Cisco WS-C4003 Software Guide - Page 168
Clearing 802.1Q-to-ISL VLAN Mappings
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Configuring VLANs Chapter 10 Configuring VLANs These restrictions apply when mapping 802.1Q VLANs to ISL VLANs: • You can configure up to seven 802.1Q-to-ISL VLAN mappings on the switch. • You must map 802.1Q VLANs to Ethernet-type ISL VLANs. • Do not enter the native VLAN of any 802.1Q trunk in the mapping table. • When you map an 802.1Q VLAN to an ISL VLAN, traffic on the 802.1Q VLAN corresponding to the mapped ISL VLAN is blocked. For example, if you map 802.1Q VLAN 2000 to ISL VLAN 200, traffic on 802.1Q VLAN 200 is blocked. • VLAN mappings are local to each switch. Make sure you configure the same VLAN mappings on all appropriate switches in the network. To map an 802.1Q VLAN to an ISL VLAN, perform this task in privileged mode: Step 1 Step 2 Task Command Map an 802.1Q VLAN to an ISL Ethernet VLAN. set vlan mapping dot1q dot1q_vlan isl isl_vlan The valid range for dot1q_vlan is 1001-4095. The valid range for isl_vlan is 1-1000. Verify the VLAN mapping. show vlan mapping This example shows how to map 802.1Q VLANs 2000, 3000, and 4000 to ISL VLANs 200, 300, and 400 and how to verify the configuration: Console> (enable) set vlan mapping dot1q 2000 isl 200 802.1q vlan 2000 is existent in the mapping table Console> (enable) set vlan mapping dot1q 3000 isl 300 Vlan mapping successful Console> (enable) set vlan mapping dot1q 4000 isl 400 Vlan mapping successful Console> (enable) show vlan mapping 802.1q vlan ISL vlan Effective 2000 200 true 3000 300 true 4000 400 true Console> (enable) Clearing 802.1Q-to-ISL VLAN Mappings To clear an 802.1Q-to-ISL VLAN mapping, perform this task in privileged mode: Step 1 Step 2 Task Clear an 802.1Q-to-ISL VLAN mapping. Verify the VLAN mapping. Command clear vlan mapping dot1q {dot1q_vlan | all} show vlan mapping This example shows how to clear the VLAN mapping for 802.1Q VLAN 2000: Console> (enable) clear vlan mapping dot1q 2000 Vlan 2000 mapping entry deleted Console> (enable) 10-6 Software Configuration Guide-Catalyst 4000 Family, Catalyst 2948G, Catalyst 2980G, Releases 6.3 and 6.4 78-12647-02