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Hunt Group Example

See Figure 6-7. One port in the Hunt Group will be designated as the “Base”/“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.

Figure 6-7. Slot to Fabric Port Relationship

Table 6-3. Module Forwarding Engines and Fabric Ports
Module Type
Total Number of forwarding engines
Number of Fabric Ports
Description
80-series M8000R Supervisor
2
1
FORE port, CPU
80-series 24 port 10/100Mbps TX and 100Mbps FX
2
2
1 forwarding engine per fabric port
80-series 48 port 10/100Mbps
4
2
2 forwarding engines per fabric port
80-series 4 port Gigabit Fiber or TX
4
2
2 forwarding engines per fabric port
80-series 8 port Gigabit Fiber or TX
8
2
4 forwarding engines per fabric port
50-series 10 port 100Mbps FX(layer 2)
1
1
1 forwarding engine to 1 fabric port only
50-series 10 port 100Mbps FX (layer 3)
2
1
2 forwarding engines to 1 fabric port only
50-series 12 port 10/100 TX (layer 3)
2
1
2 forwarding engines to 1 fabric port
50-series 2 port Gigabit Fiber (layer 2)
2
2
1 forwarding engine to 1 fabric port
50-series 2 port Gigabit Fiber (layer 3)
4
2
1 forwarding engine to 1 fabric port
50-series 4 port Gigabit Fiber (layer 2)
4
2
2 forwarding engines per fabric port
50-series 20 port 10/100Mbps TX (layer 2)
2
2
1 forwarding engine per fabric port

NOTE: All 80-series media modules are L3 capable.

Figure 6-8. Load Sharing Example


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