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Catalyst 6000 Family Software Configuration Guide—Releases 6.3 and 6.4
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Chapter 5 Configuring Ethernet VLAN Trunks
Example VLAN Trunk Configurations
Port Vlans in spanning tree forwarding state and not pruned
-------- ---------------------------------------------------------------------
1/1
1/2
Switch_1> (enable)
Step 6
Note that when the trunk links come up, VTP passes the VTP and VLAN configuration to Switch 2.
Verify that Switch 2 has learned the VLAN configuration by entering the
show vlan
command on
Switch 2.
Switch_2> (enable)
show vlan
VLAN Name Status Mod/Ports, Vlans
---- -------------------------------- --------- ----------------------------
1 default active
10 VLAN0010 active
20 VLAN0020 active
30 VLAN0030 active
40 VLAN0040 active
50 VLAN0050 active
60 VLAN0060 active
1002 fddi-default active
1003 token-ring-default active
1004 fddinet-default active
1005 trnet-default active
<...output truncated...>
Switch_2> (enable)
Step 7
Note that spanning tree takes one to two minutes to converge. After the network stabilizes, check the
spanning tree state of each trunk port on Switch 1 by entering the
show spantree
command.
Trunk 1 is forwarding for all VLANs. Trunk 2 is blocking for all VLANs. On Switch 2, both trunks are
forwarding for all VLANs, but no traffic passes over Trunk 2 because port 1/2 on Switch 1 is blocking.
Switch_1> (enable)
show spantree 1/1
Port Vlan Port-State Cost Priority Fast-Start Group-method
--------- ---- ------------- ----- -------- ---------- ------------
1/1 1 forwarding 19 32 disabled
1/1 10 forwarding 19 32 disabled
1/1 20 forwarding 19 32 disabled
1/1 30 forwarding 19 32 disabled
1/1 40 forwarding 19 32 disabled
1/1 50 forwarding 19 32 disabled
1/1 60 forwarding 19 32 disabled
1/1 1003 not-connected 19 32 disabled
1/1 1005 not-connected 19 4 disabled
Switch_1> (enable)
show spantree 1/2
Port Vlan Port-State Cost Priority Fast-Start Group-method
--------- ---- ------------- ----- -------- ---------- ------------
1/2 1 blocking 19 32 disabled
1/2 10 blocking 19 32 disabled
1/2 20 blocking 19 32 disabled
1/2 30 blocking 19 32 disabled
1/2 40 blocking 19 32 disabled
1/2 50 blocking 19 32 disabled
1/2 60 blocking 19 32 disabled
1/2 1003 not-connected 19 32 disabled
1/2 1005 not-connected 19 4 disabled
Switch_1> (enable)
