Re: the problem of NAT gateways of our LAN (PSE-A + PSE-B)

[Christian Lathion <christian.lathion@switzernet.com>]

We changed the cabling to a central switch, it did not solve the problem.
Setting the vtx device into bridge mode with a linksys spa3102 as router 
did not solve the problem, neither shutting down the swisscom router.

Kerim proposes to try by inverting the direction of the wifi link.
Christian thinks of some strange network problem (MTU mismatch or packet 
fragmentation on the wifi link), but it should not cause problems with ping.

On 2009-03-04 18:08, Emin Gabrielyan wrote:
> Christian, Kerim,
>
> I suspect that the strange problem comes from the fact that in PSE-A 
> the Swisscom router is a kind of a central switch. Offices and other 
> switches are interconnected via the switch integrated in this router. 
> All cables of different parts of LAN shall be connected to a neutral 
> switch. The Swisscom router must be also connected to that neutral 
> switch as an appendix (no other LAN part must transit via Swisscom 
> router). I hope that after this, the problem will be solved.
>
> Please do it, maybe today, because anyway the day is lost due to STEG
>
> Emin
>
> Reference:
> http://www.unappel.ch/public/090227-switzernet-pse-lan/
> http://switzernet.com/public/090227-switzernet-pse-lan/
> This doc must be updated once the LAN works properly
> - add the missing screen shot with the VTX in PSE-B
> - add the diagram of our network [gw EPFL] -- [gw VTX] -- [gw 
> Swisscom] --- LAN PSE-A [bridge] ---- [bridge] LAN PSE-B --- [gw VTX]
> - specify the connection parameters (upstream/downstream/monthly fees)

--
Christian Lathion
Technical Manager
-----------------------------------------------------------------
Email: <<christian.lathion@switzernet.com>>
-----------------------------------------------------------------
Switzernet Sàrl
PSE-Bâtiment A
CH-1015 Lausanne

Internet: <<http://www.switzernet.com>>
Email: <<info@switzernet.com>>
----------------------------------------------------------------- 



--
No virus found in this incoming message.
Checked by AVG. 
Version: 7.5.557 / Virus Database: 270.11.8/1984 - Release Date: 3/4/2009 7:17 PM