Cisco Catalyst 4500 Series Command Reference Guide

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Catalyst 4500 Series Switch Cisco IOS Command Reference—Release IOS XE 3.4.0SG and IOS 15.1(2)SG)
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Chapter 2 Cisco IOS Commands for the Catalyst 4500 Series Switches
rep block port
rep block port
Use the rep block port interface configuration command on the REP primary edge port to configure
Resilient Ethernet Protocol (REP) VLAN load balancing. Use the no form of this command to return to
the default configuration.
rep block port {id port-id | neighbor_offset | preferred} vlan {vlan-list | all}
no rep block port {id port-id | neighbor_offset | preferred}
Syntax Description
Defaults The default behavior after you enter the rep preempt segment privileged EXEC command (for manual
preemption) is to block all VLANs at the primary edge port. This behavior remains until you configure
the rep block port command.
If the primary edge port cannot determine which port is to be the alternate port, the default action is no
preemption and no VLAN load balancing.
Command Modes Interface configuration
Command History
Usage Guidelines You must enter this command on the REP primary edge port.
id port-id Identify the VLAN blocking alternate port by entering the unique port ID that is
automatically generated when REP is enabled. The REP port ID is a 16-character
hexadecimal value. You can view the port ID for an interface by entering the show
interface interface-id rep detail command.
neighbor_offset Identify the VLAN blocking alternate port by entering the offset number of a
neighbor. The range is –256 to +256; a value of 0 is invalid. The primary edge port
has an offset number of 1; positive numbers above 1 identify downstream
neighbors of the primary edge port. Negative numbers identify the secondary edge
port (offset number -1) and its downstream neighbors.
preferred Identify the VLAN blocking alternate port as the segment port on which you
entered the rep segment segment-id preferred interface configuration command.
Note Entering the preferred keyword does not ensure that the preferred port is
the alternate port; it gives it preference over other similar ports.
vlan Identify the VLANs to be blocked.
vlan-list Enter a VLAN ID from 1 to 4094 or a range or sequence of VLANs (such as 1-3,
22, 41-44) of VLANs to be blocked.
all Enter to block all VLANs.
Release Modification
12.2(44)SG This command was introduced.

Cisco Catalyst 4500 Series Specifications

General

Series	Catalyst 4500 Series
Category	Switch
Layer Support	Layer 2, Layer 3
Form Factor	Modular chassis
Stackable	No
Chassis Slots	3, 6, 7, 10
Power Supply Options	AC, DC
Redundancy	Power supply, Supervisor engine
Network Management	Cisco IOS Software CLI, SNMP, Cisco Prime Infrastructure
Features	Security, QoS
Port Density	Up to 384 ports per chassis
Security Features	802.1X, ACLs, DHCP Snooping, Dynamic ARP Inspection, IP Source Guard
Supervisor Engine	8-E