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Staticly assigned 2008 R2 SP1 server keeps getting Autoconfiguration IPv4 Address assigned

Posted on 2011-05-11
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Last Modified: 2012-06-22
I have 2008 R2 Sp1 vm that I just built and gave it a static IP address in our DMZ.  No matter what IP address I give it I get ip conflict errors to the same MAC address and I get an autoconfiguration IPv4 address.  When I google the mac address it is registered to Cisco but my network engineers dont see that mac address at all on the core switch or DMZ switch.  When I move the VM to the internal network and assign an internal IP it works fine.  The only thing that seems to work is when I updated the OS with all the latest patches and the DMZ IP addresses worked until I tried to change them then I got IP conflicts again. I havrebuilt the VMs, tried removing and reinstalling different VM NICS and have had the network engineers review the port configurations.  Any ideas or help is appreciated
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Question by:chris3174
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Expert Comment

by:nsx106052
ID: 35740837
Maybe try changing the MAC address since it is a VM.  Then see if you still have the same problem.
https://www.vmware.com/support/ws45/doc/network_macaddr_ws.html

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Author Comment

by:chris3174
ID: 35740925
Thanks but i tried something similar already by removing the NIC and adding a new nic
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LVL 81

Expert Comment

by:arnold
ID: 35741758
YOu assigned statically ipv6 or ipv4 or both?
Is this VM in a domain environemet where you may have a GPO that alters this?
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Author Comment

by:chris3174
ID: 35742423
I assigned static IPv4 and disabled ipv6 on both non-domain and domain
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LVL 81

Expert Comment

by:arnold
ID: 35742666
2008 needs IPv6 functionality for some things.Do you have an IPV6 DHCP server in the environment?
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Author Comment

by:chris3174
ID: 35742680
There is no ipv6 dhcp server in the environment
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LVL 81

Expert Comment

by:arnold
ID: 35742703
So when the IPv6 is active, it gets an Fe address? and that is the concern you have/had?
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Author Comment

by:chris3174
ID: 35827037
the prooblem I having is with IPv4 . Static IP address is assigned in the DMZ subnet and IP conflict occurs with MAC address which belongs to the asa but does not have that IP address.  

ARP -a reveals the all mac address point the  mac address of the the firewall port (gateway)

If I assign the IP address in a different subnet (non dmz) then place the server with the correct IP addess in the DMZ  it has network connectivity with no issues or ip conflict until I restart the server or change IPs while in the DMZ
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Expert Comment

by:arnold
ID: 35827083
You may have misconfigured the ASA to hold that DMZ IP.

What is the setting on the DMZ interface? and what is the IP on the system?

Could you post the ASA interface configuration and the IPconfig /all from the server when it is connected to the DMZ??
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Author Comment

by:chris3174
ID: 35861012
The IP of the two vm's in the DMZ are 172.26.200.9 & 172.26.200.10

This what netwroking gave me in regards to the asa interface config

__________________________________________________________________________________
By default the switch uses Proxy Arp to help learn MAC addresses of hosts so it is turned on.
here are the other config setting for the interfaces incase they ask for it. MTU, speed, duplex, etc..

The devices on the DMZ uses the 172.26.200.1 (Firewall interface) as it's GW.


Interface setting for the ports that the servers connect to, on the DMZ

FastEthernet0/6 is up, line protocol is up (connected)
  Hardware is Fast Ethernet, address is 0023.05c4.a988 (bia 0023.05c4.a988)
  Description: TMG Virtual server connection CR 2836
  MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation ARPA, loopback not set
  Keepalive set (10 sec)
  Full-duplex, 100Mb/s, media type is 10/100BaseTX
  input flow-control is off, output flow-control is unsupported
  ARP type: ARPA, ARP Timeout 04:00:00
  Last input never, output 00:00:00, output hang never
  Last clearing of "show interface" counters never
  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
  Queueing strategy: fifo
  Output queue: 0/40 (size/max)
  5 minute input rate 0 bits/sec, 0 packets/sec
  5 minute output rate 12000 bits/sec, 2 packets/sec
     3975 packets input, 879103 bytes, 0 no buffer
     Received 2104 broadcasts (0 multicasts)
     0 runts, 0 giants, 0 throttles
     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
     0 watchdog, 254 multicast, 0 pause input
     0 input packets with dribble condition detected
     2492832 packets output, 516678209 bytes, 0 underruns
     0 output errors, 0 collisions, 1 interface resets
     0 babbles, 0 late collision, 0 deferred
     0 lost carrier, 0 no carrier, 0 PAUSE output
     0 output buffer failures, 0 output buffers swapped out

