IP Router Configuration
Router Configuration Guide 169
bfd
Syntax bfd transmit-interval [receive receive-interval] [multiplier multiplier] [echo-receive echo-
interval] [type cpm-np]
no bfd
Context config>router>interface
config>router>interface>ipv6
Description This command specifies the bi-directional forwarding detection (BFD) parameters for the associated
IP interface. If no parameters are defined the default values are used.
The multiplier specifies the number of consecutive BFD messages that must be missed from the peer
before the BFD session state is changed to down and the upper level protocols (OSPF, IS-IS, BGP or
PIM) is notified of the fault.
The no form of the command removes BFD from the router interface regardless of the IGP/RSVP.
Important notes: On the 7750 SR and 7950 XRS SR OS, the transmit-interval and receive receive-
interval values can only be modified to a value less than 100 ms when:
1. The type cpm-np option is explicitly configured.
2. The service is shut down (shutdown)
3. The interval is specified 10 to 100000.
4. The service is re-enabled (no shutdown)
To remove the type cpm-np option, re-issue the bfd command without specifying the type parameter.
Default no bfd
Parameters transmit-interval — Sets the transmit interval, in milliseconds, for the BFD session.
Values 10 to 100000 (see Important Notes above) The minimum value is
300 msec for central BFD sessions in the 7950 XRS.
Default 100
receive receive-interval — Sets the receive interval, in milliseconds, for the BFD session.
Values 10 to 100000 (see Important Notes above)
Default 100
multiplier multiplier — Set the multiplier for the BFD session.
Values 3 to 20
Default 3
echo-receive echo-interval — Sets the minimum echo receive interval, in milliseconds, for the
session.
Values 100 to 100000
Default 0
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