[SFS] Ubuntu server with 2 IP addresses
Zack Coffey
clickwir@gmail.com
Wed, 11 Oct 2017 14:58:55 -0600
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Looks like someone with a Raspberry Pi had a similar sounding issue.
https://raspberrypi.stackexchange.com/questions/13359/where-does-my-secondary-ip-come-from
Here's the solution they posted:
# The issue was caused by a separate dhcp@network laying in
/etc/systemd/system/
# No clue where it came from, but deleting it solved my problem :)
On Wed, Oct 11, 2017 at 2:32 PM, Corey <skiabq@gmail.com> wrote:
> Hi Mr. Willson -
>
> Yes, it is persistant thru a reboot.
>
> Ip address delete removes both of them (even if I just specify the
> dynamic IP), but a reboot restores them both.
>
> I have joined MatterMost as "n3rDy".
>
> Thanks
>
> Corey
>
> On 10/11/17, David L. Willson <DLWillson@thegeek.nu> wrote:
> > Does it persist through a reboot?
> >
> > Does the undesired address come off, and stay off (for a long time), if
> you
> > 'ip address delete (it)'?
> >
> > It seems like this might take a few rounds of Q & T & A ... Maybe you
> should
> > come hang out with us in MatterMost:
> > https://mattermost.sofree.us/signup_user_complete/?id=
> brmczfxbrjr15ggn7rwtpwgthy
> >
> > --
> > David L. Willson
> > Teacher, Engineer, Evangelist
> > COA LFCS CCAH RHCE CLP
> > Mobile 720-333-LANS(5267)
> > http://sofree.us
> >
> > This is a good time for a r3VOLution.
> >
> > ----- Original Message -----
> >> Hopefully this message will get to everybody, I think I sent it to
> >> the
> >> right address . . . if not would somebody forward it to the brain
> >> trust for me?
> >>
> >> Thanks in advance for any advice and or sarcasm offered ;-)
> >>
> >> I have an issue with an Ubuntu server that I just upgraded from 14.04
> >> to 16.04 using the do-release-upgrade command. I know it is not
> >> ideal,
> >> but this was preferred over a clean install. Everything seemed to go
> >> well, but now eth0 has 2 IP addresses, 1 dynamic (I don't need or
> >> want) and 1 static, which is the actual one that I want. They are
> >> both
> >> working fine and I can SSH to the server on either address. How can I
> >> turn off the 1 dynamic address?
> >>
> >> Here is my interfaces file:
> >>
> >> # The loopback network interface
> >> auto lo
> >> iface lo inet loopback
> >>
> >> # The primary network interface
> >> auto eth0
> >> iface eth0 inet static
> >> address 10.0.1.211
> >> netmask 255.255.255.0
> >> network 10.0.1.0
> >> broadcast 10.0.1.255
> >> gateway 10.0.1.254
> >> dns-nameservers 10.0.1.2 10.0.1.22
> >>
> >> Here is the result of "ip a", notice it shows both addresses, but
> >> "ifconfig" that follows it only shows the dynamic one:
> >>
> >> srv:~$ ip a
> >> 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN
> >> group default
> >> link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
> >> inet 127.0.0.1/8 scope host lo
> >> valid_lft forever preferred_lft forever
> >> inet6 ::1/128 scope host
> >> valid_lft forever preferred_lft forever
> >> 2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP
> >> group default qlen 1000
> >> link/ether 00:50:56:85:7a:60 brd ff:ff:ff:ff:ff:ff
> >> inet 10.0.1.64/24 brd 10.0.1.255 scope global dynamic eth0
> >> valid_lft 258240sec preferred_lft 258240sec
> >> inet 10.0.1.211/24 brd 10.0.1.255 scope global secondary eth0
> >> valid_lft forever preferred_lft forever
> >> inet6 fe80::250:56ff:fe85:7a60/64 scope link
> >> valid_lft forever preferred_lft forever
> >>
> >>
> >> srv:~$ ifconfig
> >> eth0 Link encap:Ethernet HWaddr 00:50:56:85:7a:60
> >> inet addr:10.0.1.64 Bcast:10.0.1.255 Mask:255.255.255.0
> >> inet6 addr: fe80::250:56ff:fe85:7a60/64 Scope:Link
> >> UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
> >> RX packets:4454 errors:0 dropped:0 overruns:0 frame:0
> >> TX packets:348 errors:0 dropped:0 overruns:0 carrier:0
> >> collisions:0 txqueuelen:1000
> >> RX bytes:415570 (415.5 KB) TX bytes:63700 (63.7 KB)
> >>
> >> lo Link encap:Local Loopback
> >> inet addr:127.0.0.1 Mask:255.0.0.0
> >> inet6 addr: ::1/128 Scope:Host
> >> UP LOOPBACK RUNNING MTU:65536 Metric:1
