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heiko_s
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Bridging EoIP & Ethernet - Kernel panic

Mon Jul 23, 2007 8:45 am

Hello to everyone,
i tried the search function but didn't find anything usuable...
We have following configuration up and working fine:
Router OS 2.9.44 on an PC with 2 Ethernet interfaces.
ether1 connected to a dsl router,
ether2 connected to internal net.
Our internal net is covering a wide area with mainly RB532 units.
For that we built up EoIP tunnels from AP to the router over a routed bachhaul.
On the router, we built up a bridge with the EoIP tunnels and the ether2 inside.
The IP address is bound to the ether2 interface.
Right now, we have 3 tunnels in the bridge and everything works fine with very low latency.

Yesterday i tried to add a new EoIP tunnel to the bridge. After adding the tunnel to the bridge, the router stopped.
A view on the console showing that the router is stopped with a kernelpanic and started to reboot. Every time it comes up, the failure occures again and again - alsways rebooting the device.
I extracted the ethernet cards from the device and was after that able to logon.
After removing the new tunnle from the bridge, everything works fine again.

Has anybody a idea for that issue?

Thanks in advance!
Heiko
 
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jagowan
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Re: Bridging EoIP & Ethernet - Kernel panic

Tue Jul 24, 2007 1:05 pm

have you check the mac address each EoIP ? maybe there're have the same one.
 
heiko_s
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Re: Bridging EoIP & Ethernet - Kernel panic

Tue Jul 24, 2007 1:15 pm

have you check the mac address each EoIP ? maybe there're have the same one.
Yes i did.
There were no duplicate MAC in the bridge or tunnels.
I realized, that for EoIP should use a certain range of MAC addresses - i think all my MAC are from outside of that range...
 
cmit
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Re: Bridging EoIP & Ethernet - Kernel panic

Tue Jul 24, 2007 1:18 pm

We have seen the strangest problems if you do use MAC addresses other than from the range described in the manual.
All of those problems were fixed by simply using the "correct" MAC addresses.

Well worth a try!

Best regards,
Christian Meis
 
heiko_s
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Posts: 40
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Location: germany

Re: Bridging EoIP & Ethernet - Kernel panic

Tue Jul 24, 2007 1:34 pm

We have seen the strangest problems if you do use MAC addresses other than from the range described in the manual.
All of those problems were fixed by simply using the "correct" MAC addresses.
I've already heard about that - i'll test it on thursday evening.
Hope that works!

Other question: is there a good and simple howto how to build EoIP tunnels on top of an encrypted "connection"?
(i'd like to turn off the WPA encryption an use just encrypted tunnels on the bachhaul)
 
cmit
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Re: Bridging EoIP & Ethernet - Kernel panic

Tue Jul 24, 2007 1:38 pm

You could IPsec encrypt those tunnel, for example.

But you have to be aware that an additional layer of security in form of an encrypted tunnel will add more overhead to your backbone, so your usable MTU will get lower again.

Apart from that, I don't have a real example to follow step-by-step...

Best regards,
Christian Meis
 
heiko_s
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Re: Bridging EoIP & Ethernet - Kernel panic

Thu Jul 26, 2007 7:32 pm

We have seen the strangest problems if you do use MAC addresses other than from the range described in the manual.
All of those problems were fixed by simply using the "correct" MAC addresses.

Well worth a try!

Best regards,
Christian Meis
Hi Christian,
i gave it a try... and nothing changed at all.
:(
What i did:
I moved the IP address from the physical interface ether2 to the bridge.
I corrected all the MAC's from the EoIP Tunnels to the range mentioned in the documentation
00-00-5E-80-00-00 to 00-00-5E-FF-FF-FF
Here is the config:
EoIP Startpoint Mac1 Endpoint Mac2
EoIP1 00:00:5E:80:00:01 00:00:5E:80:00:02
EoIP2 00:00:5E:80:00:03 00:00:5E:80:00:04
EoIP3 00:00:5E:80:00:05 00:00:5E:80:00:06
EoIP4 00:00:5E:80:00:07 00:00:5E:80:00:08

The first 3 EoIP tunnels resided in the bridge. The fourth was functional and so i moved it into the bridge am boom - bang - zoff - the router blow up in flames ;o) an started the well known rebooting orgie.

I have one idea - tunnel 1 to 3 are all located on a different routed subnet, tunnel 4 is built over the same subnet like tunnel 3.

(tunnel3 172.16.10.25/29 tunnel4 172.16.10.27/29)

Anyone with an idea?
I have to built up at least 4 new tunnels and have them in the bridge, so i need urgent help!

Thanks in advance!
Regards Heiko
 
heiko_s
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Re: Bridging EoIP & Ethernet - Kernel panic

Thu Aug 02, 2007 3:36 pm

as i found nothing wrong, i decided to set up a routerboard for testing with the desired tunnel.
This worked fine, so the tunnel-config can't be the problem?

Is there anybody out there with an idea?

H E L P :D

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