High availability 142
Configuring Uplink Failure Detection
The preceding figure shows a basic UFD configuration. Port 21 on Blade Switch 1 is connected to a Layer 2/3
routing switch outside of the chassis. Port 20 and port 22 on Blade Switch 2 form a trunk that is connected to a
different Layer 2/3 routing switch. The interconnect ports (17-18) are disabled.
In this example, NIC 1 is the primary network adapter; NIC 2, NIC 3, and NIC 4 are non-primary adapters. NIC 1
and NIC 2 are connected to port 1 and port 2 on Blade Switch 1. NIC 3 and NIC 4 are connected to port 1 and
port 2 on Blade Switch 2.
Configuring UFD on Switch 1 (CLI example)
1. Assign uplink ports (20-24) to be monitored for communication failure.
>> Main# /cfg/ufd/fdp ena (Enable Failure Detection Pair)
>> FDP# ltm (Select Link to Monitor menu)
>> Failure Link to Monitor# addport 21 (Monitor uplink port 21)
2. Assign downlink ports (1-16) to disable when an uplink failure occurs.
>> /cfg/ufd/fdp/ltd (Select Link to Disable menu)
>> Failure Link to Disable# addport 1 (Add port 1 as a Link to Disable)
>> Failure Link to Disable# addport 2 (Add port 2 as a Link to Disable)
3. Turn UFD on.
>> /cfg/ufd/on (Turn Uplink Failure Detection on)
>> Uplink Failure Detection# apply (Make your changes active)
>> Uplink Failure Detection# save (Save for restore after reboot)
When a link failure or Spanning Tree blocking occurs on port 21, Switch 1 disables port 1 and port 2.
Configuring UFD on Switch 2 (CLI example)
1. Create a trunk group of uplink ports (20-24) to monitor. First you must set each port to full duplex mode.
>> Main# /cfg/port 20/gig/mode full (Set port 20 to full duplex)
>> Main# /cfg/port 22/gig/mode full (Set port 22 to full duplex)
>> Main# /cfg/trunk 2 (Create trunk group 2)
>> Trunk group 2# ena (Enable trunk group 2)
>> Trunk group 2# add 20 (Add port 20 to trunk group 2)
>> Trunk group 2# add 22 (Add port 22 to trunk group 2)
2. Assign the trunk group to be monitored for communication failure.
>> Main# /cfg/ufd/fdp ena (Enable Failover Pair)
>> FDP# ltm (Select Link to Monitor menu)
>> Failover Link to Monitor# addtrnk 2 (Monitor trunk group 2)
3. Assign downlink ports (1-16) to disable when an uplink failure occurs.
>> Main# /cfg/ufd/fdp/ltd (Select Link to Disable menu)
>> Failover Link to Disable# addport 1 (Add port 1 as a Link to Disable)
>> Failover Link to Disable# addport 2 (Add port 2 as a Link to Disable)
4. Turn UFD on.
>> Main# /cfg/ufd/on (Turn Uplink Failure Detection on)
>> Uplink Failure Detection# apply (Make your changes active)
>> Uplink Failure Detection# save (Save for restore after reboot)
When a link failure or Spanning Tree blocking occurs on trunk group 2, Switch 2 disables port 1 and port 2.
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