I have a general question for anyone specifically working in the telco arena. I have started noticing a problem with latency. These are inter-lata links and NORMALLY they run around 53ms. Lately I've started noticing response times into the lower 60s. These links are leased point to point T1s using ppp encap. My configurations haven't changed and that's why I'm coming here. All of my interface counters look good, no errors, utilization is very low, normally around 14/255. Any suggestions or feedback is greatly appreciated and I will rate post
You carrier may have done some "grooming" and sent your traffic through a different path than the one you are used to seeing.
It may also be that some intermediate carrier (like a long distance trunk provider to your carrier) has re-groomed their circuits without specifically notifying your carrier.
Probably the best place to start is to talk to the carrier, have them check the path, pull the PM stats for the equipment handling your path, and see if they can find anything that's changed.
It might also be worthwhile to put an analyzer (like a Sniffer) in-line to check for things like re-transmissions. If there's a problem at one of the handoff points, some frames can be dropped (administratively or otherwise) .... the transmitter of the packet sees a timeout and re-sends the packet.
The re-tranmission symptom presents the same as higher latency; longer time to complete the dialog.
Given that you have a reasonable load and are showing no errors at your routers, the carrier seems to be the likeliest culprit.
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.