we are now having two Cisco 2900 switches. One is running in VTP server-mode and one of which is running in transparent-mode. If we set two switches to transparent-mode, is there any impact on our existing VLAN? Is it possible for the switch which is running transparent-mode to receive VLAN information from the switch that is running in server-mode?
When you would have one of your switches in VTP server mode, then you can manage all your VLANs from one switch only (provided the other switches have been configured as clients). That provides you easy management of VLANs. When you configure the switches for transparent mode, then there wouldnt be any sync in VLAN databases of the switches. So if you desire to manage the VLANs on each switch individually, set the switch to transparent mode (the mode in which they would receive the VTP advertisements but would ignore them.)
For more on VTP on Cisco 2900, refer the following link-->
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