Cisco Cisco Packet Data Interworking Function (PDIF)
Ethernet Interface Configuration Mode Commands
▀ bfd
▄ Command Line Interface Reference, StarOS Release 16
3596
bfd
Configures Bidirectional Forwarding Detection (BFD) interface parameters.
Product
All
Privilege
Security Administrator, Administrator
Mode
Exec > Global Configuration > Context Configuration > Ethernet Interface Configuration
configure > context context_name > interface interface_name broadcast
Entering the above command sequence results in the following prompt:
[context_name]host_name(config-if-eth)#
Syntax
[no] bfd { echo | interval interval_num } min_rx milliseconds multiplier value
no
Disables the specified option on this interface.
echo
Enables BFD echo mode.
BFD echo mode works with asynchronous BFD. Echo packets are sent by the forwarding engine and
forwarded back along the same path in order to perform detection—the BFD session at the other end does not
participate in the actual forwarding of the echo packets. The echo function and the forwarding engine are
responsible for the detection process, therefore the number of BFD control packets that are sent out between
two BFD neighbors is reduced.
Since the forwarding engine is testing the forwarding path on the remote (neighbor) system without involving
the remote system, there is an opportunity to improve the interpacket delay variance, thereby achieving
quicker failure detection times than when using BFD Version 0 with BFD control packets for the BFD
session.
BFD echo mode works with asynchronous BFD. Echo packets are sent by the forwarding engine and
forwarded back along the same path in order to perform detection—the BFD session at the other end does not
participate in the actual forwarding of the echo packets. The echo function and the forwarding engine are
responsible for the detection process, therefore the number of BFD control packets that are sent out between
two BFD neighbors is reduced.
Since the forwarding engine is testing the forwarding path on the remote (neighbor) system without involving
the remote system, there is an opportunity to improve the interpacket delay variance, thereby achieving
quicker failure detection times than when using BFD Version 0 with BFD control packets for the BFD
session.
interval
interval_num
Specifies the transmit interval (in milliseconds) between BFD packets.
For releases prior to 17.0,
interval_num
is an integer from 50 through 999. (Default 50)
For release 17.0 onwards,
interval_num
is an integer from 50 through 10000. (Default 50)
min_rx
milliseconds
Specifies the receive interval in milliseconds for control packets.
For releases prior to 17.0,
milliseconds
is an integer from 50 through 999. (Default 50)
For release 17.0 onwards,
milliseconds
is an integer from 50 through 10000. (Default 50)