Echo intervals

This command helps to assign the minimum receive interval of echo session, either 0 or in the range 50 to 1000 milliseconds. The default interval is 500 milliseconds. Zero indicates that the local end is not interested in receiving echo packets from the peer.

Syntax


bfd min-echo-receive-interval MILLISECONDS

Description

Update the minimum receive interval for echo packets of all the sessions under the current VLAN. When minimum echo receive interval is set to 0 milliseconds for the BFD session under OSPF, incoming BFD echo packets are not processed. When minimum echo receive interval is set to 0 milliseconds for the BFD session under VRRP, the default interval 500 milliseconds is considered.

Options

min-echo-receive-interval: Update minimum echo interval of the BFD session.
milliseconds: The time interval, either 0 or in the range 50 to 1000 milliseconds, between the reception of two BFD echo packets. 0 indicates that the local end is not interested in receiving echo packets from the peer.

Echo intervals configuration

; J9850A Configuration Editor; Created on release #KB.16.02.0000x
; Ver #0b:fc.59.f4.7b.ff.ff.fc.ff.ff.3f.ef:0d
hostname "switch-name"
module A type j9989a
module C type j9550a
module F type j9987a
snmp-server community "public" unrestricted
oobm
  ip address dhcp-bootp
    exit
vlan 1
  name "DEFAULT_VLAN"
    untagged A2-A24,C1-C24,F1-F24
    ip address dhcp-bootp
    exit
ip routing
router ospf
  area 0.0.0.2
    area 0.0.0.3
    area backbone
    enable
    exit
bfd enable
bfd echo-src-ip-address 2.2.2.2
vlan 20
  untagged A1
    bfd min-echo-receive-interval 700
    ip address 100.100.100.100 255.255.255.0
    ip ospf 100.100.100.100 area backbone
    ip ospf 100.100.100.100 bfd
    exit

Show BFD-session

Switch# show bfd-session 1

BFD Session Information – Session 1

 Min Tx Interval (sec)       : 3                 
 Min Rx Interval (sec)       : 3                 
 Min Echo Rx Interval (msec) : 700               
 Detect Multiplier           : 5                 
 Authentication Mode         : NONE                     
 Password                    : ""                    
 Application                 : OSPF       
 Local Discriminator         : 1          
 Remote Discriminator        : 1          
 Echo                        : Enabled  
 Local Diagnostic            : No diagnostics configured.

VLAN Source IP     Destination IP  State Pkt In Pkt Drop Pkt Out
---- ------------ ---------------   ----- ------ ------- -------
20    100.100.100.100 100.100.100.101 Up    322      0        320