Handbook

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>> Information# ufd
Uplink Failure Detection 1: Enabled
LtM status: Down
Member STG STG State Link Status
--------- --- ------------ -----------
port 19 down
1 DISABLED
10 DISABLED *
15 DISABLED *
* = STP turned off for this port.
LtD status: Auto Disabled
Member Link Status
--------- -----------
port 1 disabled
port 2 disabled
port 3 disabled
port 4 disabled
Uplink Failure Detection 2: Disabled
Uplink Failure Detection 3: Disabled
Uplink Failure Detection 4: Disabled
Use the /stats/ufd command to find out how many times link failure was detected on the LtM, how
many times Spanning Tree blocking state was detected on the LtM, and how many times UFD disabled
ports in the LtD.
Configuring Uplink Failure Detection
The preceding figure shows a basic UFD configuration. Assume that port 19 on Blade Switch 1 is
connected to a Layer 2/3 routing switch outside of the chassis. Port 18 and port 19 on Blade Switch 2 form
a trunk that is connected to a different Layer 2/3 routing switch.
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 (AOS CLI example)
1. Assign uplink ports (18-21) to be monitored for communication failure.
>> Main# /cfg/ufd/fdp 1/ena (Enable Failure Detection Pair 1)
>> FDP# ltm (Select Link to Monitor menu)
>> Failure Link to Monitor# addport 19 (Monitor uplink port 19)
2. Assign downlink ports (1-16) to disable when an uplink failure occurs.
>> /cfg/ufd/fdp 1/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 18, Switch 1 disables port 1 and port 2.
Configuring UFD on Switch 2 (AOS CLI example)
1. Create a trunk group of uplink ports (18-21) to monitor.
>> Main# /cfg/trunk 2 (Create trunk group 2)