FastEthernet0/7 is up, line protocol is up (connected)
  Hardware is Fast Ethernet, address is 0023.05c4.a989 (bia 0023.05c4.a989)
  Description: TMG Virtual server connection CR 2836
  MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation ARPA, loopback not set
  Keepalive set (10 sec)
  Full-duplex, 100Mb/s, media type is 10/100BaseTX
  input flow-control is off, output flow-control is unsupported
  ARP type: ARPA, ARP Timeout 04:00:00
  Last input never, output 00:00:01, output hang never
  Last clearing of "show interface" counters never
  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
  Queueing strategy: fifo
  Output queue: 0/40 (size/max)
  5 minute input rate 12000 bits/sec, 1 packets/sec
  5 minute output rate 0 bits/sec, 0 packets/sec
     559968 packets input, 403013029 bytes, 0 no buffer
     Received 224427 broadcasts (0 multicasts)
     0 runts, 0 giants, 0 throttles
     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
     0 watchdog, 186682 multicast, 0 pause input
     0 input packets with dribble condition detected
     2745165 packets output, 690557124 bytes, 0 underruns
     0 output errors, 0 collisions, 1 interface resets
     0 babbles, 0 late collision, 0 deferred
     0 lost carrier, 0 no carrier, 0 PAUSE output
     0 output buffer failures, 0 output buffers swapped out

FastEthernet0/8 is up, line protocol is up (connected)
  Hardware is Fast Ethernet, address is 0023.05c4.a98a (bia 0023.05c4.a98a)
  Description: TMG Virtual server connection CR 2836
  MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation ARPA, loopback not set
  Keepalive set (10 sec)
  Full-duplex, 100Mb/s, media type is 10/100BaseTX
  input flow-control is off, output flow-control is unsupported
  ARP type: ARPA, ARP Timeout 04:00:00
  Last input never, output 00:00:00, output hang never
  Last clearing of "show interface" counters never
  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
  Queueing strategy: fifo
  Output queue: 0/40 (size/max)
  5 minute input rate 0 bits/sec, 0 packets/sec
  5 minute output rate 12000 bits/sec, 1 packets/sec
     418 packets input, 31884 bytes, 0 no buffer
     Received 413 broadcasts (0 multicasts)
     0 runts, 0 giants, 0 throttles
     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
     0 watchdog, 4 multicast, 0 pause input
     0 input packets with dribble condition detected
     2492756 packets output, 516648278 bytes, 0 underruns
     0 output errors, 0 collisions, 1 interface resets
     0 babbles, 0 late collision, 0 deferred
     0 lost carrier, 0 no carrier, 0 PAUSE output
     0 output buffer failures, 0 output buffers swapped out

FastEthernet0/9 is up, line protocol is up (connected)
  Hardware is Fast Ethernet, address is 0023.05c4.a98b (bia 0023.05c4.a98b)
  Description: TMG Virtual server connection CR 2836
  MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation ARPA, loopback not set
  Keepalive set (10 sec)
  Full-duplex, 100Mb/s, media type is 10/100BaseTX
  input flow-control is off, output flow-control is unsupported
  ARP type: ARPA, ARP Timeout 04:00:00
  Last input never, output 00:00:01, output hang never
  Last clearing of "show interface" counters never
  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
  Queueing strategy: fifo
  Output queue: 0/40 (size/max)
  5 minute input rate 0 bits/sec, 0 packets/sec
  5 minute output rate 12000 bits/sec, 1 packets/sec
     3084019 packets input, 1714849765 bytes, 0 no buffer
     Received 58507 broadcasts (0 multicasts)
     0 runts, 0 giants, 0 throttles
     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
     0 watchdog, 21319 multicast, 0 pause input
     0 input packets with dribble condition detected
     6319294 packets output, 4468211239 bytes, 0 underruns
     0 output errors, 0 collisions, 1 interface resets
     0 babbles, 0 late collision, 0 deferred
     0 lost carrier, 0 no carrier, 0 PAUSE output
     0 output buffer failures, 0 output buffers swapped out


