IP Conflict

  • Thread starter Thread starter Michelle
  • Start date Start date
M

Michelle

I have a laptop I am trying to put on the network. I gave it an IP of
146.186.143.246 I got an ip conflict and it returned a 0.0.0.0 ip so I then
went in and and found it to be conflicting with MAC 00-10-5A-1F-4A-05 so I
then selected another address and changed the ip to 146.186.143.239 and got
the same error with the same MAC that has the conflict...anyone have any
ideas.
SN is 255.255.255.192 GW 146.186.143.193
 
Michelle said:
I have a laptop I am trying to put on the network. I gave it an IP of
146.186.143.246 I got an ip conflict and it returned a 0.0.0.0 ip so I
then went in and and found it to be conflicting with MAC 00-10-5A-1F-4A-05
so I then selected another address and changed the ip to 146.186.143.239
and got the same error with the same MAC that has the conflict...anyone
have any ideas.
SN is 255.255.255.192 GW 146.186.143.193
Click to expand...

I'm confused by your address scheme. What kind of network set up do you
have? Router? Switch and all machines have public IPs like that?

IPv4 Allowable addresses for private networks:

10.0.0.0/8. The 10.0.0.0/8 private network is a Class A network ID that
supports the following range of valid IP addresses: 10.0.0.1 through
10.255.255.254.

172.16.0.0/12. The 172.16.0.0/12 private network can be interpreted either
as a block of 16 Class B network IDs or as a 20-bit assignable address
space (20 host bits) that can be used for any subnetting scheme within the
private organization. The 172.16.0.0/12 private network supports the
following range of valid IP addresses: 172.16.0.1 through 172.31.255.254.

192.168.0.0/16. The 192.168.0.0/16 private network can be interpreted either
as a block of 256 Class C network IDs or as a 16-bit assignable address
space (16 host bits) that can be used for any subnetting scheme within the
private organization. The 192.168.0.0/16 private network supports the
following range of valid IP addresses: 192.168.0.1 through 192.168.255.254.

Malke
 
It is a network at a Univeristy. We have switches we don't use active
directory (yet) an we do not authenticate when we log on. The users just log
intot he computer but the network connection gives them the ability to get
out to the internet.
 
Michelle said:
It is a network at a Univeristy. We have switches we don't use active
directory (yet) an we do not authenticate when we log on. The users just
log intot he computer but the network connection gives them the ability to
get out to the internet.
Click to expand...

I'm sorry but this isn't enough information and it doesn't really make
sense. Saying "the network connection gives them the ability..." is
nebulous. There has to be some device acting as a DHCP/DNS/possibly proxy
server. Using switches or routers has nothing to do with Active Directory.

You should contact the University's IT Dept. because they will know how
they've set up their network and how to resolve your issue.


Malke
 
The university IT did not set up our network. At this university each
department has their own it dept and they set up their own network. I don't
know exactly how this one is set up as I am just the ITS for the department
not the network admin. However this is not a question as to how the network
is set up I just wanted to know if any knows why if I change an address two
three or even 4 times why it would have a conflict with the exact same MAC
each time.
 
Michelle said:
The university IT did not set up our network. At this university each
department has their own it dept and they set up their own network. I
don't know exactly how this one is set up as I am just the ITS for the
department
not the network admin. However this is not a question as to how the
network is set up I just wanted to know if any knows why if I change an
address two three or even 4 times why it would have a conflict with the
exact same MAC each time.
Click to expand...

Probably because you're using a public IP addressing scheme instead of
private IP addresses the way you should be. Contact the systems
administrator or have an outside professional come in and help you.

Good luck,

Malke
 
It might be that 2 devices on your network actually have identical MAC
addresses. This in not suppose to be possible but I have have seen it. 2
NIC's from the same manufacturer with identcial MAC addresses. Not sure what
you can do if this is the case but worth eliminating as a possibility
 
Thank you I will look into that.

Matth said:
It might be that 2 devices on your network actually have identical MAC
addresses. This in not suppose to be possible but I have have seen it. 2
NIC's from the same manufacturer with identcial MAC addresses. Not sure what
you can do if this is the case but worth eliminating as a possibility
Click to expand...
 
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