The PC which is part of this pair suddenly lost internet access. It is
cabled to the router. This old machine from the same hub, OK.
It was reaching the router OK, but no internet access. It's on a fixed IP
address. As a quick fix tried letting it sort itself out. Where of course
it changed to DCHP - but still not working. Claimed it couldn't find the
DNS server. Checks on drivers etc showed OK.

Seems Windows did an update a couple of days ago. Restored to before that
and everything works again.

It's a relatively new (and expensive) Gigabyte MB.

--
*I don't work here. I'm a consultant

Dave Plowman London SW
To e-mail, change noise into sound.

On 06/02/2021 12:37, Dave Plowman (News) wrote:
The PC which is part of this pair suddenly lost internet access. It is
cabled to the router. This old machine from the same hub, OK.
It was reaching the router OK, but no internet access. It's on a fixed IP
address. As a quick fix tried letting it sort itself out. Where of course
it changed to DCHP - but still not working. Claimed it couldn't find the
DNS server. Checks on drivers etc showed OK.

Seems Windows did an update a couple of days ago. Restored to before that
and everything works again.

It's a relatively new (and expensive) Gigabyte MB.

Open a Command Prompt and type "ipconfig /all" on both PCs and compare
the DNS Servers for both on the Ethernet adapter.

If you're using DHCP they should be the same. It is always possible that
the first PC has the DNS Server entry to some historical IP address and
not set through DHCP.

In article ,
Fredxx wrote:
On 06/02/2021 12:37, Dave Plowman (News) wrote:
The PC which is part of this pair suddenly lost internet access. It is
cabled to the router. This old machine from the same hub, OK.
It was reaching the router OK, but no internet access. It's on a fixed IP
address. As a quick fix tried letting it sort itself out. Where of course
it changed to DCHP - but still not working. Claimed it couldn't find the
DNS server. Checks on drivers etc showed OK.

Seems Windows did an update a couple of days ago. Restored to before that
and everything works again.

It's a relatively new (and expensive) Gigabyte MB.

Open a Command Prompt and type "ipconfig /all" on both PCs and compare
the DNS Servers for both on the Ethernet adapter.

If you're using DHCP they should be the same. It is always possible that
the first PC has the DNS Server entry to some historical IP address and
not set through DHCP.

I've got everything on this LAN set to fixed IP. Have a list of what they
all are.

Never had a problem with file sharing under the Win7 Homegroup system.

Total nightmare with Win10 - Google if you don't believe me.

--
*A picture may be worth a thousand words, but it uses up a thousand times more memory.

Dave Plowman London SW
To e-mail, change noise into sound.

On 06/02/2021 14:45, Dave Plowman (News) wrote:
In article ,
Fredxx wrote:
On 06/02/2021 12:37, Dave Plowman (News) wrote:
The PC which is part of this pair suddenly lost internet access. It is
cabled to the router. This old machine from the same hub, OK.
It was reaching the router OK, but no internet access. It's on a fixed IP
address. As a quick fix tried letting it sort itself out. Where of course
it changed to DCHP - but still not working. Claimed it couldn't find the
DNS server. Checks on drivers etc showed OK.

Seems Windows did an update a couple of days ago. Restored to before that
and everything works again.

It's a relatively new (and expensive) Gigabyte MB.

Open a Command Prompt and type "ipconfig /all" on both PCs and compare
the DNS Servers for both on the Ethernet adapter.

If you're using DHCP they should be the same. It is always possible that
the first PC has the DNS Server entry to some historical IP address and
not set through DHCP.

I've got everything on this LAN set to fixed IP. Have a list of what they
all are.

I do it slightly differently. I have all my network on DHCP, but have
the DHCP server set to give the same IP addresses out to those MAC
addresses each time they connect.

Steve Walker wrote:
On 06/02/2021 14:45, Dave Plowman (News) wrote:
In article ,
Fredxx wrote:
On 06/02/2021 12:37, Dave Plowman (News) wrote:
The PC which is part of this pair suddenly lost internet access. It is
cabled to the router. This old machine from the same hub, OK.
It was reaching the router OK, but no internet access. It's on a fixed IP
address. As a quick fix tried letting it sort itself out. Where of course
it changed to DCHP - but still not working. Claimed it couldn't find the
DNS server. Checks on drivers etc showed OK.

