Users Guide

• Configure an IP address and mask on the interface.
INTERFACE mode
ip address ip-address mask [secondary]
• ip-address mask: enter an address in dotted-decimal format (A.B.C.D). The mask must be in slash
format (/24).
• 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.
shutdown
When you disable a port channel, all interfaces within the port channel are operationally down also.
Load Balancing Through Port Channels
Dell Networking OS uses hash algorithms for distributing traffic evenly over channel members in a port
channel (LAG).
The hash algorithm distributes traffic among Equal Cost Multi-path (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.
Dell Networking OS 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.
Load-Balancing Method
By default, LAG hashing uses the source IP, destination IP, source transmission control protocol (TCP)/user
datagram protocol (UDP) port, and destination TCP/UDP port for hash computation. For packets without a
Layer 3 header, Dell Networking OS automatically uses load-balance mac source-dest-mac.
Do not configure IP hashing or MAC hashing at the same time. If you configure an IP and MAC hashing
scheme at the same time, the MAC hashing scheme takes precedence over the IP hashing scheme.
To change the IP traffic load-balancing default, use the following command.
Interfaces 395