> >> RX packets:333 errors:0 dropped:0 overruns:0 frame:0
> >> TX packets:333 errors:0 dropped:0 overruns:0 carrier:0
> >> collisions:0 txqueuelen:0
> >> RX bytes:55712 (55.7 KB) TX bytes:55712 (55.7 KB)
> >> _______________________________________________
> >> SFS mailing list
> >> SFS@thegeek.nu
> >> http://mailman.thegeek.nu/mailman/listinfo/sfs
> >>
> >
> _______________________________________________
> SFS mailing list
> SFS@thegeek.nu
> http://mailman.thegeek.nu/mailman/listinfo/sfs
>
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<div dir=3D"ltr">Looks like someone with a Raspberry Pi had a similar sound=
ing issue.=C2=A0<a href=3D"https://raspberrypi.stackexchange.com/questions/=
13359/where-does-my-secondary-ip-come-from">https://raspberrypi.stackexchan=
ge.com/questions/13359/where-does-my-secondary-ip-come-from</a><div><br></d=
iv><div>Here's the solution they posted:</div><div><br></div><div># The=
issue was caused by a separate dhcp@network laying in <code>/etc/systemd/s=
ystem/</code></div><div># No clue where it came from, but deleting it solve=
d my problem :)</div></div><div class=3D"gmail_extra"><br><div class=3D"gma=
il_quote">On Wed, Oct 11, 2017 at 2:32 PM, Corey <span dir=3D"ltr"><<a h=
ref=3D"mailto:skiabq@gmail.com" target=3D"_blank">skiabq@gmail.com</a>><=
/span> wrote:<br><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8=
ex;border-left:1px #ccc solid;padding-left:1ex">Hi Mr. Willson -<br>
<br>
Yes, it is persistant thru a reboot.<br>
<br>
Ip address delete removes both of them (even if I just specify the<br>
dynamic IP), but a reboot restores them both.<br>
<br>
I have joined MatterMost as "n3rDy".<br>
<br>
Thanks<br>
<span class=3D"HOEnZb"><font color=3D"#888888"><br>
Corey<br>
</font></span><div class=3D"HOEnZb"><div class=3D"h5"><br>
On 10/11/17, David L. Willson <<a href=3D"mailto:DLWillson@thegeek.nu">D=
LWillson@thegeek.nu</a>> wrote:<br>
> Does it persist through a reboot?<br>
><br>
> Does the undesired address come off, and stay off (for a long time), i=
f you<br>
> 'ip address delete (it)'?<br>
><br>
> It seems like this might take a few rounds of Q & T & A ... Ma=
ybe you should<br>
> come hang out with us in MatterMost:<br>
> <a href=3D"https://mattermost.sofree.us/signup_user_complete/?id=3Dbrm=
czfxbrjr15ggn7rwtpwgthy" rel=3D"noreferrer" target=3D"_blank">https://matte=
rmost.sofree.us/<wbr>signup_user_complete/?id=3D<wbr>brmczfxbrjr15ggn7rwtpw=
gthy</a><br>
><br>
> --<br>
> David L. Willson<br>
> Teacher, Engineer, Evangelist<br>
> COA LFCS CCAH RHCE CLP<br>
> Mobile 720-333-LANS(5267)<br>
> <a href=3D"http://sofree.us" rel=3D"noreferrer" target=3D"_blank">http=
://sofree.us</a><br>
><br>
> This is a good time for a r3VOLution.<br>
><br>
> ----- Original Message -----<br>
>> Hopefully this message will get to everybody, I think I sent it to=
<br>
>> the<br>
>> right address . . . if not would somebody forward it to the brain<=
br>
>> trust for me?<br>
>><br>
>> Thanks in advance for any advice and or sarcasm offered ;-)<br>
>><br>
>> I have an issue with an Ubuntu server that I just upgraded from 14=
.04<br>
>> to 16.04 using the do-release-upgrade command. I know it is not<br=
>
>> ideal,<br>
>> but this was preferred over a clean install. Everything seemed to =
go<br>
>> well, but now eth0 has 2 IP addresses, 1 dynamic (I don't need=
or<br>
>> want) and 1 static, which is the actual one that I want. They are<=
br>
>> both<br>
>> working fine and I can SSH to the server on either address. How ca=
n I<br>
>> turn off the 1 dynamic address?<br>
>><br>
>> Here is my interfaces file:<br>
>><br>
>> # The loopback network interface<br>
>> auto lo<br>
>> iface lo inet loopback<br>
>><br>
>> # The primary network interface<br>
>> auto eth0<br>
>> iface eth0 inet static<br>
>>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0address 10.0.1.211<br>
>>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0netmask 255.255.255.0<br>
>>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0network 10.0.1.0<br>
>>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0broadcast 10.0.1.255<br>
