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flow-table-size

 

Syntax

Hierarchy Level

Release Information

Statement introduced in Junos OS Release 12.1.

ipv6-extended-attrib option added in Junos OS Release 14.2 for MX Series routers.

vpls-flow-table-size option added in Junos OS Release 13.2 for MX Series routers.

bridge-flow-table-size option added in Junos OS Release 18.2R1 for MX Series routers.

Description

Configure the size of hash tables for inline services sampling.

Starting with Junos OS Release 15.1F2, by default, the software allocates one 1K IPv4 flow table. To allocate 15 256K IPv4 flow tables, the former default, you can enter this configuration from the [edit] hierarchy level:

Note

The recommended flow table size is 4 so that it can scale up to 4x256K flows, which is 1M. You can configure more, however, the system will issue a warning message.

Note

Starting from Junos OS Release 16.1R1 and 15.1F2, any changes in the configured size of the flow table needs a reboot of the FPC. We recommend that you run this command during a maintenance window. The maximum supported flow table size for a combination of both IPv4 and IPv6 is 15. For example, you can set the flow table size for IPv4 to 10 and set the size for IPv6 to 5. Verify that you have sized the hash tables adequately for IPv4 and IPv6 flow sampling.

The remaining statements are defined separately.

Required Privilege Level

interface—To view this statement in the configuration.

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