Created attachment 356911 [details] Backport kernel patches to fix netlink neigh notifications An application running in user space should be able to monitor updates to the kernel's neighbor table (also known as the ARP table for IPv4). This is done by opening a netlink socket for the address family NETLINK_ROUTE and subscribing to the multicast group RTMGRP_NEIGH. In kernel 2.6.18, however, the kernel does not send neighbor updates to this multicast group as it should when a neighbor entry is added or administratively removed. This behavior is fixed in kernel 2.6.24 as the result of two upstream patches: http://git.kernel.org/?p=linux/kernel/git/stable/linux-2.6-stable.git;a=commitdiff;h=b8673311804ca29680dd584bd08352001fcbe2f8 http://git.kernel.org/?p=linux/kernel/git/stable/linux-2.6-stable.git;a=commitdiff;h=d961db358f41033a8fc7b62948bc7cff1b4bb1fe The patches above cannot be applied directly to the 2.6.18 kernel, but I created a working patch for the RHEL 5 kernel that provides the same relevant modifications, which is attached.
This request was evaluated by Red Hat Product Management for inclusion in a Red Hat Enterprise Linux maintenance release. Product Management has requested further review of this request by Red Hat Engineering, for potential inclusion in a Red Hat Enterprise Linux Update release for currently deployed products. This request is not yet committed for inclusion in an Update release.
in kernel-2.6.18-176.el5 You can download this test kernel from http://people.redhat.com/dzickus/el5 Please do NOT transition this bugzilla state to VERIFIED until our QE team has sent specific instructions indicating when to do so. However feel free to provide a comment indicating that this fix has been verified.
An advisory has been issued which should help the problem described in this bug report. This report is therefore being closed with a resolution of ERRATA. For more information on therefore solution and/or where to find the updated files, please follow the link below. You may reopen this bug report if the solution does not work for you. http://rhn.redhat.com/errata/RHSA-2010-0178.html
The needinfo request[s] on this closed bug have been removed as they have been unresolved for 1000 days