Seems Windows did an update a couple of days ago. Restored to before that
and everything works again.

It's a relatively new (and expensive) Gigabyte MB.

Open a Command Prompt and type "ipconfig /all" on both PCs and compare
the DNS Servers for both on the Ethernet adapter.

If you're using DHCP they should be the same. It is always possible that
the first PC has the DNS Server entry to some historical IP address and
not set through DHCP.

I've got everything on this LAN set to fixed IP. Have a list of what they
all are.

I do it slightly differently. I have all my network on DHCP, but have
the DHCP server set to give the same IP addresses out to those MAC
addresses each time they connect.

Unless you re-use addresses that happens anyway with DHCP, I don't
think any system on my LAN has ever changed its IP and nearly all are
assigned by my DHCP server.

--
Chris Green
·

On 06/02/2021 19:08, Chris Green wrote:
Steve Walker wrote:
On 06/02/2021 14:45, Dave Plowman (News) wrote:
In article ,
Fredxx wrote:
On 06/02/2021 12:37, Dave Plowman (News) wrote:
The PC which is part of this pair suddenly lost internet access. It is
cabled to the router. This old machine from the same hub, OK.
It was reaching the router OK, but no internet access. It's on a fixed IP
address. As a quick fix tried letting it sort itself out. Where of course
it changed to DCHP - but still not working. Claimed it couldn't find the
DNS server. Checks on drivers etc showed OK.

Seems Windows did an update a couple of days ago. Restored to before that
and everything works again.

It's a relatively new (and expensive) Gigabyte MB.

Open a Command Prompt and type "ipconfig /all" on both PCs and compare
the DNS Servers for both on the Ethernet adapter.

If you're using DHCP they should be the same. It is always possible that
the first PC has the DNS Server entry to some historical IP address and
not set through DHCP.

I've got everything on this LAN set to fixed IP. Have a list of what they
all are.

I do it slightly differently. I have all my network on DHCP, but have
the DHCP server set to give the same IP addresses out to those MAC
addresses each time they connect.

Unless you re-use addresses that happens anyway with DHCP, I don't
think any system on my LAN has ever changed its IP and nearly all are
assigned by my DHCP server.

I like to group them - so xxx.xxx.xxx.10 to .39 is available for PCs (5
of them), laptops (2), tablets (3). .40 to .49 for printers (2). .50 to
..69 Satellite boxes (4), music players (2), smart TVs (2), other set-top
boxes (2). .80 to .89 for mobile phones and so on, with .190 to .254 for
home server ESXI host, Nethserver based Domain controller, storage
server, email server, etc. and other virtual machines.

Plus, I want to be absolutely sure that no address changes when the
network and everything attached is restarted, as satellite and set-top
boxes need to access each other and the server, while the music players
need to access the server - and a whole lot more.

We are a bit of a techie household - except for my wife who doesn't know
how any of it works. It has made online, remote learning and working
from home easy though, as there is no competition for machines to work on.

Chris Green has brought this to us :
Unless you re-use addresses that happens anyway with DHCP, I don't
think any system on my LAN has ever changed its IP and nearly all are
assigned by my DHCP server.

Switched off, items can time out from the DHCP server, unless you set
them up not to.

Steve Walker laid this down on his screen :
I like to group them - so xxx.xxx.xxx.10 to .39 is available for PCs (5 of
them), laptops (2), tablets (3). .40 to .49 for printers (2). .50 to .69
Satellite boxes (4), music players (2), smart TVs (2), other set-top boxes
(2). .80 to .89 for mobile phones and so on, with .190 to .254 for home
server ESXI host, Nethserver based Domain controller, storage server, email
server, etc. and other virtual machines.

Plus, I want to be absolutely sure that no address changes when the network
and everything attached is restarted, as satellite and set-top boxes need to
access each other and the server, while the music players need to access the
server - and a whole lot more.

Same here..

Harry Bloomfield, Esq. wrote:
Chris Green has brought this to us :
Unless you re-use addresses that happens anyway with DHCP, I don't
think any system on my LAN has ever changed its IP and nearly all are
assigned by my DHCP server.

Switched off, items can time out from the DHCP server, unless you set
them up not to.

