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xor4 | xor8 | xor16}[[hg {crc16 | crc16cc | crc32MSB | crc32LSB | xor1 | xor2 | xor4 | xor8 |

xor16}]| [lag {crc16 | crc16cc | crc32MSB | crc32LSB | xor1 | xor2 | xor4 | xor8 | xor16 }]

[stack-unit|linecard number | port-set number | [hg—seed seed-value | seedseed-value

For more information about algorithm choices, refer to the command details in the IP Routing chapter of the Dell Networking OS

Command Reference Guide.

• Change the Hash algorithm seed value to get better hash value

Hash seed is used to compute the hash value. By default hash seed is chassis MAC 32 bits. we can also change the hash seed by the

following command.

CONFIGURATION mode

hash-algorithm seed {seed value}

• Change to another algorithm.

CONFIGURATION mode

Example of the hash-algorithm Command

Dell(conf)#hash-algorithm ecmp xor1 lag crc16

Dell(conf)#

The hash-algorithm command is specic to ECMP group. The default ECMP hash conguration is crc-lower. This command takes the

lower 32 bits of the hash key to compute the egress port. Other options for ECMP hash-algorithms are:

• crc16 — uses 16 bit CRC16-bisync polynomial

• crc16cc — uses 16 bit CRC16 using CRC16-CCITT polynomial

• crc32LSB — uses LSB 16 bits of computed CRC32

• crc32MSB — uses MSB 16 bits of computed CRC32(default)

• crc-upper — uses the upper 32 bits of the hash key to compute the egress port.

• dest-ip — uses destination IP address as part of the hash key.

xor4 |xor8 | xor16.

• lsb —always uses the least signicant bit of the hash key to compute the egress port.

• xor1 — uses Upper 8 bits of CRC16-BISYNC and lower 8 bits of xor1

• xor2 — Upper 8 bits of CRC16-BISYNC and lower 8 bits of xor2

• xor4 —Upper 8 bits of CRC16-BISYNC and lower 8 bits of xor4

• xor8 — Upper 8 bits of CRC16-BISYNC and lower 8 bits of xor8

• xor16 — uses 16 bit XOR.

Server Ports

By default, the switch allows the server ports to come up as switch ports in no shut mode, ready to switch trac.

Default Conguration without Start-up Cong

This feature is enabled by default and can be enabled on reload by deleting the start-up cong le.

On reload, all the server ports (1-32) come up as switch ports in No Shut mode. Uplinks remain in Shut mode ensuring that there are no

network loops.

With this feature, you can install servers and test their connectivity by running applications on the servers, even before conguring VLAN

membership, STP on all interfaces or uplinks.

Interfaces

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