In a message written on Sat, Jan 28, 2012 at 10:31:20AM +0900, Randy Bush wrote:
(embarrassed to say, but to set an honest example, i do not believe iij does)
I also want to take this opportunity to say there are some cool new features (that I have not had a chance to deploy myself) that may have been missed if queueing wasn't your day job for the last few years. "QoS: Time-Based Thresholds for WRED and Queue Limit for the Cisco 12000 Series Router" http://www.cisco.com/en/US/docs/ios/12_0s/feature/guide/12stbwr.html Don't want to do math on how big the queue should be? Configure by ms: outer> enable Router# configure terminal Router (config)# policy-map policy1 Router(config-pmap)# class class-default Router(config-pmap-c)# bandwidth percent 80 Router(config-pmap-c)# random-detect Router(config-pmap-c)# random-detect precedence 2 4 ms 8 ms Router(config-pmap-c)# exit Router(config-pmap)# exit Router(config)# interface serial8/0/0:0.1000 Router(config-subif)# service-policy output policy1 Router(config-subif)# end That's a 4ms to 8ms buffer! Handy, nice! Another frame concept brought to IP is ECN, congestion notification. http://www.cisco.com/en/US/docs/ios-xml/ios/qos_conavd/configuration/15-0m/q... Router(config)# policy-map pol1 Router(config-pmap)# class class-default Router(config-pmap-c)# bandwidth per 70 Router(config-pmap-c)# random-detect Router(config-pmap-c)# random-detect ecn Requires other bits in the network to be ECN aware, but if they are, good stuff. -- Leo Bicknell - bicknell@ufp.org - CCIE 3440 PGP keys at http://www.ufp.org/~bicknell/