Alcatel-Lucent OmniSwitch 9900 Series Network Configuration Manual page 462

Configuring BFD
Configuring BFD Support for IS-IS
BFD support for IS-IS is configured on a VLAN basis and is applied to all IPv4 and IPv6 interfaces
associated with the VLAN. A single IS-IS adjacency covers both IPv4 and IPv6 interfaces, but the
interfaces are treated independently within the adjacency. If an IS-IS adjacency has both interface types,
there will be two BFD sessions (one for each interface). When one interface goes down, only the routes
learned through that interface are removed.
The steps below show how to configure and verify BFD support for IS-IS, so that IS-IS is a registered
protocol with BFD and receives forwarding path detection failure messages from BFD.
Note. IS-IS must be running on all participating routers, and BFD must be configured and enabled on the
participating IS-IS VLANs. See
information.
1
To associate BFD with the IS-IS protocol and to change the default BFD status for the IS-IS protocol,
register IS-IS with BFD at the protocol level using the
-> ip isis bfd-state enable
The BFD status for the IS-IS protocol is now enabled, which means that communication between IS-IS
and BFD is enabled. To de-register IS-IS with BFD, enter the following command:
-> ip isis bfd-state disable
2
To verify the BFD status for IS-IS protocol, use the
-> show ip isis status
============================================================================
ISIS Status
============================================================================
System Id
Admin State
Protocols Enabled
Last Enabled
Level Capability
Authentication Check
Authentication Type
Graceful Restart
GR helper-mode
LSP Lifetime
LSP Wait
Adjacency Check
L1 Auth Type
L2 Auth Type
L1 Wide Metrics-only
L2 Wide Metrics-only
L1 LSDB Overload
L2 LSDB Overload
L1 LSPs
L2 LSPs
Last SPF
SPF Wait
Hello-Auth Check
Csnp-Auth Check
Psnp-Auth Check
L1 Hello-Auth Check
L1 Csnp-Auth Check
OmniSwitch AOS Release 8 Network Configuration Guide
"Configuring BFD Session Parameters" on page 20-14
: 2cfa.a213.e402
: DOWN
: IPv4 IPv6
: Mon Oct 30 06:58:41 2017
: L1L2
: True
: None
: Disabled
: Disabled
: 1200
: Max: 5 sec Initial: 0 sec
: Loose
: None
: None
: Disabled
: Disabled
: Disabled
: Disabled
: 0
: 0
: Mon Oct 30 06:58:41 2017
: Max: 10000 ms Initial: 1000 ms
: Enabled
: Enabled
: Enabled
: Enabled
: Enabled
ip isis bfd-state command. For example:
show ip isis status command. For example:
Second: 1 sec
Second: 1000 ms
December 2017
Configuring BFD
for more
page 20-21