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Multiple subnets behind RV016?

Discussion in 'Cisco Small Business Routers and VPN Solutions' started by davisja1, Aug 22, 2006.

  1. davisja1

    davisja1 LI Guru Member

    I have a RV016 installed as the Internet gateway at a site (internal address 192.168.2.254). That site also has another router (192.168.2.1, default gateway is set to the Linksys router, 192.168.2.254)) that supports T1 connections to other facilities (192.168.3.1 and 192.168.4.1, default gateway is 192.168.2.1 for both remote routers). RIP transmit and listen is enabled on all routers, I also have a static route defined for 192.168.3.x network and 192.168.4.x network in the Linksys RV016 (points to router 192.168.2.1). Traffic between the 3 local subnets flows with no problem. Traffic from the subnet local to the RV016 (192.268.2.x) can reach the Internet with no problem. However, network traffic from the remote subnets (192.168.3.x and 192.168.4.x) isn't getting to the Internet. Does anyone have this working or know if the RV series of routers is capable of supporing multiple subnets in this configuration.

    Thanks.
    Jeff Davis
     
  2. TazUk

    TazUk Network Guru Member

    What does a trace route to something on the internet from a PC on one of those subnets tells you?
     
  3. Xphyr

    Xphyr Network Guru Member

    This is a problem that I have found as well. I have a similar (but different) setup wich has a 192.168.1.X subnet (the RV082) and a 192.168.2.X (and 192.168.3.X) routed by a WRT54G (using DDWRT). The problem is for some reason the RV082 (and its siblings) will not do NAT translation for any IP subnet other than the one it is configured on. (In my case 192.168.1.X) It drops all other packets to be NATed. I found this a few months back and Linksys does not believe this to be an issue (or at least they didnt) I have not tried to log a new problem on this.
     
  4. davisja1

    davisja1 LI Guru Member

    TazUk - A traceroute shows the PC able to reach the RV016 but no farther.

    Xphyr - It's good to get a confirmation that others are having this issue also. I thought maybe I was just missing something obvious.

    Thanks.
     
  5. TazUk

    TazUk Network Guru Member

    Sounds like the issue Xphyr has mentioned :frown1:
     
  6. Xphyr

    Xphyr Network Guru Member

    I am thinking that if we can find enough people on this forum for whom this is an issue maybe we can try raising it again... maybe with enough people complaining about it, we can get this fixed
     
  7. davisja1

    davisja1 LI Guru Member

    Sounds good to me. If it isn't fixed, I'm going to have no option other than replacing the unit with one from a different vendor that supports this configuration properly.
     
  8. pablito

    pablito Network Guru Member

    I too would vote for configurable NAT. A true firewall would have this and wouldn't even default to NATing the internal network. This may be their thinking, default to the most common and prevent anything else. The most common question I answer on another forum is about NAT, the user didn't setup NAT for the internal network.

    This requires a new option in the GUI, network->Interface, for NAT (Masquerade). The networking bits are already there, we just need access to configuration.

    Pretty simple but you will get a lot of people asking why they can't see the internet... But the RV is intended for sites that commonly would have multiple internal routes needing access (or not).
     
  9. sterner

    sterner LI Guru Member

    I too have a similar problem with my RV016.

    I have the RV016 at our main office as the gateway for internet. We have a T1 router at same site that is connected to 4 other sites, all sites having separate ip segments than the main office. A 3rd router (BEFSX41) is setup at the main office to act as the gateway for the T1 router. Works perfect. As soon as I change the gateway for the T1 router from the BEFSX41 to the RV016, users at the other end of the T1 get the login prompt for the RV016. I switch it back to the BEFSX41 and all is fine again. There is DSL + Cable on the RV016, and DSL on the BEFSX41. I would like to have the RV016 handle all 3 WAN's, but since it won't act as a gateway for another router, I'm screwed. Anyone else?
     
  10. pablito

    pablito Network Guru Member

    An ugly workaround in the meantime is another basic NAT router (linux perhaps), NAT the subnets to the local net and then out the RV. Double NAT isn't desirable but it will work.
     
  11. Xphyr

    Xphyr Network Guru Member

    Pablito, yeah I did think about the "double nat" concept but it is a pretty ugly work around especially for a router that should handle something like this. BTW if you use any of their other routers, not in the RV family but say the WRT or BEFV series, they handle this sort of thing just fine. I need the failover functionality however so that is why I struggle through with the RV082.
     
  12. vreid4736201

    vreid4736201 LI Guru Member

    Same Problem Here

    I have the same problem with a network with combinationr RV016's and RV082's. As soon as I try to route a second subnet through either device. Internet access goes away.

    I've found that the RV's won't do NAT on IP's not in its local subnet. This makes these devices much less useful as good network routing/firewalling tools and makes them pretty pointless for use in multiple subnet environments.

    I've raised this issue with Linksys multiple times, and, so far, they have just said that their RV products are not designed for multiple subnet environments.
     
  13. Toxic

    Toxic Administrator Staff Member

    hehehe thats what tech support think. watch this space.
     
  14. dtweed

    dtweed Network Guru Member

    RV082, et al workaround

    I'm not sure if you guys caught the workaround I was using (before the 1.3.3.4) on my RV082 was to disable the WAN2 port. I realize this is not an option for those of you actually needing the failover / etc. But it did work. Until 1.3.3.4 - that seems to have broken it completely. I can no longer router my second subnet either.

    Hopefully this shows that the router CAN DO ITS JOB PROPERLY. It's just not doing it in all the configurations it's supposed to. Linksys - please, please fix it.

    Please.
     
  15. pablito

    pablito Network Guru Member

    I believe there is hope on this issue. The market for the RV certainly could have subnets and isn't as rare as they first thought. "They're working on it" I have little doubt.

    There are some older firmware/cheaper routers that appear to handle multi NAT but they do it blindly. That isn't secure for several reasons so the idea is to selectively NAT by a config option. I'm glad that it doesn't blindly NAT but will be happy when I can select what does.
     

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