Hi guys, Not really a question, just an observation I stumbled on to while getting some OSPF verification practice in. I have ready access to production routers running multi-area OSPF, so I was running through various verification commands and tryi...

Hello,I work in a WAN environment and have an increasing need to understand the granular details of VLAN stacking. I've read  quite a bit in Cisco and other publications about .1q, the .1qinq extention, and the official IEEE .1ad protocols for frame ...

Hello,I am troubleshooting a multivendor solution over alu, cisco, and juniper where all but the ALU are set to the default MTU (1500+vendor overhead inclusion), the ALU is set to 1540. I have a router inserting into the alu ring trying to reach anot...

Hello,I am curious about MAC learning between trunked switches on a per-vlan basis.In a production environment, I have two switches trunked over a single link. Switch A has 7 VLANs configured with the trunk link to switch B allowed in each. When I lo...