Users Guide

● lag—Enables the LAG hash configuration for Layer 2 (L2) only.
● seed—Changes the hash algorithm seed value to get a better hash value.
● seed-value—Enter a hash algorithm seed value, from 0 to 4294967295.
● crc—Enables the cyclic redundancy check (CRC) polynomial for hash computation.
● crc16cc—16 bit CRC16 using CRC16-CCITT polynomial
● crc32LSB—LSB 16 bits of computed CRC32(default)
● crc32MSB—MSB 16 bits of computed CRC32
● xor — Enables upper 8 bits of CRC and lower 8 bits of XOR value for computation.
● xor1—Enables upper 8 bits of CRC16-BISYNC and lower 8 bits of xor1
● xor2—Enables upper 8 bits of CRC16-BISYNC and lower 8 bits of xor2
● xor4—Enables upper 8 bits of CRC16-BISYNC and lower 8 bits of xor4
● xor8—Enables upper 8 bits of CRC16-BISYNC and lower 8 bits of xor8
● random — Enables a hash algorithm random seed value for ECMP or LAG hash computation.
Default
crc
Command Mode CONFIGURATION
Usage
Information
The hash value calculated with this command is unique to the entire system. Different hash algorithms are
based on the number of port-channel members and packet values. The default hash algorithm yields the
most balanced results in various test scenarios, but if the default algorithm does not provide a
satisfactory distribution of traffic, use this command to designate another algorithm.
When a port-channel member leaves or is added to the port-channel, the hash algorithm recalculates to
balance traffic across the members. The no version of this command returns the value to the default.
Example
OS10(config)# hash-algorithm lag crc
Supported
Releases
10.3.0E or later
ip ecmp-group maximum-paths
Configures the maximum number of ECMP paths per route.
Syntax
ip ecmp-group maximum-paths number
Parameters number — Enter the maximum number of ECMP paths, from 2 to 128.
Default 64
Command Mode CONFIGURATION
Usage
Information
To save the new ECMP settings, use the write memory command, then reload the system for the new
settings to take effect. The no version of this command returns the value to the default.
Example
OS10# configure terminal
OS10(config)# ip ecmp-group maximum-paths 2
OS10(config)# exit
OS10# write memory
OS10# reload
Supported
Releases
10.4.3.0 or later
link-bundle-utilization trigger-threshold
Configures a threshold value to trigger traffic monitoring distribution on an ECMP link bundle.
Syntax
link-bundle-utilization trigger-threshold value
Parameters value — Enter a link bundle trigger threshold value, from 0 to 100.
Layer 3 887