Cisco WS-C4003 Software Guide - Page 195
Step 2, is resolved see
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Chapter 11 Configuring VLAN Trunks on Fast Ethernet and Gigabit Ethernet Ports Example VLAN Trunk Configurations Step 2 Step 3 Display the problem on Switch 2 by entering the the show spantree and show spantree statistics commands. The configuration mismatch exists until the port on Switch 2 is properly configured. Switch 2> (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 1/0 Root Max Age 20 sec Hello Time 2 sec Forward Delay 15 sec Bridge ID MAC ADDR Bridge ID Priority Bridge Max Age 20 sec 00-60-09-79-c3-00 32768 Hello Time 2 sec Forward Delay 15 sec Port Vlan 1/1 1 1/2 1 4/1 1 4/2 1 Port-State Cost Priority not-connected 4 32 not-connected 4 32 type-pvid-inconsistent 100 not-connected 100 32 Fast-Start Group-method disabled disabled 32 disabled disabled Switch 2> (enable) show spantree statistics 4/1 Port 4/1 VLAN 1 SpanningTree enabled for vlanNo = 1 BPDU-related parameters port spanning tree enabled state broken port_id 0x8142 port number 0x142 path cost 100 message age (port/VLAN) 1(20) designated_root 00-60-09-79-c3-00 designated_cost 0 designated_bridge 00-60-09-79-c3-00 designated_port 0x8142 top_change_ack FALSE config_pending FALSE port_inconsistency port_type & port_vlan Switch 2> (enable) Resolve the misconfiguration by completing the 802.1Q configuration on Switch 2: Switch 2> (enable) set trunk 4/1 nonegotiate dot1q Port(s) 4/1 trunk mode set to nonegotiate. Port(s) 4/1 trunk type set to dot1q. Switch 2> (enable) 2/20/1998,23:41:15:DISL-5:Port 4/1 has become dot1q trunk Port 4/1 on Switch 2 changes from blocking mode to forwarding mode once the port-type inconsistency is resolved (see Figure 11-6). (This assumes that there is no wiring loop present that would cause the port to be blocked normally by spanning tree. In either case, the port state would change from "type-pvid-inconsistent" to "blocking" in the show spantree output.) 78-12647-02 Software Configuration Guide-Catalyst 4000 Family, Catalyst 2948G, Catalyst 2980G, Releases 6.3 and 6.4 11-19