Cron job udhcpc on WRT54GL

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Couin
DD-WRT Novice


Joined: 11 Sep 2013
Posts: 13
Location: France
PostPosted: Tue Jan 09, 2024 21:54    Post subject: Cron job udhcpc on WRT54GL Reply with quote
Hi and happy new year Smile

My ISP, through the "infrastructure operator", requires DHCP configuration on WAN side of router, event if the IP never change.
But when the DHCP server is down, the connexion fails (the DHCP lease is 5 minutes).

I can set a static IP configuration, but the "infrastructure operator" authenticates the routeur with its MAC address and requires DHCP discover request.

If in Administration, Commands, I run
Code:
udhcpc -q -n -t 5 -T 10 -i vlan1 -s /dev/null -r MY_IP_ADDRESS >/dev/null 2>&1


I get connection up for one DHCP lease.

So I would add a CRON job each 3 minutes :
Code:
*/3 * * * * udhcpc -q -n -t 5 -T 10 -i vlan1 -s /dev/null -r MY_IP_ADDRESS >/dev/null 2>&1


Save and apply, but it does nothing, like if the CRON job was not handled.

Is there something I miss ?

Thanks Smile
Couin
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WRT54GL 1.1 - DD-WRT v24-3.0 b44715
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bushant
DD-WRT Guru


Joined: 18 Nov 2015
Posts: 2038
PostPosted: Tue Jan 09, 2024 22:14    Post subject: Reply with quote
I believe you need to be root

Code:
*/3 * * * * root udhcpc -q -n -t 5 -T 10 -i vlan1 -s /dev/null -r MY_IP_ADDRESS >/dev/null 2>&1


If you are running 44715 that is old and unsupported.

https://download1.dd-wrt.com/dd-wrtv2/downloads/betas/2024/
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dale_gribble39
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Joined: 11 Jun 2022
Posts: 1959
PostPosted: Tue Jan 09, 2024 22:27    Post subject: Reply with quote
https://wiki.dd-wrt.com/wiki/index.php/Linksys_WRT54GL

https://ftp.dd-wrt.com/dd-wrtv2/downloads/betas/2024/01-02-2024-r54682/broadcom/
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Couin
DD-WRT Novice


Joined: 11 Sep 2013
Posts: 13
Location: France
PostPosted: Tue Jan 09, 2024 23:21    Post subject: Reply with quote
dale_gribble39 wrote:
https://ftp.dd-wrt.com/dd-wrtv2/downloads/betas/2024/01-02-2024-r54682/broadcom/
Thanks ! Will it be 100% compatible (not brick the router) with mine (excepted MEGA, I understand I'd not choose it).

What would gives more, this version, in compare with 44715 ?

Because as I would say "if it runs like you need, don't touch !" Smile
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WRT54GL 1.1 - DD-WRT v24-3.0 b44715
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Couin
DD-WRT Novice


Joined: 11 Sep 2013
Posts: 13
Location: France
PostPosted: Tue Jan 09, 2024 23:22    Post subject: Reply with quote
bushant wrote:
I believe you need to be root

Code:
*/3 * * * * root udhcpc -q -n -t 5 -T 10 -i vlan1 -s /dev/null -r MY_IP_ADDRESS >/dev/null 2>&1
Thanks, it looks running now Smile

bushant wrote:
If you are running 44715 that is old and unsupported.
I don't understand, unsupported by ? The router ? In the "Router database" of dd-wrt.com website, the only purpose is this :

router database.jpg
 Description:
 Filesize:  64.96 KB
 Viewed:  401 Time(s)

router database.jpg

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bushant
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Joined: 18 Nov 2015
Posts: 2038
PostPosted: Tue Jan 09, 2024 23:31    Post subject: Reply with quote
The answer is in front of you on that same page!

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Couin
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Joined: 11 Sep 2013
Posts: 13
Location: France
PostPosted: Tue Jan 09, 2024 23:35    Post subject: Reply with quote
Ooops I not scrolled so did not saw Embarassed (Also, the disclaimer before the search input would be better).
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