NBRMMS service is not starting on a newly installed media server

Problem

nbrmms service is not starting on media server

Error Message

From event viewer logs we see below error :

"A timeout was reached (30000 milliseconds) while waiting for the NetBackup Remote Manager and Monitor Service service to connect."

Cause

Multiple interfaces on media server , large reverse lookup time for media server interfaces :

C:\Program Files\Veritas\NetBackup\bin>bptestnetconn -frap -v -s
SERVER = masterserver
SERVER = mediaserver
------------------------------------------------
NBU IP_ADDRESS_FAMILY configured to use Remote Addresses:  IPv4(yes) IPv6(no)
FL:                            masterserver -> 1.2.3.4                                :      0 ms FAST (< 10 sec) SRC: ANY
FL:                           mediaserver -> 2.3.4.5 WARNING: LINK-LOCAL [NOT USED] :      0 ms FAST (< 10 sec) [local] TGT PROHIBITED
FL:                           mediaserver -> 3.4.5.6 WARNING: LINK-LOCAL [NOT USED] :      0 ms FAST (< 10 sec) [local] TGT PROHIBITED
FL:                            mediaserver -> 10.20.30.40                             :      0 ms FAST (< 10 sec) [local] SRC: ANY
FL:                           mediaserver -> 169.1.2.3 WARNING: LINK-LOCAL (APIPA) [NOT USED] :      0 ms FAST (< 10 sec) [local] TGT PROHIBITED
FL:                            mediaserver -> 4.3.2.1                              :      0 ms FAST (< 10 sec) SRC: ANY
------------------------------------------------------------------------
RL:                            1.2.3.4 -> masterserver            :      0 ms FAST (< 10 sec)
RL:                            2.3.4.5 -> mediaserver :      0 ms FAST (< 10 sec)
RL:                           3.4.5.6 -> mediaserver :  11091 ms SLOW (> 10 sec)
RL:                            10.20.30.40 -> mediaserver :      0 ms FAST (< 10 sec)
RL:                           169.1.2.3 -> mediaserver :  15797 ms SLOW (> 10 sec)
RL:                            4.3.2.1 -> mediaserver           :      0 ms FAST (< 10 sec)
RL:                                     ::1 -> mediaserver :      0 ms FAST (< 10 sec)
RL:                            127.0.0.1 -> mediaserver :      0 ms FAST (< 10 sec)
------------------------------------------------------------------------
Slow (>10 sec) or/and failed/mismatched reverse lookups:
mediaserver :     15 sec
------------------------------------------------------------------------

Solution

After disabling the slow interfaces followed by a reboot of media server fixed the problem with nbrmms service.

Service was now starting very quickly and bptestnetconn -frap -v -s command shows output very quickly and none of the reverse lookups were slow now.