prefix-limit

Syntax

Hierarchy Level

Description

Limit the number of prefixes received on a BGP peer session and a rate-limit logging when injected prefixes exceed a set limit.

This functionality is identical to the accepted-prefix-limit functionality except that it operates against received prefixes rather than accepted prefixes.

Options

`maximum number`	When you set the maximum number of prefixes, a message is logged when that number is exceeded. Range: 1 through 4,294,967,295 (2³² – 1)
`teardown <percentage>`	(Optional) If you include the `teardown` statement, the session is torn down when the maximum number of prefixes is reached. If you specify a percentage, messages are logged when the number of prefixes exceeds that percentage. After the session is torn down, it is reestablished in a short time unless you include the `idle-timeout` statement. Then the session can be kept down for a specified amount of time, or forever. If you specify `forever`, the session is reestablished only after you issue a `clear bgp neighbor` command. If the `teardown` statement is not configured, a message is logged when the number of prefixes exceeds the value configured for the `maximum` option. Range: 1 through 100
`idle-timeout (forever \| timeout-in-minutes)`	(Optional) If you include the `idle-timeout` statement, the session is torn down for a specified amount of time, or forever. If you specify a period of time, the session is allowed to reestablish after this timeout period. If you specify `forever`, the session is reestablished only after you intervene with a `clear bgp neighbor` command. Range: 1 through 2400
`drop-excess <percentage>`	(Optional) If you include the `drop-excess <percentage>` option, the excess routes are dropped when the maximum number of prefixes is reached. If you specify a percentage, the routes are logged when the number of prefixes exceeds that percentage value of the maximum number.
`hide-excess <percentage>`	(Optional) If you include the `hide-excess <percentage>` option, the excess routes are hidden when the maximum number of prefixes is reached. If you specify a percentage, the routes are logged when the number of prefixes exceeds that percentage value of the maximum number. If the percentage is modified, the routes are re-evaluated automatically. If the active routes drop below the specified percentage, those routes are kept as hidden. To recover the routes from the hidden state, run the following commands to refresh the routes and get a complete re-evaluation of the routes: `clear bgp table <table-name>` and `clear bgp neighbor <neighbor address> soft-inbound`

Note:

You can include either the teardown <percentage>, drop-excess <percentage>, or hide-excess <percentage> statement option one at a time.

Required Privilege Level

routing—To view this statement in the configuration.

routing-control—To add this statement to the configuration.

Release Information

Statement introduced before Junos OS Release 7.4.

drop-excess <percentage> and hide-excess <percentage> options introduced in Junos OS Release 21.2.

drop-excess <percentage> and hide-excess <percentage> options introduced in Junos OS Evolved Release 21.3R1.

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