Supported Platforms
Related Documentation
- ACX, M, MX, QFX, T Series
- Examples: Configuring BFD for Static Routes
- Example: Configuring BFD for OSPF
- Example: Configuring BFD for BGP
- ACX, J, M, MX, SRX, T Series
- Example: Configuring BFD for IS-IS
- EX, J, M, MX, PTX, QFX, SRX, T Series
- clear bfd session
- M, MX, T Series
- Configuring PIM and the Bidirectional Forwarding Detection (BFD) Protocol
show bfd session
Syntax
Syntax (EX Series Switch and QFX Series)
Release Information
Command introduced before Junos OS Release 7.4.
Options discriminator and address introduced in Junos OS Release 8.2.
Option prefix introduced in Junos OS Release 9.0.
Command introduced in Junos OS Release 12.1 for the QFX Series.
Description
Display information about active Bidirectional Forwarding Detection (BFD) sessions.
Options
none | — | (Same as brief) Display information about active BFD sessions. |
brief | detail | extensive | summary | — | (Optional) Display the specified level of output. |
address address | — | (Optional) Display information about the BFD session for the specified neighbor address. |
discriminator discriminator | — | (Optional) Display information about the BFD session using the specified local discriminator. |
logical-system (all | logical-system-name) | — | (Optional) Perform this operation on all logical systems or on a particular logical system. |
prefix address | — | (Optional) Display information about all of the BFD sessions for the specified LDP forwarding equivalence class (FEC). |
Required Privilege Level
view
Related Documentation
- ACX, M, MX, QFX, T Series
- Examples: Configuring BFD for Static Routes
- Example: Configuring BFD for OSPF
- Example: Configuring BFD for BGP
- ACX, J, M, MX, SRX, T Series
- Example: Configuring BFD for IS-IS
- EX, J, M, MX, PTX, QFX, SRX, T Series
- clear bfd session
- M, MX, T Series
- Configuring PIM and the Bidirectional Forwarding Detection (BFD) Protocol
List of Sample Output
show bfd sessionshow bfd session brief
show bfd session detail
show bfd session detail (with Authentication)
show bfd session address extensive
show bfd session extensive
show bfd session extensive (with Authentication)
show bfd session summary
Output Fields
Table 1 describes the output fields for the show bfd session command. Output fields are listed in the approximate order in which they appear.
Table 1: show bfd session Output Fields
Field Name | Field Description | Level of Output |
|---|---|---|
Address | Address on which the BFD session is active. | brief detail extensive none |
State | State of the BFD session: Up, Down, Init (initializing), or Failing. | brief detail extensive none |
Interface | Interface on which the BFD session is active. | brief detail extensive none |
Detect Time | Negotiated time interval, in seconds, used to detect BFD control packets. | brief detail extensive none |
Transmit Interval | Time interval, in seconds, used by the transmitting system to send BFD control packets. | brief detail extensive none |
Multiplier | Negotiated multiplier by which the time interval is multiplied to determine the detection time for the transmitting system. | detail extensive |
Session up time | How long a BFD session has been established. | detail extensive |
Client | Protocol for which the BFD session is active: ISIS, OSPF, or Static. | detail extensive |
TX interval | Time interval, in seconds, used by the host system to transmit BFD control packets. | brief detail extensive none |
RX interval | Time interval, in seconds, used by the host system to receive BFD control packets. | brief detail extensive none |
Authenticate | Indicates that BFD authentication is configured. | detail extensive |
keychain | Name of the security authentication keychain being used by a specific client. BFD authentication information for a client is provided in a single line and includes the keychain, algo, and mode parameters. Multiple clients can be configured on a BFD session. | extensive |
algo | BFD authentication algorithm being used for a specific client: keyed-md5, keyed-sha-1, meticulous-keyed-md5, meticulous-keyed-sha-1, or simple-password. BFD authentication information for a client is provided in a single line and includes the keychain, algo, and mode parameters. Multiple clients can be configured on a BFD session. | extensive |
mode | Level of BFD authentication enforcement being used by a specific client: strict or loose. Strict enforcement indicates that authentication is configured at both ends of the session (the default). Loose enforcement indicates that one end of the session might not be authenticated. BFD authentication information for a client is provided in a single line and includes the keychain, algo, and mode parameters. Multiple clients can be configured on a BFD session. | extensive |
