcl file.