Cisco Systems A9014CFD manual 12-13

Chapter 12 Configuring Resilient Ethernet Protocol

Configuring Resilient Ethernet Protocol (REP)

	Command	Purpose
Step 8
	rep platform vlb segment segment-idvlan	(Optional) Configures the VLAN list which forms the VLB group.
	{vlan-listall}	This command should be issued on all Cisco ASR 901 routers
		participating in VLB for a particular segment and should have a
	Example:	matching VLAN list. This VLAN list should also match with the
		rep block command issued on primary edge port.
	Router(config)# rep platform vlb segment
	1 vlan 100-200	• Enter vlan vlan-listto block a single VLAN or a range of
		VLANs,
		• Enter vlan all to block all VLANs. This is the default
		configuration.
Step 9
	rep block port {id port-id	(Optional) Configures VLAN load balancing on the primary edge
	neighbor-offset preferred} vlan	port, identifies the REP alternate port in one of three ways, and
	{vlan-list all}	configures the VLANs to be blocked on the alternate port.
	Example:	• Enter the id port-idto identify the alternate port by port ID. The
		port ID is automatically generated for each port in the segment.
	Router(config-if)# rep block port
		You can view interface port IDs by entering the show interface
	0009001818D68700 vlan all
		interface-idrep [detail] privileged EXEC command.
		• Enter a neighbor-offsetnumber to identify the alternate port as
		a downstream neighbor from an edge port. The range is from
		–256 to 256, with negative numbers indicating the downstream
		neighbor from the secondary edge port. A value of 0 is invalid.
		Enter -1to identify the secondary edge port as the alternate
		port.
		Note Because you enter this command at the primary edge port
		(offset number 1), you would never enter an offset value of
		1 to identify an alternate port.
		• Enter the preferred keyword to select the regular segment port
		previously identified as the preferred alternate port for VLAN
		load balancing.
		• Enter vlan vlan-listto block one VLAN or a range of VLANs.
		• Enter vlan all to block all VLANs.
		Note Enter this command only on the REP primary edge port.
Step 10
	rep preempt delay seconds	(Optional) Configures a preempt time delay. Use this command if
		you want VLAN load balancing to automatically trigger after a link
	Example:	failure and recovery. The time delay range is 15 to 300 seconds. The
		default is manual preemption with no time delay.
	Router(config-if)#rep preempt delay 60
		Note Use this command only on the REP primary edge port.
Step 11
	rep lsl-age-timer value	(Optional) Configure a time (in milliseconds) for which the REP
		interface remains up without receiving a hello from a neighbor. The
	Example:	range is from 120 to 10000 ms in 40-ms increments; the default is
		5000 ms (5 seconds).
	Router(config-if)rep lsl-age-timer 5000

	Cisco ASR 901 Series Aggregation Services Router Software Configuration Guide
OL-23826-09		12-13