DELL 8132 ユーザーズマニュアル

Port Channel Commands

• Source/Destination IP and source/destination TCP/UDP Port fields of the 

packet.

PowerConnect 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.
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.
As part of Release 4.0, the LAG hashing support is extended to support 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.

PowerConnect 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 PowerConnect switching aggregates manually. The 

PowerConnect switching uses the currently configured default Partner Values 

for Partner Information. 

2CSPC4.X8100-SWUM102.book  Page 614  Friday, March 15, 2013  8:56 AM