Vscan server will not connect to one or more nodes

Applies to

• ONTAP 9
• ONTAP Antivirus Connector
• Vscan

Issue

• One or more ONTAP cluster nodes will not connect to a defined VSCAN server.
• Configuration is correct per the appropriate Ontap 9 Antivirus Configuration Guide.
• No scanning is occurring despite one node showing as 'connected'.

Cluster::> vscan connection-status show
(vserver vscan connection-status show)
Connected Connected
Vserver Node Server-Count Servers
--------------- ------------------- ------------ -----------------------------
svm1 node1 1 10.x0x.x0x.5x
svm1 node2 0 -
2 entries were displayed.

• AV connector logs display a sequence similar to the following:

11.045: Attempting reverse DNS lookup of 10.x0.1x.2x
11.060: Found host SVM.domain.local for IP 10.x0.1x.2x
11.247: Attempting reverse DNS lookup of 10.1x.x0.3x
11.263: 10.x0.1x.2x resolved to SVM.domain.local
11.450: Found host SVM.domain.local for IP 10.1x.x0.3x
11.450: 10.1x.x0.3x resolved to SVM.domain.local

• AV Connector 1.0.4 logs display a sequence similar to the following:

• 01/27/21-11:11:19.182Z Found host SVM.domain.local for IP 10.x0.1x.2x
01/27/21-11:11:19.182Z SVM.domain.local resolves to multiple IP addresses; cannot use it.

  Note: Both LIFs resolve to the same hostname.

• Multiple data LIFs resolve to the same DNS name, but only one IP is returned when looking for the hostname.
• A host record

C:\Windows\System32> nslookup SVM
Server: UnKnown
Address: 10.1x.x0x.1x
Non-authoritative answer:
Name: svm.domain.local
Address: 10.x0.1x.2x 
C:\Windows\System32> nslookup SVM
Server: UnKnown
Address: 10.1x.x0x.1x
Non-authoritative answer:
Name: svm.domain.local
Address: 10.1x.x0.3x

Note: Only 1 IP

• Reverse DNS lookup

C:\Windows\system32> nslookup 10.x0.1x.2x
Server: UnKnown
Address: 10.1x.x0x.1x
Name: svm.domain.local 
Address: 10.x0.1x.2x
PS C:\Windows\system32> nslookup 10.1x.x0.3x
Server: UnKnown
Address: 10.1x.x0x.1x
Name: svm.domain.local 
Address: 10.1x.x0.3x

Note: Same name