Monday, April 4, 2011

Rapid Per-VLAN Spanning-Tree (PVST+) Cisco Switch Configuration

- Instance of RSTP per VLAN
- Improves detection of indirect failures over classic spanning tree (802.1D)
- Even if network doesn't have any layer 2 loops you still should enable spanning tree for protection against unexpected layer 2 loops

Switch(config)#spanning-tree mode rapid-pvst

3 comments:

  1. Hi Aaron, could you explain more about layer 2 loops. thanks.

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  2. Dear All,

    I have 2 DB servers in each Sql 2008R2 we have two lan cords and second one also same.Now i want if primary db fails secondery DB has to take care.
    I have ASA5580 and 4560 switch how can i route vlans for this requirement.

    Srini

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  3. I have the same question as Rex asked.

    Thanks

    Mac
    http://www.engineer-resume.com

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