Foundry NetIron M2404C and M2404F Metro Access Switches
Configuring Interfaces (Rev. 03)
Network Wide Resilience
© 2008 Foundry Networks, Inc.
Page 50 of 57
Defining the Resilient Link Ports
The
ports
command, in Resilient-link Configuration mode, adds a port pair as a resilient link. This
adds a new resilient link to a list of already defined resilient links. Ports are defined in unit/slot/port
notation.
Command Syntax
device-name
(config-resil-link
N
)#
ports UU1/SS1/PP1 UU2/SS2/PP2
Argument Description
UU1/SS1/PP1
The first resilient link port number.
UU2/SS2/PP2
The second resilient link port number.
Example
Adding the ports pair 1/1/4 and 1/1/5 to the list of resilient links, as resilient link number 3:
device-name
(config)#
resilient-link 3
device-name
(config-resil-link 3)#
ports 1/1/4 1/1/5
Selecting the Preferred Port
The
prefer port
command, in Resilient-link Configuration mode, sets one of the ports of the
resilient link as preferred. Use the
no
form of this command to cancel the preference (unless the
port has a higher bandwidth capacity).
A port is said to be
preferred
if it is always the main port as long as it has the link. Traffic will be
switched back to the main port as soon as its connection is recovered. The preferred port can be
established in several ways:
•
The port with the higher bandwidth (the port operational speed
)
gets the preference
automatically (e.g. - a Giga port is preferred to a Fast Ethernet port), even though the Resilient
Link
show
commands do not show it. This preference setting can be changed by the user.
•
One port is configured as preferred by the
prefer port
command.
Command Syntax
device-name
(config-resil-link
N
)#
prefer port UU/SS/PP
device-name
(config-resil-link
N
)#
no prefer port
Argument Description
UU/SS/PP
The preferred port number.
Selecting the Active Port
The
active port
command,
in Resilient-link Configuration mode, switches the active port of the
currently edited resilient link.
Active port
refers to the current active port. The user can determine the active port manually, using
the
active port
command only if the preferred port has not been established. By default (if a
preferred or active port has not been configured, and the two ports have the same bandwidth
capacity), the active port is the first port that must be configured by the
ports
command.