Situation: The client was working on Cisco SG300 switch and it works. After they moved the switch, they can’t access the switch any more. Can’t ping or GUI into. However, they can access it using console port and see the port is up.
Troubleshooting: 1. Is the port up yes – “show int sttaus” shows
gi48 full 100 enabled up.
2. Which VLAN used gi48? show vlan shows VLAN 10
vlan 1 untagged port gi1-47
vlan 10 untagged port 48
3. The client only uses VLAN 1 (192.168.16.0/24) now. “show ip int” shows VAL 1 operation is down.
192.168.15.2/24 vlan 10 up/up
192.168.16.2/24 vlan 1 up/down
Resolution: Change port from VLAN 10 to VLAN 1 fixing the problem:
config
int gi48
switchport access vlan 1