> When I start virtual machine (winxp home) I get a message on the host
> saying: "there is an IP address conflict with another system on the
> network".
> It later says this on the guest, too. I already tried disabling my
> firewall
> (I have Symantec Endpoint protection), and tried (but failed) to change
> the
> IP address on the guest manually (What I got was "the static IP address
> you
> have assigned is being used by another system on the network" (message is
> not
> exact, will try to get exact message in next response)).
>
> I don't know how this happened, because it worked before and I don't know
> of
> doing any change, such as installing a program or changing network
> adapters.
>
> Thanks in advance.

> When I start virtual machine (winxp home) I get a message on the host
> saying: "there is an IP address conflict with another system on the
> network".
> It later says this on the guest, too. I already tried disabling my
> firewall
> (I have Symantec Endpoint protection), and tried (but failed) to change
> the
> IP address on the guest manually (What I got was "the static IP address
> you
> have assigned is being used by another system on the network" (message is
> not
> exact, will try to get exact message in next response)).
>
> I don't know how this happened, because it worked before and I don't know
> of
> doing any change, such as installing a program or changing network
> adapters.

> Firstly, you should be able to fix this fairly easily, depending on how your
> network is configured. Assuming you have a router (or some other device
> acting as a DHCP server), make sure that your virtual machine is configured
> to receive an IP address automatically, not manually...
>
>
> --
> Mark Rae
> ASP.NET MVP
> http://www.markrae.net
>
>

> "penguin" <(email address - cut out)> wrote in message
> news:(email address - cut out)...
>> When I start virtual machine (winxp home) I get a message on the host
>> saying: "there is an IP address conflict with another system on the
>> network".
>> It later says this on the guest, too. I already tried disabling my
>> firewall
>> (I have Symantec Endpoint protection), and tried (but failed) to change
>> the
>> IP address on the guest manually (What I got was "the static IP address
>> you
>> have assigned is being used by another system on the network" (message is
>> not
>> exact, will try to get exact message in next response)).
>>
>> I don't know how this happened, because it worked before and I don't know
>> of
>> doing any change, such as installing a program or changing network
>> adapters.
>>
>> Thanks in advance.
>
> I assume you have a router assigning the addresses automatically. I had this
> problem repeatedly for awhile suddenly and seemingly out of nowhere. The one
> reliable way to fix it was to unplug the router and modem and shut down all
> physical computers on the network. Wait a few minutes and then boot the
> physical computers as close together as possible. When the desktop appears
> plug in the modem, when it synchs then plugin the router. This forces the
> router to assign new IP addresses to each computer. I then would start all
> my virtual machines and make sure each machine had its own address. I have
> two physical computers and several virtual machines on one of the physical
> computers. Sometimes, the IP address conflict was between the two physical
> computers, but other times it was between a virtual computer and the host
> physical computer. There are other ways to fix the problem but none worked
> consistently for me and actually usually were a waste of time because they
> didn't work and I still had to force the router to reassign new addresses.
>
> I never learned what caused this sudden problem. After a few weeks, it
> disappeared as suddenly as it had appeared and I haven't had the problem
> since but I read that this problem can appear suddenly, disappear suddenly,
> and then reappear months, years later so I might have it again sometime.
> This started the first time after I had my older physical computer shutdown
> for about 24 hours (usually they are both on 24/7) and when I booted it
> after being shutdown I saw, almost immediately on the newer XP computer, the
> notice in the systray about an IP address conflict. I think the router
> assigned the address the older 98SE computer usually uses to the XP computer
> because it was available for 24 hours when the older computer was shut down.
>
> The conflicts between the virtual machines and either one of the physical
> machines, or between two virtual machines, were really puzzling and nothing
> I tried (after Googling the problem) fixed it reliably except the
> irritating, time consuming method I mentioned above. It did seem though
> that if I did not use a virtual machine for several days then it would have
> this conflict when I started it but I don't think not using a virtual
> machine for days or a week or longer should have anything to do with this
> because before I had this problem many times I didn't use a virtual machine
> for days or a week or so and had no ip address conflicts. So, the reason for
> this sudden problem (and its subsequent sudden disappearance after annoying
> me for about a month) remain a mystery.
>
>

