Hi,

Studying Cisco LAN Switching,(by Hamilton & Clark), I didn't get how
exactly this method (Root Bridge placement load balancing)works. He
provides such an example (Figure 7-10):               ___________
              |Cat-C (IDF)|
              |___________|
             1/1 /    \ 1/2
                /      \
        VLAN2  /        \ VLAN3
              /          \
             /            \
        1/1 /              \ 1/1
     ______/___            _\________
    |Cat-A(MDF)|__________|Cat-B(MDF)|
    |__________|1/2    1/2|__________|
          |                    |
          |                    |
      Server Farm         Server Farm

Assuming that CAT-A is the Root bridge for VLAN2 and CAT-B is the Root
bridge for VLAN 3, I don't get how this method provides load balancing and
redundancy for CAT-C to the server farms. He doen't say anything about the
third segment (the segment between CAT-A and CAT-B)
Could anyone clearify please ?

Thanks in advance,
Hamid




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