Cisco WS-C4003 Software Guide - Page 190
Step 6, When the trunk links come up
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Example VLAN Trunk Configurations Chapter 11 Configuring VLAN Trunks on Fast Ethernet and Gigabit Ethernet Ports Step 6 Step 7 Step 8 Port Vlans in spanning tree forwarding state and not pruned 1/1 1-2,10,20,30,40,50,60,99-105 1/2Switch_1> (enable) 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 . . . Switch_2> (enable) 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 1/1 1 forwarding 19 1/1 10 forwarding 19 1/1 20 forwarding 19 1/1 30 forwarding 19 1/1 40 forwarding 19 1/1 50 forwarding 19 1/1 60 forwarding 19 1/1 1003 not-connected 19 1/1 1005 not-connected 19 Switch_1> (enable) show spantree 1/2 Port Vlan Port-State Cost 1/2 1 blocking 19 1/2 10 blocking 19 1/2 20 blocking 19 1/2 30 blocking 19 1/2 40 blocking 19 1/2 50 blocking 19 1/2 60 blocking 19 1/2 1003 not-connected 19 1/2 1005 not-connected 19 Switch_1> (enable) Priority -------- 32 32 32 32 32 32 32 32 4 Priority -------- 32 32 32 32 32 32 32 32 4 Fast-Start ---------- disabled disabled disabled disabled disabled disabled disabled disabled disabled Fast-Start ---------- disabled disabled disabled disabled disabled disabled disabled disabled disabled Group-method Group-method Divide the configured VLANs into two groups. You might want traffic from half of the VLANs to go over one trunk link and half over the other, or if one VLAN has heavier traffic, you can have traffic from that VLAN go over one trunk and traffic from the other VLANs go over the other trunk link. 11-14 Software Configuration Guide-Catalyst 4000 Family, Catalyst 2948G, Catalyst 2980G, Releases 6.3 and 6.4 78-12647-02