Setup trunk between switches
| conf t |
| enter into configuration mode of switch #1 |
| int fa0/24 |
| select interface for using trunking |
| switchport mode trunk |
| set the selected port for trunking |
| switchport trunk native vlan 100 |
| set VLAN 100 as native VLAN during trunking, so untagged traffic will go trough this VLAN |
| end |
| finish configuration on switch #1 |
| sh vlan |
| check VLAN-s are properly configured for the interfaces, access ports are in the same VLAN on both sides |
| repeat the same procedure on switch #2 |
| sh interfaces trunk |
| check the trunk status |
| switch trunk allowed vlan 4 |
| restrict trunk connection only for transferring VLAN 4 |
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