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Cisco ASR 901 Series Aggregation Services Router Software Configuration Guide
OL-23826-09
Chapter 12 Configuring Resilient Ethernet Protocol
Configuring Resilient Ethernet Protocol (REP)
Note For configuring REP LSL timer and VLB, see Configuring REP Interfaces, page 12-10.
Step 3
interface
interface-id
Example:
Router(config)# interface
gigabitethernet0/1
Router(config)# interface port-channel 1
Specifies the interface, and enters interface configuration mode.
• Enter the physical Layer 2 interface or port channel ID. The
port-channel range is 1 to 8.
Step 4
rep segment segment-id edge no-neighbor
[primary | preferred]
Example:
Router(config-if)# rep segment 1 edge
no-neighbor preferred
Enables REP on the interface, and identifies a segment number. The
segment ID range is from 1 to 1024.
Note You must configure two edge ports, including one primary
edge port for each segment.
These are the optional keywords:
• 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-neighbor keyword 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.
Command Purpose