Sometimes with our cable company you have to call their support line and have them reset the modem and the MAC address in their system. Also I would definitely lock it in at 100mb full duplex and try it.
Chris -----Original Message----- From: Greg Ihnen Sent: Saturday, April 02, 2011 7:11 PM To: WISPA General List Subject: Re: [WISPA] Problems swapping an RB750 and RB-750G I thought of that and tried rebooting the modem and it didn't seem to help. I'll try it again. If the modem was latched to the MAC of the downstream box, would that just effect DHCP or would it effect connectivity in general? So nobody thinks it's possibly a GigE auto-negotiation? I'm going to try forcing the port speed to 100Mbps and use the cross over cable just to see. Thanks! Greg On Apr 2, 2011, at 6:06 PM, Chris Hudson wrote: > Some cable provides latch onto the Mac address of the device being plugged > into it. And you have to reset the cable modem. > > Chris > > Greg Ihnen <[email protected]> wrote: > >> I posted this on the MT forum but I wanted to throw it out here too. >> Thanks. >> >> I've got an RB-750 that I want to replace with an RB-750G and I can't get >> any connectivity between the RB-750G and the Motorola Surfboard cable >> modem. >> >> First I exported in imported the RB-750's config into the RB-750G but the >> RB-750G didn't seem to be getting a DHCP address from the Motorola >> Surfboard cable modem on it's Ether1-Gateway port. I had a link light but >> no connectivity, the RB-750G wouldn't even respond to a ping from the >> internet. Then I tried the RB-750G with the default config (after \system >> reset) and it still wouldn't work. Again I had a link light but no >> connectivity in or out. Next I disabled the RB-750G's DHCP client on the >> Ether1-Gateway port and manually configured it for the public IP address >> that the Surfboard has been giving out via DCHP for years. It's a dynamic >> IP address but it never changes even after widespread system wide outages >> experienced by the cable company. That seems to be our address. Anyway, >> Even with the IP address manually configured I still couldn't get any >> connectivity. >> >> I'm located in South America and the modem/RB-750G in question are in NY. >> I'm managing all this remotely. When I was testing connectivity I was >> trying to ping the router from the internet, connect to the router via >> WinBox from the internet, and by having the local users attempt to access >> the internet. All of those failed. >> >> Now my guess is the RB-750G and modem are not successfully >> auto-negotiating the Ethernet port parameters. So I had the user pick up >> a cross over cable which I'm going to try next with the RB-750G set to >> 100Mbps and full duplex. >> >> Any ideas about what the problem could be would be greatly appreciated. >> >> Greg >> >> >> -------------------------------------------------------------------------------- >> WISPA Wants You! Join today! >> http://signup.wispa.org/ >> -------------------------------------------------------------------------------- >> >> WISPA Wireless List: [email protected] >> >> Subscribe/Unsubscribe: >> http://lists.wispa.org/mailman/listinfo/wireless >> >> Archives: http://lists.wispa.org/pipermail/wireless/ > > > -------------------------------------------------------------------------------- > WISPA Wants You! Join today! > http://signup.wispa.org/ > -------------------------------------------------------------------------------- > > WISPA Wireless List: [email protected] > > Subscribe/Unsubscribe: > http://lists.wispa.org/mailman/listinfo/wireless > > Archives: http://lists.wispa.org/pipermail/wireless/ -------------------------------------------------------------------------------- WISPA Wants You! Join today! http://signup.wispa.org/ -------------------------------------------------------------------------------- WISPA Wireless List: [email protected] Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/ -------------------------------------------------------------------------------- WISPA Wants You! Join today! http://signup.wispa.org/ -------------------------------------------------------------------------------- WISPA Wireless List: [email protected] Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/
