Ufd Configuration Example; Monitoring Ufd - Juniper EX2500 Configuration Manual

Use the following 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:
ex2500(config)#

UFD Configuration Example

Figure 14 shows a basic UFD configuration. In this example, NIC 1 is the primary
network adapter; NIC 2 is a non-primary adapter. NIC 1 is connected to port 16,
and NIC 2 is connected to port 17. Port 2 is connected to a Layer 2/3 routing switch.
The following procedure pertains to the example shown in Figure 14:
1. Configure Network Adapter Teaming on the servers.
2. Assign the Link to Monitor (LtM) ports.
3. Assign the Link to Disable (LtD) ports.
4. Turn on Uplink Failure Detection (UFD).

Monitoring UFD

The UFD information menu displays the current status of the LtM and LtD, and
their member ports or trunks. For example:
ex2500# show ufd
Uplink Failure Detection: Enabled
LtM status: Down
Member
---------
* = STP turned off for this port.
LtD status: Auto Disabled
Member
---------
Ports that are already members of a trunk group are not allowed to be assigned
to an LtM.
A port cannot be added to a trunk group if it already belongs to an LtM.
An LtD can contain one or more ports, and/or one or more trunks.
show ufd counters
ex2500(config)# ufd fdp ltm port 2
ex2500(config)# ufd fdp ltd port 16
ex2500(config)# ufd fdp enable
ex2500(config)# ufd enable
STG STG State
--- ------------
port 2 1 DISABLED
Link Status
-----------
port 16 disabled
Chapter 8: High Availability Through Uplink Failure Detection
Link Status
-----------
down
UFD Configuration Example
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