Local diagnostic | Local diagnostic information about failing BFD sessions. | detail extensive |
Remote diagnostic | Remote diagnostic information about failing BFD sessions. | detail extensive |
Remote state | Reports whether the remote system's BFD packets have been received and whether the remote system is receiving transmitted control packets. | detail extensive |
Version | BFD version: 0 or 1. | extensive |
Replicated | The replicated flag appears when nonstop routing or graceful Routing Engine switchover is configured and the BFD session has been replicated to the backup Routing Engine. | detail 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. | extensive |
Adaptive async TX interval | Transmission interval being used because of adaptation. | extensive |
RX interval | Minimum required receive interval. | extensive |
Local min TX interval | Minimum amount of time, in seconds, between control packet transmissions on the local system. | extensive |
Local min RX interval | Minimum amount of time, in seconds, between control packet detections on the local system. | extensive |
Remote min TX interval | Minimum amount of time, in seconds, between control packet transmissions on the remote system. | extensive |
Remote min TX interval | Minimum amount of time, in seconds, between control packet detections on the remote system. | extensive |
Threshold transmission interval | Threshold for notification if the transmission interval increases. | extensive |
Threshold for detection time | Threshold for notification if the detection time increases. | extensive |
Local discriminator | Authentication code used by the local system to identify that BFD session. | extensive |
Remote discriminator | Authentication code used by the remote system to identify that BFD session. | extensive |
Echo mode | Information about the state of echo transmissions on the BFD session. | extensive |
Prefix | LDP FEC address associated with the BFD session. | All levels |
Egress, Destination | Displays the LDP FEC destination address. This field is displayed only on a router at the egress of an LDP FEC, where the BFD session has an LDP Operation, Administration, and Maintenance (OAM) client. | All levels |
Remote is control-plane independent | The BFD session on the remote peer is running on its Packet Forwarding Engine. In this case, when the remote node undergoes a graceful restart, the local peer can help the remote peer with the graceful restart. The following BFD sessions are not distributed to the Packet Forwarding Engine: multihop sessions, tunnel-encapsulated sessions, and sessions over aggregated Ethernet and integrated routing and bridging (IRB) interfaces. | extensive |
Authentication | Summary status of BFD authentication:
This information is only shown if BFD authentication is configured. | extensive |
Session ID | The BFD session ID number that represents the protection using MPLS fast reroute (FRR) and loop-free alternate (LFA). | detail extensive |
sessions | Total number of active BFD sessions. | All levels |
clients | Total number of clients that are hosting active BFD sessions. | All levels |
Cumulative transmit rate | Total number of BFD control packets transmitted per second on all active sessions. | All levels |
Cumulative receive rate | Total number of BFD control packets received per second on all active sessions. | All levels |
Multi-hop, min-recv-TTL | Minimum time to live (TTL) accepted if the session is configured for multihop. | extensive |
route table | Route table used if the session is configured for multihop. | extensive |
local address | Local address of the source used if the session is configured for multihop. | extensive |
Sample Output
show bfd session
user@host> show bfd sessionTransmit Address State Interface Detect Time Interval Multiplier 10.9.1.33 Up so-7/1/0.0 0.600 0.200 3 10.9.1.29 Up ge-4/0/0.0 0.600 0.200 3 2 sessions, 2 clients Cumulative transmit rate 10.0 pps, cumulative receive rate 10.0 pps
show bfd session brief
The output for the show bfd session brief command is identical to that for the show bfd session command. For sample output, see show bfd session.
show bfd session detail
user@host> show bfd session detailTransmit Address State Interface Detect Time Interval Multiplier 10.9.1.33 Up so-7/1/0.0 0.600 0.200 3 Client OSPF, TX interval 0.200, RX interval 0.200, multiplier 3 Session up time 3d 00:34 Local diagnostic None, remote diagnostic None Remote state Up, version 1 Replicated 10.9.1.29 Up ge-4/0/0.0 0.600 0.200 3 Client ISIS L2, TX interval 0.200, RX interval 0.200, multiplier 3 Session up time 3d 00:29, previous down time 00:00:01 Local diagnostic NbrSignal, remote diagnostic AdminDown Remote state Up, version 1 2 sessions, 2 clients Cumulative transmit rate 10.0 pps, cumulative receive rate 10.0 pps
