SpotALoony's profile

Frequent Visitor

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9 Messages

Tue, Jan 28, 2020 3:00 AM

Cannot get to Arris SB8200 192.168.100.1 through Linksys wireless router (Sort of Solved)

I installed an SB8200 last night and went through a major dance to get to 192.168.100.1.

 

My original intention was to use one of the two SB8200 Ethernet connections for  a Linksys wireless router and the other to direct connect a PC. This plan fell through when I learned that XFinity only provides one IP address to residential accounts. So only the Linksys wireless router is plugged into the SB8200 and the PC is connected to an Ethernet port on the Linksys wirelss router.

 

In this configuration 192.168.100.1 cannot be accessed from the PC. Attempts to browse to it would timeout. I could ping it but that was about it. 

 

The brilliant sollution I found somewhere out on the web was to temporarilly plug the PC directly into the second Ethernet port of the SB8200 and modify the PC's connection settings so that the Ethernet connection uses a fixed IP address such as 192.168.100.20. Once this was done the PC could get to 192.168.100.1.

 

Havnig to change the connection settings and move a cable is slightly inconvenient but at least I can get to the error logs in a pinch.

 

Hope this helps someone going through the same type of thing.

 

 

 

 

 

Responses

cxrider

Regular Contributor

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89 Messages

1 y ago

Hmm... which Linksys router are you using and what firmware is it running?   It should not be that difficult to reach your modem.   

 

I have my 8200 plugged into a managed switch (Extreme X460-48t), a logging system, and my Linksys WRT1900ACS WAN port all on the same VLAN.   The rest of my wired devices are plugged into the X460 on a different VLAN.     Neither VLAN is routed by the X460 switch.  I use a different network for my devices, let's say it is 192.168.192.0/24.  All of my systems are able to reach my modem on 192.168.1.100.    My guess would be that your router is not routing properly or at least not routing between your private network and 192.168.100.0/24.  

Frequent Visitor

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9 Messages

1 y ago

It's an EA7500 with the latest firmware.

 

There are lots of posts about not getting to an SB8200's 192.168.100.1 via Linksys Routers but I have yet to find one that actually had a workable solution other than the one I reported.

cxrider

Regular Contributor

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89 Messages

1 y ago

Whose firmware?    Linksys?  dd-wrt?   OpenWRT?    Something else?    If you are able to get a shell on the router you can try pinging the SB8200 from it.  If that works it's a routing problem, if it doesn't it's something else and will require a bit more effort to troubleshoot.

Frequent Visitor

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9 Messages

1 y ago

Firmware is from Linksys, revision 2.0.8.194281

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