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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,
When using ip route <network><mask> interface <interface> how does IOS determine the destination MAC to use when encapsulating the datagram?
Oviously on a serial link there is only one destination. However if a broadcasting protocol like eth...
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...
Here are some sample outputs. I have truncated data for disclosure/sensitive information purposes.Out of 14 Vlans between Switch 1 and 2. Both switches are using Fa1/0/6 as the trunk interface. Switch 2 MAC ends in xxxx.xx16.2408.show mac-address-tab...
In this case, I beleive I am running PVST and the neighboring switch trunk interface MAC is showing in VLAN 2553, but not in 601, 856, or many other VLANs.I received another response not shown here in the thread that mentioned MAC addresses will show...
