RV180 VLANs not using respective IPs

kjohnson22 · ‎10-15-2014

Hi,

I am new to VLANs but I did spend significant time trying to find an answer here or on the Net.

Situation:

I have the RV180 VPN K9-G5 with Firmware 1.0.4.14 connected to a cable modem via the RV180s-WAN-port. I am trying to create 3 VLANs which don´t see each other´s machines but can all access the Internet. I didn´t change any settings other than setting up these VLANs. (to be complete: To Port 1 a WLAN-Router is connected which is configured to be a WLAN-Accesspoint only (no dhcp, ip-sharing, nat, firewall), so this machine shouldn´t interfere).

Accessing the Internet from VLAN30 works fine.

Problems:

connected to Port-2=VLAN30 on my admin-PC....

a) ...I can see all Hosts on all VLANs (using a portscanner). Why not only the Ips of VLAN 30?

b) ... all machines in all VLANs have IPs 192.168.1.* (see admin-PC attached). Why not 192.168.1.4.* for my admin-PC?

VLAN ID	Description	Inter VLAN Routing	Device Management	Port 1	Port 2	Port 3	Port 4
1	Default	Disabled	Enabled	Untagged	Untagged	Tagged	Tagged
10	Norbert	Disabled	Disabled	Excluded	Excluded	Untagged	Excluded
20	Jürgen	Disabled	Disabled	Excluded	Excluded	Excluded	Untagged
30	Kevin	Enabled	Enabled	Tagged	Tagged	Excluded	Excluded

IPv4 Address                192.168.1.1 / 255.255.255.0
IPv6 Address
DHCP Server                Enabled
DHCP Relay                 Disabled
DHCPv6 Server IPv6   is disabled

VLAN ID	Description	Inter VLAN Routing	Device Management	Port 1	Port 2	Port 3	Port 4
1	Default	Disabled	Enabled	Untagged	Untagged	Tagged	Untagged
10	Norbert	Disabled	Enabled	Excluded	Excluded	Untagged	Excluded
20	Jürgen	Disabled	Disabled	Excluded	Excluded	Excluded	Tagged
30	Kevin	Enabled	Enabled	Tagged	Tagged	Excluded	Excluded

next test:

To find out where my 192.168.1.*-IPs are coming from I then numbered all "Domains" in all Subnets as "Cisco1" for VLAN1 and "Cisco10" for VLAN10 etc.. After ipconfig/renew I could see that my IPs are coming from VLAN-ID 1 by checking the DNS-Suffix.

But even when I deactivated the IPV4-LAN-DHCP-Server I receive IPs from 192.168.1.*-IPs. Why?

Thanks so much. Probably I am lacking some basic understanding.

Kevin

kjohnson22 · ‎10-18-2014

I solved the Problem. It was due to the DHCP-Lease time. After lowering it to an hours or releasing the ip-address the new IP addresses came through.