Enabling Echo Mode To Test The Forwarding Path To A Bfd Peer - Cisco ASR 9000 Series Routing Configuration Manual

Enabling Echo Mode to Test the Forwarding Path to a BFD Peer

Sample show command output to check the mode
This example show the output of the show bundle bundle-ether command with the bundle mode selected:
RP/0/RP0/CPU0:R3-PE3#sh bundle bundle-ether 4301
Bundle-Ether4301
Status:
Local links {active/standby/configured}:
Local bandwidth {effective/available}:
MAC address (source):
Inter-chassis link:
Minimum active links / bandwidth:
Maximum active links:
Wait while timer:
Load balancing:
LACP:
mLACP:
IPv4 BFD:
Port
--------------------
Te0/5/0/4
Te0/7/0/8
What to Do Next
For a bundle to accept the new BFD mode change, you must bring down and then recreate the existing BFD
sessions.
Enabling Echo Mode to Test the Forwarding Path to a BFD Peer
BFD echo mode is enabled by default for the following interfaces:
• For IPv4 on member links of BFD bundle interfaces.
• For IPv4 on other physical interfaces whose minimum interval is less than two seconds.
Cisco ASR 9000 Series Aggregation Services Router Routing Configuration Guide, Release 5.3.x
270
Flap suppression timer:
Cisco extensions:
State:
Mode:
Fast detect:
Start timer:
Neighbor-unconfigured timer:
Preferred min interval:
Preferred multiple:
Destination address:
Device
---------------
Local
Link is Active
Local
Link is Active
If you have configured a BFD minimum interval greater than two seconds on a physical
Note
interface using the bfd minimum-interval command, then you will need to change the
interval to be less than two seconds to support and enable echo mode. This does not
apply to bundle member links, which always support echo mode.
Up
2 / 0 / 2
20000000 (20000000) kbps
0014.1c00.0003 (Chassis pool)
No
1 / 1 kbps
64
2000 ms
Default
Operational
Off
Disabled
Not configured
Operational
Up
ietf
####------ this is the mode cisco/ietf .
Enabled
60 s
60 s
150 ms
3
101.43.1.1
State
-----------
Active
Active
Implementing BFD
Port ID B/W, kbps
-------------- ----------
0x8000, 0x0012 10000000
0x8000, 0x0006 10000000