Hunt Group Example - Avaya 580 User Manual

Load Share
Function

Hunt Group Example

Document No. 10-300077, Issue 2
This is different for the 50-series modules. The twelve port layer 3 50-series
media module, all twelve ports are associated with one Forwarding Engine
for layer 3 traffic and one Forwarding Engine for layer 2 traffic. In addition
only one fabric port is used for all twelve ports.
Hunt groups load share by directing different traffic to different ports in the
hunt group, when sending traffic to a particular user. Load sharing is done in
a round-robin fashion across the ports in a hunt group. This is based upon
BOTH the Destination MAC Address and the Source Forwarding
Engine. The hunt group ports on which unicast packets traverse to reach the
destination depends upon the source user's associated Forwarding Engine.
See Figure 6-7. One port in the hunt group will be designated as the base
port or flood port. All flood traffic for all VLANs is sent through this port
only. All ports are members of all VLANs associated with the hunt group
base port. There are 8 non-member Forwarding Engines. Load sharing is
accomplished by using the combination of the Source Forwarding engine
and the Destination MAC Address to assign a hunt group port. Users A and
B are associated with FE#9 and therefore the first port in the hunt group will
be used for unicast packets from A to Destination E and from B to E. Users
C and D are associated with FE#10 and therefore the second port in the hunt
group will be used for unicast packets from C to E and D to E.
When MAC Address E is learned, it is assigned to the first hunt group port
for FE#1, the second hunt group port for FE#2, the first port for FE#3, the
second port for FE#5, the first port for FE#7, the second port for FE#8, the
first for FE#9, and the second port for FE#10. The second destination MAC
Address is round-robin assigned in the same fashion and so on.
Using VLANs, Hunt Groups, and VTP Snooping
6-17