Cisco Systems A9014CFD manual 12-12

Chapter 12 Configuring Resilient Ethernet Protocol

Configuring Resilient Ethernet Protocol (REP)

Step 5

Step 6

Step 7

Command	Purpose
rep segment segment-id[edge [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:
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.
	• (Optional) 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.
rep lsl-retriesnumber-of-retries	Use the rep lsl-retriescommand to configure the REP link status
	layer (LSL) number of retries before the REP link is disabled.
Example:
Router(config-if)# rep lsl-retries 4
rep stcn {interface interface-id	(Optional) Configures the edge port to send segment topology
segment id-liststp}	change notices (STCNs).
Example:	• Enter interface interface-idto designate a physical Layer 2
	interface or port channel to receive STCNs.

Router(config-if)#rep stcn segment 2-5

•Enter segment id-listto identify one or more segments to receive STCNs. The range is from 1–1024.

•Enter stp to send STCNs to STP networks.

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