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| author | Robin H. Johnson <robbat2@gentoo.org> | 2012-03-02 19:51:09 +0000 |
|---|---|---|
| committer | Robin H. Johnson <robbat2@gentoo.org> | 2012-03-02 19:51:09 +0000 |
| commit | 0dc9431bdb989231cfa20560d69aebebd487a926 (patch) | |
| tree | e50e46bd0e88f74fd03e586f23307afc7b4b25ae | |
| parent | 0fa164dff25969dd56a868446e0644396b2587dc (diff) | |
| download | openrc-0dc9431bdb989231cfa20560d69aebebd487a926.tar.gz openrc-0dc9431bdb989231cfa20560d69aebebd487a926.tar.bz2 openrc-0dc9431bdb989231cfa20560d69aebebd487a926.tar.xz | |
Add a potential future problem I can see with metric calculation and interfaces that change often.
Signed-off-by: Robin H. Johnson <robbat2@gentoo.org>
| -rw-r--r-- | TODO | 14 |
1 files changed, 14 insertions, 0 deletions
@@ -5,3 +5,17 @@ - oldnet[bridging]: Review setting of bridge configuration on dynamic interface add - Document rc-depend binary. + +- _ifindex is not a reliable means of calculating metrics: + _ifindex is used for calculating metrics for new devices but has a major + problem: Since it's only the nth entry in /proc/net/dev + And devices may be removed from that file, and reordered, you won't always + get the same result. + If you do: + - add eth0 - _ifindex (eth0=0) + - add vlan1 - _ifindex (eth0=0,vlan1=1) + - add vlan2 - _ifindex (eth0=0,vlan1=1,vlan2=2) + - rem vlan1 - _ifindex (eth0=0,vlan2=1) + - add vlan3 - _ifindex (eth0=0,vlan2=1,vlan3=2) + Now your routing table has entries for both vlan2 and vlan3 with a metric of 2. + |