Yes, but when they reconnect they get the same IP back. E.g. I go
away for weeks at a time with my laptop but when I come back home it
always gets the same IP. This is how it's meant to work, the DHCP
server *does* remember MAC addresses and will give the same address to
the same device every time unless there's a very good reason for not
doing so.

--
Chris Green
·

On Sat, 06 Feb 2021 17:17:27 +0000, Steve Walker wrote:

I do it slightly differently. I have all my network on DHCP, but have
the DHCP server set to give the same IP addresses out to those MAC
addresses each time they connect.

So do I. Important since there are three different IP ranges, only onwe
of which is public.

Some Apple devices are a pain, as they do 'anti tracking' and report
random MAC addresses on each reboot.

--
My posts are my copyright and if @diy_forums or Home Owners' Hub
wish to copy them they can pay me £1 a message.
Use the BIG mirror service in the UK: http://www.mirrorservice.org
*lightning surge protection* - a w_tom conductor

On 06/02/2021 14:45, Dave Plowman (News) wrote:
In article ,
Fredxx wrote:
On 06/02/2021 12:37, Dave Plowman (News) wrote:
The PC which is part of this pair suddenly lost internet access. It is
cabled to the router. This old machine from the same hub, OK.
It was reaching the router OK, but no internet access. It's on a fixed IP
address. As a quick fix tried letting it sort itself out. Where of course
it changed to DCHP - but still not working. Claimed it couldn't find the
DNS server. Checks on drivers etc showed OK.

Seems Windows did an update a couple of days ago. Restored to before that
and everything works again.

It's a relatively new (and expensive) Gigabyte MB.

Open a Command Prompt and type "ipconfig /all" on both PCs and compare
the DNS Servers for both on the Ethernet adapter.

If you're using DHCP they should be the same. It is always possible that
the first PC has the DNS Server entry to some historical IP address and
not set through DHCP.

I've got everything on this LAN set to fixed IP. Have a list of what they
all are.

Never had a problem with file sharing under the Win7 Homegroup system.

Total nightmare with Win10 - Google if you don't believe me.

+1

Having dabbled with static IPs in the past, I've been relying on DHCP on
Win10. Most of the time it works, but it does occasionally have hissy
fits that I have never really been able to explain. Random power cycling
eventually sorts it, sometimes have to delete and reinstall printers too.

I've got something over 50 devices on my system now (including phones
and laptops belonging to the kids when they visit), I can see subnets
looming.

On 06/02/2021 22:00, Chris Green wrote:
Harry Bloomfield, Esq. wrote:
Chris Green has brought this to us :
Unless you re-use addresses that happens anyway with DHCP, I don't
think any system on my LAN has ever changed its IP and nearly all are
assigned by my DHCP server.

Switched off, items can time out from the DHCP server, unless you set
them up not to.

Yes, but when they reconnect they get the same IP back. E.g. I go
away for weeks at a time with my laptop but when I come back home it
always gets the same IP. This is how it's meant to work, the DHCP
server *does* remember MAC addresses and will give the same address to
the same device every time unless there's a very good reason for not
doing so.

But if you have a power cut or switch the electric off to do some DIY,
the server and a number of devices will all lose power and may not get
the same addresses - they may, but there is no certainty.

On 06/02/2021 22:48, Bob Eager wrote:
On Sat, 06 Feb 2021 17:17:27 +0000, Steve Walker wrote:

I do it slightly differently. I have all my network on DHCP, but have
the DHCP server set to give the same IP addresses out to those MAC
addresses each time they connect.

So do I. Important since there are three different IP ranges, only onwe
of which is public.

Some Apple devices are a pain, as they do 'anti tracking' and report
random MAC addresses on each reboot.

I had the opposite problem, addresses being completely non-random. I
relegated one of my satellite boxes to the conservatory, put a new one
in the living room and restored the (OpenVIX) setup from disk - and
found that restoring the old setup to the new box also copied the old
MAC address to the new device, which I certainly did not expect!

