Not getting DHCP lease from Netgear LB1120 LTE Modem Bridged
-
@mrn can you show a screenshot of your modem interface WAN page?
Assuming you are absolutely not getting an IP? Not just a connectivity problem?
-
Also.. look up the MTU for the carrier you are using.. Verizon is 1400. Wont affect the DHCP but will affect traffic.
-
Here's my pfsense interface:
Here's my LTE modem configuration (I didn't see any other sections of importance):
As you can see from the following image, my laptop got the bridged IP address correctly. Oddly enough, I didn't have to reboot the LTE modem to get this IP.... I wonder if it's permanently tied to my laptop MAC address even through reboots? That doesn't seem right.
-
It's not the cable either. I just used the same cable for the router and laptop.
-
@mrn that’s a weird one. I would look into that system logs to see what’s going on (dhclient) with DHCP.
-
@michmoor I already did that in my first post, unless you mean some other place.
-
@mrn yes i see that i apologize.
This doesnt seem like a pfsense related issue.
DHCP is 4 message types
Discover
Offer
Request
AcknowledgementpfSense is sending out a broadcast looking for a dhcp server. The dhcp server (cable modem) will hear that broadcast and respond with an offer (public IP from the pool).
From your system log messages (assuming no filtering of the log messages), pfsense is looking for the dhcp server and its not responding.
As mentioned it could be a sticky mac address issue where the first record mac learned on the cable modem port is what will get the IP address and subsequent macs get nothing. If so and if rebooting the modem doesnt clear the mac then i would contact the service provider.edit: Why are you hard coding a mac address in the pfsense WAN DHCP settings?
-
The reason I hardcoded it is that I have an high availability setup. Right now the LTE modem is connected to my secondary pfsense, but I want to me able to move the connection to the primary if necessary. I know that having the same MAC address can make it a seamless transition.
-
It won't pull an neither on bridged NOR on router mode.
-
@mrn And yes, I have updated it to the latest firmware version.
-
@mrn in Router mode i suspect the cable modem is giving out a DHCP address in the RFC1918 space which based on your screenshot, pfsense will ignore. Uncheck that option and test again.
-
@michmoor Believe it or not, it STILL doesn't pull a DHCP lease.
I'm about to return this thing and try something else.
-
@mrn uncheck the two boxes for the reserved addresses on your WAN page.
-
@mrn
This is how mine is set up.
-
My modem is haunted. Which model do you use?
I rebooted the modem, I rebooted pfsense. It just does not work!!
-
@mrn
Desperation.
Try another port other than igb3 -
@mrn said in Not getting DHCP lease from Netgear LB1120 LTE Modem Bridged:
My modem is haunted. Which model do you use?
I also use the Netgear LB1120
-
@mrn Quit trying to spoof the MAC address.. Not sure why you would need it.
-
-
@mrn
nice..
dont know whats going on with igb3 in that case but glad its all sorted.
