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Broadcast mac address from RV042?

Discussion in 'Cisco Small Business Routers and VPN Solutions' started by Jason Howe, Jul 3, 2012.

  1. Jason Howe

    Jason Howe Serious Server Member

    Hi all,

    We've recently installed a new VOIP phone system in our office (Shoretel). Almost everything is working fine, except the following - we can't get the phones or the Shoretel switch to communicate with our LAN router (RV042).

    Here's the scenario:

    LAN:
    RV042 - DF = 192.168.101.253
    It has multiple subnets enabled - the second subnet being 192.168.104.x
    Communication between any device (except the phones and voip switch) on the 192.168.101.x subnet and 192.168.104.x subnet is working fine. There is internet access to a server we have on that subnet, and I can also add my own laptop to that subnet without any issues.

    The issue:
    The voip phones and switch have 192.168.104.x addresses. They have 192.168.101.253 set as their default gateway (which is what I want as the RV042 is the only router, hence the multiple subnet setting). They can not ping the DF or anything on the 192.168.101.x subnet, but they can ping anything on the 192.168.104.x subnet.

    So, I'm confused. Any other device on the 104.x subnet will ping inside and outside just fine, it's just the phones and the voip switch that won't. I've spoken with our Shoretel support, and they're saying that the mac address of the RV042 isn't being broadcast back to the phones and the switch.

    Does anyone know of a setting on the RV042 that will allow this? I've searched high and low, and nothing so far. I've also enabled Telnet and gone in through the command line of the RV042 to try and add the mac address of one of the phones to it; still no dice.

    Thanks, let me know if you need more clarity.

    J.
     
  2. Toxic

    Toxic Administrator Staff Member

    Can you connect from the RV042 LAN to a device on the other subnet via IP (not a ping but an actual connection) RDP, Telnet etc? what is your routing table on the RV042? what is the firewall access rules on your RV042? do they allow any access from Subnet A to Subnet B?
     
  3. Toxic

    Toxic Administrator Staff Member

    BTW do the two subnet have the same netmask? ie 255.255.255.0 ?
     
  4. Sfor

    Sfor Network Guru Member

    The RV042 can not communicate directly with multiple subnets. In order for this feature to work correctly an additional router has to be used and a proper routing rule set in the RV042.

    In other words, the multiple subnet feature was ment to connect a different subnet (connected to RV042 through no-NAT router) to the internet. All it does is appending the NAT gateway adress space by additional LAN address spaces. RV042 can still communicate directly just with IP's in its base LAN. So, a bridge router is necesary to connect RV042 base LAN with additional LAN defined in multiple subnet feature.
     

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