On 06/02/2021 22:50, newshound wrote:
On 06/02/2021 14:45, Dave Plowman (News) wrote:
In article ,
Â*Â*Â* Fredxx wrote:
On 06/02/2021 12:37, Dave Plowman (News) wrote:
The PC which is part of this pair suddenly lost internet access. It is
cabled to the router. This old machine from the same hub, OK.
It was reaching the router OK, but no internet access. It's on a
fixed IP
address. As a quick fix tried letting it sort itself out. Where of
course
it changed to DCHP - but still not working. Claimed it couldn't find
the
DNS server. Checks on drivers etc showed OK.

Seems Windows did an update a couple of days ago. Restored to before
that
and everything works again.

It's a relatively new (and expensive) Gigabyte MB.

Open a Command Prompt and type "ipconfig /all" on both PCs and compare
the DNS Servers for both on the Ethernet adapter.

If you're using DHCP they should be the same. It is always possible that
the first PC has the DNS Server entry to some historical IP address and
not set through DHCP.

I've got everything on this LAN set to fixed IP. Have a list of what they
all are.

Never had a problem with file sharing under the Win7 Homegroup system.

Total nightmare with Win10 - Google if you don't believe me.

+1

Having dabbled with static IPs in the past, I've been relying on DHCP on
Win10. Most of the time it works, but it does occasionally have hissy
fits that I have never really been able to explain. Random power cycling
eventually sorts it, sometimes have to delete and reinstall printers too.

I've got something over 50 devices on my system now (including phones
and laptops belonging to the kids when they visit), I can see subnets
looming.

With a decent router, you can do VLANs too.

On Sat, 06 Feb 2021 22:51:51 +0000, Steve Walker wrote:

On 06/02/2021 22:00, Chris Green wrote:
Harry Bloomfield, Esq. wrote:
Chris Green has brought this to us :
Unless you re-use addresses that happens anyway with DHCP, I don't
think any system on my LAN has ever changed its IP and nearly all are
assigned by my DHCP server.

Switched off, items can time out from the DHCP server, unless you set
them up not to.

Yes, but when they reconnect they get the same IP back. E.g. I go away
for weeks at a time with my laptop but when I come back home it always
gets the same IP. This is how it's meant to work, the DHCP server
*does* remember MAC addresses and will give the same address to the
same device every time unless there's a very good reason for not doing
so.

But if you have a power cut or switch the electric off to do some DIY,
the server and a number of devices will all lose power and may not get
the same addresses - they may, but there is no certainty.

There is certainty if you configure the DHCP server to assign a
particular IP address to a particular MAC address. That is what is being
said above by Chris, and it's how I do it too. I have absolute certainty
of IP addresses for all devices except those used by visitors (and they
come out of a small pool).



--
My posts are my copyright and if @diy_forums or Home Owners' Hub
wish to copy them they can pay me £1 a message.
Use the BIG mirror service in the UK: http://www.mirrorservice.org
*lightning surge protection* - a w_tom conductor

On 06/02/2021 22:57, Bob Eager wrote:
On Sat, 06 Feb 2021 22:51:51 +0000, Steve Walker wrote:

On 06/02/2021 22:00, Chris Green wrote:
Harry Bloomfield, Esq. wrote:
Chris Green has brought this to us :
Unless you re-use addresses that happens anyway with DHCP, I don't
think any system on my LAN has ever changed its IP and nearly all are
assigned by my DHCP server.

Switched off, items can time out from the DHCP server, unless you set
them up not to.

Yes, but when they reconnect they get the same IP back. E.g. I go away
for weeks at a time with my laptop but when I come back home it always
gets the same IP. This is how it's meant to work, the DHCP server
*does* remember MAC addresses and will give the same address to the
same device every time unless there's a very good reason for not doing
so.

But if you have a power cut or switch the electric off to do some DIY,
the server and a number of devices will all lose power and may not get
the same addresses - they may, but there is no certainty.

There is certainty if you configure the DHCP server to assign a
particular IP address to a particular MAC address. That is what is being
said above by Chris, and it's how I do it too. I have absolute certainty
of IP addresses for all devices except those used by visitors (and they
come out of a small pool).

It was me that originally said that. My reading of Chris's post was that
he was saying that they normally get re-assigned the same IP address
anyway, without setting specific IPs in the DHCP server. Then I was
saying that they may not if restarting the network and devices after a
power out.

