WAN udhcpc broadcasting but not receiving a response

[zoobiedoobie]

I had a working installation at one point, but Spectrum had an outage and the router never recovered. Spectrum support indicates my router should just "work" if I plug it in.

This is what happens when I plug the WAN port in.

> logread -f
Fri Oct 20 05:23:10 2023 daemon.notice netifd: Network device 'wan' link is up
Fri Oct 20 05:23:10 2023 daemon.notice netifd: Interface 'WAN' has link connectivity
Fri Oct 20 05:23:10 2023 daemon.notice netifd: Interface 'WAN' is setting up now
Fri Oct 20 05:23:10 2023 daemon.notice netifd: WAN (3309): udhcpc: started, v1.35.0
Fri Oct 20 05:23:10 2023 daemon.notice netifd: WAN (3309): udhcpc: broadcasting discover
Fri Oct 20 05:23:13 2023 daemon.notice netifd: WAN (3309): udhcpc: broadcasting discover
Fri Oct 20 05:23:16 2023 daemon.notice netifd: WAN (3309): udhcpc: broadcasting discover

Modem Details:

• internet connectivity works with the spectrum router.
• Model E31T2V1
• ethernet port blinks steady and constant in both cases.

/etc/config/network

config interface 'loopback'
	option device 'lo'
	option proto 'static'
	option ipaddr '127.0.0.1'
	option netmask '255.0.0.0'

config globals 'globals'
	option ula_prefix 'fdcc:725d:0aa3::/48'

config device
	option name 'br-lan'
	option type 'bridge'
	list ports 'lan1'
	list ports 'lan2'
	list ports 'lan3'
	list ports 'lan4'

config interface 'lan'
	option device 'br-lan'
	option proto 'static'
	option ipaddr '192.168.1.1'
	option netmask '255.255.255.0'
	option ip6assign '60'

config device
	option name 'wan'

config device
	option name 'eth0'

config interface 'WAN'
	option proto 'dhcp'
	option device 'wan'
	option broadcast '1'

Potentially Related (shots in the dark):

• Fixes for udhcpc DHCP renewal bugs in Busybox 1.30 used in 19.07
• (Not Related, but useful debugging) [SOLVED] DHCP lease on WAN interface - #3 by sirizha
• Wiki Article on how to troubleshoot DHCP https://openwrt.org/docs/guide-user/network/protocol.dhcp#troubleshooting unfortunately I don't have internet connectivity so I likely won't be able to install tcpdump.

[dave14305]

What’s the state of the modem?

[zoobiedoobie]

Modem details

@zoobiedoobie

Modem Details:

• from spectrum
• internet connectivity works with the spectrum router.
• Model E31T2V1
• ethernet port blinks steady and constant in both cases.

[trendy]

What happens if you connect your PC/laptop on the ISP router instead of OpenWrt? Does it get an IP?

[zoobiedoobie]

I'm out of luck on that one as I don't have a machine with an ethernet port that's close enough for this.

I would assume it would though because the spectrum router works?

[trendy]

@zoobiedoobie

I would assume it would though because the spectrum router works?

That's not a good assumption.

[zoobiedoobie]

@trendy

That's not a good assumption.

now I'm intrigued.... tell me more hahaha

[trendy]

If some other device gets an IP from the ISP router, then something is wrong with the OpenWrt. If some other device doesn't get an IP from the ISP router, then the ISP router has the problem.

[zoobiedoobie]

OK, let's assume I plug in another device and it does get an IP therefore showing a problem in the OpenWRT setup. What can I do?

[trendy]

Reset to defaults.

[mk24]

Cable companies often lock to the router's MAC and refuse to serve a new router right away. Unplug the cable modem and leave it off for 30 minutes then start it up and try again with the OpenWrt router only.