Administrator Guide

• Modify the threshold for monitoring ECMP group bundles.
CONFIGURATION mode
link-bundle-distribution trigger-threshold {percent}
The range is from 1 to 90%.
The default is 60%.
• Display details for an ECMP group bundle.
EXEC mode
show link-bundle-distribution ecmp-group ecmp-group-id
The range is from 1 to 64.
Viewing an ECMP Group
NOTE: An ecmp-group index is generated automatically for each unique ecmp-group when you congure multipath routes to the
same network. The system can generate a maximum of 512 unique ecmp-groups. The ecmp-group indices are generated in even
numbers (0, 2, 4, 6... 1022) and are for information only.
You can congure ecmp-group with id 2 for link bundle monitoring. This ecmp-group is dierent from the ecmp-group index 2 that is
created by conguring routes and is automatically generated. These two ecmp-groups are not related in any way.
Dell(conf-ecmp-group-5)#show config
!
ecmp-group 5
interface tengigabitethernet 1/2
interface tengigabitethernet 1/3
link-bundle-monitor enable
Dell(conf-ecmp-group-5)#
RTAG7
RTAG7 is a hashing algorithm that load balances the trac within a trunk group in a controlled manner. In order to eectively increase the
bandwidth of the LAG/Equal Cost Multiple Path routes, trac is balanced across the member links. The balancing is performed by using
the RTAG7 hashing, which is designed to have the member links used eciently as the trac prole gets more diverse.
Hashing-based load
balancing is used in the following applications:
• L3 ECMP
• LAGs
• HiGig trunking
The RTAG7 hash scheme generates a hash that consists of the following two portions:
• The rst portion is primarily generated from packet headers to identify micro-ows in the trac. The Parameters that are considered
for hash computations by default in RTAG7 hashing is shown in the given example:
Dell#show load-balance
Load-Balancing Configuration For LAG & ECMP:
--------------------------------------------
IPV4 Load Balancing Enabled
IPV4 FIELDS : source-ipv4 dest-ipv4 vlan protocol L4-source-port L4-dest-port
IPV6 Load Balancing Enabled
IPV6 FIELDS : source-ipv6 dest-ipv6 vlan protocol L4-source-port L4-dest-port
Mac Load Balancing Enabled
MAC FIELDS : source-mac dest-mac vlan ethertype
Load Balancing Configuration for tunnels
ipv4-over-ipv4 Payload header
ipv4-over-ipv6 Payload header
ipv6-over-ipv6 Payload header
314
Equal Cost Multi-Path (ECMP)