Rep Block Port - Cisco Catalyst 4500 Series Command Reference Manual

Chapter 2 Cisco IOS Commands for the Catalyst 4500 Series Switches

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.
Syntax Description
id port-id
neighbor_offset
preferred
vlan
vlan-list
all
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 Release
12.2(44)SG
Usage Guidelines
You must enter this command on the REP primary edge port.
OL-25342 -01
rep block port {id port-id | neighbor_offset | preferred} vlan {vlan-list | all}
no rep block port {id port-id | neighbor_offset | preferred}
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.
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.
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.
Identify the VLANs to be blocked.
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.
Enter to block all VLANs.
Modification
This command was introduced.
Catalyst 4500 Series Switch Cisco IOS Command Reference—Release IOS XE 3.3.0SG and IOS 15.1(1)SG)
rep block port
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