F3726, F3211, F3174, R5135, R3816-HP Firewalls and UTM Devices High Availability Configuration Guide-6PW100
68
Hardware Feature com
p
atible
F1000-A-EI/F1000-S-EI No
F1000-E No
F5000 Yes
Firewall module No
U200-A No
U200-S No
BFD supports the control packet mode and echo packet mode:
• Associating a track entry with the echo-mode BFD session detects a directly connected link. Before
that, you must configure the source IP address of BFD echo packets.
• Associating a track entry with the control-mode BFD session detects an indirectly connected link.
You must make this configuration for both the local and remote ends. Otherwise, BFD does not take
effect.
The BFD functions as follows when it is associated with a track entry:
• If the BFD detects that the link fails, it informs the track entry of the link failure. The track module then
sets the track entry to the Negative state.
• If the BFD detects that the link is normal, the track module sets the track entry to the Positive state.
For more information about BFD, see "Configuring BFD."
286BConfiguration procedure
To associate track with BFD:
Ste
p
Command
Remarks
1. Enter system view.
system-view N/A
2. Create a track entry,
associate it with the BFD
session, and specify the delay
time for the track module to
notify the associated
application module when the
track entry status changes.
track track-entry-number bfd { control |
echo } interface interface-type
interface-number remote ip remote-ip local
ip local-ip [ delay { negative negative-time |
positive positive-time } * ]
No track entry is created
by default.
NOTE:
W
hen associatin
g
track with BFD, do not configure the virtual IP address of a VRRP
g
roup as the local or
remote address of a BFD session.
122BAssociating track with interface management
The interface management module monitors the physical status or network-layer protocol status of the
interface. The interface management module functions as follows when it is associated with a track entry:
• When the physical or network-layer protocol status of the interface changes to up, the interface
management module informs the track module of the change and the track module sets the track
entry to Positive.