display pim ipv6 bfd session

Function

The display pim ipv6 bfd session command displays information about PIM IPv6 BFD sessions.

Format

display pim ipv6 bfd session statistics

display pim ipv6 bfd session [ interface interface-type interface-number | neighbor ipv6-link-local-address ]^*

Parameters

Parameter	Description	Value
statistics	Displays statistics about PIM IPv6 BFD sessions.	-
interface interface-type interface-number	Displays information about PIM IPv6 BFD sessions on a specified interface. interface-type interface-number specifies the type and number of an interface.	-
neighbor ipv6-link-local-address	Displays information about PIM IPv6 BFD sessions on a specified neighbor. ipv6-link-local-address specifies the link-local address of a PIM neighbor.	The value ranges from FE80:: to FE80:FFFF:FFFF:FFFF:FFFF:FFFF:FFFF:FFFF, in hexadecimal notation.

Views

All views

Default Level

1: Monitoring level

Usage Guidelines

Usage Scenario

After PIM BFD (IPv6) is configured to detect the status of PIM neighbors, a PIM IPv6 BFD session needs to be established. The display pim ipv6 bfd session command can be used to view statistics about and configurations of PIM IPv6 BFD sessions.

Precautions

The two ends of a BFD session negotiate the actual interval at which PIM IPv6 BFD packets are sent, the interval at which PIM IPv6 BFD packets are received, and the detection period based on the following negotiation mechanisms:

The formula used to calculate the interval for sending PIM IPv6 BFD packets and the formula used to calculate the interval for receiving PIM IPv6 BFD packets are as follows:
- Interval for sending PIM IPv6 BFD packets = Max (Local min-tx-interval, Remote min-rx-interval)
- Interval for receiving PIM IPv6 BFD packets = Max (Remote min-tx-interval, Local min-rx-interval)
The formula used to calculate the detection period is as follows:
- Detection period = Remote detect-multiplier x Max (Remote min-tx-interval, Local min-rx-interval)

Example

# Display information about PIM IPv6 BFD sessions on all interfaces.

<HUAWEI> display pim ipv6 bfd session
 VPN-Instance: public net
 Total 1 BFD session Created

 Vlanif100 (FE80::7): Total 1 BFD session Created

 Neighbor        ActTx(ms) ActRx(ms) ActMulti Local/Remote State
 FE80::6         200       300       4         8211/8214   Up

# Display information about the PIM IPv6 BFD session on VLANIF 100.

<HUAWEI> display pim ipv6 bfd session interface vlanif 100
 VPN-Instance: public net

 Vlanif100 (FE80::7): Total 1 BFD session Created

 Neighbor        ActTx(ms) ActRx(ms) ActMulti Local/Remote State
 FE80::6         200       300       4         8211/8214   Up

**Table 1** Description of the **display pim ipv6 bfd session** command output
Item	Description
Total 1 BFD session Created	Total number of established PIM IPv6 BFD sessions.
Vlanif100 (FE80::7)	PIM interface name (Link-local address).
Neighbor	IPv6 link-local address of a PIM neighbor.
ActTx(ms)	Actual interval for sending PIM IPv6 BFD packets.
ActRx(ms)	Actual interval for receiving PIM IPv6 BFD packets.
ActMulti	Actual detection multiplier of PIM IPv6 BFD packets.
Local/Remote	Local/remote discriminator of a PIM IPv6 BFD session.
State	Status of a PIM IPv6 BFD session: Up: indicates that the BFD session is set up successfully and detection packets are periodically exchanged. Init: indicates that the local end can communicate with the remote end and wants the session status to be Up. Admin down: indicates that the session is in the administratively Down state (The shutdown command is run in the BFD session view). Down: indicates that the BFD session is down.

# Display statistics about PIM IPv6 BFD sessions.

<HUAWEI> display pim ipv6 bfd session statistics
 VPN-Instance: public net
  Total 1 PIM BFD session in this instance.

   Total 1 PIM BFD session up.
   Total 0 PIM BFD session down.

**Table 2** Description of the display pim ipv6 bfd session statistics command output
Item	Description
Total 1 PIM BFD session in this instance	Total number of PIM IPv6 BFD session.
Total 1 PIM BFD session up	Total number of PIM IPv6 BFD sessions in the Up state.
Total 0 PIM BFD session down	Total number of PIM IPv6 BFD sessions in the Down state, that is, the total number of PIM IPv6 BFD sessions minus the number of PIM IPv6 BFD sessions in the Up state.