spanning tree root bridge

Unanswered Question
Jan 10th, 2008
User Badges:

can someone explain the ramifications to existing production traffic going through a 4500 switch if the switch is made the root bridge for a specific VLAN? what sort of disruption am I looking at? I assume Spanning tree recalculates, but I've never tested what it does when it happens.

  • 1
  • 2
  • 3
  • 4
  • 5
Overall Rating: 0 (0 ratings)
Edison Ortiz Thu, 01/10/2008 - 10:55
User Badges:
  • Super Bronze, 10000 points or more
  • Hall of Fame,

    Founding Member

Layer2 forwarding will change causing slight disruption if the packets were in transit.

It will be a slight disruption and the length of time depends on how many switches are doing the calculation and where the packets are coming or going. Hard to predict a hard figure, best to do it off-hours.




Jon Marshall Thu, 01/10/2008 - 10:59
User Badges:
  • Super Blue, 32500 points or more
  • Hall of Fame,

    Founding Member

  • Cisco Designated VIP,

    2017 LAN, WAN


In addition to Edison's points if your running PVST+ it should only have an effect on that specific vlan rather than all vlans.

Agree with Edison though, i always do this sort of thing out of hours.



This Discussion