2007/5/14, Mário Ferreira < mariojvp@gmail.com>:

Hi,

# ser -V
version: ser 0.10.99-dev53-tm_fixes (i386/linux)
flags: STATS: Off, USE_IPV6, USE_TCP, DISABLE_NAGLE, USE_MCAST, DNS_IP_HACK, SHM_MEM, SHM_MMAP, PKG_MALLOC, DBG_QM_MALLOC, FAST_LOCK-ADAPTIVE_WAIT, USE_DNS_CACHE, USE_DNS_FAILOVER, USE_DST_BLACKLIST
ADAPTIVE_WAIT_LOOPS=1024, MAX_RECV_BUFFER_SIZE 262144, MAX_LISTEN 16, MAX_URI_SIZE 1024, BUF_SIZE 65535
poll method support: poll, epoll_lt, epoll_et, sigio_rt, select.
@(#) $Id: main.c 136 2007-02-13 17:58:42Z vingarzan $
main.c compiled on 22:49:24 Mar 26 2007 with gcc 3.4.6

# dig NAPTR open-ims.test

; <<>> DiG 9.2.4 <<>> NAPTR open-ims.test
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 56440
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 1, ADDITIONAL: 3

;; QUESTION SECTION:
;open-ims.test.                 IN      NAPTR

;; ANSWER SECTION:
open-ims.test.          86400   IN      NAPTR   10 50 "s" "SIP+D2U" "" _sip._udp.open- ims.test.
open-ims.test.          86400   IN      NAPTR   20 50 "s" "SIP+D2T" "" _sip._tcp.open-ims.test.

;; AUTHORITY SECTION:
open-ims.test.          86400   IN      NS      127.0.0.1.open-ims.test .

;; ADDITIONAL SECTION:
icscf.open-ims.test.    86400   IN      A       127.0.0.1
_sip._udp.open-ims.test . 86400 IN      SRV     0 0 5060 icscf.open-ims.test.
_sip._tcp.open- ims.test. 86400 IN      SRV     0 0 5060 icscf.open-ims.test.

;; Query time: 0 msec
;; SERVER: 127.0.0.1#53(127.0.0.1 )
;; WHEN: Mon May 14 18:24:18 2007
;; MSG SIZE rcvd: 259

# dig _sip._udp.scscf.open-ims.test. srv

; <<>> DiG 9.2.4 <<>> _sip._udp.scscf.open-ims.test. srv
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 21445
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 1, ADDITIONAL: 1

;; QUESTION SECTION:
;_sip._udp.scscf.open-ims.test. IN      SRV

;; ANSWER SECTION:
_sip._udp.scscf.open-ims.test. 86400 IN SRV     0 1 6060 scscf.open-ims.test.
_sip._udp.scscf.open-ims.test. 86400 IN SRV     0 1 6061 scscf.open-ims.test.

;; AUTHORITY SECTION:
open-ims.test.          86400   IN      NS      127.0.0.1.open-ims.test.

;; ADDITIONAL SECTION:
scscf.open-ims.test.    86400   IN      A       127.0.0.1

;; Query time: 0 msec
;; SERVER: 127.0.0.1#53( 127.0.0.1)
;; WHEN: Mon May 14 18:26:33 2007
;; MSG SIZE rcvd: 165

regards,

Mário Ferreira

On 5/13/07, samuel <samu60@gmail.com> wrote:
I have tried DNS failover and can assert is working like charm for SER version 2.0 and further.
Which SER version are you using?

can you check wheter you have compiled SER with DNS failover?
which is the ouput of
            #ser -V
what is the ouput of
            #dig NAPTR yourdomain.name.com
(replace yourdomain.name.com for the appropriate valie)

regards,
sam.

2007/5/10, Mário Ferreira <mariojvp@gmail.com >:
Hi,

I am interested in using SER DNS failover, but I am getting some problems.

A failure can be a 503 error response, ICMP errors or a timeout due to a not received response.

Does anyone know if SER is able to detect these failures and then select an alternative destination for the message?

If the ICMP errors can't be detected, can this be solved with timers?
I turned on use_dns_cache and use_dns_failover, but when the message fails to be delivered to the first destination,
SER never tries the second destination, which was configured with DNS SRV.

regards,

Mário Ferreira

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