Cisco WS-C4003 Software Guide - Page 167
Mapping 802.1Q VLANs to ISL VLANs
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Chapter 10 Configuring VLANs Configuring VLANs This example shows how to assign switch ports to a VLAN and verify the assignment: Console> (enable) set vlan 500 2/4 VLAN 500 modified. VLAN 560 modified. VLAN Mod/Ports 500 2/4 Console> (enable) show vlan 500 VLAN Name Status IfIndex Mod/Ports, Vlans 500 Engineering active 59 2/4 VLAN Type SAID MTU Parent RingNo BrdgNo Stp BrdgMode Trans1 Trans2 500 enet 100500 1500 - - - - - 0 0 VLAN AREHops STEHops Backup CRF Console> (enable) show port 2/4 Port Name Status Vlan Level Duplex Speed Type 2/4 notconnect 500 normal auto auto 10/100BaseTX Port Security Secure-Src-Addr Last-Src-Addr Shutdown Trap IfIndex 2/4 disabled No disabled 12 Port Status Channel Channel Neighbor Neighbor mode status device port 2/4 notconnect auto not channel Port Align-Err FCS-Err Xmit-Err Rcv-Err UnderSize 2/4 - 0 0 0 0 Port Single-Col Multi-Coll Late-Coll Excess-Col Carri-Sen Runts Giants 2/4 0 0 0 0 0 0 0 Last-Time-Cleared Wed Jul 26 2000, 19:44:05 Console> (enable) Mapping 802.1Q VLANs to ISL VLANs The valid range of user-configurable ISL VLANs is 1-1000. The valid range of VLANs specified in the IEEE 802.1Q standard is 0-4095. In a network environment with non-Cisco devices connected to Cisco switches through 802.1Q trunks, you must map 802.1Q VLAN numbers greater than 1000 to ISL VLAN numbers. 802.1Q VLANs in the range 1-1000 are automatically mapped to the corresponding ISL VLAN. 802.1Q VLAN numbers greater than 1000 must be mapped to an ISL VLAN in order to be recognized and forwarded by Cisco switches. 78-12647-02 Software Configuration Guide-Catalyst 4000 Family, Catalyst 2948G, Catalyst 2980G, Releases 6.3 and 6.4 10-5
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