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Tuesday, October 5, 2010

Question 127

How do you configure AutoQoS on a router using serial 0/0? Provide a configuration example.
Posted by Packets Analyzed at 9:56 PM
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1 comments:

Packets Analyzed said...

BOLD items were added by autoqos

Example: Serial interface using PPP

interface Serial1/1
ip address 10.1.1.1 255.255.255.0
encapsulation ppp
auto qos voip trust
serial restart-delay 0
service-policy output AutoQoS-Policy-Trust

class-map match-any AutoQoS-VoIP-RTP-Trust
match ip dscp ef (match ef traffic that has been tagged)
class-map match-any AutoQoS-VoIP-Control-Trust
match ip dscp cs3 (match cs3 traffic that has been tagged)
match ip dscp af31 (match af31 traffic that has been tagged)
!
!
policy-map AutoQoS-Policy-Trust
class AutoQoS-VoIP-RTP-Trust
priority percent 70 (ef traffic gets %70 guaranteed priority when contention occurs)
class AutoQoS-VoIP-Control-Trust
bandwidth percent 5 (cs3 and af31 traffic gets 5 percent of bandwidth when contention occurs)
class class-default
fair-queue


rmon event 33333 log trap AutoQoS description "AutoQoS SNMP traps for Voice Drops" owner AutoQoS
rmon alarm 33333 cbQosCMDropBitRate.1059.1061 30 absolute rising-threshold 1 33333 falling-threshold 0 owner AutoQoS (rmon monitoring events and alarms)

Note: I have tried it on an interface running frame-relay and an error message comes up

(config-fr-dlci)#auto qos voip trust
AutoQoS is supported only on DLCIs with P2P sub-interface

Works fine under a subinterface that is point-to-point

October 6, 2010 at 8:17 PM

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