10-22-2018 10:02 PM - edited 03-08-2019 04:26 PM
Two offices connected to each other over direct links in close distance.
Office-B1 switch appears to the root for all vlans.
The Office-B1 switch will be cut off from the main office. there will not be any direct link between
both switches. In doing this, will the main office vlans have any issues in terms of spanning tree?
After the link between the main office & Office-B1 is cut off , will the main office switch(without losing connectivity for its clients) realise that it itself will be the root since the link to office-B1 is no longer there.Will there be any outage due to this for main office switch?
(this is closely related to another question i posted in the community, but i forgot to ask this bit
& marked that answered- hence posting another one)
Please help. Thanks
Solved! Go to Solution.
10-22-2018 11:00 PM - edited 10-22-2018 11:01 PM
in that case, you will not have an issue, as there is no spanning tree paths on a single switch.
I would however advise you to start naming your VTP domain and make the one switch the server. and possibly add a password to the vt domain, this way its more scalable for future expansion and will prevent someone plugging a switch in and taking over as VTP server by accident and screw up your vlans (believe me i have seen this happen)
10-22-2018 10:29 PM
Hard to answer, if you cut the link and link and loose L2 connectivity STP will need to re-calculate and elect an new root and underlying switches will recalculate their path and cost to it and decide which path is preferred. You would need to give us a bit more information on the topology. however is you have no redundant paths then you dont have to worry about loops.
what I would try to figure out, is, if you are going to kill the link, can you predict what switch will become root, because if you leve it to chance the wrong one (lowet prio) will be elected, or even based on mac.
10-22-2018 10:48 PM
Both these locations have only one switch each. the switch at Office-B1 will be cut off from the Main office switch.
So, both these switches will act independent.
Both of these (at present) do not have any other switches attached , though Main office switch has a router connected to it.
Will the stp recalculation cause loss of connectivity in this case?
10-22-2018 11:00 PM - edited 10-22-2018 11:01 PM
in that case, you will not have an issue, as there is no spanning tree paths on a single switch.
I would however advise you to start naming your VTP domain and make the one switch the server. and possibly add a password to the vt domain, this way its more scalable for future expansion and will prevent someone plugging a switch in and taking over as VTP server by accident and screw up your vlans (believe me i have seen this happen)
10-23-2018 03:59 AM
Discover and save your favorite ideas. Come back to expert answers, step-by-step guides, recent topics, and more.
New here? Get started with these tips. How to use Community New member guide