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Tasklist

FS#19763 - [dhcpd] Losing DHCP assignment from modem when DHCPD sets MTU

Attached to Project: Arch Linux
Opened by FuKaS (FuKaS) - Thursday, 10 June 2010, 22:31 GMT
Last edited by Allan McRae (Allan) - Saturday, 28 April 2012, 11:51 GMT
Task Type Bug Report
Category Packages: Core
Status Closed
Assigned To Ronald van Haren (pressh)
Architecture All
Severity Medium
Priority Normal
Reported Version
Due in Version Undecided
Due Date Undecided
Percent Complete 100%
Votes 0
Private No

Details

Description:
When the network daemon is started and your device (cable modem in this scenario) assigns your interface an ip address, DHCPD re-sets the MTU causing the interface to lose it's acquired information.

The current (updated) DHCPD config has one change which has seemingly started the issue, the change is that the "interface_mtu" option has been uncommented.


Additional info:
* package version(s)
* config and/or log files etc.


Steps to reproduce:

To reproduce this problem, open /etc/dhcpcd.conf and uncomment "option interface_mtu"
followed by restarting the network daemon (/etc/rc.d/network restart).

Issuing ifconfig you will notice your interface has no IP address, also if you instruct dhcpcd to run on your interface (dhcpcd eth0) it will tell you it's already running. Killing DHCPCD and reissuing the command still results in no IP address.
This task depends upon

Closed by  Allan McRae (Allan)
Saturday, 28 April 2012, 11:51 GMT
Reason for closing:  No response
Comment by Gaetan Bisson (vesath) - Saturday, 19 February 2011, 13:36 GMT
So this is just a matter of default configuration, right? Have you tried reporting this upstream?

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