Huawei AR2200-S Series Configuration Manual page 177

Huawei AR2200-S Series Enterprise Routers
Configuration Guide - Reliability
----End
Example
Run the display bfd session all verbose command. The value of the Proc interface status field
is Enable(Sub-If), indicating that the BFD session aa has been associated with the main interface
and sub-interface.
<Huawei> display bfd session all verbose
--------------------------------------------------------------------------------
Session MIndex : 64
--------------------------------------------------------------------------------
Local Discriminator
Session Detect Mode
BFD Bind Type
Bind Session Type
Bind Peer IP Address
224.0.0.184
NextHop Ip Address
224.0.0.184
Bind Interface
FSM Board Id
Min Tx Interval (ms)
Actual Tx Interval (ms): 1000
Local Detect Multi
Echo Passive
Destination Port
Proc Interface Status
WTR Interval (ms)
Active Multi
Last Local Diagnostic
Bind Application
Session TX TmrID
Session Init TmrID
Session Echo Tx TmrID
PDT Index
Session Description
--------------------------------------------------------------------------------
Issue 01 (2012-01-06)
NOTE
l The BFD session does not report the BFD status to the bound interface immediately after the
commit command is executed because the BFD session may not be set up or not Up. This prevents the
BFD session from reporting an incorrect state to the interface. When the BFD status changes, the BFD
session reports the BFD status to the interface to trigger the interface status change.
l If the BFD session must be synchronized to an interface immediately, ensure that the BFD
configurations on the two routers are the same and run the shutdown and undo shutdown commands
on the BFD session. When the undo shutdown command is executed for a BFD session, a BFD session
detection timer is started. If the BFD session becomes Up through negotiation before the timer times
out, the BFD session notifies an interface of the Up state. Otherwise, the BFD session considers the
link faulty and notifies the interface of the Down state. The status of a BFD session and the status of
an interface can be synchronized in real time.
l If the process-interface-status command is saved in the configuration file, the BFD session for which
the process-interface-status command is run notifies an interface that the BFD session becomes Down
when the router is restarted, in view of the initial status of the interface being Down.
l Before the BFD status is associated with the interface status, the BFD configurations on two routers
must be correct and matched. If the BFD status on the local interface is Down, check whether the BFD
configuration on the remote end is correct and the BFD session is shut down.
Total UP/DOWN Session Number : 1/0
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
(One Hop) State : Up
: 1 Remote Discriminator
: Asynchronous Mode Without Echo Function
: Interface(GigabitEthernet1/0/0)
: Static
:
:
: GigabitEthernet1/0/0
: 0 TOS-EXP
: 1000 Min Rx Interval (ms)
Actual Rx Interval (ms): 1000
: 3 Detect Interval (ms)
: Disable Acl Number
: 3784 TTL
: Enable(Sub-If)
: -
: 3
: Control Detection Time Expired
: No Application Bind
: - Session Detect TmrID
: - Session WTR TmrID
: -
: FSM-0 | RCV-0 | IF-0 | TOKEN-0
: -
3 BFD Configuration
Name : aa
: 2
: 7
: 1000
: 3000
: -
: 255
: -
: -
169