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Setting the Port Configuration
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Specifying the Active and Backup Ports for the Flex Links
To specify an active port and a backup port (peer) for the flex links, perform this task in privileged mode:
Task
Specify an active port and a backup port (peer) for
the flex links.
This example shows how to specify port 3/48 as the flex-link active port and port 3/47 as the flex-link
backup (peer) port:
Console> (enable) set port flexlink 3/48 peer 3/47
Flexlink is successfully set on the port 3/48 and 3/47
Console> (enable)
Displaying the Port Configuration of the Flex Links
To display information about the flex-link port configuration, perform this task in normal mode:
Task
Display information about the flex-link port
configuration.
This example shows how to display information about all the flex-link ports that are configured on the switch:
Console> (enable) show port flexlink
Port
-----
3/47
3/48
Console> (enable)
Clearing the Port Configuration of the Flex Links
To clear the port configuration of the flex links, perform this task in privileged mode:
Task
Clear the port configuration of the flex links.
Catalyst 6500 Series Switch Software Configuration Guide—Release 8.7
4-18
Chapter 4
Redundant flex links are for simple access topologies (two uplinks from a leaf node). You need to
make sure that there is a loop-free path from the wiring closet to the access network. Unlike STP,
the flex-link port is not designed to detect loops.
Deploying STP in the core network while running flex-link redundancy on the edge is an acceptable
configuration.
The flex links converge faster only if the directly connected link fails. Any other failure in the
network sees no improvement from the flex-link fast convergence.
State
Peer port
----------
---------
linkdown
3/48
active
3/47
Configuring Ethernet, Fast Ethernet, Gigabit Ethernet, and 10-Gigabit Ethernet Switching
Command
set port flexlink mod/port peer mod/port
Command
show port flexlink [mod | mod/port]
State
----------
active
linkdown
Command
clear port flexlink mod/port [peer mod/port]
OL-8978-04
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Troubleshooting
