Hello Elmer
There is a detail description of this in the EXOS Command Reference guide 15_4 page 2336.
Here's a brief summary
The ECMP hash uses CRC based on SIP, DIP and (by default), the L4 port numbers. If you
want, you can choose to exclude L4 port numbers by configuring "L3" using this XOS CLI
command:
configure forwarding sharing [L3 | L3_L4]
ECMP support L3
Uses only Layer 3 IP addresses to select ECMP routes and load-sharing ports.
L3_L4 (Default)
Uses Layer 3 IP addresses and Layer 4 TCP/UDP port numbers, if present, to select
ECMP routes and load-sharing ports
You can download the command reference guide at
http://www.extremenetworks.com/support/extreme-support/documentation/
Hope that helps
P
