Reading over the QoS SRND and trying to get a better understanding of 3750 QoS and more specifically, the Conditionally-Trusted IP Phone + PC with Scavenger-Class QoS (Basic) Model. I understand the ACLs and marking traffic as well as queuing, but am having some difficulty in understanding the theory behind the policing within the Policy-Maps.
example: class-map match-all VVLAN-VOICE match access-group name VVLAN-VOICE class-map match-all VVLAN-CALL-SIGNALING match access-group name VVLAN-CALL-SIGNALING policy-map IPPHONE+PC-BASIC class VVLAN-VOICE set ip dscp 46 police 128000 8000 exceed-action drop class VVLAN-CALL-SIGNALING set ip dscp 24 police 32000 8000 exceed-action policed-dscp-transmit ip access list extended VVLAN-VOICE permit udp 10.1.110.0 0.0.0.255 any range 16384 32767 ip access list extended VVLAN-CALL-SIGNALING permit tcp 10.1.110.0 0.0.0.255 any range 2000 2002 the comment for the police statement under class VVLAN-VOICE states that this will only allow one voice call per switchport VVLAN. So my question is (I hope this doesn't sound to dumb!), what happens to a 2nd,3rd, and so on concurrent call that may come from an IP Phone connected to a switchport with this policy? Same question for the police statement under class VVLAN-CALL-SIGNALING. Is it that any signaling traffic that exceeds 32k will be marked down to CS1? any clarification on this would be much appreciated! James NOTICE: This electronic mail message and any files transmitted with it are intended exclusively for the individual or entity to which it is addressed. The message, together with any attachment, may contain confidential and/or privileged information. Any unauthorized review, use, printing, saving, copying, disclosure or distribution is strictly prohibited. If you have received this message in error, please immediately advise the sender by reply email and delete all copies.
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