07-16-2022 11:39 PM
Hi, I'm a beginner using cisco switch for VLANs.
I've configured a switch with 4 VLANs for data/AP/CCTV/IP phone
VLAN 2,3,4,5
when I pull out and reinsert network cables, these ports configured for IP phones turn from access GEs to the trunk
how can I prevent this?
thanks
07-17-2022 02:48 AM
- Disable the Auto Smartport feature on the involved ports : https://content.cisco.com/chapter.sjs?uri=/searchable/chapter/content/en/us/td/docs/switches/lan/catalyst9200/software/release/16-12/configuration_guide/int_hw/b_1612_int_and_hw_9200_cg/configuring_auto_smartports.html.xml#:~:text=To%20disable%20Auto....
M.
07-17-2022 05:15 AM
what model of the switch here? is they are the SG series.
If you do not know how to use smart port usage, then as suggested go to the traditional way by disabling the smart port good move.
07-17-2022 09:52 PM - edited 07-17-2022 09:53 PM
Disable the DTP on the port,s if getting an issue and disable the auto-negotiation if required..
for checking DTP below is the command
#show dtp interface gigabitEthernet 0/0
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