Cisco Systems A9014CFD manual Rep segment segment-id edge no-neighbor, Primary preferred, 12-17

Chapter 12 Configuring Resilient Ethernet Protocol

Configuring Resilient Ethernet Protocol (REP)

	Command	Purpose
Step 3
	interface interface-id	Specifies the interface, and enters interface configuration mode.
		• Enter the physical Layer 2 interface or port channel ID. The
	Example:	port-channel range is 1 to 8.
	Router(config)# interface
	gigabitethernet0/1
	Router(config)# interface port-channel 1
Step 4
	rep segment segment-idedge no-neighbor	Enables REP on the interface, and identifies a segment number. The
	[primary preferred]	segment ID range is from 1 to 1024.
		Note You must configure two edge ports, including one primary
	Example:	edge port for each segment.
	Router(config-if)# rep segment 1 edge	These are the optional keywords:
	no-neighbor preferred
		• Enter the edge keyword to configure the port as an edge port.
		Entering edge without the primary keyword configures the
		port as the secondary edge port. Each segment has only two
		edge ports.
		• Enter the no-neighborkeyword to configure a port with no
		external REP neighbors as an edge port. The port inherits all
		properties of edge ports, and you can configure them the same
		as any edge port.
		• On an edge port, enter the primary keyword to configure the
		port as the primary edge port, the port on which you can
		configure VLAN load balancing.
		Note Although each segment can have only one primary edge
		port, if you configure edge ports on two different switches
		and enter the primary keyword on both switches, the
		configuration is allowed. However, REP selects only one of
		these ports as the segment primary edge port. You can
		identify the primary edge port for a segment by entering the
		show rep topology privileged EXEC command.
		• Enter the preferred keyword to indicate that the port is the
		preferred alternate port or the preferred port for VLAN load
		balancing.
		Note Configuring a port as preferred does not guarantee that it
		becomes the alternate port; it merely gives it a slight edge
		among equal contenders. The alternate port is usually a
		previously failed port.

Note For configuring REP LSL timer and VLB, see Configuring REP Interfaces, page 12-10.

	Cisco ASR 901 Series Aggregation Services Router Software Configuration Guide
OL-23826-09		12-17