Deleting Or Disabling A Port Channel; Load Balancing Through Port Channels; Changing The Hash Algorithm - Dell C9000 Series Networking Configuration Manual

Hide thumbs Also See for C9000 Series:

Table of Contents

secondary: the IP address is the interface's backup IP address. You can configure up to eight

secondary IP addresses.

Deleting or Disabling a Port Channel

To delete or disable a port channel, use the following commands.

Delete a port channel.

CONFIGURATION mode

no interface portchannel channel-number

Disable a port channel.

When you disable a port channel, all interfaces within the port channel are operationally down also.

The system uses hash algorithms for distributing traffic evenly over channel members in a port channel (LAG).

The hash algorithm distributes traffic among electronic commerce messaging protocol (ECMP) paths and

LAG members. The distribution is based on a flow, except for packet-based hashing. A flow is identified by the

hash and is assigned to one link. In packet-based hashing, a single flow can be distributed on the LAG and

uses one link.

Packet based hashing is used to load balance traffic across a port-channel based on the IP Identifier field

within the packet. Load balancing uses source and destination packet information to get the greatest

advantage of resources by distributing traffic over multiple paths when transferring data to a destination.

The system allows you to modify the hashing algorithms used for flows and for fragments. The load-balance

and hash-algorithm commands are available for modifying the distribution algorithms.

The load-balance command selects the hash criteria applied to port channels.

If you do not obtain even distribution with the load-balance command, you can use the hash-algorithm

command to select the hash scheme for LAG, ECMP and NH-ECMP. You can rotate or shift the 12–bit Lag

Hash until the desired hash is achieved.

To change to another algorithm, use the second command.

Change the default (0) to another algorithm and apply it to ECMP, LAG hashing, or a particular line card.

CONFIGURATION mode

hash-algorithm {ecmp {crc16 | crc16cc | crc32MSB | crc32LSB | crc–upper | dest-

ip | lsb | xor1 | xor2 | xor4 | xor8 | xor16} hg {crc16 | crc16cc | crc32MSB |

crc32LSB | xor1 | xor2 | xor4 | xor8 | xor16} {hg-seed seed-value} lag {crc16 |

crc16cc | crc32MSB | crc32LSB | xor1 | xor2 | xor4 | xor8 | xor16} | seed seed-

value} linecard slot-id | port-set port-pipe