IBM 8271 Nways F12 User Manual page 92

4-32 C 4: W
HAPTER ORKING
W W I
ITH THE EB NTERFACE
The resilient link pair is defined by specifying a main port and a standby
port at one end of the link. If the main link fails, the main port is
disabled and the standby port is enabled. If the main port has a higher
bandwidth than the standby port, the main port is automatically
re-enabled if no link failure is detected for 2 minutes. Otherwise, you
need to re-enable the main port manually.
When setting up resilient links, note the following:
Resilient link pairs should not be set up if the stack uses the
Spanning Tree Protocol (STP).
Resilient link pairs can only be set up using fiber or twisted pair
ports. The main and standby ports in the same pair, however, can
use any combination of these media.
A resilient link pair can only be set up if:
Neither of the ports are secure ports (have Security enabled).
Neither of the ports belong to another resilient link pair.
A resilient link pair must only be defined at one end of the link.
Ports that are part of a resilient link pair cannot be disabled unless a
link failure occurs.
Displaying Resilient Link Pairs
The Resilient Links page displays the resilient link pairs that are set up
for the stack:
Main Link Unit 1 Port 1 / Unit 1 Port 2 / ...
Displays the port in the stack that is the main port of the resilient
link pair, and the state of the link on that port.
Standby Link Unit 1 Port 1 / Unit 1 Port 2 / ...
Displays the port in the stack that is the standby port of the resilient
link pair, and the state of the link on that port.
Pair State Operational / Not Operational
Displays whether the resilient link pair is operational or not. When
the pair is operational, either the main port or the standby port can
forward traffic.