I don;t have any answers for you... But I would love to hear about the results after you get this working and what road blocks you hit and how you overcame them.
-- Matt ________________________________________ From: [EMAIL PROTECTED] [EMAIL PROTECTED] On Behalf Of Ex Vito [EMAIL PROTECTED] Sent: Wednesday, May 07, 2008 10:08 PM To: Asterisk Users Mailing List - Non-Commercial Discussion Subject: [asterisk-users] dundi network - redundancy / fault tolerance ? Hi list, I'm planning a private DUNDi network for a cross-country distributed PBX. Initially it will be composed of about 10 systems, growing to about 20. Current requirements point to a topology of two interconnected "DUNDi hubs", each peering with half the PBXs... This would lead to two interconnected / inter-peered stars. Example: - Consider PBXs A to H - C and E will be hubs and peer with each other - A, B and D peer with C - F, G and H peer with E This leads to a maximum three hop lookup and will make good use of current network topology / bandwidths. Of course, should any of the hubs be unavailable and the lookup capability is severely compromised. Now, how to move on to acheive some kind of fault tolerance ? According to the docs we've studied, DUNDi does not like loops (which we assume one can limit with low enough TTLs). Our doubts are: - Should one use the "order" peer parameter to specify alternate lookup paths / peers ? Is that its purpose ? If not, what is it used for ? - Alternatively, should one create loops in the DUNDi topology and limit them via TTL ? - If both options are possible, which would be the trade-offs between them ? (Not clear at all to us!) - Assuming any of the above is possible as a means to acheive redundancy, which of the following topologies would your prefer ? (hmmm, maybe I need to refresh my graph theory...) ;-) #1 - Peer each PBX with both hubs #2 - Duplicate both hubs and peer each PBX with its hub and its hub dup For better understanding, take a look at: #1 - http://www.2photosharing.com/images/qhpnzycd7j7kf26j2f.png #2 - http://www.2photosharing.com/images/npzbwvgnr4t079laou0.png Thanks in advance for review and feedback. Cheers, -- exvito _______________________________________________ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users _______________________________________________ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users