6 Jun
2016
6 Jun
'16
12:40 p.m.
Has anyone else noted problems with the ethernet alias
functionality in
recent Linux kernels ? I've just done an update on my tunnel server
(pogoplug E02 running Debian 8 with kernel 4.4.0-kirkwood) and within a
day or so the 44net alias disappears. Nothing I can see in any of the
logs. Replacing the alias via 'ip addr add 44.135.190.17/32 dev eth0:1'
is enough to fix it, might have to hack into a cron job :-/R
Why are you still using ethernet aliases? This was originally a hack to
be able to have multiple IP addresses on a single interface (using ifconfig)
but since the introduction of the iproute2 package (which you apparently use,
as it provides the "ip" command) this is really not required anymore.
You can add addresses to eth0 without making an eth0:1 alias first.
Rob
6 Jun
6 Jun
12:53 p.m.
New subject: disappearing ip alias ?
On 2016-06-06 09:40 AM, Rob Janssen wrote:
(Please trim inclusions from previous messages)
_______________________________________________
Probably just a (bad) habit ... given it worked originally there didn't
seem a reason to change. I found an alternative syntax:
ip addr add 44.135.190.17/32 dev eth0 label eth0:1
we'll see if that sticks any better.
... Niall
Has anyone else noted problems with the ethernet
alias functionality in
recent Linux kernels ? I've just done an update on my tunnel server
(pogoplug E02 running Debian 8 with kernel 4.4.0-kirkwood) and within a
day or so the 44net alias disappears. Nothing I can see in any of the
logs. Replacing the alias via 'ip addr add 44.135.190.17/32 dev eth0:1'
is enough to fix it, might have to hack into a cron job :-/R
Why are you still using ethernet aliases? This was originally a hack to
be able to have multiple IP addresses on a single interface (using
ifconfig)
but since the introduction of the iproute2 package (which you apparently
use,
as it provides the "ip" command) this is really not required anymore.
You can add addresses to eth0 without making an eth0:1 alias first. 
1:43 p.m.
New subject: disappearing ip alias ?
Hello Niall,
I also use IP aliased interfaces from time to time. Unless that feature
is going to be officially deprecated for a newer method, this
could/should be a proper bug. When the interface goes away, I wonder if
you're having a link flap on your physical interface. I've never used a
Pogoplug but I would start there and any issues there SHOULD be logged
in /var/log/messages or syslog
--David
KI6ZHD
On 06/06/2016 09:53 AM, Niall Parker wrote:
(Please trim inclusions from previous messages)
> _______________________________________________
>> Has anyone else noted problems with the ethernet alias functionality in
>> recent Linux kernels ? I've just done an update on my tunnel server
>> (pogoplug E02 running Debian 8 with kernel 4.4.0-kirkwood) and
>> within a
>> day or so the 44net alias disappears. Nothing I can see in any of the
>> logs. Replacing the alias via 'ip addr add 44.135.190.17/32 dev eth0:1'
>> is enough to fix it, might have to hack into a cron job :-/R
17 Jun
17 Jun
7:57 p.m.
New subject: disappearing ip alias ?
On 2016-06-06 10:43 AM, David Ranch wrote:
(Please trim inclusions from previous messages)
_______________________________________________
Hello Niall,
I also use IP aliased interfaces from time to time. Unless that feature
is going to be officially deprecated for a newer method, this
could/should be a proper bug. When the interface goes away, I wonder if
you're having a link flap on your physical interface. I've never used a
Pogoplug but I would start there and any issues there SHOULD be logged
in /var/log/messages or syslog
Just a followup for anyone watching, after running using
ip addr add <IP> dev eth0 label eth0:1
it has been solid for 10 days or so ... appears that while
ip addr add <IP> dev eth0:1
works for a little while it is not correct and will eventually fail. It
may be the avahi daemon getting confused about what interfaces are local
? ... not too important if the 'label' syntax above works.
... Niall
--David
KI6ZHD
On 06/06/2016 09:53 AM, Niall Parker wrote:
(Please trim inclusions from previous messages)
> _______________________________________________
>> Has anyone else noted problems with the ethernet alias functionality in
>> recent Linux kernels ? I've just done an update on my tunnel server
>> (pogoplug E02 running Debian 8 with kernel 4.4.0-kirkwood) and
>> within a
>> day or so the 44net alias disappears. Nothing I can see in any of the
>> logs. Replacing the alias via 'ip addr add 44.135.190.17/32 dev eth0:1'
>> is enough to fix it, might have to hack into a cron job :-/R
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3 comments
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David Ranch -
Niall Parker -
Rob Janssen