Load Balancing; B-Vlan To Ect Algorithm Mapping - HP 5920 series Configuration Manual

Figure 7 Multiple SPB VSIs
Customer site A
BEB
I-SID 400
I-SID 500
Customer site E

Load balancing

To balance traffic between forwarding paths, you can map B-VLANs to different ECT algorithms. When
a path is approaching congestion, you can move part of traffic on one path to another by moving an
I-SID from one ECT algorithm to another.

B-VLAN to ECT algorithm mapping

For balanced traffic distribution, SPBM supports calculating one SPT for a set of B-VLANs by using
different ECT algorithms. IEEE 802.1aq SPB provides 16 ECT algorithms. Each algorithm represents a set
of tie-break rules. As a result, you can have up to 16 forwarding paths in an SPBM network.
Figure 8 shows two SPTs that are calculated by using two ECT algorithms.
Customer site B
VSI 2
VSI 3
SPBM
network
BEB
I-SID 400
BEB
I-SID 300
I-SID 400
BEB
I-SID 300
VSI 1
I-SID 400
BEB
I-SID 300
I-SID 400
I-SID 500
Customer site D
10
Customer site C