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Forum Discussion
JGS516PE no internet
I'm missing something!? (so is NetGear's support, as they can't resolve either). Needed exta ports so we replaced a (working with no issues) Linksys AE3500 router (in bridge mode) with the JGS516...
Strange - it's just a L2 switch.
Using a complete and healthy RJ45 network cable with four pairs/eight strands to connect one Xfinity XB7 LAN port with a port on the switch?
What show the LEDs (certainly exist on the switch port) for the connection to the router?
bhamberg wrote:I can access the NetGear GUI but not the (Xfinity XB7-7 router)
The switch does have received an IP address on the 10.0.0.0 network from the router DHCP?
Have updated the JGS516PE to the current firmware (-> https://www.netgear.com/support/product/JGS516PE.aspx#download ) and done a factory reset?
bhamberg wrote:What could i possibly be missing??
What IP addresses are you using on the switch and the computer accessing the switch Web UI?
What does the Netgear Switch Discovery Tool show?
In case these are some 192.168.0.x addresses in use - and assuming your router was not reconfigured to use a different subnet - you can't access neither the router LAN IP acting as the default gateway nor the Internet form that computer obviously.
The computer connected to one of the router LAN ports does get a 10.x.x.x address and you can access the Internet?
Same port connected to the switch (while the switch is connected to the known working LAN port) does not and fail?
schumaku - all items NG support has asked (over and over and over!!! 🥵)
- New cables - tested good (VDV scout)
- LED - green, blinking
- Switch: 10.0.0.63 (DHCP enabled)
- Discovery tool shows: 10.0.0.63
- Gateway: 10.0.0.1 (can not access the gateway's GUI or ping)
- PC: 10.0.0.228 (auto)
- Linksys AE3500: 10.0.0.128 (set to bridge mode)
- JGS516: brand new with most recent FW (replaced by NG once when they couldn't find the problem)
- Bottom line: internet access using Linksys AE3500. No access as soon and the AE355oo is removed and the JGS516 is connected
bhamberg wrote:schumaku - all items NG support has asked (over and over and over!!! 🥵)
Switch: 10.0.0.63 (DHCP enabled)
Discovery tool shows: 10.0.0.63
Gateway: 10.0.0.1 (can not access the gateway's GUI or ping)
PC: 10.0.0.228 (auto)
Sorry for the questions - so why not provide this information right away? Please understand we're just users, not Netgear, so no idea what steps were done before.
The router is serving DHCP and operating on it's default LAN subnet, and the switch controller does get IP config by DHCP obviously, so there is communication at lest near to start-up time.
When you say PC auto - I understand .228 the fall-back autoconfig on the Windows system in this case, not DHCP. Correct?
Is one port LED (I have the uplink to the router in mind) flashing in a 0.5 Hz (twice a second) clock at constant speed? -> Open the switch config, head to System -> Management -> Loop Prevention and disable the feature (it's on by default AFAIK).
Also confirm the EA3500 is out of the test equation for the moment, and no network loop is in place.
The last idea coming up would be trying to connect the switch to one fo the Linksys EA3500 ports and retry.
schumakuSorry for the questions - so why not provide this information right away? Please understand we're just users, not Netgear, so no idea what steps were done before. Understood, didn't know the level of detail anyone would need
The router is serving DHCP and operating on it's default LAN subnet, and the switch controller does get IP config by DHCP obviously, so there is communication at lest near to start-up time. Yes, the switch is being assigned an IP, I can access the switch's GUI but can not access or ping the gateway/router
When you say PC auto - I understand .228 the fall-back autoconfig on the Windows system in this case, not DHCP. Correct? Windows is auto-assigning the IP to the PC (NOT static)
Is one port LED (I have the uplink to the router in mind) flashing in a 0.5 Hz (twice a second) clock at constant speed? -> Open the switch config, head to System -> Management -> Loop Prevention and disable the feature (it's on by default AFAIK). Yes, both lights are flashing (green) 2x a second. I will try the "Loop Prevention" and advise (for my edification, what is loop prevention??)
Also confirm the EA3500 is out of the test equation for the moment, and no network loop is in place. Correct
The last idea coming up would be trying to connect the switch to one fo the Linksys EA3500 ports and retry. Done (with NG tech support) with NO change, no internet.)
bhamberg wrote:
Is one port LED (I have the uplink to the router in mind) flashing in a 0.5 Hz (twice a second) clock at constant speed? -> Open the switch config, head to System -> Management -> Loop Prevention and disable the feature (it's on by default AFAIK). Yes, both lights are flashing (green) 2x a second. I will try the "Loop Prevention" and advise (for my edification, what is loop prevention??)With Loop Prevention active, the switch does sent out some specally crafted frames on all links - if it does see the same frame coming back over a different port, the witch does try to break the loop (which can ause a lot of network broadcast noise) and disable one port.
With the port connecting towards the router disabled by the loop prevention ... obvious there won't be any Internet access.
For completeness, do you have a list of potentially special devies connectd to your network, e.g. devices like media players connecting by Ethernet and WIFi for example (Sonos comes into my mind)?
=== edit - just FYI ===
bhamberg wrote:
When you say PC auto - I understand .228 the fall-back autoconfig on the Windows system in this case, not DHCP. Correct? Windows is auto-assigning the IP to the PC (NOT static)By default, Windows 10 (and several major versions before) would self-assing so called Zero-config addresses in the 169.254.0.0/16 subnet as link-local addresses. So this could be DHCP assigned by the router, or configured as an alternate IP address on the network adpater - this will jump in place if there is no DHCP address assigned.
bhamberg wrote:
Is one port LED (I have the uplink to the router in mind) flashing in a 0.5 Hz (twice a second) clock at constant speed? -> Open the switch config, head to System -> Management -> Loop Prevention and disable the feature (it's on by default AFAIK).Yes, both lights are flashing (green) 2x a second. I will try the "Loop Prevention" and advise (for my edification, what is loop prevention??)
If this flashing is going on continuously, I'm pretty much convinced the loop prevention has shut down the uplink port to the router. Thus nothing connected to the switch can gain access to the router and the Internet therefore.
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