3Com 4510G Configuration Manual page 850

# Configure Reaction entry 1, specifying that five consecutive probe failures trigger the Static
Routing-Track-NQA collaboration.
[SwitchA-nqa-admin-test-icmp-echo] reaction 1 checked-element probe-fail threshold-type
consecutive 5 action-type trigger-only
[SwitchA-nqa-admin-test-icmp-echo] quit
# Start NQA probes.
[SwitchA] nqa schedule admin test start-time now lifetime forever
4) Configure a Track object on Switch A.
# Configure Track object 1, and associate it with Reaction entry 1 of the NQA test group (with the
administrator admin, and the operation tag test).
[SwitchA] track 1 nqa entry admin test reaction 1
5) Verify the configuration
# Display information of the Track object on Switch A.
[SwitchA] display track all
Track ID: 1
Status: Positive
Reference object:
NQA entry: admin test
Reaction: 1
# Display the routing table of Switch A.
[SwitchA] display ip routing-table
Routing Tables: Public
Destinations : 5
Destination/Mask Proto Pre Cost
10.1.1.0/24 Static 60
10.2.1.0/24 Direct 0
10.2.1.2/32 Direct 0
127.0.0.0/8 Direct 0
127.0.0.1/32 Direct 0
The output information above indicates the NQA test result, that is, the next hop 10.2.1.1 is reachable
(the status of the Track object is Positive), and the configured static route is valid.
# Remove the IP address of interface VLAN-interface 3 on Switch B.
<SwitchB> system-view
[SwitchB] interface vlan-interface 3
[SwitchB-Vlan-interface3] undo ip address
# Display information of the Track object on Switch A.
[SwitchA] display track all
Track ID: 1
Status: Negative
Reference object:
NQA entry: admin test
Reaction: 1
Routes : 5
NextHop
0 10.2.1.1
0 10.2.1.2
0 127.0.0.1
0 127.0.0.1
0 127.0.0.1
7-5
Interface
Vlan3
Vlan3
InLoop0
InLoop0
InLoop0