[SR-Users] Loadbalancing proxy using DNS SRV instead of dispatcher

[Cezary Siwek]

Hey,

Try setting weight of all your SRV records to 0.


Regards,
Cezary


On 16/04/2015 16:42, Daniel Tryba wrote:
> The idea is to use SRV records instead of a dispatcher by setting $rd to a DNS
> SRV enabled host (with all hosts having the same prio and weight).
>
> Problem is that when authentication is required the flow is as follows (with 2
> hosts):
>
> 1:
> UAC INVITE/REGISTER -> LB -> SIP0
> SIP0 401 with nonce1 challenge ->  LB -> UAC
> UAC ACK -> LB -> SIP0
>
> 2:
> UAC INVITE/REGISTER with nonce1 response -> LB -> SIP1
> SIP1 401 with nonce2 challenge -> LB -> UAC
> UACK ACK -> LB -> SIP1
>
> 3:
> UAC INVITE/REGISTER with nonce2 response -> LB -> SIP0
> SIP0 401 with nonce1 challenge -> LB -> UAC
> UACK ACK -> LB -> SIP0
>
> 4: UAC either gives up or goes to 2
>
> Using the dispatcher module this can be solved by using a hash over either
> from/to/request URI. I can't find any hints for forcing the dialog to 1
> backend.
>
> BTW the idea is to keep the loadbalancing proxy as simple/stupid as possible
> (no db), the backends have a shared db.
>
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