20040331 Topics 1. Trunk=backbone of two switches 2. trunk connects VLANs on different switches 3. ISL - Cisco trunk protocol - Add new encapsulation dot1q - IEEE 802.1Q - modify existing frame 4. Note the four modes of trunk status (on off auto desire) table in 9.1.5 figure 4 5. VTP modes: server, client, transparent 6. read 9.2.3 thoroughly 7. inter VLAN 9.3.3, inter VLAN routing 9.3.5, 9.3.6 8. 9.3.6 figure 3 9. e-lab in 9.1.3, 9.1.5, 9.2.5, 9.3.2, 9.3.3, 9.3.6