[j-nsp] EX4200 arp-inspection and examine-dhcp questions

Clarke Morledge chmorl at wm.edu
Fri Apr 9 14:24:23 EDT 2010


On Thu, Apr 1, 2010 at 9:29 AM, Kessler, Ben <ben.kessler at zenetra.com> wrote:
> Hi Gang -
> We're implementing some EX4200s for a customer. ?A problem that we're having
> though is that devices configured with static IP addresses are not able to
> communicate on the network (DHCP hosts are fine).
> We believe that we've tracked this down to the arp-inspection and
> examine-dhcp options that are added by default when various port profiles
> are selected in the WebUI.
> I was wondering what others are doing to work-around this behavior. ?We're
> running 9.5R4.3 on the switches (code version that was recommended by our
> Juniper SE)
> Thanks,
> Ben


Ben,

My understanding is that you will need to configure static IP addresses 
for DHCP bindings on the access ports:

http://www.juniper.net/techpubs/en_US/junos9.6/topics/task/configuration/port-security-static-ip-address-cli.html

I haven't tested it myself, so I would be very curious to know what type 
of mileage you get on this.

Clarke Morledge
College of William and Mary
Information Technology - Network Engineering
Jones Hall (Room 18)
Williamsburg VA 23187


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