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Plusnet router does not recognise when some Ethernet devices are connected

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I was upgrading my mum's Plusnet router from a PN Hub One to the new Hub 
Two that they had sent her.

Because Plusnet hard-code the user's WAN username and password into the 
router, it was as simple as unplugging the PSU and Ethernet cables from 
the old router and plugging them into the new one (OK, swapping one PSU 
for the other as well).

But I noticed a "funny". Because of the shape of her house, she has a 
Linksys wireless access point in another part of the house, linked to 
the route by Ethernet, to give good wifi coverage (either from the 
router or from the AP).

And this access point was not being detected as being connected to the 
router, even though the AP was displaying a Link light and the Traffic 
light was flickering. I eliminated the cable by moving the AP into the 
same room as the router and connecting it by the supplied Ethernet 
cable. Still no joy.

So I tried plugging the old router in to the new one (*), using one of 
the old router's normal LAN sockets or else the WAN socket. Still no 
hint that the new router could see the old one as being plugged in.

(*) Wondering whether I could use it as an AP, if I turned off its DHCP.

After a lot of faffing around, something made me try the original config 
again - Linksys AP in its proper location connected by long Ethernet 
cable to router.

And it suddenly began to work: I could ping the static address that I'd 
configured in the AP yonks ago (for some reason that I've long 
forgotten, I couldn't let the router's DHCP allocate an IP to the AP) 
and devices which were connected to the AP's wifi worked perfectly. 
Despite all this, the router *still* didn't report the AP as being 
connected ;-)

Other devices (two PCs) that were connected by Ethernet were correctly 
reported by the router.


Has anyone seen a case of one or more devices being plugged into a 
router and yet the router fails to report that they are present?


Moral of the story: don't believe everything that a router tells you, 
and don't assume that a "not connected" device is actually not 
working... I wasted ages chasing a problem when the device was actually 
working fine, even if the router thought otherwise...

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Plusnet router does not recognise when some Ethernet devices are connected NY <me@privacy.net> - 2026-06-23 21:38 +0100
  Re: Plusnet router does not recognise when some Ethernet devices are connected Graham J <nobody@nowhere.co.uk> - 2026-06-23 21:51 +0100
    Re: Plusnet router does not recognise when some Ethernet devices are connected "Jeff Gaines" <jgnewsid@outlook.com> - 2026-06-23 21:09 +0000
      Re: Plusnet router does not recognise when some Ethernet devices are connected Andy Burns <usenet@andyburns.uk> - 2026-06-23 22:12 +0100
    Re: Plusnet router does not recognise when some Ethernet devices are connected NY <me@privacy.net> - 2026-06-23 22:10 +0100
      Re: Plusnet router does not recognise when some Ethernet devices are connected Brian Gregory <void-invalid-dead-dontuse@email.invalid> - 2026-06-23 23:36 +0100
        Re: Plusnet router does not recognise when some Ethernet devices are connected NY <me@privacy.net> - 2026-06-24 10:55 +0100
          Re: Plusnet router does not recognise when some Ethernet devices are connected Chris Green <cl@isbd.net> - 2026-06-24 17:22 +0100
          Re: Plusnet router does not recognise when some Ethernet devices are connected Woody <harrogate3@ntlworld.com> - 2026-06-24 18:15 +0100
            Re: Plusnet router does not recognise when some Ethernet devices are connected "Jeff Gaines" <jgnewsid@outlook.com> - 2026-06-24 18:45 +0000
  Re: Plusnet router does not recognise when some Ethernet devices are connected Andy Burns <usenet@andyburns.uk> - 2026-06-23 22:01 +0100
  Re: Plusnet router does not recognise when some Ethernet devices are connected Roger <invalid@invalid.invalid> - 2026-06-24 19:03 +0100
    Re: Plusnet router does not recognise when some Ethernet devices are connected NY <me@privacy.net> - 2026-06-24 21:48 +0100
      Re: Plusnet router does not recognise when some Ethernet devices are connected "Jeff Gaines" <jgnewsid@outlook.com> - 2026-06-25 07:35 +0000
        Re: Plusnet router does not recognise when some Ethernet devices are connected NY <me@privacy.net> - 2026-06-25 14:21 +0100
          Re: Plusnet router does not recognise when some Ethernet devices are connected Andy Burns <usenet@andyburns.uk> - 2026-06-25 14:40 +0100
            Re: Plusnet router does not recognise when some Ethernet devices are connected NY <me@privacy.net> - 2026-06-25 17:31 +0100
      Re: Plusnet router does not recognise when some Ethernet devices are connected Bob Pullen <me@privacy.net> - 2026-06-25 13:09 +0100

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