Users Guide

1692 Audio Video Bridging
In compliance with sections 11.2.3 and 11.2.4 of IEEE 802.1AS, canonical
flow control (PAUSE) and Priority Flow Control (PFC) must be disabled on
bridges that are enabled for PTP. This configuration is not enforced by bridge
management.
In-situ measurements have shown residence times of up to 10 ms and
PDELAY turnaround times of up to 1 ms.
AVB Configuration Example
The following example configures an AVB switch.
1 Create VLAN 2. This VLAN is used to carry the MSRP traffic.
console#config
console(config)#vlan 2
console(config-vlan2)#exit
2 Configure two CoS queues for minimum latency, with CoS queue 3
receiving a guarantee of 10% of the scheduler and CoS queue 4 receiving a
guarantee of 15% of the scheduler.
console(config)#cos-queue min-bandwidth 0 0 0 10 15 0 0
3 Configure CoS queues 3 and 4 as strict priority queues. This means that
CoS queue 4 packets will be scheduled for transmission first, with up to
15% of the scheduler slots. CoS queue 3 packets will be scheduled next,
with up to 10% of the scheduler slots, and then all other packets will be
scheduled fairly with the remaining scheduler slots.
console(config)#cos-queue strict 3 4
4 Configure i nterfaces Te1/0/1-4 as trunk ports and enable them for
802.1AS, MVRP, MSRP, and MMRP. MSRP classes A and B are allowed to
reserve 15% and 10% of the switch bandwidth respectively.
console(config)#interface range Te1/0/1-4
console(config-if)#switchport mode trunk
console(config-if)#dot1as
console(config-if)#mvrp
console(config-if)#mmrp
console(config-if)#msrp
console(config-if)#msrp delta-bw class A 15
console(config-if)#msrp delta-bw class B 10
console(config-if)#exit