Tuesday, March 20, 2018

Cisco Switch DHCP issue

Hello... I have a Cisco 2960x switch that’s causing me some issues; I’ve assigned an ip, subnet and default gateway and there’s only the default VLAN 1 on the switch. I’ve assigned one trunk port for the SFP and added some STP config to the global config. My issue is that when I plug devices into the switch, some ports pass DHCP while others don’t. And I cant find a reason as there is no special configuration on the ports. As an example, I plug in a VoIP phone and the PoE powers the phone and I can see in iOS showing the link as up but there’s no actual IP assigned. But if I move it one port over (as an example), it’ll work without issue.

Does anything pop out as out of place?



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