Cisco IE 4000, Software Configuration Manual

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Configuring Resilient Ethernet Protocol
How to Configure REP
Command Purpose
1. configure terminal Enters global configuration mode.
2. interface interface-id Specifies the interface, and enters interface configuration mode. The
interface can be a physical Layer 2 interface or a port channel
(logical interface). The port-channel range is 1 to 10.
3. switchport mode trunk Configures the interface as a Layer 2 trunk port.
4. rep segment segment-id [ edge
[ no-neighbor ] [ primary ]] [ preferred ]
Enables REP on the interface, and identifies a segment number. The
segment ID range is from 1 to 1024. These optional keywords are
available:
Note: You must configure two edge ports, including one primary
edge port for each segment.

edge —Configures 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) primary — Configures the port as the primary edge
port, the port on which you can configure VLAN load balancing.

(Optional) no-neighbor— Configures 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.
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.

(Optional) preferred —Indicates 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.
5. rep stcn { interface interface-id | segment
id-list | stp }
(Optional) Configures the edge port to send segment topology
change notices (STCNs).

interface interface-id —Designates a physical interface or port
channel to receive STCNs.

segment id-list— Identifies one or more segments to receive
STCNs. The range is 1 to 1024.

stp— Sends STCNs to STP networks.