Cisco Systems Cisco IOS XR manual Sets the forward-delay timer for all MST instances on, Network

Chapter 3 Bringing Up the Cisco IOS XR Software on a Multishelf System

Configuring the External Cisco Catalyst 6509 Switches

	Command or Action	Purpose
Step 10
	spanning-tree mst forward-time seconds	Sets the forward-delay timer for all MST instances on
		the switch.
	Example:	• We recommend 6 seconds.
	router(config)# spanning-tree mst forward-time 6
Step 11
	spanning-tree mst max-age seconds	Sets the maximum-age timer for all MST instances on
		the switch.
	Example:	• We recommend 8 seconds.
	router(config)# spanning-tree mst max-age 8
Step 12
	spanning-tree mst max-hops hops	Specifies the number of possible hops in the region
		before a BPDU is discarded.
	Example:	• We recommend 4 hops.
	router(config)# spanning-tree mst max-hops 4
Step 13
	spanning-tree mst instance_id priority priority	Sets the spanning tree priority for the switch.
		• The primary Catalyst switch should be configured
	Example:	with priority 0. Priority 0 makes the switch the root
	router(config)# spanning-tree mst 0-1 priority	of the network.
	28672	• The second Catalyst switch should be configured
		with a number greater than 0 and less than 32768. If
		the primary Catalyst switch (priority 0) fails, the
		second switch becomes the root of the network.
Step 14
	udld aggressive	Enables the Unidirectional Link Detection (UDLD)
		protocol aggressive mode.
	Example:
	router(config)# udld aggressive
Step 15
	udld message time interval	Configures the time between UDLD probe messages on
		ports that are in advertisement mode and are currently
	Example:	determined to be bidirectional.
	router(config)# udld message time 7	• Valid values are from 7 to 90 seconds.
		• We recommend 7 seconds.
Step 16
	interface gigabitethernet slot/port	Enters interface configuration mode for the specified
		interface.
	Example:
	router(config)# interface GigabitEthernet3/1
Step 17
	switchport	Configures a LAN interface as a Layer 2 interface in
		preparation for additional switchport commands.
	Example:
	router(config-if)# switchport
Step 18
	switchport mode access	Specifies a nontrunking, nontagged single-VLAN
		Layer-2 interface.
	Example:
	router(config-if)# switchport mode access

	Cisco IOS XR Getting Started Guide
OL-10957-02		3-13