This command enables or disables the overload bit feature while the specified IS-IS process is initializing.
| area_name | Specifies the area name of the IS-IS process for which this feature is to be enabled or disabled. |
| off | Disables the overload bit feature during initialization. |
| suppress | Specifies that one or all types of reachability information is to be suppressed or excluded from LSPs during initialization. |
| external | When included with the suppress option, this specifies that external reachability information is to be excluded from LSPs during initialization. |
| interlevel | When included with the suppress option, this specifies that interlevel reachability information is to be excluded from LSPs during initialization. |
| all | When included with the suppress option, this specifies that external and interlevel reachability information is to be excluded from LSPs during initialization. |
| seconds | Specifies the period (in seconds) during which this feature is enabled at initialization. |
Off.
This command configures the overload bit to be set only while the configured router is initializing, and only for the period of time specified. This can be useful to minimize network churn while a new router joins and learns the topology. The suppress options are used during startup if the router process is level 1/level 2 or is running another protocol, such as BGP (in order to wait for the other protocol to converge). Note that in the latter case, there is no signaling between protocols to indicate convergence. Again, this can reduce churn while the topologies are learned during router initialization.
Note
Although enable isis area area_name overload-bit {suppress [external | interlevel | all]} and disable isis area area_name overload-bit override the overload bit behavior configured by the configure isis area area_name overload-bit on-startup [ off | {suppress [external | interlevel | all]}seconds] command, the enable and disable commands do not modify the configured parameters.
The following command enables the areax overload bit feature for 15 seconds during initialization:
configure isis area areax overload-bit on-startup 15
This command was first available in ExtremeXOS 12.1.
This command is available on platforms with a Core or Premier license as described in the ExtremeXOS and Switch Engine 31.7 Feature License Requirements document.