[SwitchB-bfd-session-btoa] quit
After the preceding configurations, you can view that the status of the BFD session is Up when
the display bfd session command is used on Switch A or Switch B.
The display on Switch A is as follows:
[SwitchA] display bfd session all
------------------------------------------------------------------------
Local Remote PeerIpAddr State Type InterfaceName
------------------------------------------------------------------------
1 2 100.1.1.2 Up S_IP_IF Vlanif10
------------------------------------------------------------------------
Total UP/DOWN Session Number : 1/0
Step 5 Enable IS-IS fast sense.
# Configure Switch A.
[SwitchA] interface vlanif 10
[SwitchA-Vlanif10] isis bfd static
[SwitchA-Vlanif10] quit
# Configure Switch B.
[SwitchB] interface vlanif 10
[SwitchB-Vlanif10] isis bfd static
[SwitchB-Vlanif10] quit
Step 6 Verify the configuration.
# Enable the debugging on Switch A and output information to the VTY tunnel.
[SwitchA] info-center source bfd channel 1 log level debugging state on
[SwitchA] quit
<SwitchA> debugging isis circuit-information
<SwitchA> terminal debugging
<SwitchA> terminal logging
<SwitchA> terminal monitor
# Run the shutdown command on Vlanif10 of Switch B to simulate a link fault.
[SwitchB-Vlanif10] shutdown
# On Switch A, the following log information and debugging information are displayed. It
indicates that IS-IS deletes the neighbor relationship with Switch B according to the fault
reported by BFD.
Sep 12 2007 11:32:18 RT2 %%01ISIS/4/PEER_DOWN_BFDDOWN(l): IS-IS process id 1 nei
ghbor 2222.2222.2222 is down on the interface GE1/0/0 because BFD node is Down.
The last Hello packet is received at 11:32:10. The maximum interval for sending
Hello packets is 9247. The local router sends 426 Hello packets and receives 61
Hello packets. The Hello packet type is Lan Level-2.
*0.481363988 RT2 ISIS/6/ISIS:
ISIS-1-FastSense: Deleting Neighbour by IP Address 100.1.1.2 On Vlanif10(IS01_1048)
Run the display isis route command or the display isis peer command on Switch A, no
information is displayed. This indicates that the IS-IS neighbor relationship between Switch A
and Switch B is deleted.
----End
Configuration Files
l Configuration file of Switch A
#
S6700 Series Ethernet Switches
Configuration Guide - IP Routing 6 IS-IS Configuration
Issue 01 (2012-03-15) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
345
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