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Catalyst 4500 Series, Catalyst 2948G, Catalyst 2948G-GE-TX, and Catalyst 2980G Switches Software Configuration Guide—Release 8.2GLX
78-15908-01
Chapter 11 Configuring VLAN Trunks on Fast Ethernet and Gigabit Ethernet Ports
Example VLAN Trunk Configurations
Figure 11-6 802.1Q Trunking: Final Network Configuration
Step 4 Verify the 802.1Q configuration on Switch 1 by entering the show trunk and show spantree commands.
Switch 1> (enable) show trunk 1/1
Port Mode Encapsulation Status Native vlan
-------- ----------- ------------- ------------ -----------
1/1 nonegotiate dot1q trunking 1
Port Vlans allowed on trunk
-------- ---------------------------------------------------------------------
1/1 1-1005, 1025-4094
Port Vlans allowed and active in management domain
-------- ---------------------------------------------------------------------
1/1 1-3,1003,1005
Port Vlans in spanning tree forwarding state and not pruned
-------- ---------------------------------------------------------------------
1/1 1005
Switch 1> (enable) show spantree 1
VLAN 1
Spanning tree enabled
Spanning tree type ieee
Designated Root 00-60-09-79-c3-00
Designated Root Priority 32768
Designated Root Cost 0
Designated Root Port 1/1
Root Max Age 20 sec Hello Time 2 sec Forward Delay 15 sec
Bridge ID MAC ADDR 00-10-29-b5-30-00
Bridge ID Priority 49152
Bridge Max Age 20 sec Hello Time 2 sec Forward Delay 15 sec
Port Vlan Port-State Cost Priority Fast-Start Group-method
--------- ---- ------------- ----- -------- ---------- ------------
1/1 1 forwarding 4 32 disabled
1/2 1 not-connected 4 32 disabled
<...output truncated...>
Switch 1> (enable)
The output shows that port 1/1 is an 802.1Q trunk port, that its status is “trunking,” and that the port-state
is “forwarding.”
Step 5 Verify the configuration on Switch 2 by entering the show trunk and show spantree commands.
Switch 2> (enable) show trunk 4/1
Port Mode Encapsulation Status Native vlan
-------- ----------- ------------- ------------ -----------
4/1 nonegotiate dot1q trunking 1
Port 1/1
Trunk Type: 802.1Q
Trunk Mode: nonegotiate
Switch 1 802.1Q Trunk Switch 2
99517
Port 4/1
Trunk Type: 802.1Q
Trunk Mode: nonegotiate
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