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Catalyst 6000 Family Content Switching Module Installation and Configuration Note
78-11631-02 Rev. A0
Configuration Examples
Figure 11 QoS Configuration Topology
Without this configuration, 802.1Q priority information is not preserved in packets traversing through
to the switch. Heartbeat messages sent from the primary to the secondary CSM must contain this priority
information so that they will be transmitted without delay. When an excessive delay occurs, an
unnecessary takeover might occur.
You can overcome this limitation by configuring the sending port g1/1 to retain priority information upon
transmission, and the receiving port g1/1 to trust the Class of Service (CoS) (Priority Bits) for the
incoming packets.
Note In the following script, the permit any any command informs the switch to accept incoming packets
with any MAC address from any MAC address.
To configure QoS for fault-tolerance, enter the following commands:
Router>
Router> enable
Router# configure terminal
Router(config)#
Router(config)# class-map match-any Venus
Router(config-cmap)# match access-group name Venus
Router(config-cmap)#
Router(config-cmap)# exit
Router(config)# policy-map Venus
Router(config-pmap)# class Venus
Router(config-pmap-c)# trust cos
Router(config-pmap-c)# exit
Router(config-pmap)# exit
Router(config)#
Router(config)# mls qos
Router(config)#
Router(config)# mac access-list extended Venus
Router(config-ext-macl)# permit any any
Router(config-ext-macl)# exit
Router(config)# int GigabitEthernet 2/1
Router(config-if)# no ip address
Router(config-if)# service-policy input Venus
Router(config-if)# switchport
Router(config-if)# switchport access vlan 200
Router(config-if)# switchport trunk encapsulation dot1q
Router(config-if)# switchport trunk allowed vlan 1,200,1002-1005
Router(config-if)# switchport mode trunk
Router(config-if)# no cdp enable
Router(config-if)# end
Router# !
Heartbeat message
port gl/1
(sending)
port gl/1
(receiving)
Switch-1
CSG
(Active)
Switch-2
CSG
(Standby)
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