Exchange 2013 DAG Error - MapiDAGNetwork is not up. ReplicationDAGNetwork is not up. Current state is 'Misconfigured'

Whenever you add additional network to the DAG network for example additional interface for ISCSI, additional LAN Interface for Storage or additional LAN interface to take backup this may leads to collide with Exchange 2013 DAG network automatically and may result issue as follows,

• ·         Random disrupt on the email connecitivity
• ·         Issue on the email flow
• ·         Queue in the transport service.

This can be verified on running the cmdlet 

Get-DatabaseAvailabilityGroupNetwork | format-list Subnet

It shows as Misconfigured.The cause for the issue  is by default in Exchange 2013, DAG networks are automatically configured by the system. Make sure the binding of the network interface that is newly added other than default DAG networks need to be moved below. This can be achieved on selecting network connection – advance connection - bindings

Solution

1.        Enable the DAG network as manual

Set-DatabaseAvailabilityGroup -ManualDagNetworkConfiguration $true

2.        Disabling the network in DAG

Set-DatabaseAvailabilityGroupNetwork -Identity DAG2\DAGNetwork02 -ReplicationEnabled:$false -IgnoreNetwork:$true

3.        Verify the DAG network

Get-DatabaseAvailabilityGroupNetwork | format-list Subnet

4.        Verification of Network role Status in Cluster

Check the Network role status in the cluster service (New Network 01)

if Role 0 (0×0) tells the cluster not to use the network;

if Role 1 (0×1) tells the cluster that this is a private network;

if Role 3 (0×3) tells the cluster that this is a public network.

C:\Windows\system32>cluster network 'New Network 01' /prop

Listing properties for 'New Network 01':

T  Network              Name                           Value

-- -------------------- ------------------------------ -----------------------

SR Cluster Network 1    Name                           Cluster Network 1

MR Cluster Network 1    IPv6Addresses

MR Cluster Network 1    IPv6PrefixLengths

MR Cluster Network 1    IPv4Addresses                  100.200.26.0

MR Cluster Network 1    IPv4PrefixLengths              24

SR Cluster Network 1    Address                        100.200.26.0

SR Cluster Network 1    AddressMask                    255.255.255.0

S  Cluster Network 1    Description

D  Cluster Network 1    Role                           3 (0x3)

D  Cluster Network 1    Metric                         10000 (0x2710)

D  Cluster Network 1    AutoMetric                     1 (0x1)

If role is not 0 then set the Role to 0:

Cluster network 'New Network 01' /prop Role=0

5.        Verifying the Cluster properities

[PS] C:\Windows\system32>cluster /prop

6.        Listing the Cluster Network properities

[PS] C:\Windows\system32>cluster network /prop

7.        Verifying the Cluster Network Interface status

[PS] C:\Windows\system32>cluster netint

8.        Checking the Quorum Type

[PS] C:\Windows\system32>cluster /quorum

9.        Check out the incoming and Outgoing Connection status

Get-MailboxDatabaseCopyStatus * -ConnectionStatus | Select-Object MailboxServer, ID, *Connections, *network | Export-Csv C:\temp\repl.csv

10.     Check the all the network informated connected to the server

Get-DatabaseAvailabilityGroupNetwork -Server | Select Name, MapiAccessEnabled, ReplicationEnabled, IgnoreNetwork