Supported Platforms
Related Documentation
maximum-prefixes
Syntax
Hierarchy Level
Release Information
Statement introduced in Junos OS Release 8.0.
Statement introduced in Junos OS Release 9.0 for EX Series switches.
Statement introduced in Junos OS Release 11.3 for the QFX Series.
Description
Configure a limit for the number of routes installed in a routing table based upon the route prefix.
Using a prefix limit, you can curtail the number of prefixes received from a CE router in a VPN. Prefix limits apply only to dynamic routing protocols and are not applicable to static or interface routes.
 | Note: The maximum-prefixes statement is similar to the maximum-paths statement. The maximum-prefixes statement limits the number of unique destinations in a routing instance. For example, suppose a routing instance has the following routes: OSPF 10.10.10.0/24 ISIS 10.10.10.0/24 These are two routes, but only one destination (prefix). The maximum-paths limit applies the total number of routes (two). The maximum-prefixes limit applies to the total number of unique prefixes (one). |
Options
log-interval seconds—(Optional) Minimum time interval (in seconds) between log messages.
Range: 5 through 86,400
log-only—(Optional) Sets the prefix limit as an advisory limit. An advisory limit triggers only a warning, and additional routes are not rejected.
prefix-limit—Maximum number of route prefixes. If this limit is reached, a warning is triggered and any additional routes are rejected.
Range: 1 through 4,294,967,295
Default: No default
threshold value—(Optional) Percentage of the maximum number of prefixes that starts triggering a warning. You can configure a percentage of the prefix-limit value that starts triggering the warnings.
Range: 1 through 100
| Note: When the number of routes reaches the threshold value, routes are still installed into the routing table while warning messages are sent. When the number of routes reaches the prefix-limit value, then additional routes are rejected. |
Required Privilege Level
routing—To view this statement in the configuration.
routing-control—To add this statement to the configuration.
