Hash-Algorithm Hg - Dell Z9500 Command Reference Manual

Term heading Description heading
The different hash algorithms are based on the number of ECMP group 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 satisfactory
distribution of traffic, use this command to designate another algorithm.
When a member leaves or is added to the ECMP group, the hash algorithm is
recalculated to balance traffic across the members.

hash-algorithm hg

To distribute traffic flows across different internal HiGig links, change the hash algorithm.
Z9500
Syntax
hash-algorithm hg {crc16 | xor1 | xor2 | xor4 | xor8 | xor16 |
crc16cc | crc32MSB | crc32LSB} linecard slot-id port-set port-
pipe
Parameters
crc16
xor1
xor2
xor4
xor8
xor16
crc16cc
crc32MSB
crc32LSB
linecard slot-id
port-set port-
pipe
Equal Cost Multi-Path (ECMP)
Use CRC16_BISYNC — 16 bit CRC16-bisync polynomial
(default).
Use CRC16_BISYNC_AND_XOR1 — Upper 8 bits of CRC16-
BISYNC and lower 8 bits of xor1.
Use CRC16_BISYNC_AND_XOR2 — Upper 8 bits of CRC16-
BISYNC and lower 8 bits of xor2.
Use CRC16_BISYNC_AND_XOR4 — Upper 8 bits of CRC16-
BISYNC and lower 8 bits of xor4.
Use CRC16_BISYNC_AND_XOR8 — Upper 8 bits of CRC16-
BISYNC and lower 8 bits of xor8.
Use CR16 — 16 bit XOR.
Use CRC16_CCITT — 16 bit CRC16 using CRC16-CCITT
polynomial.
Use CRC32_UPPER — MSB 16 bits of computed CRC32.
Use CRC32_LOWER — LSB 16 bits of computed CRC32.
Enter the line-card slot ID and port-pipe number for the set
of ports for which you want to redistribute traffic flows. The
range of Z9500 slot IDs is 0 to 2. The range of port-pipe
numbers is: 0 to 2 on line card 0; 0 to 3 on line cards 1 and
2.
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