Hi Graham... That should work just fine... One minor thing to note by matching UDP port ranges.. any traffic (not just RTP) that hits those ranges will get priority .. typically not a big thing but worth mentioning. In my earlier posting, I was actually matching by the IP blocks where the softswitch platform (Metaswitch) is deployed vs port ranges.
Priority will only use bandwidth as it requires it so yes, the default class will have access to all the bandwidth until something "prioritized" needs it.... Hope this helps... Paul -----Original Message----- From: cisco-nsp-boun...@puck.nether.net [mailto:cisco-nsp-boun...@puck.nether.net] On Behalf Of Graham Wooden Sent: September 18, 2009 10:00 PM To: cisco-nsp Subject: [c-nsp] Gut check needed - QoS Hi all, Paul¹s email from yesterday regarding QoS on a T1 link got me thinking about a recently deployed PtP T1 serving the same purpose, data/voip to a customer. The routers involved on each side are not fancy; my T1 edge is a 2621 and the CPE is a 1760. The 2621 is hanging off of my 6500/Sup32 that handles my core stuff. My softswitches are hanging off of the same chassis. The CPE 1760 is plugged into switch that has a PIX and a Linksys SPA8000 ATA. Below is what I had deployed. Pauls email from yesterday and talking with a good friend earlier confirmed some of this. I reviewed http://www.cisco.com/en/US/tech/tk543/tk757/technologies_tech_note09186a0080 103eae.shtml to double check the use between Œpriority¹ and Œbandwidth¹. Priority appears to be a better fit. Both sides have the same config applied. Does anyone see anything wrong? I am not 100% sure on the ³ip route-cache policy² under the serial 0/0. I don¹t see it too often in other configs and examples. While this particular ATA does the RTP in a smaller port range, I like the ACL ranges as I have started to deploy this in other situations (where RTP is very random between ports 10K and 20K). And lastly, Is it safe to assume that the class-default will have access to the full T1 until calls start rolling through? TIA, -graham ----- class-map match-any VOIP description "Prioritize SIP and RTP" match access-group 101 ! policy-map VOIP class VOIP priority percent 50 class class-default fair-queue ! interface Serial0/0 bandwidth 1536 ip address n.n.n.n 255.255.255.252 no ip unreachables no ip proxy-arp ip route-cache policy no ip mroute-cache load-interval 30 service-module t1 cablelength short 110ft service-module t1 timeslots 1-24 service-policy output VOIP ! access-list 101 permit udp any any range 4000 5999 access-list 101 permit udp any any range 10000 20000 _______________________________________________ cisco-nsp mailing list cisco-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/ _______________________________________________ cisco-nsp mailing list cisco-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/