Ping failes for fqdn with two records, first record unavailable

Scenario is:
10.80.56.147 = DOWN (unavailable)
10.80.56.148 = UP (available)
bash-2.05# nslookup cscs.floreffe.se
Server: idns.floreffe.se
Address: 10.80.56.186
Name: cscs.floreffe.se
Addresses: 10.80.56.147, 10.80.56.148
bash-2.05# ping cscs.floreffe.se
no answer from cscs.floreffe.se
Why does ping fail? Why does not secondary IP address being used.

BadboyRune wrote:
Hi,
Thanks for your answer, I have alredy disabled nscd on the system. So Solaris doesn't make some kind of check if the first IP is reachable, or saves both addresses? No. That is uncommon in most UNIX applications. The application is usually trying to operate on a single address, and uses names just to look up the address that it will use.
There are more robust applications that become more complex with dynamic name changes supported, real-time failover support, etc, but that's not an OS feature, it's handled per-application. 'ping' does not do so. TCP connections are bound to a specific address. For an application to use TCP and multiple addresses, it has to recognize the problem, then re-establish a new connection with the host, etc... This is not commonly done.
The reason for the question in the first place are the redundancy problems we have faced. If the first address isn't reachable, the second one has to be used...
What's the application? Why is the address going down? In some cases this could be handled through the use of IPMP or maybe through a load-balancer application/appliance. But that would depend on your network topology and the actual problem that you're encountering.
Darren

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