Just to share my issue and the solution.
I had a SharePoint farm with 2 servers : one for IIS, second for SQL. I configured my SharePoint Backup under NBU 18.104.22.168 as requested in Netbackup For SharePoint Admin Guide.
I launched my backup, 3 jobs were created : parent, SQL data (on SQL Server), dans Global Settings and Search (on IIS server). SQL job finished with status code 0, IIS jobs finished with satus 71.
I searched a lot in docs, forum, without answers... and... I found this TECH195147 about code 1 under SharePoint. I thought that it was not same problem but it was... For the same issue, you have code 1 if your SharePoint server is SQL and IIS, and if you have 2 different servers, IIS job will return status code 71.
So, I have created this post for people who search "sharepoint 71"
PS : Sorry for my english :-/
Hostname resolution was "perfect" with network stuffs (ping, nslookup <hostname>, nlsookup <IP>)...
But SharePoint was configured with short name, so, half of NetBackup jobs failed because of FQDN usage and internal SharePoint backup mecanisms that not allows it.
We can use bpclntcmd commands provided below to check and ensure name resolution is working fine for Netbackup.
Unix : /usr/openv/netbackup/bin
Windows : Veritas\netbackup\bin
bpclntcmd -hn <Client Short Name>
bpclntcmd -hn <Client fully qualified domain name >
bpclntcmd -ip <Client Server ip