RM500U-EA IPV6 Openwrt 23.05 not getting assigned

For Developers
1

From module using the command 'AT+QIACT=1' im getting the ipv6 address to the module (RM500U-EA) , I'm using NCM mode i.e cdc_ethernet device but in my device ifconfig i cant see the ipv6 address on usb0 . DHCP server is not releasing the ipv6 address to my openwrt23 software which is my device , if any one has a patch kindly share it or share any answers if u have one !

the below is logread from openwrt-23

odhcp6c[12146]: Failed to send RS (Cannot assign requested address)
odhcp6c[12146]: (re)starting transaction on usb0
odhcp6c[12146]: Starting SOLICIT transaction (timeout 4294967295s, max rc 0)
odhcp6c[12146]: Failed to send SOLICIT message to ff02::1:2 (Cannot assign requested address)
odhcp6c[12146]: carrier => 0 event on
odhcp6c[12146]: (re)starting transaction on usb0
odhcp6c[12146]: Starting SOLICIT transaction (timeout 4294967295s, max rc 0)

this is /etc/config/network :

config interface 'cellularv6'
option device 'usb0'
option proto 'dhcpv6'
option enabled '1'
option mtu '1300' # OK for cellular; try 1428 if no MTU issues
option sourcefilter '0' # Keeps multicast open
option reqaddress 'try' # Request address (try: fallback to SLAAC)
option reqprefix 'auto' # Enable PD (auto: request based on RA)
option ipv6 '1' # Explicitly enable IPv6 (default, but force it)

firewall configuration

/etc/config/firewall

config zone
option name 'cellular'
list network 'cellular'
list network 'cellularv6'
option input 'ACCEPT'
option output 'ACCEPT'
option forward 'ACCEPT'
option masq '1'
option masq6 '1'
option mtu_fix '1'

2

Please connect to your OpenWrt device using ssh and copy the output of the following command ubus call system board.

3

hi there im using kernel 5.15.167

4

try answering the question in your next reply.

5

ubus call system board
{
"kernel": "5.15.167",
"hostname": "xxxxxxx",
"system": "xxxxxxxxxxxx",
"model": "xxxx",
"board_name": "xxxxx",
"rootfs_type": "squashfs",
"release": {
"distribution": "OpenWrt",
"version": "23.05.5",
"revision": "r24106-10cc5fcd00",
"target": "xxxxxx",
"description": "OpenWrt 23.05.5 r24106-10cc5fcd00"
}
}

6

you're over redacting, one more time, you're almost there.

7

which field u want ?

8

all of them, but hostname ?

you can however start by upgrading to 24.10.4, since your version's been EOL:ed.

9

no i cant upgrade is there any option in openwrt23 ?

10

if you can't upgrade, then your firmware didn't come from here, ask the people you got it from.

It appears you are using firmware that is not from the official OpenWrt project.

When using forks/offshoots/vendor-specific builds that are "based on OpenWrt", there may be many differences compared to the official versions (hosted by OpenWrt.org). Some of these customizations may fundamentally change the way that OpenWrt works. You might need help from people with specific/specialized knowledge about the firmware you are using, so it is possible that advice you get here may not be useful.

You may find that the best options are:

  1. Install an official version of OpenWrt, if your device is supported (see https://firmware-selector.openwrt.org).
  2. Ask for help from the maintainer(s) or user community of the specific firmware that you are using.
  3. Provide the source code for the firmware so that users on this forum can understand how your firmware works (OpenWrt forum users are volunteers, so somebody might look at the code if they have time and are interested in your issue).

If you believe that this specific issue is common to generic/official OpenWrt and/or the maintainers of your build have indicated as such, please feel free to clarify.

11

thank you , but i know upgrading my firmware to 24 will solve it , i have tried it but i want it in openwrt23 and its showing the release im using is stable in the below link

12

for some reason I still belivie you're using a spin off image.
build, kernel and version matching doesn't matter.
esp since you won't reveal full device info.

13

Please do not do ANY AI explainers or edits, just manually remove lines with passwords and public IPs.

Please connect to your OpenWrt device using ssh and copy the output of the following commands and post it here using the "Preformatted text </> " button (red circle; this works best in the 'Markdown' composer view in the blue oval):

Screenshot 2025-10-20 at 8.14.14 PM

Remember to redact passwords, VPN keys, MAC addresses and any public IP addresses you may have:

ubus call system board
cat /etc/config/network
cat /etc/config/wireless
cat /etc/config/dhcp
cat /etc/config/firewall
14

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