802.1Q
Trunk
VTP Client VTP Client VTP Client VTP Client
802.1Q
Trunk
802.1Q
Trunk
VTP Server
VTP Domain ICND
1. VLAN Added/Deleted
2. Change Propagated
3. Synch to Latest Change
802.1Q
Trunk
28 Chapter 2: Medium-Sized Switched Network Construction
?– Transparent: When you change the VLAN con?¬?guration in VTP transparent mode,
the change affects only the local switch and does not propagate to other switches in the
VTP domain. VTP transparent mode does forward VTP advertisements that it receives
within the domain. A VTP transparent device does not synchronize its database with
any other device.
?– Client:You cannot change the VLAN con?¬?guration when in VTP client mode;
however, a VTP client can send any VLANs currently listed in its database to other
VTP switches. VTP advertisements are forwarded in VTP client mode. A VTP client
synchronizes its database with other VTP servers and clients.
VTP clients that run Cisco Catalyst operating systems do not save the VLANs to NVRAM.
When the switch is reloaded, the VLANs are not retained, and the revision number is zero.
However, Cisco IOS VTP clients save VLANs to the vlan.dat ?¬?le in ?¬‚ash memory, retaining
the VLAN table and revision number.
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