Disabling Bfd Echo Mode - Cisco 3845 - Security Bundle Router Software Manual
Software configuration guide
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Chapter 29
Configuring IP Unicast Routing
Beginning in privileged EXEC mode, follow these steps to reenable HSRP BFD:
Command
Step 1
configure terminal
Step 2
interface interface-id
Step 3
ip address ip-address subnet-mask
Step 4
standby [group-number] ip
[ip-address] [secondary]]
Step 5
standby bfd
Step 6
exit
Step 7
standby bfd all-interfaces
Step 8
end
Step 9
show standby neighbors
Step 10
copy running-config startup-config
To disable HSRP support for BFD on all interfaces, enter the no standby bfd all-interfaces global
configuration command. To disable it on an interface, enter the no standby bfd interface configuration
command.
Note
If you disable standby BFD on an interface by entering the no standby bfd interface configuration
command, to activate BFD sessions on other interfaces, you must disable and reenable it globally by
entering the no standby bfd all-interfaces global configuration command followed by the standby bfd
all-interfaces global configuration command.
Disabling BFD Echo Mode
When you configure a BFD session, BFD echo mode is enabled by default on BFD interfaces. You can
disable echo mode on an interface so it sends no echo packets and but only sends back echo packets
received from a neighbor. When echo mode is disabled, control packets are used detect forwarding
failures. You can configure slow timers to reduce the frequency of BFD control packets.
Beginning in privileged EXEC mode, follow these steps to disable echo mode on a BFD device and to
set the slow timer rate:
Command
Step 1
configure terminal
Step 2
interface interface-id
Step 3
no bfd echo
Step 4
exit
Step 5
bfd slow-timer [milliseconds]
Step 6
end
OL-23400-01
Purpose
Enter global configuration mode.
Specify an interface for a BFD session, and enter interface configuration
mode. Only physical interfaces support BFD.
Configure the IP address and IP subnet mask for the interface.
Activate HSRP.
(Optional) Enable HSRP support for BFD on the interface.
Return to global configuration mode.
(Optional) Enable HSRP support for BFD on all interfaces.
Return to privileged EXEC mode.
Verify your entries.
(Optional) Save your entries in the configuration file.
Purpose
Enter global configuration mode.
Enter a BFD interface and enter interface configuration mode.
Disable BFD echo mode on the interface. It is enabled by default, but can
be disabled independently on BFD neighbors.
Return to global configuration mode.
(Optional) Configure a BFD slow-timer value. The range is from 1000 to
30000 milliseconds. The default is 1000 milliseconds.
Return to privileged EXEC mode.
Cisco ME 3800X and 3600X Switch Software Configuration Guide
Configuring BFD
29-79
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