show bfd session detail (with Authentication)
user@host> show bfd session detailTransmit Address State Interface Detect Time Interval Multiplier 10.9.1.33 Up so-7/1/0.0 0.600 0.200 3 Client OSPF, TX interval 0.200, RX interval 0.200, multiplier 3, Authenticate Session up time 3d 00:34 Local diagnostic None, remote diagnostic None Remote state Up, version 1 Replicated 10.9.1.29 Up ge-4/0/0.0 0.600 0.200 3 Client ISIS L2, TX interval 0.200, RX interval 0.200, multiplier 3 Session up time 3d 00:29, previous down time 00:00:01 Local diagnostic NbrSignal, remote diagnostic AdminDown Remote state Up, version 1 2 sessions, 2 clients Cumulative transmit rate 10.0 pps, cumulative receive rate 10.0 pps
show bfd session address extensive
user@host> show bfd session 10.255.245.212 extensive Transmit Address State Interface Detect Time Interval Multiplier 10.255.245.212 Up 1.200 0.400 3 Client Static, TX interval 0.400, RX interval 0.400, multiplier 3 Session up time 00:17:03, previous down time 00:00:14 Local diagnostic CtlExpire, remote diagnostic NbrSignal Remote state Up, version 1 Replicated Min async interval 0.400, min slow interval 1.000 Adaptive async tx interval 0.400, rx interval 0.400 Local min tx interval 0.400, min rx interval 0.400, multiplier 3 Remote min tx interval 0.400, min rx interval 0.400, multiplier 3 Threshold transmission interval 0.000, Threshold for detection time 0.000 Local discriminator 6, remote discriminator 16 Echo mode disabled/inactive Multi-hop, min-recv-TTL 255, route-table 0, local-address 10.255.245.205 1 sessions, 1 clients Cumulative transmit rate 2.5 pps, cumulative receive rate 2.5 pps
show bfd session extensive
user@host> show bfd session extensive 10.31.1.2 Up ge-2/1/8.0 0.030 0.010 3
Client OSPF realm ospf-v2 Area 0.0.0.0, TX interval 0.010, RX interval 0.010
Session up time 00:10:13
Local diagnostic None, remote diagnostic None
Remote state Up, version 1
Replicated
Min async interval 0.010, min slow interval 1.000
Adaptive async TX interval 0.010, RX interval 0.010
Local min TX interval 0.010, minimum RX interval 0.010, multiplier 3
Remote min TX interval 0.010, min RX interval 0.010, multiplier 3
Local discriminator 12, remote discriminator 4
Echo mode disabled/inactive
Remote is control-plane independent
Session ID: 0x201
Detect Transmit
Address State Interface Time Interval Multiplier
10.31.2.2 Up ge-2/1/4.0 0.030 0.010 3
Client OSPF realm ospf-v2 Area 0.0.0.0, TX interval 0.010, RX interval 0.010
Session up time 00:10:14
Local diagnostic None, remote diagnostic NbrSignal
Remote state Up, version 1
Replicated
Min async interval 0.010, min slow interval 1.000
Adaptive async TX interval 0.010, RX interval 0.010
Local min TX interval 0.010, minimum RX interval 0.010, multiplier 3
Remote min TX interval 0.010, min RX interval 0.010, multiplier 3
Local discriminator 13, remote discriminator 5
Echo mode disabled/inactive
Remote is control-plane independent
Session ID: 0x202
2 sessions, 2 clients
Cumulative transmit rate 200.0 pps, cumulative receive rate 200.0 ppsshow bfd session extensive (with Authentication)
user@host> show bfd session extensive Detect Transmit
Address State Interface Time Interval Multiplier
192.168.208.26 Up so-1/0/0.0 2.400 0.800 10
Client Static, TX interval 0.600, RX interval 0.600, Authenticate
keychain bfd, algo keyed-md5, mode loose
Session up time 00:18:07
Local diagnostic None, remote diagnostic NbrSignal
Remote state Up, version 1
Replicated
Min async interval 0.600, min slow interval 1.000
Adaptive async TX interval 0.600, RX interval 0.600
Local min TX interval 0.600, minimum RX interval 0.600, multiplier 10
Remote min TX interval 0.800, min RX interval 0.800, multiplier 3
Local discriminator 2, remote discriminator 3
Echo mode disabled/inactive
Authentication enabled/active, keychain bfd, algo keyed-md5, mode loose
1 sessions, 1 clients
Cumulative transmit rate 1.2 pps, cumulative receive rate 1.2 pps
show bfd session summary
user@host> show bfd session summary2 sessions, 2 clients Cumulative transmit rate 10.0 pps, cumulative receive rate 10.0 pps
Published: 2013-03-14
Supported Platforms
Related Documentation
- ACX, M, MX, QFX, T Series
- Examples: Configuring BFD for Static Routes
- Example: Configuring BFD for OSPF
- Example: Configuring BFD for BGP
- ACX, J, M, MX, SRX, T Series
- Example: Configuring BFD for IS-IS
- EX, J, M, MX, PTX, QFX, SRX, T Series
- clear bfd session
- M, MX, T Series
- Configuring PIM and the Bidirectional Forwarding Detection (BFD) Protocol
