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New Member

LAN question

We have a standard campus LAN, servers are connected to L2 access switches, and each access switch is dual hommed to two Layer 3 distribution switches. The two distribution switches are connected together via trunked etherchannel, the trunk is carrying all the users VLAN. Of course we are running HJSRP on the MSFC’s and we are using first distribution switch as the root (STP) for the odd VLANs, and the second as the root for the even VLANs. MSFC1 is the HSRP active router for the odd VLANs, MSFC2 is the active for the even VLANs.

Now there is a suggestion to replace HSRP by Glbp, and remove the etherchannel and trunking between the two distribution switches and create two new VLANS on the links between the distribution switches and run OSPF between them..

Any comments on these suggestions?

1 REPLY
New Member

Re: LAN question

It sounds like the suggestion is to route between your distribution switches instead of bridge. Routing b/w the switches would eliminate your STP loop. The problem with STP is slow convergance and it doesn't scale. Routing b/w the switches would allow for faster reconvergance from a routing protocol and not waiting for STP to transition to a forwarding state. The suggestion for removal of the etherchannel doesn't seem to be worthwhile as you can still route across and maintain redundancy with an etherchannel as opposed to having multiple paths without the etherchannel.

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