Cisco Catalyst 4500 Series Software Configuration Manual page 767

Chapter 25 Configuring Resilient Ethernet Protocol
Command
Step 4
Switch(config-if)# rep segment
[
segment-id edge
[ ]
preferred
Step 5
Switch(config-if)# rep stcn
|
interface-id segment id-list
[ ] [ ]]
no-neighbor primary
{
interface
| }
stp
Catalyst 4500 Series Switch, Cisco IOS Software Configuration Guide - Cisco IOS XE 3.9.xE and IOS 15.2(5)Ex
Purpose
Enables REP on the interface, and identifies a segment number. The
segment ID range is from 1 to 1024. These optional keywords are
available.
You must configure two edge ports, including one primary
Note
edge port for each segment.
• Enter edge 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 no-neighbor to configure a port with no
•
external REP neighbors as an edge port. The port inherits all
properties of edge ports. You can configure them as you would
any edge port.
• (Optional) On an edge port, enter primary to configure the port
as the primary edge port, the port on which you can configure
VLAN load balancing.
Although each segment can have only one primary edge port,
Note
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) Enter preferred to indicate that the port is the
preferred alternate port or the preferred port for VLAN load
balancing.
Configuring a port as preferred does not guarantee that it
Note
becomes the alternate port; this only provides a slight
advantage among equal contenders. The alternate port is
usually a previously failed port.
(Optional) Configures the edge port to send segment topology
change notices (STCNs).
Enter interface interface-id to designate a physical interface or
•
port channel to receive STCNs.
Enter segment id-list to identify one or more segments to receive
•
STCNs. The range is 1 to 1024.
Enter stp to send STCNs to STP networks.
•
Configuring REP
25-11