Hi,
Something strange with the netlink messages which are sent if
'modprobe -r dummy' is run while the dummy device is UP. The
following commands:
# modprobe dummy0
# ip li set dev dummy0 up
# modprobe -r dummy0
# modprobe dummy0
# ip li set dev dummy0 up
# modprobe -r dummy0
Produce:
ZEBRA: netlink_parse_info: netlink-listen type RTM_NEWLINK(16), seq=0, pid=29001
ZEBRA: netlink_parse_info: netlink-listen type RTM_NEWLINK(16), seq=0, pid=29001
ZEBRA: netlink_parse_info: netlink-listen type RTM_DELLINK(17), seq=0, pid=29001
ZEBRA: interface dummy0 index 86 is now inactive.
ZEBRA: netlink_parse_info: netlink-listen type RTM_NEWLINK(16), seq=0, pid=29001
ZEBRA: interface dummy0 index 86 becomes active.
The NEWLINK for the UP->DOWN flags change is sent /after/ the
DELLINK, which obviously is a problem - we don't know the NEWLINK
refers to a deleted interface. 'ip monitor' does print out the
messages in the right order though:
86: dummy0: <BROADCAST,NOARP> mtu 1500 qdisc noop
link/ether 46:cc:76:33:44:2d brd ff:ff:ff:ff:ff:ff
86: dummy0: <BROADCAST,NOARP,UP> mtu 1500 qdisc noqueue
link/ether 46:cc:76:33:44:2d brd ff:ff:ff:ff:ff:ff
86: dummy0: <BROADCAST,NOARP,UP> mtu 1500 qdisc noqueue
link/ether 46:cc:76:33:44:2d brd ff:ff:ff:ff:ff:ff
86: dummy0: <BROADCAST,NOARP> mtu 1500 qdisc noqueue
link/ether 46:cc:76:33:44:2d brd ff:ff:ff:ff:ff:ff
Deleted 86: dummy0: <BROADCAST,NOARP> mtu 1500 qdisc noop
link/ether 46:cc:76:33:44:2d brd ff:ff:ff:ff:ff:ff
Not sure how it manages this.
I havn't tested yet whether this is specific to the dummy device, or
devices in general. If general, it's a problem - what's the correct
way to tell the NEWLINK is 'stale'? (please don't say by ifindex :) ).
regards,
--
Paul Jakma [EMAIL PROTECTED] [EMAIL PROTECTED] Key ID: 64A2FF6A
Fortune:
The road to ruin is always in good repair, and the travellers pay the
expense of it.
-- Josh Billings
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