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•
Source/Destination IP and source/destination TCP/UDP Port fields of the
packet.
Enhanced LAG Hashing
Dell EMC Networking devices based on Broadcom XGS-IV silicon support
configuration of hashing algorithms for each LAG interface. The hashing
algorithm is used to distribute traffic load among the physical ports of the
LAG while preserving the per-flow packet order.
Enhanced hashing mode is not supported on the N1100-
NOTE:
ON/N1500 Series switches.
One limitation with earlier LAG hashing techniques is that the packet
attributes were fixed for all type of packets. Also, there was no MODULO-N
operation involved, which can result in poor load balancing performance.
The LAG hashing support supports an enhanced hashing mode, which has
the following advantages:
•
MODULO-N operation based on the number of ports in the LAG.
•
Packet attributes selection based on the packet type. For L2 packets,
Source and Destination MAC address are used for hash computation. For
IP packets, Source IP, Destination IP address, TCP/UDP ports are used.
•
Non-Unicast traffic and Unicast traffic is hashed using a common hash
algorithm.
•
Excellent load balancing performance.
•
Enhanced LAG hashing is the default hashing mode for LAGs on switches
that support it.
Manual Aggregation of LAGs
Dell EMC Networking switching supports the manual addition and deletion
of links to aggregates.
In the manual configuration of aggregates, the ports send their Actor
Information (LACPDUs) to the partner system in order to find a suitable
Partner to form an aggregation. When the Partner System neglects to respond
using LACPDUs, the Dell EMC Networking switching aggregates manually.
The Dell EMC Networking switching uses the currently configured default
Partner Values for Partner Information.
Layer 2 Switching Commands
621
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