Lab 2. Switching - ISL Trunk Ports

Objective: Configure an ISL trunk between SW1 and SW2

SW1:

SW1(config)#int e0/0

SW1(config-if)#switchport mode dynamic desirable

SW1(config-if)#no shu

SW2: 

SW2(config)#int e0/0

SW2(config-if)#switchport mode dynamic desirable

SW2(config-if)#no shu

Verify the switchport and trunk

SW1(config-if)#do sh int statu | in Port|Et0/0

Port         Name               Status       Vlan       Duplex  Speed Type

Et0/0                           connected    trunk        auto      auto    10BaseTX

SW2(config-if)#do sh int status | i (Port|Et0/0)

Port         Name               Status       Vlan       Duplex  Speed Type

Et0/0                           connected    trunk        auto      auto    10BaseTX

SW2(config-if)#do sh int e0/0 switch

Name: Et0/0

Switchport: Enabled

Administrative Mode: dynamic desirable

Operational Mode: trunk

Administrative Trunking Encapsulation: negotiate

Operational Trunking Encapsulation: isl

Operational Dot1q Ethertype:  0x8100

Negotiation of Trunking: On

Access Mode VLAN: 1 (default)

Trunking Native Mode VLAN: 1 (default)

Administrative Native VLAN tagging: enabled

Operational Native VLAN tagging: disabled

SW2(config-if)#do sh int trunk

Port                Mode          Encapsulation  Status        Native vlan

Et0/0               desirable     n-isl                 trunking      1

Port                Vlans allowed on trunk

Et0/0               1-4094

Port                Vlans allowed and active in management domain

Et0/0               1

Port                Vlans in spanning tree forwarding state and not pruned

Et0/0               1