VLAN interface and Interface that connect the DMZ switch to the ASA firewall

Vlan100 is up, line protocol is up
  Hardware is EtherSVI, address is 0023.05c4.a9c1 (bia 0023.05c4.a9c1)
  Internet address is 172.26.200.2/24
  MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec,
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation ARPA, loopback not set
  ARP type: ARPA, ARP Timeout 04:00:00
  Last input 00:00:00, output 00:00:00, output hang never
  Last clearing of "show interface" counters never
  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
  Queueing strategy: fifo
  Output queue: 0/40 (size/max)
  5 minute input rate 2000 bits/sec, 3 packets/sec
  5 minute output rate 6000 bits/sec, 2 packets/sec
     1305269 packets input, 146955240 bytes, 0 no buffer
     Received 0 broadcasts (0 IP multicasts)
     0 runts, 0 giants, 0 throttles
     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
     213114 packets output, 16836540 bytes, 0 underruns
     0 output errors, 0 interface resets
     0 output buffer failures, 0 output buffers swapped out

FastEthernet0/2 is up, line protocol is up (connected)
  Hardware is Fast Ethernet, address is 0023.05c4.a984 (bia 0023.05c4.a984)
  MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation ARPA, loopback not set
  Keepalive set (10 sec)
  Full-duplex, 100Mb/s, media type is 10/100BaseTX
  input flow-control is off, output flow-control is unsupported
  ARP type: ARPA, ARP Timeout 04:00:00
  Last input never, output 00:00:01, output hang never
  Last clearing of "show interface" counters never
  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
  Queueing strategy: fifo
  Output queue: 0/40 (size/max)
  5 minute input rate 3000 bits/sec, 3 packets/sec
  5 minute output rate 15000 bits/sec, 4 packets/sec
     1282440434 packets input, 164556973707 bytes, 0 no buffer
     Received 397168 broadcasts (0 multicasts)
     0 runts, 0 giants, 0 throttles
     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
     0 watchdog, 4859 multicast, 0 pause input
     0 input packets with dribble condition detected
     2239185634 packets output, 1785510099473 bytes, 0 underruns
     0 output errors, 0 collisions, 1 interface resets
     0 babbles, 0 late collision, 0 deferred
     0 lost carrier, 0 no carrier, 0 PAUSE output
     0 output buffer failures, 0 output buffers swapped out

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LVL 81

Expert Comment

by:arnold
ID: 35861310
The server on which the VMs are, does it have multiple network interfaces? or is it connected into the DMZ LAN?
What are the MAC addresses of the other systems that are being reported in the event log with which your systems conflict?  Are you able to locate the switch/port and the underlying system?
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Author Comment

by:chris3174
ID: 35862255
They are on single nic on the dmz. The mac address ( 00-18-19-00-4a-25) belongs to port connected to the asa of the cisco
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LVL 81

Expert Comment

by:arnold
ID: 35862483
IS that the MAC address that is being reported as IP conflict?

Using a single NIC for VM, you only have those IPs assigned within the VM, you do not have the Host NIC configured with these IPs as well, correct?
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Accepted Solution

by:
chris3174 earned 0 total points
ID: 35882098
It looks like removing proxy arp from the asa fixed my issue
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Author Closing Comment

by:chris3174
ID: 35910034
Removing proxy arp from the configuration and subsequent reboot resolved the issue.
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