"Steve Walker" wrote in message
...
On 06/02/2021 22:00, Chris Green wrote:
Harry Bloomfield, Esq. wrote:
Chris Green has brought this to us :
Unless you re-use addresses that happens anyway with DHCP, I don't
think any system on my LAN has ever changed its IP and nearly all are
assigned by my DHCP server.

Switched off, items can time out from the DHCP server, unless you set
them up not to.

Yes, but when they reconnect they get the same IP back. E.g. I go
away for weeks at a time with my laptop but when I come back home it
always gets the same IP. This is how it's meant to work, the DHCP
server *does* remember MAC addresses and will give the same address to
the same device every time unless there's a very good reason for not
doing so.

But if you have a power cut or switch the electric off to do some DIY, the
server and a number of devices will all lose power and may not get the
same addresses - they may, but there is no certainty.

No reason why the best routers cant keep that very small
table in non volatile memory so that doesnt happen.

On Sun, 7 Feb 2021 10:26:47 +1100, cantankerous trolling geezer Rodent
Speed, the auto-contradicting senile sociopath, blabbered, again:

FLUSH the trolling senile asshole's latest troll**** unread

--
Bod addressing abnormal senile quarreller Rot:
"Do you practice arguing with yourself in an empty room?"
MID:

On Sat, 06 Feb 2021 23:02:03 +0000, Steve Walker wrote:

On 06/02/2021 22:57, Bob Eager wrote:
On Sat, 06 Feb 2021 22:51:51 +0000, Steve Walker wrote:

On 06/02/2021 22:00, Chris Green wrote:
Harry Bloomfield, Esq. wrote:
Chris Green has brought this to us :
Unless you re-use addresses that happens anyway with DHCP, I don't
think any system on my LAN has ever changed its IP and nearly all
are assigned by my DHCP server.

Switched off, items can time out from the DHCP server, unless you
set them up not to.

Yes, but when they reconnect they get the same IP back. E.g. I go
away for weeks at a time with my laptop but when I come back home it
always gets the same IP. This is how it's meant to work, the DHCP
server *does* remember MAC addresses and will give the same address
to the same device every time unless there's a very good reason for
not doing so.

But if you have a power cut or switch the electric off to do some DIY,
the server and a number of devices will all lose power and may not get
the same addresses - they may, but there is no certainty.

There is certainty if you configure the DHCP server to assign a
particular IP address to a particular MAC address. That is what is
being said above by Chris, and it's how I do it too. I have absolute
certainty of IP addresses for all devices except those used by visitors
(and they come out of a small pool).

It was me that originally said that. My reading of Chris's post was that
he was saying that they normally get re-assigned the same IP address
anyway, without setting specific IPs in the DHCP server. Then I was
saying that they may not if restarting the network and devices after a
power out.

Ah, OK. I was confused.

--
My posts are my copyright and if @diy_forums or Home Owners' Hub
wish to copy them they can pay me £1 a message.
Use the BIG mirror service in the UK: http://www.mirrorservice.org
*lightning surge protection* - a w_tom conductor

On 06/02/2021 22:00, Chris Green wrote:
Harry Bloomfield, Esq. wrote:
Chris Green has brought this to us :
Unless you re-use addresses that happens anyway with DHCP, I don't
think any system on my LAN has ever changed its IP and nearly all are
assigned by my DHCP server.

Switched off, items can time out from the DHCP server, unless you set
them up not to.

Yes, but when they reconnect they get the same IP back. E.g. I go
away for weeks at a time with my laptop but when I come back home it
always gets the same IP. This is how it's meant to work, the DHCP
server *does* remember MAC addresses and will give the same address to
the same device every time unless there's a very good reason for not
doing so.

If the DHCP server remains powered all the time, and only the client is
disconnected, then *most* routers will reassign the same IP. Generally
this is an "ok" thing on home networks, although it can be a limitation
where there are lots of guest devices that come and go, since you will
run out of DHCP pool addresses eventually, and the router will be forced
to reallocate IP addresses to new MAC addresses. So stuff works for a
fair while before something breaks without warning. (like someone's HP
wifi connected printer "vanishes" after many weeks of working just fine!)

If the router is powered off, then all bets are off, since it may have
no non volatile record of the IP to MAC parings.

