Windows 7 IP conflict

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gmustata
Posts: 1
Joined: Fri Mar 30, 2018 1:01 pm

Windows 7 IP conflict

Post by gmustata » Fri Mar 30, 2018 1:27 pm

Hi!

I have a setup for VPN L2 access to a site and one of my stations (windows 7 install) is reporting IP conflict when connecting to the VPN server. Sniffing traffic using Wirishark will reveal that after a success DHCP discover/offer/req/ack, an arp request is sent from my station :
(00:ac:28:90:3a:e2 Broadcast ARP 42 Who has 10.135.9.220? Tell 0.0.0.0)
and an arp reply is received :
(Vmware_6a:10:97 00:ac:28:90:3a:e2 ARP 60 10.135.9.220 is at 00:50:56:6a:10:97)
after which a DHCP decline is sent :
(0.0.0.0 255.255.255.255 DHCP 342 DHCP Decline)

On the server-side, I can see in the interface with the hw address 00:50:56:6a:10:97 is a SID-LOCALBRIDGE-1 and has a DHCP flag. Reinstalling the Softether VPN client will make the connection work again for a short time.

What am I doing wrong?

thisjun
Posts: 2789
Joined: Mon Feb 24, 2014 11:03 am

Re: Windows 7 IP conflict

Post by thisjun » Fri Apr 27, 2018 3:08 am

What IP does conflict?

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