Configuring Bfd Support For Static Routes - Alcatel-Lucent OmniSwitch 6850-48 Network Configuration Manual

Configuring BFD

Configuring BFD Support for Static Routes

This section provides information about how to configure and verify BFD support for static routing.
To enable BFD support for a particular static route, use the
shown below:
-> ip static-route 10.1.1.1 255.0.0.0 gateway 10.1.1.25 bfd-std status enable
Note. BFD for a static route is disabled by default. Also, Static Routes support BFD in the echo-only oper-
ational mode.
The above command enables BFD support for a static route with destination ip address as 10.1.1.1, desti-
nation network mask as 255.0.0.0, and gateway address as 10.1.1.25.
In order to create a BFD session for a static route, the gateway address should not match with any local
interface address of the switch, and BFD should be enabled on the interface on which the gateway address
exists. If multiple routes are configured with the same gateway address, only one BFD session will run.
You can verify the BFD session list which shows the gateway address using the
command.
To enable BFD support for all static routes, use the
-> ip static-route all bfd-std enable
You can display the static routes on which BFD is enabled by using the
example:
-> show ip route
+ = Equal cost multipath routes
* = BFD Enabled
Total 12 routes
Dest Address
------------------+-----------------+-----------------+---------+-----------
20.20.20.0
32.32.32.0
60.60.60.0
70.70.70.0
71.71.71.0
78.78.78.0
79.79.79.0
127.0.0.1
Once BFD determines that the next hop is unreachable, it informs IPRM that the neighbor is down. On
receiving this message, IPRM moves the routes corresponding to this gateway to inactive routing database
if BFD status is enabled. If BFD determines that the gateway is reachable, IPRM moves the routes corre-
sponding to the gateway to the forwarding database.
If a BFD-enabled static route is deleted, and other BFD-enabled routes with the same gateway are avail-
able, the BFD session will continue to run; if no routes are available, the router sends NBRDEL message
to BFD-CMM.
page 30-24
Subnet Mask Gateway Addr
255.255.255.0
255.255.255.0 *20.20.20.152
255.255.255.0 *20.20.20.152
255.255.255.0
255.255.255.0
255.255.255.0 *80.80.80.142
255.255.255.0
255.255.255.255
OmniSwitch AOS Release 6 Network Configuration Guide
ip static-routes bfd-std status
ip static-route all bfd-std
show ip route
Age
20.20.20.10 01:56:01
00:00:01
00:01:22
70.70.70.151 00:01:22
71.71.71.151 00:01:22
00:01:22
79.79.79.151 00:01:23
127.0.0.1 01:57:15
Configuring BFD
command, as
show ip bfd-std sessions
command, as shown below:
command. For
Protocol
LOCAL
NETMGMT
NETMGMT
LOCAL
LOCAL
NETMGMT
LOCAL
LOCAL
September 2009