We have a vlan interface configured with multiple secondary ip addresses on one of our core L3 switches. Now we do not know who or why those secondary ip addresses were configured. How can we find out if the secondary ip address of a vlan interface a...

We have a catalyst stack of 3850 switches that is used as our core L3 switch in our hub site in a datacenter. We have a dual homed ISP connection (HSRP on the inside active/passive). It's pretty simple, about 2 to 3 internal L2 switches, 1 L3 core sw...

I need to find out if OSPF can be configured on the outdated (probably eol) L3 switches WS-C3750G-24TS-1U and WS-C4506-E. Can't find an official document from Cisco to confirm that OSPF  (version 1 or version 2?) is supported. The neighboring OSPF de...

What would be the best way to segment clients from servers across several departments (Lan and WAN) globally? Would vrf's be any helpful? What hardware would be recommended? I would assume traditional firewalls are too slow?