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UniFi USG with CM1000

JamesWino
Aspirant

UniFi USG with CM1000

I have a CM1000 and the WAN is connected to a SRX3205 VPN gateway.  I have no issues and when I connected these, everything worked immediately.  The only problem is the WAN to LAN performance on the 3205 is slow since it is so old.

 

I bought a UniFi USG 3P and I have spent many hours in a series of configurations to get it to work with the CM1000 directly.  I have even connected the USG to the LAN side of the SRX3205 and was able to get out onto the internet.

 

The CM1000 does not have a bridge mode and LPTT.  The CM1000 is setup with a hardware address of 192.168.100.1 on the WAN port.  So I set the WAN port of the USG to 192.168.1.2

and I cannot get out to the internet.  I thought that it might be DNS settings but I cannot even ping a valid IP address on the internet.

 

Here is the Config:  Internet->CM1000->USG 3P->Laptop

DHCP is running only on the USG since the CM1000 does not have DHCP.

LAN is setup as 192.168.1.X with the USG at 192.168.1.1

 

I can ping the 192.168.100.2 from the laptop.  I cannot ping out onto the internet or even to the CM1000 at the 192.168.100.1 address.

Does anyone know what has to be done to get these pair working together?

 

Thanks

JW

 

 

 

 

 

 

 

 

Model: CM1000|DOCSIS® 3.1
Message 1 of 7

Accepted Solutions
vkdelta
NETGEAR Expert

Re: UniFi USG with CM1000

CM1000 is a BRIDGE modem. It has passes on DHCP transactions from ISP directly to device on the LAN side. no config is needed.

 

192.168.100.1 is the DAIGNOSTIC IP for checking GUI and logs.

 

you should set the USGUniFI to DHCP and it should automatically get DHCPv4 and DHCPv6 from ISP directly.

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Message 4 of 7

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JamesWino
Aspirant

Re: UniFi USG with CM1000

Sorry... I meant to type IPPT.... IP Pass Through

Message 2 of 7
antinode
Guru

Re: UniFi USG with CM1000

> [...] VPN [...]
> I bought a UniFi USG 3P [...]

   I know approximately nothing about either topic, but...

> The CM1000 does not have a bridge mode and LPTT. [...]

   I know nothing about LPTT, but I'd say that the CM1000 does not have
a _router_ mode.  It's a cable-TV modem, not a cable-TV modem+router.
I'd say that a _bridge_ mode is about all that it _does_ have.

> [...] The CM1000 is setup with a hardware address of 192.168.100.1 on
> the WAN port. [...]

   I wouldn't say that.  Its web server responds at that address, but
that's a DOCSIS thing which is generally independent of your
communication with your ISP.

> [...] So I set the WAN port of the USG to 192.168.1.2

   Why?  Whence came that address?  Did you mean "192.168.100.2"?  I
would not expect that to improve anything.  My suggestion would be to
forget all about the 192.168.100.0/24 subnet (except when you want to
talk to the CM1000 itself).

   I'd expect the gizmo which is connected to the CM1000 to talk to your
ISP, and (most likely) get its WAN configuration from that ISP.  If you
connect a computer directly to the CM1000, how does it get configured?
My guess would be that it gets your public IP address.  I'd expect that
that's what should happen to anything which you connect to the CM1000
(or any other cable-TV modem).

> [...] and I cannot get out to the internet.

   With that configuration, I'm not amazed.


> Sorry... I meant to type IPPT.... IP Pass Through

   Another region of my ignorance.

   At least one of us may need to read and understand the documentation
on your UniFi Security Gateway.

Message 3 of 7
vkdelta
NETGEAR Expert

Re: UniFi USG with CM1000

CM1000 is a BRIDGE modem. It has passes on DHCP transactions from ISP directly to device on the LAN side. no config is needed.

 

192.168.100.1 is the DAIGNOSTIC IP for checking GUI and logs.

 

you should set the USGUniFI to DHCP and it should automatically get DHCPv4 and DHCPv6 from ISP directly.

Message 4 of 7
JamesWino
Aspirant

Re: UniFi USG with CM1000

Thanks for your inputs here!  This was not as complex as I through it was.  The Unifi tech support told me that I had to setup the static IPs and that was clearly not the case.

Message 5 of 7
JamesWino
Aspirant

Re: UniFi USG with CM1000

Thanks VKDelta!  You nailed it and I had some bad info from the tech folks at UniFi but they do not understand the CM1000.

 

Best,

JW

Message 6 of 7
vkdelta
NETGEAR Expert

Re: UniFi USG with CM1000

Message 7 of 7
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