Can someone tell me if having the same VLAN that spans multiple switches and connects to dual distributions really works with GLBP???
I have two interconnected distribution switches (Distribution-A and Distribution-B) that have multiple access layer switches (access-A & access-B) connected to each distribution switch. Each access layer switch has the same VLAN (Vlan2) across both switches. .
STP can be used for L2 load balancing which acn be done using spanning-tree and multiple-vlans, and with etherchannels. If you have 2 uplinks, 1 vlan would be fwd in 1 link, and 2nd vlan would be fwd in the 2nd link.
You are correct. I believe the diagram is in error. Access switch A should have a different vlan than Access switch B, and there should be a L3 connection between the two distribution boxes. GLBP works best when there is only one subnet per switch/closet (no vlan spanning). HSRP makes more sense when spanning vlans across multiple switches and remember to match the STP root with the HSRP active gateway.
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