Specifications

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Catalyst 4500 Series Switch Cisco IOS Command Reference—Release IOS XE 3.3.0XO(15.1(1)XO)
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Chapter 2 Cisco IOS Commands for the Catalyst 4500 Series Switches
rep segment
rep segment
Use the rep segm ent interface configuration command to enable Resilient Ethernet Protocol (REP) on
the interface and to assign a segment ID to it. Use the no form of this command to disable REP on the
interface.
rep segment segment-id [edge [no-neighbor] [primary]] [preferred]
no rep segment
Syntax Description
Defaults RE P is disabled on the interface.
When REP is enabled on an interface, the default is for the port to be a regular segment port.
Command Modes Interface configur ation
Usage Guidelines R EP ports must be Layer 2 trunk port s. A non-ES REP port can be either an IEEE 802.1Q trunk port or
an ISL trunk port.
REP ports should not be configu red as one of these port types:
• SPAN destination port
• Private VLAN port
• Tun nel port
• Acce ss port
You must configure two edge ports on each REP segm ent, a primary edge port and a po rt to act as a
secondary edge por t. If you configure t wo ports i n a segment as the prima ry edge port, for ex ample po rts
on different switches, the configuration is allowed, but the REP selects one of them to serve as the
segment primary edge port.
REP is supported on EtherChanne ls, but not on an individual po rt that belongs to an EtherCh annel.
segment-id Assign a segment ID to the interface. The range is from 1 to 1024.
edge (Optional) Identify the interface as one of the two REP edge ports. Entering the edge
keyword without the primary keyword configures t he port as the secondary edge
port.
no-neighbor (Optional) Conf igure a segment edge with no external REP neighbor.
primary (Optional) On an edge port, specify that the port is the primary edge port. A segment
has only one primary edge port. If you co nfigure two ports in a segment as the
primary edge port, for example ports on different switches, the REP selects one of
them to serve as the segment primary edge port.
preferre d (Optional) Specify that the port is the preferred alternate port or the preferred port
for VLAN load balancing.
Note Conf iguring a port as preferr ed does not guarantee th at it becomes the
alternate port; it merely gives it a slight edge among equal contenders. The
alternate port is usually a previously failed port.