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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...
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.
schumaku
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. Loop prevention is disabled
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)?
For testing I eliminated all other devices attached to the switch.
There is however, a printer and network harddrive attached directly to the Gateway.
When attached to the switch I can print and access the harddrive.
However, there (still) is no internet access...
=== 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.
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