Description of problem: This is the same bug at ticket 212399 https://bugzilla.redhat.com/show_bug.cgi?id=212399 I am running two Marvell 88E8001 NICs configured to provide a network bridge. This works fine until the network cables are removed for any reason. When they are put back, the bridge does not function as the interfaces seems to have lost promiscuous mode. Version-Release number of selected component (if applicable): skge v1.1 in RHEL 4.5 How reproducible: Very easily. Steps to Reproduce: 1. Configure eth interface in promiscuous mode 2. Observe traffic 3. Remove network cables and replace Actual results: Interface is not in promiscuous mode any more. Expected results: Bridging and promiscuous mode should survive recabling without a reboot. Additional info:
I can confirm that the Fedora patch with the original ticket ( https://bugzilla.redhat.com/show_bug.cgi?id=212399#c4 ) fixes the problem. The patch applies in three hunks, the last of which fails. It appears that the last hunk is a patch for code which is non-existent in the RHEL 4.5 driver so doesn't seem to be a problem. I guess this needs back porting to RHEL4.
Created attachment 269171 [details] rhel4-test0.patch Without all of the bits included in this patch, you may have problems with promiscuity being incorrectly set during other operations as well. Could you try and use ethtool to set the MTU to something slightly different while capturing frames or doing bridging with your patch and let me know the results? If promiscuity fails to be set correctly (as I suspect it might), this newly attached patch may be required instead.
Hi. From initial testing it seems that any change to MTU when using the patch from the Fedora 5 ticket causes the bridge to stop bridging. A network restart will get it going again. Values lower than 1500 do not work at all: a ping is possible but TCP traffic such as HTTP does not get through. Using your comment #2 patch I can set MTU to >1500 with no interruption in bridging. However I still get the same effect when trying values lower than 1500.
Thanks for the update. Thank you for confirming that the updated patch is better than the original one. I will work to get this included in an upcoming update (hopefully the next one, but I can't promise anything)
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.
My test kernels have been updated to include a patch for this bugzilla. http://people.redhat.com/agospoda/#rhel4 Please test them and report back your results.
Committed in 68.21.EL . RPMS are available at http://people.redhat.com/vgoyal/rhel4/
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-2008-0665.html