Tuning ISIS-SPB adjacency maintenance settings
ISIS-SPB uses the ISIS-SPB hello interval and the hello multiplier for adjacency establishment and maintenance.
Adjacency hold time sets the maximum amount of time for one SPBM node to retain the adjacency with another. This timer determines the amount of time it takes for an SPBM node to detect a failed link.
The adjacency hold time equals the ISIS-SPB hello interval multiplied by the hello multiplier.
An SPBM node sends its adjacency hold time in hello packets to update the adjacencies with its neighbor. The neighbor removes the adjacency with the advertising node and recalculates routes if it does not receive a hello packet before the timer expires.
Setting the ISIS-SPB hello interval
ISIS-SPB sends hellos over links to establish and maintain adjacencies between SPBM nodes.
A short interval improves network convergence time, but it requires more system resources.
To set the ISIS-SPB hello interval on an interface:
Step | Command | Remarks |
|---|---|---|
1. Enter system view. | system-view | N/A |
2. Enter Layer 2 Ethernet interface view or Layer 2 aggregate interface view. | interface interface-type interface-number | N/A |
3. Set the ISIS-SPB hello interval. | spbm timer hello seconds | The default hello interval is 10 seconds. The maximum adjacency hold time is 65535 seconds. If this value is exceeded, the original hello interval remains unchanged. |
Setting the hello multiplier for calculating the adjacency hold time
To set the multiplier for calculating the adjacency hold time on an interface:
Step | Command | Remarks |
|---|---|---|
1. Enter system view. | system-view | N/A |
2. Enter Layer 2 Ethernet interface view or Layer 2 aggregate interface view. | interface interface-type interface-number | N/A |
3. Set the hello multiplier. | spbm timer holding-multiplier value | The default multiplier is 3. The maximum adjacency hold time is 65535 seconds. If this value is exceeded, the original hello multiplier remains unchanged. |