[Elphel-support] What a strange issue
Alexandre Poltorak
alexandre at elphel.com
Wed Jan 5 15:40:05 PST 2011
Jeff,
To configure your network properly after you have your first IP configured
you need to type:
ifconfig eth0:0 192.168.0.15 netmask 255.255.255.0
(you can add it to your /etc/rc.local to have it configured at boot)
ifconfig eth0 add - made a total mess, IP in one range, netmask and
broadcast from the main one...
Now about Mobotix. It did not reflashed the cameras but uploaded some files
on the camera file-system overwriting few files. ... Or... maybe it's some
strange network behavior because of the broadcast / netmask and you browse
partially both IP cameras.
If the problem persist after proper network configuration try to reflash
your camera.
In your case you record to HDD attached to the camera, but I would really
recommend separating camera network from university network for:
- security considerations (because of the default root password on the
cameras, and fully accessible web interface)
- if you would use multicast (not to overload the university network)
- not to have other's network load (possibly video surveillance camera
multicast overloading or conflicting with your multicast address...)
Apple have a small USB network card working out of the box on GNU/Linux:
http://store.apple.com/us/product/MC704ZM/A?fnode=MTY1NDEyMQ&mco=MTk0MjUyODE
Regards,
Alexandre
<http://store.apple.com/us/product/MC704ZM/A?fnode=MTY1NDEyMQ&mco=MTk0MjUyODE>
On Thu, Dec 30, 2010 at 5:15 PM, jeff witz <witzjean at gmail.com> wrote:
> Hello,
>
> We try to investigate the external trigger mode for the camera in order to
> ba able to synchronize it with a lazer plan for Particule Images
> Velocimetry.
>
> It is well known that when this mode is not well mastered the grabber
> freeze forcing a hard reset to use it again.
>
> As I have a POE switch, I would benefit from the internet connection using
> it.
>
> So I first configure my ehternet board with ifconfig and route, and then I
> add the camera domain, using
>
> ifconfig eth0 add 192.168.0.8
>
> This command creates a sub device eth0:0
>
> I thought I was able to use the camera and search on the internet.
>
> I haven't realize that the camera was visible form the entire University
> network, beacause of the netmask and gw used for the internet connection.
>
> So finally I have this if config settings
>
> eth0 Link encap:Ethernet HWaddr 00:40:45:34:6d:7a
> inet adr:134.206.140.221 Bcast:134.206.255.255
> Masque:255.255.0.0
> adr inet6: fe80::240:45ff:fe34:6d7a/64 Scope:Lien
> UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
> Packets reçus:1209670 erreurs:0 :0 overruns:0 frame:0
> TX packets:154249 errors:0 dropped:0 overruns:0 carrier:0
> collisions:0 lg file transmission:1000
> Octets reçus:655241447 (655.2 MB) Octets transmis:15551370 (15.5
> MB)
> Interruption:30 Adresse de base:0x8000
>
> eth0:0 Link encap:Ethernet HWaddr 00:40:45:34:6d:7a
> inet adr:192.168.0.8 Bcast:134.206.255.255 Masque:255.255.0.0
> UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
> Interruption:30 Adresse de base:0x8000
>
> lo Link encap:Boucle locale
> inet adr:127.0.0.1 Masque:255.0.0.0
> adr inet6: ::1/128 Scope:Hôte
> UP LOOPBACK RUNNING MTU:16436 Metric:1
> Packets reçus:843 erreurs:0 :0 overruns:0 frame:0
> TX packets:843 errors:0 dropped:0 overruns:0 carrier:0
> collisions:0 lg file transmission:0
> Octets reçus:82033 (82.0 KB) Octets transmis:82033 (82.0 KB)
>
> virbr0 Link encap:Ethernet HWaddr 86:81:1b:f1:1a:b8
> inet adr:192.168.122.1 Bcast:192.168.122.255
> Masque:255.255.255.0
> UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
> Packets reçus:0 erreurs:0 :0 overruns:0 frame:0
> TX packets:165 errors:0 dropped:0 overruns:0 carrier:0
> collisions:0 lg file transmission:0
> Octets reçus:0 (0.0 B) Octets transmis:34160 (34.1 KB)
>
> So I join you the picture I have after rebooting the camera. It seems that
> this camera was detected as a security camera and flashed by the security
> LAN I assume that it's due to the use of the same processor.
>
> I finally have to flash the camera to get a working system.
>
> So I try to known if there is a proper way to get a "secure" network.
> I find that it is possible to set the sub device eth0:0 broadcast address
> using this command :
>
> sudo ifconfig eth0:0 broadcast 192.168.0.255
>
> Using this command I finally get a configuration that seems correct :
>
> eth0 Link encap:Ethernet HWaddr 00:40:45:34:6d:7a
> inet adr:134.206.140.221 Bcast:134.206.255.255
> Masque:255.255.0.0
> adr inet6: fe80::240:45ff:fe34:6d7a/64 Scope:Lien
> UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
> Packets reçus:1226403 erreurs:0 :0 overruns:0 frame:0
> TX packets:156760 errors:0 dropped:0 overruns:0 carrier:0
> collisions:0 lg file transmission:1000
> Octets reçus:657944898 (657.9 MB) Octets transmis:16070521 (16.0
> MB)
> Interruption:30 Adresse de base:0x8000
>
> eth0:0 Link encap:Ethernet HWaddr 00:40:45:34:6d:7a
> inet adr:192.168.0.8 Bcast:192.168.0.255 Masque:255.255.0.0
> UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
> Interruption:30 Adresse de base:0x8000
>
> lo Link encap:Boucle locale
> inet adr:127.0.0.1 Masque:255.0.0.0
> adr inet6: ::1/128 Scope:Hôte
> UP LOOPBACK RUNNING MTU:16436 Metric:1
> Packets reçus:877 erreurs:0 :0 overruns:0 frame:0
> TX packets:877 errors:0 dropped:0 overruns:0 carrier:0
> collisions:0 lg file transmission:0
> Octets reçus:85106 (85.1 KB) Octets transmis:85106 (85.1 KB)
>
> virbr0 Link encap:Ethernet HWaddr 86:81:1b:f1:1a:b8
> inet adr:192.168.122.1 Bcast:192.168.122.255
> Masque:255.255.255.0
> UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
> Packets reçus:0 erreurs:0 :0 overruns:0 frame:0
> TX packets:167 errors:0 dropped:0 overruns:0 carrier:0
> collisions:0 lg file transmission:0
> Octets reçus:0 (0.0 B) Octets transmis:34685 (34.6 KB)
>
> Do you think this configuration is Ok and risk-less ?
>
> I've been advised that it would be better to buy a usb/ethernet adapter,
> but I would prefer master the switch mode. I you think it is too risky I
> will buy one of this adapters.
>
>
> So my purpose with this mail is to find a way to configure properly a LAN
> with camera and internet and to underline that we have to be careful when
> using the camera on a LAN.
>
> I hope this will prevent people using a PoE switch from bad surprises.
>
> Best regards.
>
>
>
>
>
> --
> Jean-François WITZ
>
> _______________________________________________
> Support-list mailing list
> Support-list at support.elphel.com
> http://support.elphel.com/mailman/listinfo/support-list_support.elphel.com
>
>
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