Cisco 6500 - Manual (Page 45)

4-45
Cisco IOS Software Configuration Guide, Release 12.2SX
OL-13013-06
Chapter 4 Configuring Virtual Switching Systems
Configuring a VSS
The Configuring Port Load Share Deferral on the Peer Switch section provides additional details about
MECs:
Configuring Port Load Share Deferral on the Peer Switch
To configure the load share deferral feature for a port channel, perform this task on the switch that is an
MEC peer to the VSS:
This example shows how to configure the load share deferral feature on port channel 10 of the switch
that is an MEC peer to the VSS:
Router(config)# port-channel load-defer 60
Router(config)# interface port-channel 10
Router(config-if)# port-channel port load-defer
This will enable the load share deferral feature on this port-channel.
Do you wish to proceed? [yes/no]: yes
Configuring Dual-Active Detection
The following sections describe how to configure dual-active detection:
• Configuring Enhanced PAgP Dual-Active Detection, page 4-45
• Configuring BFD Dual-Active Detection, page 4-47
• Configuring Fast Hello Dual-Active Detection, page 4-48
• Configuring the Exclusion List, page 4-49
• Displaying Dual-Active Detection, page 4-49
Configuring Enhanced PAgP Dual-Active Detection
If enhanced PAgP is running on the MECs between the VSS and its access switches, the VSS can use
enhanced PAgP messaging to detect a dual-active scenario.
By default, PAgP dual-active detection is enabled. However, the enhanced messages are only sent on port
channels with trust mode enabled (see the trust mode description in the note).
Command Purpose
Step 1 Router(config)# port-channel load-defer seconds (Optional) Configures the port load share deferral
interval for all port channels.
• seconds—The time interval during which load
sharing is initially 0 for deferred port channels. The
range is 1 to 1800 seconds; the default is 120
seconds.
Step 2 Router(config)# interface port-channel
channel-num
Enters interface configuration mode for the port channel.
Step 3 Router(config-if)# port-channel port load-defer Enables port load share deferral on the port channel.