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Cisco ME 3800X and ME 3600X Switch Command Reference
OL-28238-01
Chapter 2 Cisco ME 3800X and ME 3600X Switch Cisco IOS Commands
rep stcn
rep stcn
To configure a port to send Resilient Ethernet Protocol (REP) segment topology change notifications
(STCNs) to another interface, to other segments, or to Spanning Tree Protocol (STP) networks, use the
rep stcn command in interface configuration mode on a REP edge port. To disable the sending of STCNs
to the interface, segment, or STP network, use the no form of this command.
rep stcn {interface interface-id | segment id-list | stp}
no rep stcn {interface | segment | stp}
Syntax Description
Defaults Transmission of STCNs to other interfaces, segments, or STP networks is disabled.
Command Modes Interface configuration
Command History
Usage Guidelines Enter this command on a segment edge port.
You use this command to notify other portions of the Layer 2 network of topology changes that occur in
the local REP segment. This removes obsolete entries in the Layer 2 forwarding table in other parts of
the network, which allows faster network convergence.
You can verify the configuration by entering the show interfaces rep detail privileged EXEC command.
When you configure rep stcn stp the STCNs are sent to an stp network. However where no-neighbor
keyword is specified MST will be enabled on the port.
Examples This example shows how to configure the REP primary edge port to send STCNs to segments 25 to 50:
Switch (config)# interface gigabitethernet0/2
Switch (config-if)# rep stcn segment 25-50
Switch (config-if)# exit
interface interface-id Identifies a physical interface or port channel to receive STCNs.
segment id-list Identifies one REP segment or list of segments to receive STCNs. The range is
1 to 1024. You can also configure a sequence of segments (for example 3-5, 77,
100).
stp Sends STCNs to an STP network.
Release Modification
12.2(52)EY This command was introduced.
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