Hypathetical scenario: I have a trunk port on a router going to a switch with subinterface fastethernet 0/0.1 for data, and 0/0.2 for voice. I want to perform LLQ or prioritize voice traffic on the 0/0.2 subif. Even though both data and voice have their own logical interface and therefore a FIFO queue for each, they eventually have to compete for the same physical transmit queue. How do I prioritize voice. Cisco documentation states that because logical interfaces do not support CBWFQ/LLQ, a higherarchical policy map needs to be created with the child map doing the CBWFQ/LLQ and the parent map doing shaping to create backpressure as a mechanism for CBWFQ to be engaged. However the documentation that I have read states to place the higherarchical policy map on the subinterface itself. This only works if I am trying to prioritize different flows that exist on the same subif but not if I want to prioritize flows on one subif over flows on the other subif. Do I place the higherarchical map on the interface itself (fastethernet 0/0)? If so, what shaping rate should be used and is there any documentation to this exact scenario. Maybe another question should be is there even a need to do this given the speed of fastethernet?
I was hoping to find a specific document regarding Ethernet/Fastethernet/Gigethernet subif's and best practices along with configuration examples for this situation. Thanks though for the link, it did help and it is a great resource. I'll have to conclude based on the documentation that is out there that these logical interfaces are treated similar to that of Frame Relay subif's (as mentioned in the link) and serial interface subif's (as mentioned in Cisco Press and on the web), meaning that the parent map (that is doing the shaping) would be placed on the physical interface thereby creating shaping queue's that could then be prioritized as configured in the child/nestled map. The "Bc" value would have to be configured to force the "Tc" to 10 millseconds for voice to avoid too much delay.
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.