I am trying to see if I understand how vlan's work and have a few vlan quesiton. We have multiple remote sites that connect to our Main office. Each remote site has a router with the following configuration:
int gi0/0.5
desc Voice Vlan
encap dot1q 5
ip address 10.xxx.5.1 255.255.255.0
At each remote site, the switches have been configured with vlan5.
Vlan5 is used to connect the phones at the remote sites to CallManager which is located at our Main office.
The Main Office has a 3750 metro with the following configuration
int vlan5
ip address 10.xxx.5.1 255.255.255.0
My questions are:
1. Is it true that the network 10.xxx.5.0 exist only at the remote site and other remote sites will not see it (network stops at the remote sites router)?
2. Is it true that voice traffic from the remote site is routed from the remote site's router to the District office?
3. Is there any kind of security risk with the above configuration?