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Today's Topics:
1. No switch to WiFi dynamic IP from Ethernet link-local IP
(Frank Vasquez)
2. Re: Error with UDP server (Doron Behar)
3. Re: Error with UDP server (Doron Behar)
----------------------------------------------------------------------
Message: 1
Date: Thu, 1 Nov 2018 23:33:00 -0700
From: Frank Vasquez <[email protected]>
To: [email protected]
Subject: No switch to WiFi dynamic IP from Ethernet link-local IP
Message-ID:
<CAFJydPWW7_LPet25pOfNVx870jJDMVjeoGWZJtgBw_9=mp1...@mail.gmail.com>
Content-Type: text/plain; charset="utf-8"
Greetings,
I am trying to prioritize Ethernet over WiFi connectivity using connman on
an embedded Linux device. If no Ethernet cable is plugged in connman
attempts to connect with WiFi. However, if an Ethernet cable is plugged in
to a link-local network with no internet access connman does not fall back
to WiFi. I read some documentation that lead me to believe that it would.
"Services of the listed technology type will be tried one by one in the
order given, until one of them gets connected or they are all tried. A
service of a preferred technology type in state 'ready' will get the
default route when compared to another preferred type further down the list
with state 'ready' or with a non-preferred type; a service of a preferred
technology type in state 'online' will get the default route when compared
to either a non-preferred type or a preferred type further down in the
list."
I consider a link-local IP address to be 'ready' not 'online' so why does
connman stay connected to Ethernet in this case? I have the following
lines in my device's /etc/connman/main.conf.
PreferredTechnologies = ethernet,wifi,cellular
SingleConnectedTechnology = true
Cheers,
Frank
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Message: 2
Date: Fri, 2 Nov 2018 14:58:54 +0200
From: Doron Behar <[email protected]>
To: [email protected]
Subject: Re: Error with UDP server
Message-ID: <[email protected]>
Content-Type: text/plain; charset=utf-8
On Tue, Oct 30, 2018 at 11:15:39PM +0200, Doron Behar wrote:
> I'm having a problem when I run connman only at home, I keep getting
> this error repeatedly in the journal:
>
> Oct 30 22:42:31 NUC connmand[404]: Error with UDP server
> fdc9:8a32:cbfb:0:16ae:dbff:fe55:f320
>
> According to a reverse whois search, the server IPV6 address specified
> in the message belongs to my ISP.
>
> Additionally, I feel like at home my internet connection is much slower
> then when I connect to my Android Hotspot WiFi.
>
> Even if I configure this connection with IPV6 off the error persists.
>
> It feels like a problem on my ISP's side but how can I debug this?
In comparison to systemd-networkd, I don't experience such a slow
internet connection as I do with connman. I've tested my speed with
`fast.com` and while paying my ISP for a 100 Mbps download speed I get a
result of 93 Mbps with systemd-networkd and 54 Mbps with connman.
------------------------------
Message: 3
Date: Fri, 2 Nov 2018 18:01:34 +0200
From: Doron Behar <[email protected]>
To: [email protected]
Subject: Re: Error with UDP server
Message-ID: <[email protected]>
Content-Type: text/plain; charset=utf-8
On Fri, Nov 02, 2018 at 02:58:54PM +0200, Doron Behar wrote:
> On Tue, Oct 30, 2018 at 11:15:39PM +0200, Doron Behar wrote:
> > I'm having a problem when I run connman only at home, I keep getting
> > this error repeatedly in the journal:
> >
> > Oct 30 22:42:31 NUC connmand[404]: Error with UDP server
> > fdc9:8a32:cbfb:0:16ae:dbff:fe55:f320
> >
> > According to a reverse whois search, the server IPV6 address specified
> > in the message belongs to my ISP.
> >
> > Additionally, I feel like at home my internet connection is much slower
> > then when I connect to my Android Hotspot WiFi.
> >
> > Even if I configure this connection with IPV6 off the error persists.
> >
> > It feels like a problem on my ISP's side but how can I debug this?
>
> In comparison to systemd-networkd, I don't experience such a slow
> internet connection as I do with connman. I've tested my speed with
> `fast.com` and while paying my ISP for a 100 Mbps download speed I get a
> result of 93 Mbps with systemd-networkd and 54 Mbps with connman.
Oh right I think I've fixed it, my `/etc/resolv.conf` didn't have any
lines in it and when I used systemd-networkd I've also enabled
`systemd-resolved` and that's why my internet connection was so slow
with connman.
Thanks anyway, this thread is solved for me.
------------------------------
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End of connman Digest, Vol 37, Issue 1
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