As you can see from sh spanning-tree vlan 10 output this vlan 10 is in blocking mode(alternate port) so it does exist on the switch.
All vlans showed in upper output do exist on the switch and are active but they don't appear in lower output because they may be pruned(vtp pruning) or not in fwding state(stp) and here for vlan 10 this was the case and I think it must be the same for others.
my both switches are in RSTP MODE. but here SG-300 using RSTP and 2960 using rapid-pvst. its taking the spanning tree root on Gi0/1 for some vlans in 2960. Gi0/2 is up link to SG-300 , all vlans on the trunk.. but spanning-tree not forwarding those vlans on G0/2. can i root those vlan to gi0/2?
Port Vlans in spanning tree forwarding state and not pruned
This document gives several answers on frequently asked questions for PFRv3 channel state behavior.
Q1: What are all the channel operational states from a BR (border role) perspective and what are the rules/conditions to be in each st...
The need was to reach an host inside a LAN through a VPN connection managed by the LAN gateway (Cisco 1921).
The LAN gateway performs NAT and there was a dedicate nat rule for the host i wanted to reach through VPN.
I couldn't connect to the hos...
We have 3 identical switches configured by someone else and would like to claim some of the Gigabit ports(G1/G2/G3/G4) for use on servers. When we try to change the wiring and configuration, we run in to connectivity issues. Attached is a des...