If you want to have static addresses, but have them allocated via
DHCP[1], then you need to use the capabilities available in many routers
to permanently bind an IP to a MAC address, and then save that in the
routers non volatile configuration.

Lastly remember that not all SOHO routers are created equally - so do a
more reliable job of address allocation than others.

[1] this being the industry preferred way of allocating static IP
addresses on larger networks these days.

--
Cheers,

John.

/================================================== ===============\
| Internode Ltd - http://www.internode.co.uk |
|-----------------------------------------------------------------|
| John Rumm - john(at)internode(dot)co(dot)uk |
\================================================= ================/

Steve Walker wrote:
On 06/02/2021 22:00, Chris Green wrote:
Harry Bloomfield, Esq. wrote:
Chris Green has brought this to us :
Unless you re-use addresses that happens anyway with DHCP, I don't
think any system on my LAN has ever changed its IP and nearly all are
assigned by my DHCP server.

Switched off, items can time out from the DHCP server, unless you set
them up not to.

Yes, but when they reconnect they get the same IP back. E.g. I go
away for weeks at a time with my laptop but when I come back home it
always gets the same IP. This is how it's meant to work, the DHCP
server *does* remember MAC addresses and will give the same address to
the same device every time unless there's a very good reason for not
doing so.

But if you have a power cut or switch the electric off to do some DIY,
the server and a number of devices will all lose power and may not get
the same addresses - they may, but there is no certainty.

There is virtually absolute certainty, the DHCP server stores its
information, it's not volatile, so even if you turn the DHCP server
off it will come back looking the same.

That's not to say you shouldn't be explicit about things that you want
to have fixed addresses, I have a printer specified in my DHCP server
configuration so I can be absolutely sure it always has the same
address.

--
Chris Green
·

Steve Walker wrote:
On 06/02/2021 22:48, Bob Eager wrote:
On Sat, 06 Feb 2021 17:17:27 +0000, Steve Walker wrote:

I do it slightly differently. I have all my network on DHCP, but have
the DHCP server set to give the same IP addresses out to those MAC
addresses each time they connect.

So do I. Important since there are three different IP ranges, only onwe
of which is public.

Some Apple devices are a pain, as they do 'anti tracking' and report
random MAC addresses on each reboot.

I had the opposite problem, addresses being completely non-random. I
relegated one of my satellite boxes to the conservatory, put a new one
in the living room and restored the (OpenVIX) setup from disk - and
found that restoring the old setup to the new box also copied the old
MAC address to the new device, which I certainly did not expect!

Exactly what I've been saying all along, you'll just about always get
the same IP for a device except when there's a very good reason for it
being otherwise.

Did you really mean MAC address?

--
Chris Green
·

On 07/02/2021 08:58, Chris Green wrote:
Steve Walker wrote:
On 06/02/2021 22:00, Chris Green wrote:
Harry Bloomfield, Esq. wrote:
Chris Green has brought this to us :
Unless you re-use addresses that happens anyway with DHCP, I don't
think any system on my LAN has ever changed its IP and nearly all are
assigned by my DHCP server.

Switched off, items can time out from the DHCP server, unless you set
them up not to.

Yes, but when they reconnect they get the same IP back. E.g. I go
away for weeks at a time with my laptop but when I come back home it
always gets the same IP. This is how it's meant to work, the DHCP
server *does* remember MAC addresses and will give the same address to
the same device every time unless there's a very good reason for not
doing so.

But if you have a power cut or switch the electric off to do some DIY,
the server and a number of devices will all lose power and may not get
the same addresses - they may, but there is no certainty.

There is virtually absolute certainty, the DHCP server stores its
information, it's not volatile, so even if you turn the DHCP server
off it will come back looking the same.

That's not to say you shouldn't be explicit about things that you want
to have fixed addresses, I have a printer specified in my DHCP server
configuration so I can be absolutely sure it always has the same
address.

Most home networks use the router's DHCP server and there is no
guarantee that any of them (particularly ISP supplied ones) store such
data in non-volatile memory. Some may, but many won't.

On 07/02/2021 09:00, Chris Green wrote:
Steve Walker wrote:
On 06/02/2021 22:48, Bob Eager wrote:
On Sat, 06 Feb 2021 17:17:27 +0000, Steve Walker wrote:

I do it slightly differently. I have all my network on DHCP, but have
the DHCP server set to give the same IP addresses out to those MAC
addresses each time they connect.

