Date: Thu, 13 Jun 2013 18:38:14 GMT From: Allen <allen@edataquest.com> To: freebsd-gnats-submit@FreeBSD.org Subject: misc/179540: dhclient does not apply changes to lease if IP unchanged Message-ID: <201306131838.r5DIcEg8020523@oldred.freebsd.org> Resent-Message-ID: <201306131840.r5DIe0jp062958@freefall.freebsd.org>
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>Number: 179540 >Category: misc >Synopsis: dhclient does not apply changes to lease if IP unchanged >Confidential: no >Severity: non-critical >Priority: low >Responsible: freebsd-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Thu Jun 13 18:40:00 UTC 2013 >Closed-Date: >Last-Modified: >Originator: Allen >Release: 8.2 >Organization: >Environment: FreeBSD mail.localdomain 8.2-STABLE FreeBSD 8.2-STABLE #0: Fri Oct 14 00:11:10 UTC 2011 root@freebsd-82-64.master.concord.internal:/usr/obj/usr/src/sys/GENERIC amd64 >Description: Upon lease renewal, if the IP address of the lease has not changed, other lease options that have changed are apparently ignored. Only tested with a changing subnet mask but suspect other fields behave similarly. A pfSense DHCP server serving multiple clients exhibited this behavior when the IP address of the pfSense LAN (and thus the DHCP pool) was changed from 192.168.28.1/22 to 192.168.28.1/20. The new netmask (0xfffff000 / 255.255.240.0) is present in the client lease file, but ifconfig shows the old netmask (0xfffffc00 / 255.255.252.0) is still configured on the interface. >How-To-Repeat: 1. Create a subnet with dhcp, e.g. 10.0.0.0/24 with 10.0.0.(200-250) as the dhcp pool. 2. Acquire a lease from this pool on a FreeBSD DHCP client. 3. Change the netmask of the DHCP server and pool to something wider, e.g. 10.0.0.0/22. 4. Await DHCP renewal on client. The lease file will reflect the new subnet mask, but the new mask is not applied to the interface. >Fix: >Release-Note: >Audit-Trail: >Unformatted:
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