Recently, the network administrator at the client site got time to connect to the switches to learn more about the config. In doing so he discovered that the access layer switches (2960S) were not accessible from any device not on the same management VLAN as their management IPs. The core switch which is on the same VLAN is accessible from any other VLAN. Right now the only way to contact the access switches is to ssh from the core or to place a workstation on the management VLAN.
So far I have ruled out/checked out the following:
- Duplicate IPs
- Network Loops
- The management VLAN is trunked properly across the 10Gbps uplinks to the access switches.
- The management VLAN is in the core's routing table.
- The access switches are listed in both the mac address table and the ARP table of the core switch.
- The SVI for the management VLAN is UP/UP
I'm looking for ideas of where else to check for the cause of this behavior. Thanks in advance for any help and I promise to post the solution when it comes.