So do I. Important since there are three different IP ranges, only onwe
of which is public.

Some Apple devices are a pain, as they do 'anti tracking' and report
random MAC addresses on each reboot.

I had the opposite problem, addresses being completely non-random. I
relegated one of my satellite boxes to the conservatory, put a new one
in the living room and restored the (OpenVIX) setup from disk - and
found that restoring the old setup to the new box also copied the old
MAC address to the new device, which I certainly did not expect!

Exactly what I've been saying all along, you'll just about always get
the same IP for a device except when there's a very good reason for it
being otherwise.

Did you really mean MAC address?

Yes, I really did mean MAC address. OpenVIX's backup and restore
apparently includes the MAC address and gives no warning when restoring
to a new machine. Of course the DHCP server saw the MAC on the new
machine and issued the reserved IP address, but then it also got a
request from the old machine, using the same MAC address.

Once I knew what was going on, it was simple to change one of the MAC
addresses to remove the conflict.

On 06/02/2021 14:45, Dave Plowman (News) wrote:
In article ,
Fredxx wrote:
On 06/02/2021 12:37, Dave Plowman (News) wrote:
The PC which is part of this pair suddenly lost internet access. It is
cabled to the router. This old machine from the same hub, OK.
It was reaching the router OK, but no internet access. It's on a fixed IP
address. As a quick fix tried letting it sort itself out. Where of course
it changed to DCHP - but still not working. Claimed it couldn't find the
DNS server. Checks on drivers etc showed OK.

Seems Windows did an update a couple of days ago. Restored to before that
and everything works again.

It's a relatively new (and expensive) Gigabyte MB.

Open a Command Prompt and type "ipconfig /all" on both PCs and compare
the DNS Servers for both on the Ethernet adapter.

If you're using DHCP they should be the same. It is always possible that
the first PC has the DNS Server entry to some historical IP address and
not set through DHCP.

I've got everything on this LAN set to fixed IP. Have a list of what they
all are.

Ok The two important ones to look at are the gateway address and the DNS
server address.

Never had a problem with file sharing under the Win7 Homegroup system.

Total nightmare with Win10 - Google if you don't believe me.

I am aware of issues since they turned off SMB 1.0 by default. I had to
turn it back on again to see my NAS servers. After that it seems ok.

https://www.windowscentral.com/how-a...bv1-windows-10

Microsoft removed this by default due to security issues.

On 07/02/2021 21:54, Fredxx wrote:
On 06/02/2021 14:45, Dave Plowman (News) wrote:
In article ,
Â*Â*Â* Fredxx wrote:
On 06/02/2021 12:37, Dave Plowman (News) wrote:
The PC which is part of this pair suddenly lost internet access. It is
cabled to the router. This old machine from the same hub, OK.
It was reaching the router OK, but no internet access. It's on a
fixed IP
address. As a quick fix tried letting it sort itself out. Where of
course
it changed to DCHP - but still not working. Claimed it couldn't find
the
DNS server. Checks on drivers etc showed OK.

Seems Windows did an update a couple of days ago. Restored to before
that
and everything works again.

It's a relatively new (and expensive) Gigabyte MB.

Open a Command Prompt and type "ipconfig /all" on both PCs and compare
the DNS Servers for both on the Ethernet adapter.

If you're using DHCP they should be the same. It is always possible that
the first PC has the DNS Server entry to some historical IP address and
not set through DHCP.

I've got everything on this LAN set to fixed IP. Have a list of what they
all are.

Ok The two important ones to look at are the gateway address and the DNS
server address.

Never had a problem with file sharing under the Win7 Homegroup system.

Total nightmare with Win10 - Google if you don't believe me.

I am aware of issues since they turned off SMB 1.0 by default. I had to
turn it back on again to see my NAS servers. After that it seems ok.

https://www.windowscentral.com/how-a...bv1-windows-10


Microsoft removed this by default due to security issues.

A quick and easy test to see if this is why you can't access a share, is
to ping the server. If you get a response to a ping, but no response on
the share, then lack of SMB1 capability is a common cause.


--
Cheers,

John.

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