Hello folks, Here's the situation. I have a number of customers who are using XO Communications for T1 DIA access. These customers are also VoIP customers of ours and their VoIP (SIP) traffic all aggregates through a session border controller in our network. All inbound and outbound VoIP goes through these session border controllers.
Their SIP traffic traverses the XO network and to a peering point with us. We have set up QoS rules on the customer's CPE equipment, (Cisco 1800 series routers), so that their outbound VoIP traffic is prioritized in to a priority queue. That works fine. XO has just released a product that will allow for priority queuing on the network switch that is closest to the customer. It marks the traffic with DSCP value of 46, (ef), and puts this designated traffic in a priority queue pointing towards the end user. In theory, this should help prioritize the VoIP traffic from both ends of the customer's T1. Nice in concept, but here's the question. Without having direct packet capture capabilities in a customer's network, is there any way in the Cisco IOS to see if the incoming VoIP packets really do have the express forwarding bit set? On the outbound side from the customer that's easy, but I don't know how to verify that XO is really doing what they say without actually seeing the packets in something like Wireshark. Thanks for any advice. -Nick Voth _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