>>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0gateway 10.0.1.254<br>
>>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0dns-nameservers 10.0.1.2 10.0.1.2=
2<br>
>><br>
>> Here is the result of "ip a", notice it shows both addre=
sses, but<br>
>> "ifconfig" that follows it only shows the dynamic one:<b=
r>
>><br>
>> srv:~$ ip a<br>
>> 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state =
UNKNOWN<br>
>> group default<br>
>>=C2=A0 =C2=A0 =C2=A0link/loopback 00:00:00:00:00:00 brd 00:00:00:00=
:00:00<br>
>>=C2=A0 =C2=A0 =C2=A0inet <a href=3D"http://127.0.0.1/8" rel=3D"nore=
ferrer" target=3D"_blank">127.0.0.1/8</a> scope host lo<br>
>>=C2=A0 =C2=A0 =C2=A0 =C2=A0 valid_lft forever preferred_lft forever=
<br>
>>=C2=A0 =C2=A0 =C2=A0inet6 ::1/128 scope host<br>
>>=C2=A0 =C2=A0 =C2=A0 =C2=A0 valid_lft forever preferred_lft forever=
<br>
>> 2: eth0: <BROADCAST,MULTICAST,UP,LOWER_<wbr>UP> mtu 1500 qdi=
sc mq state UP<br>
>> group default qlen 1000<br>
>>=C2=A0 =C2=A0 =C2=A0link/ether 00:50:56:85:7a:60 brd ff:ff:ff:ff:ff=
:ff<br>
>>=C2=A0 =C2=A0 =C2=A0inet <a href=3D"http://10.0.1.64/24" rel=3D"nor=
eferrer" target=3D"_blank">10.0.1.64/24</a> brd 10.0.1.255 scope global dyn=
amic eth0<br>
>>=C2=A0 =C2=A0 =C2=A0 =C2=A0 valid_lft 258240sec preferred_lft 25824=
0sec<br>
>>=C2=A0 =C2=A0 =C2=A0inet <a href=3D"http://10.0.1.211/24" rel=3D"no=
referrer" target=3D"_blank">10.0.1.211/24</a> brd 10.0.1.255 scope global s=
econdary eth0<br>
>>=C2=A0 =C2=A0 =C2=A0 =C2=A0 valid_lft forever preferred_lft forever=
<br>
>>=C2=A0 =C2=A0 =C2=A0inet6 fe80::250:56ff:fe85:7a60/64 scope link<br=
>
>>=C2=A0 =C2=A0 =C2=A0 =C2=A0 valid_lft forever preferred_lft forever=
<br>
>><br>
>><br>
>> srv:~$ ifconfig<br>
>> eth0=C2=A0 =C2=A0 =C2=A0 Link encap:Ethernet=C2=A0 HWaddr 00:50:56=
:85:7a:60<br>
>>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0inet addr:10.0.1.64=C2=A0 =
Bcast:10.0.1.255=C2=A0 Mask:255.255.255.0<br>
>>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0inet6 addr: fe80::250:56ff=
:fe85:7a60/64 Scope:Link<br>
>>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0UP BROADCAST RUNNING MULTI=
CAST=C2=A0 MTU:1500=C2=A0 Metric:1<br>
>>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0RX packets:4454 errors:0 d=
ropped:0 overruns:0 frame:0<br>
>>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0TX packets:348 errors:0 dr=
opped:0 overruns:0 carrier:0<br>
>>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0collisions:0 txqueuelen:10=
00<br>
>>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0RX bytes:415570 (415.5 KB)=
=C2=A0 TX bytes:63700 (63.7 KB)<br>
>><br>
>> lo=C2=A0 =C2=A0 =C2=A0 =C2=A0 Link encap:Local Loopback<br>
>>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0inet addr:127.0.0.1=C2=A0 =
Mask:255.0.0.0<br>
>>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0inet6 addr: ::1/128 Scope:=
Host<br>
>>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0UP LOOPBACK RUNNING=C2=A0 =
MTU:65536=C2=A0 Metric:1<br>
>>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0RX packets:333 errors:0 dr=
opped:0 overruns:0 frame:0<br>
>>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0TX packets:333 errors:0 dr=
opped:0 overruns:0 carrier:0<br>
>>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0collisions:0 txqueuelen:0<=
br>
>>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0RX bytes:55712 (55.7 KB)=
=C2=A0 TX bytes:55712 (55.7 KB)<br>
>> ______________________________<wbr>_________________<br>
>> SFS mailing list<br>
>> <a href=3D"mailto:SFS@thegeek.nu">SFS@thegeek.nu</a><br>
>> <a href=3D"http://mailman.thegeek.nu/mailman/listinfo/sfs" rel=3D"=
noreferrer" target=3D"_blank">http://mailman.thegeek.nu/<wbr>mailman/listin=
fo/sfs</a><br>
>><br>
><br>
______________________________<wbr>_________________<br>
SFS mailing list<br>
<a href=3D"mailto:SFS@thegeek.nu">SFS@thegeek.nu</a><br>
<a href=3D"http://mailman.thegeek.nu/mailman/listinfo/sfs" rel=3D"noreferre=
r" target=3D"_blank">http://mailman.thegeek.nu/<wbr>mailman/listinfo/sfs</a=
><br>
</div></div></blockquote></div><br></div>
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