Cisco 6500 - Manual (Page 44)

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Cisco IOS Software Configuration Guide, Release 12.2SX
OL-13013-06
Chapter 4 Configuring Virtual Switching Systems
Configuring a VSS
Configuring Deferred Port Activation During VSS Standby Recovery
Instead of allowing all ports to be activated simultaneously when a failed chassis is restarted as the VSS
standby chassis, you can configure the system to defer activation of non-VSL ports and then activate the
ports in groups over a period of time.
To specify deferred port activation, perform this task:
This example shows how to configure port activation to be deferred by 120 seconds, then activated in
groups of 20 ports every 5 seconds:
Router(config)# switch virtual domain 1
Router(config-vs-domain)# standby port delay 120
Router(config-vs-domain)# standby port bringup 20 5
Configuring Multichassis EtherChannels
Configure multichassis EtherChannels (MECs) as you would for a regular EtherChannel. The VSS will
recognize that the EtherChannel is an MEC when ports from both chassis are added to the EtherChannel.
You can verify the MEC configuration by entering the show etherchannel command.
One VSS supports a maximum of 512 port channels.
Note Releases earlier than Cisco IOS Release 12.2(33)SXI support a maximum of 128 port channels.
Command Purpose
Step 1 Router(config)# switch virtual domain 1 Enters VSS configuration mode.
Step 2 Router(config-vs-domain)# standby port delay
delay-time
Specifies that the port activation will be initially
deferred and then performed in cycles.
For delay-time, specify the period in seconds before
port activation will begin. The range is 30 to 3600.
Step 3 Router(config-vs-domain)# standby port bringup number
cycle-time
Specifies the number of ports to be activated per
cycle and the waiting time between cycles.
For number, specify the number of ports to be
activated per cycle. The range is 1 to 100. The default
value is 1 port.
For cycle-time, specify the period in seconds
between cycles. The range is 1 to 10. The default
value is 1 second.