Why I mention Cisco IOS Switch not just Cisco Switch, because Cisco has Switch with Catalyst OS old version of Cisco Switch. Cisco has two type of OS Switch device are Catalyst OS (CatOS) and IOS Switch, IOS switch newer than CatOS.
If we new start up or use IOS Switch in network existing there are several condition of switch must be always remember. That are VTP domain and type of VTP.
o VTP domain is the name of switch domain, if we have several switch in a network we need define VTP domain each switch. that is to manage of vlan database every switch, several switch with same VTP domain can sync vlan database.
o type of VTP has three model : server, client and transparent.
- server : create, delete, modify vlan, advertise to other switch with same VTP domain
- client : receive vlan from other switch act as server with same VTP domain
- transparent : create, delete, modify vlan for it self but not advertise to other switch with same VTP domain, if receive vlan update from other switch with sampe VPT domain drop it (VTP version 1), advertise again to other switch with same VTP domain (VTP version 2)
We need concern about vlan database. Vlan database is data about condition of switch about matrix from ports in switch, for example port 1 is same broadcast domain from port 2 or not, all port in switch act as hub same broadcast domain etc.
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