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show bfd session

Syntax

show bfd session <brief | detail | extensive | summary>

Description

Display information about active bidirectional forwarding detection (BFD) sessions.

Options

none—Same as brief.

brief—(Optional) Display brief information about all active BFD sessions. Entries are listed by session address.

detail—(Optional) Display detailed information about all active BFD sessions. Entries are listed by session address.

extensive—(Optional) Display extensive information about all active BFD sessions, including summary information. Entries are listed by session address.

summary—(Optional) Display only a summary of BFD statistics.

Required Privilege Level

view

Sample Output

Sample Output: show bfd session brief
Sample Output: show bfd session detail
Sample Output: show bfd session extensive
Sample Output: show bfd session summary

Options at a Glance

Table 13 summarizes information included in each show bfd session command option. In this table, output fields are listed in alphabetical order. In the Output Fields section, the output fields are listed in the order in which they are displayed.


Table 13: Show BFD Session Output Field Summary (Alphabetical Order)
Options
Field Description

Brief, Detail, Extensive

Address—Address on which the BFD session is active.

All

Client count—Total number of clients that are hosting active BFD sessions.

Detail, Extensive

Client—Protocol client for which the BFD session is active. It can be ISIS, OSPF, or Static.

All

Cumulate receive rate—Total number of BFD control packets received per second on all active sessions.

All

Cumulative transit rate—Total number of BFD control packets transmitted per second on all active sessions.

Brief, Detail, Extensive

Detect Time—Negotiated time interval, in seconds, used to detect BFD control packets.

Extensive

Echo mode—Information about the state of echo transmissions on the BFD session.

Detail, Extensive

Heard—Reports whether the remote system's BFD packets are received and whether the remote system is receiving transmitted control packets.

Brief, Detail, Extensive

Interface—Interface on which the BFD session is active.

Detail, Extensive

Local diagnostic—Local diagnostic information about failing BFD sessions.

Extensive

Local discriminator—Authentication code used by the local system to identify that BFD session.

Extensive

Local min tx interval—Minimum amount of time, in seconds, between control packet transmissions on the local system.

Extensive

Min async interval—Minimum amount of time, in seconds, between asynchronous control packet transmissions across the BFD session.

Extensive

Min slow interval—Minimum amount of time, in seconds, between synchronous control packet transmissions across the BFD session.

Detail, Extensive

Multiplier—Negotiated multiplier by which the time interval is multiplied to determine the detection time for the transmitting system.

Brief, Detail, Extensive

Receive Interval or RX interval—Time interval, in seconds, used by the host system to receive BFD control packets.

Detail, Extensive

Remote diagnostic—Remote diagnostic information about failing BFD sessions.

Extensive

Remote discriminator—Authentication code used by the remote system to identify that BFD session.

Extensive

Remote min rx interval—Minimum amount of time, in seconds, between control packet detections on the remote system.

Extensive

Remote min tx interval—Minimum amount of time, in seconds, between control packet transmissions on the remote system.

All

Session count—Total number of active BFD sessions.

Brief, Detail, Extensive

State—State of the BFD session. It can be Up, Down, Init (initializing), or Failing.

Brief, Detail, Extensive

Transmit Interval or TX interval—Time interval, in seconds, used by the transmitting system to send BFD control packets.

Output Fields

Address—Address on which the BFD session is active.

State—State of the BFD session. It can be Up, Down, Init (initializing), or Failing.

Interface—Interface on which the BFD session is active.

Detect Time—Negotiated time interval, in seconds, used to detect BFD control packets.

Tx Interval—Time interval, in seconds, used by the transmitting system to send BFD control packets.

Multiplier—(Detail and Extensive output only) Negotiated multiplier by which the time interval is multiplied to determine the detection time for the transmitting system.

Client—(Detail and Extensive output only) Protocol for which the BFD session is active. It can be ISIS, OSPF, or Static.

RX Interval—time interval, in seconds, used by the host system to receive BFD control packets.

Local diagnostic—(Detail and Extensive output only) Local diagnostic information about failing BFD sessions.

Remote diagnostic—(Detail and Extensive output only) Remote diagnostic information about failing BFD sessions.

Heard—(Detail and Extensive output only) Reports whether the remote system's BFD packets are received and whether the remote system is receiving transmitted control packets.

Min async interval—(Extensive output only) Minimum amount of time, in seconds, between asynchronous control packet transmissions across the BFD session.

Min slow interval—(Extensive output only) Minimum amount of time, in seconds, between synchronous control packet transmissions across the BFD session.

Local min tx interval—(Extensive output only) Minimum amount of time, in seconds, between control packet transmissions on the local system.

Local min rx interval—(Extensive output only) Minimum amount of time, in seconds, between control packet detections on the local system.

Remote min tx interval—(Extensive output only) Minimum amount of time, in seconds, between control packet transmissions on the remote system.

Remote min rx interval—(Extensive output only) Minimum amount of time, in seconds, between control packet detections on the remote system.

Local discriminator—(Extensive output only) Authentication code used by the local system to identify that BFD session.

Remote discriminator—(Extensive output only) Authentication code used by the remote system to identify that BFD session.

Echo mode—(Extensive output only) Information about the state of echo transmissions on the BFD session.

Session count—Total number of active BFD sessions.

Client count—Total number of clients that are hosting active BFD sessions.

Cumulative transmit rate—Total number of BFD control packets transmitted per second on all active sessions.

Cumulative receive rate—Total number of BFD control packets received per second on all active sessions.

Sample Output: show bfd session brief

user@host> show bfd session brief

Transmit

Address              State   Interface       Detect Time  Interval  Multiplier

10.9.5.2             Up      so-0/0/2.0            5.000     2.500      2

10.9.1.1             Up      ge-1/1/0.1            5.000     2.500      2

10.9.1.5             Up      ge-1/1/0.2            5.000     2.500      2

10.9.1.9             Up      ge-1/1/0.3            5.000     2.500      2

10.9.1.13            Up      ge-1/1/0.4            5.000     2.500      2

10.9.1.17            Up      ge-1/1/0.5            5.000     2.500      2

10.9.1.21            Up      ge-1/1/0.6            5.000     2.500      2

10.9.1.25            Up      ge-1/1/0.7            5.000     2.500      2

10.9.1.29            Up      ge-1/1/0.8            5.000     2.500      2

10.9.1.33            Up      ge-1/1/0.9            5.000     2.500      2

10.9.1.69            Up      ge-1/1/0.18           5.000     2.500      2

10.9.1.73            Up      ge-1/1/0.19           5.000     2.500      2

10.9.1.77            Up      ge-1/1/0.20           5.000     2.500      2

10.9.1.81            Up      ge-1/1/0.21           5.000     2.500      2

10.9.1.85            Up      ge-1/1/0.22           5.000     2.500      2

10.9.1.89            Up      ge-1/1/0.23           5.000     2.500      2

10.9.1.93            Up      ge-1/1/0.24           5.000     2.500      2

10.9.1.97            Up      ge-1/1/0.25           5.000     2.500      2



26 sessions, 77 clients

Cumulative transmit rate 10.4 pps, cumulative receive rate 10.4 pps

Sample Output: show bfd session detail

user@host> show bfd session detail 

Transmit

Address              State   Interface       Detect Time  Interval  Multiplier

10.9.5.2             Up      so-0/0/2.0            5.000     2.500      2

  Client ISIS L1, TX interval 2.500, RX interval 2.500, multiplier 2

  Client OSPF, TX interval 2.500, RX interval 2.500, multiplier 2

  Local diagnostic None, remote diagnostic None

  Remote heard, hears us

10.9.1.1             Up      ge-1/1/0.1            5.000     2.500      2

  Client ISIS L1, TX interval 2.500, RX interval 2.500, multiplier 2

  Client ISIS L2, TX interval 2.500, RX interval 2.500, multiplier 2

  Client OSPF, TX interval 2.500, RX interval 2.500, multiplier 2

  Local diagnostic None, remote diagnostic None

  Remote heard, hears us



26 sessions, 77 clients

Cumulative transmit rate 10.4 pps, cumulative receive rate 10.4 pps

Sample Output: show bfd session extensive

user@host> show bfd session extensive 

Transmit

Address              State   Interface       Detect Time  Interval  Multiplier

10.9.5.2             Up      so-0/0/2.0            5.000     2.500      2

  Client ISIS L1, TX interval 2.500, RX interval 2.500, multiplier 2

  Client OSPF, TX interval 2.500, RX interval 2.500, multiplier 2

  Local diagnostic None, remote diagnostic None

  Remote heard, hears us

  Min async interval 2.500, min slow interval 1.000

  Local min tx interval 2.500, min rx interval 2.500

  Remote min tx interval 2.500, min rx interval 2.500, mult 2

  Local discriminator 0x809d100, remote discriminator 0x809d000

  Echo mode disabled/inactive

10.9.1.1             Up      ge-1/1/0.1            5.000     2.500      2

  Client ISIS L1, TX interval 2.500, RX interval 2.500, multiplier 2

  Client ISIS L2, TX interval 2.500, RX interval 2.500, multiplier 2

  Client OSPF, TX interval 2.500, RX interval 2.500, multiplier 2

  Local diagnostic None, remote diagnostic None

  Remote heard, hears us

  Min async interval 2.500, min slow interval 1.000

  Local min tx interval 2.500, min rx interval 2.500

  Remote min tx interval 2.500, min rx interval 2.500, mult 2

  Local discriminator 0x809d000, remote discriminator 0x809d000

  Echo mode disabled/inactive



26 sessions, 77 clients

Cumulative transmit rate 10.4 pps, cumulative receive rate 10.4 pps

Sample Output: show bfd session summary

user@host> show bfd session summary 

26 sessions, 77 clients

Cumulative transmit rate 10.4 pps, cumulative receive rate 10.4 pps
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