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Created attachment 481308 [details] man patch against RHEL6 Description of problem: This is same as BZ671321, but this addresses RHEL6. mss option of route command sets MTU value. Looking in the code the value is passed to inet_ioctl() of kernel, which only accepts setting MTU. I have a patch to address this issue HOWEVER. Since this may affect the change in behavior significantly, I'd like to propose man page change, so users are aware that setting mss would mean setting MTU (although they are actually not the same thing). Version-Release number of selected component (if applicable): net-tools-1.60-102.el6 How reproducible: Always Steps to Reproduce: e.g: 1. # route del default 2. # route add default gw 192.168.122.1 mtu 1500 Above the action shows the below: [root@olive-kvm164 ~]# cat /proc/net/route Iface Destination Gateway Flags RefCnt Use Metric Mask MTU Window IRTT eth0 007AA8C0 00000000 0001 0 0 0 00FFFFFF 0 0 0 eth0 0000FEA9 00000000 0001 0 0 0 0000FFFF 0 0 0 eth0 00000000 017AA8C0 0003 0 0 0 00000000 1500 0 0 Actual results: Man page is not clear that mss sets MTU. Expected results: Should be clear that mss sets MTU. Additional info:
Technical note added. If any revisions are required, please edit the "Technical Notes" field accordingly. All revisions will be proofread by the Engineering Content Services team. New Contents: The route(8) manual page now includes an explicit description of the "mss M" option.
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. http://rhn.redhat.com/errata/RHBA-2011-1596.html