Static IP address not pingable on Juniper network

Hi all

I recently encountered an issue when configuring a LAN.
I am using a juniper J2320 router and Juniper EX3200 switch.

The J-series router acts as my DHCP server and the EX-series is my LAN access switch.

Hosts on the LAN are acquiring an IP address dynamically from the DHCP server without any issue and are pingable and reachable.

However, if i assign a static IP within the same LAN range to a host on the LAN, i can't ping it and the host is not reachable.

Has anyone encountered this? Any solution/recommendations are welcome.

I'm not a juniper expert but is there a chance that DHCP already assigned that IP address somewhere?


What is your address range and what is your DHCP range? Does your static address fall into the DHCP range?

Check with : show dhcp server binding detail


www.juniper.net/techpubs/en_US/junos9.4/...binding-command.html

Hi Nevins
Thanks for your reply.
The post really helped.

DHCP has not assigned that IP address on another device. I used the command below to check

show dhcp server binding
5 clients, (0 bound, 0 selecting, 0 renewing, 5 rebinding)

IP address Hardware address Type Lease expires at
10.20.32.31 90:00:00:01:00:01 active 2009-01-17 11:38:47 PST
10.20.32.33 90:00:00:02:00:01 active 2009-01-17 11:38:41 PST
10.20.32.34 90:00:00:03:00:01 active 2009-01-17 11:38:01 PST
10.20.32.35 90:00:00:04:00:01 active 2009-01-17 11:38:07 PST
10.20.32.46 90:00:00:05:00:01 active 2009-01-17 11:38:47 PST
And YES the static address falls into the DHCP range.
I dont know if its the firewall services within the JUNOS that is blocking this.

As a work-around, i forced the host to acquire the IP i want dynamically by using the commands below.
However, i am still looking at a final solution. Why can't i use static IPs?

show configuration system services dhcp
>> > static-binding 00:40:01:27:e2:87
>> > fixed-address {
>> > 10.20.32.36;
>> > }
>> > router {
>> > 10.20.32.254;

Try reducing the size of your DHCP pool and then assign an address that isn't a pool.


kb.juniper.net/InfoCenter/index?page=content&id=KB15754


Also try : show system services dhcp conflict

www.juniper.net/techpubs/en_US/junos10.4...s-dhcp-conflict.html