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PowerPower49F Link 50F49F Link 50FConsole1 3 5 7 9 1113 15 17 19 21 2325 27 29 31 33 3537 39 41 43 45 471F 2F 3F 4F2 4 6 8 10 1214 16 18 20 22 2426 28 30 32 34 3638 40 42 44 46 48Console1 3 5 7 9 1113 15 17 19 21 2325 27 29 31 33 3537 39 41 43 45 471F 2F 3F 4F2 4 6 8 10 1214 16 18 20 22 2426 28 30 32 34 3638 40 42 44 46 48Chapter 8: Virtual Local Area Network (VLAN)VLAN 20VLAN 10e125th Floor SwitchCFOtaggedVLAN 20taggedVLAN 10VLAN 20VLAN 104th Floor SwitchMarketingAccountingThe Default VLANBelieve it or not, even if you've never configured a VLAN on your switch, there isa VLAN on your switch. It's the default VLAN, and every single port is anuntagged member of it. On new switches, this is VLAN 1. VLAN 1 is often usedfor special purposes with other switch manufacturers, so it's considered goodpractice to change this number. In fact, it is commonly changed to the very lastVLAN number: 4095. You can make this change in the switch's Global config:Switch#conf tSwitch(config)#default-vlan-id 4095Even though every switch port starts out as an untagged member of this VLAN,you don't have to do anything special to make a port a member of a new VLAN.Let's say a port is an untagged member of, oh, VLAN 10, and you wanted it tobe an untagged member of VLAN 20. You must first remove the untagged portfrom VLAN 10. Then, you can add it as an untagged port in VLAN 20. With thedefault VLAN, you don't need to do this. That's one of the things that makesthe default VLAN special. If you have a port that's a member of the defaultVLAN, and you want to make it an untagged member of VLAN 20, you can justuntag it as a member. No preliminary steps required.The other thing that makes this VLAN special is that all ports that have beenremoved from a VLAN are automatically untagged members of the defaultVLAN. If you have a port that's an untagged member of VLAN 10, and youremove it from VLAN 10:Switch(config-vlan-10)#no untagged e 27Switch(config-vlan-10)#180 Brocade IP Primer