svi v. vlan...

keith barker says that a switched virtual interface is a logical interface created from an existing vlan... this is an excellent explanation of this vague difference... here you can download that video in zip format, and i suggest you do....

https://learningnetwork.cisco.com/docs/DOC-7501

the only requirement to creat a vlan is a number, period... to further create the svi, you must type int vlan 99, after creating the vlan... there are no other requirements to creating the svi...


dsw2(config)#vlan 99
dsw2(config-vlan)#end
dsw2#sh vlan brie

VLAN Name                             Status    Ports
---- -------------------------------- --------- -------------------------------
1    default                          active    Fa0/6, Fa0/7, Fa0/8, Fa0/9
                                                Fa0/10, Fa0/11, Fa0/12, Fa0/13
                                                Fa0/14, Fa0/15, Fa0/16, Fa0/17
                                             
10   data                             active
20   voice                            active
99   VLAN0099                         active
100  mgmt                             active
1002 fddi-default                     act/unsup
1003 trcrf-default                    act/unsup
1004 fddinet-default                  act/unsup
1005 trbrf-default                    act/unsup

dsw2(config)#int vlan 99
dsw2(config-if)#do sh int vlan 99
Vlan99 is up, line protocol is down
  Hardware is EtherSVI, address is 000b.5fc9.0000 (bia 000b.5fc9.0000)
  MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec,