Dhcp discover message not reply

Installing and Using OpenWrt Network and Wireless Configuration
1

this is dicover message

D185267F-5058-4d76-83E3-D3D7E2A1C710
D185267F-5058-4d76-83E3-D3D7E2A1C710951×1071 48.2 KB

2

this is tcpdump result

8D4060F7-FFC2-4d74-86A9-4E3E7D24A005
8D4060F7-FFC2-4d74-86A9-4E3E7D24A005881×289 23.6 KB

3

Is this OpenWrt related (as no information is provided and it appears you're showing the client's packets)?

Shouldn't this be a REQUEST?

Nonetheless, you provide no information that would be needed to assist you, e.g.:

  • OpenWrt version
  • Device
  • Is this wired or WiFi
  • DHCP config for the interface
  • Firewall config for the interface/zone

(Please use full sentences to describe.)

4

the option 57 is 576. may it is too short?

5

Try answering the questions asked, instead of making counter questions.

2 Likes
6

openwrt version: 19.07

wired

dhcp config :
Dingtalk_20220705152559

1 Like
7

Duplicate: Dhcp ipv4 no reply

Duplicate: How to change DHCP option57(maximum DHCP Message Size))

Please stop creating mutiple threads.

8

Wan?

Your ISP?

Do they lock your MAC address to a specific hardware?

Relevant:

(This is why you use 1 thread for 1 issue. It took 8 posts to reestablish issue on OpenWrt wan.)

9

my wan is dhcp client, and it is connected to a router. I can't login in this router，So I can't tell if my mac address is locked.

10

Ask the owner of the router. There could be many reasons - all under the control of your upstream router's administrator.

Also relevant:

11

sorry, i will pay attention next time

12

ok, i i will do it right now. thanks

1 Like