display isis bfd session
Function
The display isis bfd session command displays information about dynamic BFD sessions.
Only the S5720-EI, S5720-HI, S5730-HI, S5731-H, S5731-S, S5731S-H, S5731S-S, S5732-H, S6720-EI, S6720-HI, S6720S-EI, S6730-H, S6730S-H, S6730-S, and S6730S-S support this command.
Format
display isis [ process-id | vpn-instance vpn-instance-name ] bfd session { all | peer ip-address | interface interface-type interface-number }
Parameters
| Parameter | Description | Value |
|---|---|---|
| process-id | Specifies an IS-IS process ID. | The value is an integer that ranges from 1 to 65535. |
| vpn-instance vpn-instance-name | Specifies the IS-IS multi-instance process in a specified VPN instance. | The value must be an existing VPN instance name. |
| all | Specifies all IS-IS interfaces in the IS-IS process. | - |
| peer ip-address | Specifies the IP address of a neighbor. | The value is in dotted decimal notation. |
| interface interface-type interface-number | Specifies the interface on which BFD session statistics need to be collected. | - |
Usage Guidelines
BFD can provide millisecond-level fault detection. It can work with IS-IS to fast detect faults on neighboring devices and instruct IS-IS to recalculate routes for correct packet forwarding. You can run the display isis bfd session command to check information about dynamic BFD sessions.
Example
# Display information about dynamic BFD sessions.
<HUAWEI> display isis bfd session all
BFD session information for ISIS(1)
-----------------------------------
Peer System ID : 0000.0000.0002 Interface : Vlanif10
TX : 1000 BFD State : up Peer IP Address : 10.1.1.2
RX : 1000 LocDis : 8194 Local IP Address: 10.1.1.1
Multiplier : 3 RemDis : 8197 Type : L1
Diag : No diagnostic information
Total BFD session(s) : 1
Item |
Description |
|---|---|
Peer System ID |
System ID of the neighbor. |
Interface |
Local IS-IS interface connected to the neighbor. |
TX |
Negotiated minimum interval for transmitting BFD packets. |
BFD State |
BFD session status: Up or Down. |
Peer IP Address |
IP address of the remote IS-IS interface. |
RX |
Negotiated minimum interval for receiving BFD packets. |
LocDis |
Local discriminator dynamically assigned by BFD. |
Local IP Address |
IP address of the local IS-IS interface. |
Multiplier |
Remote detection multiplier. |
RemDis |
Remote identifier dynamically assigned by BFD. |
Type |
Level of the neighbor:
|
Diag |
Diagnostic information. "No diagnostic information" indicates that BFD runs properly and no diagnostic information is displayed. |
Total BFD session (s) |
Total number of BFD sessions. |