> --->
> > "penguin" <(email address - cut out)> wrote in message
> > news:(email address - cut out)...
> >> When I start virtual machine (winxp home) I get a message on the host
> >> saying: "there is an IP address conflict with another system on the
> >> network".
> >> It later says this on the guest, too. I already tried disabling my
> >> firewall
> >> (I have Symantec Endpoint protection), and tried (but failed) to change
> >> the
> >> IP address on the guest manually (What I got was "the static IP address
> >> you
> >> have assigned is being used by another system on the network" (message is
> >> not
> >> exact, will try to get exact message in next response)).
> >>
> >> I don't know how this happened, because it worked before and I don't know
> >> of
> >> doing any change, such as installing a program or changing network
> >> adapters.
> >>
> >> Thanks in advance.
> >
> > I assume you have a router assigning the addresses automatically. I had this
> > problem repeatedly for awhile suddenly and seemingly out of nowhere. The one
> > reliable way to fix it was to unplug the router and modem and shut down all
> > physical computers on the network. Wait a few minutes and then boot the
> > physical computers as close together as possible. When the desktop appears
> > plug in the modem, when it synchs then plugin the router. This forces the
> > router to assign new IP addresses to each computer. I then would start all
> > my virtual machines and make sure each machine had its own address. I have
> > two physical computers and several virtual machines on one of the physical
> > computers. Sometimes, the IP address conflict was between the two physical
> > computers, but other times it was between a virtual computer and the host
> > physical computer. There are other ways to fix the problem but none worked
> > consistently for me and actually usually were a waste of time because they
> > didn't work and I still had to force the router to reassign new addresses.
> >
> > I never learned what caused this sudden problem. After a few weeks, it
> > disappeared as suddenly as it had appeared and I haven't had the problem
> > since but I read that this problem can appear suddenly, disappear suddenly,
> > and then reappear months, years later so I might have it again sometime.
> > This started the first time after I had my older physical computer shutdown
> > for about 24 hours (usually they are both on 24/7) and when I booted it
> > after being shutdown I saw, almost immediately on the newer XP computer, the
> > notice in the systray about an IP address conflict. I think the router
> > assigned the address the older 98SE computer usually uses to the XP computer
> > because it was available for 24 hours when the older computer was shut down.
> >
> > The conflicts between the virtual machines and either one of the physical
> > machines, or between two virtual machines, were really puzzling and nothing
> > I tried (after Googling the problem) fixed it reliably except the
> > irritating, time consuming method I mentioned above. It did seem though
> > that if I did not use a virtual machine for several days then it would have
> > this conflict when I started it but I don't think not using a virtual
> > machine for days or a week or longer should have anything to do with this
> > because before I had this problem many times I didn't use a virtual machine
> > for days or a week or so and had no ip address conflicts. So, the reason for
> > this sudden problem (and its subsequent sudden disappearance after annoying
> > me for about a month) remain a mystery.
> >
> >
>
> Penguin & Melelina:
>
> If this happens again, check your router for a DHCP client table. My
> router (Linksys) began issuing double IP addresses quite a few times and
> my investigation showed that the DHCP client table had double entries in
> it for the same machine, but different IP address. But also there were
> the same IP addresses for two or more machines.
>
> In my network, I start and shutdown machines at irregular intervals and
> I think this table was getting filled up with bad entries. There was a
> button the table page of the router that said, in effect, "Clear the
> table". When I did that and restarted the router all the operating
> computers were then told to 'ipconfig /renew' and they all got new IP
> addresses - that didn't conflict.
>
> I would have to clear the table and restart everything about once a month.
>
> My final solution to this was to turn off DCHP and assign static
> addresses on my LAN. It's a pain to do so but since I use two of them
> as hosts for gaming having the fixed IP addresses helps in boring a hole
> through the router firewall.
>
> GP
>

> Shared networking seems to work for me. But is my host PC still safe (with
> shared networking) if my guest gets infected (not sharing any files)?

> "penguin" <(email address - cut out)> wrote in message
> news:(email address - cut out)...
>
> > Shared networking seems to work for me. But is my host PC still safe (with
> > shared networking) if my guest gets infected (not sharing any files)?
>
> The thing here, as with 99% of VPC questions, is to consider the virtual
> machine as identical in every way to a physical machine. The software
> installed on it (both OS and applications) doesn't know that it's running on
> a virtual machine - it has no need to know that...
>
> Your guest needs to be protected against malware just as much as every other
> machine (physical or virtual) on your network:
> http://vpc.visualwin.com/ngfaq.aspx#17
>
>
> --
> Mark Rae
> ASP.NET MVP
> http://www.markrae.net
>
>