Configuring Hardware Routing Table Usage

Note

This procedure applies only to BlackDiamond X8 and 8000 series modules and Summit X440, X460, X480, X670, X670-G2, and X770 switches.

Allowing individual local and remote IPv4 unicast hosts to occupy the unused portion of the Longest Prefix Match (LPM) table helps reduce Layer 3 hardware hash table collisions, and reduces slowpath forwarding of IP unicast and multicast traffic. For more information, see “Hardware Routing Table Management” on page 1262.

To configure the number of IP routes to reserve in the LPM hardware table, use the command:
configure iproute reserved-entries [ num_routes_needed | maximum | default ] slot [all | slot_num]
To display the current configuration for IP route reserved entries, use the command:.
show iproute reserved-entries {slot slot_num}
To display the hardware table usage for IP routes, unicast and multicast, use the command:
show iproute reserved-entries statistics {slot slot_num }

Published March 2020prev | next

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