When enabling a queueing tool on an interface(Serial in particular), IOS reduces the TX Queue from some value (16) to a small value (2).i.e. TX queue accpets 2 packets in the TX queue.. Does enabling queueing increase delay from the output queue to the TX queue, if congestion does not exist? Creating any noticeable jitter?
Per Cisco, "The smaller the value (TX queue value), the less impact the TX Queue has on the effects of the queuing method." In other words, if you have a large value for the TX Queue, many of your packets would never hit the software queue enabled on the interface. You would lose benefits like prioritizing voice packets over data packets and link fragmentation and interleaving (LFI). Queuing is the reccomended best practice for voice networks. I understand your question regarding increased delay moving a greater number of packets from the software queue to the TX queue. The delay should be negligible and the benefits of using queuing for your voice traffic far outweigh any negative impact from this delay. Queuing tools are used to decrease jitter for delay sensitive traffice like voice. It's true that this can increase delay for your data traffic, but it is much more tolerant of this delay.
SIP traces provide key information in troubleshooting SIP Trunks, SIP
endpoints and other SIP related issues. Even though these traces are in
clear text, these texts can be gibberish unless you understand fully
what they mean. This document attempts to br...
Please find the attached HTML document, download and open it on your PC.
This provides an easy to use form where you simply answer a few
questions and it will render the proper jabber-config.xml file for you
to copy/paste. There is built in logic to verif...
[toc:faq]CUCM Database Replication is an area in which Cisco customers
and partners have asked for more in-depth training in being able to
properly assess a replication problem and potentially resolve an issue
without involving TAC. This document discusse...