Hide Forgot
Description of problem: ip rule command allows to remove rule with priority 0, but manpage ip-rule says that it is not possible. Rule 0 is special. It cannot be deleted or overridden. Version-Release number of selected component (if applicable): iproute-3.10.0-21.el7 How reproducible: Always. Steps to Reproduce: # ip rule show 0: from all lookup local 32766: from all lookup main 32767: from all lookup default # ip rule del prio 0 # ip rule show 32766: from all lookup main 32767: from all lookup default Actual results: Rule with prio 0 can be removed. Expected results: Rule with prio 0 cannot be removed or manpage ip-rule has to be changed. Additional info:
This apparently applies to upstream manpage as well.
We're going to talk to upstream and have this fixed in one way or another there first.
I believe it is up to the kernel to decide whether a rule can be removed or not. Maybe it was misdocumented from the begining, maybe there was a change in the kernel. I would personally just remove the line.
Posted upstream as part of a larger documentation patch. http://marc.info/?l=linux-netdev&m=142893422717620&w=2
Hi Pavel, I tested it on rhel6 and there is not possible to remove rule with prio 0. # rpm -q iproute iproute-2.6.32-45.el6.x86_64 # uname -r 2.6.32-504.el6.x86_64 # ip rule del prio 0 RTNETLINK answers: Operation not permitted So there is true that rule with prio 0 is special. I agree that it is a documentation issue.
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. https://rhn.redhat.com/errata/RHBA-2015-2117.html