Hi there,
Our network engineer had took a major turn in life, and left me to handle the network for the time being. So I need some advice here.
We have 2 X layer 2 sites connected by 2 X 500Mbps EoA connection, running spanning-tree mode, all ports run in trunk mode with all vlans (about 20 of them). By default, all vlans go through a single link (Port A), left another link (Port B) almost no traffic. I want to move some of the vlans from Port A to Port B, by changing "spanning-tree vlan xxx cost xx" to balance the load between 2 links, and I also want to prune some vlans out of the link to further optimze bandwidth.
I used to be an administrator for our office network which means I can affrod plenty of downtime after office hours to work, but now I need to cover the production network which require 0 downtime of all vlans 24.7. So my questions are:
1. If I issue the command on the alt/blk port to change the spanning-tree cost of a single vlan to make it root port, will that affect other vlans on the same port at all, such as temporary drops, pvst relearn... etc?
2. When I issue prune vlan command on a port, will there be any interuption on other vlans?
Thank you very much in advance.
Kenneth Ho
