you can achieve the same using stp port priority.if you have two links with one port channel of 2x10G and a single 10g link.then through STP the portchannel will always become the root port, assuming the root is the 3850 fiber switch.reduce the Spann...

By default the switches would strip the dot1q tag when the traffic from trunk port is spanned to a destination port.If you want to see the tags the for your span session include the "encapsulation replicate" in the monitor session configuration to ca...

The PVST+ bpdu has the vlan id encoded in the Root Identifier and Sender Bridge identifier field.Its encoded in first 12 bytes of the priority field.If that does not matches with the native vlan configured or the access vlan if its access port then t...

check if the rommon variable is bypassing the startup configurationforce the switch into rommon by pressing ctrl+c when it starts booting up once you see the "switch:" prompt check for following switch: set check if you see following variable set to ...