the network interface has been lost

[Anahaym]

Hello,

I have a Hyper-V host and network storage which is connected to that host via two network cards using iSCSI and MPIO.
After an updating 2-3 weeks ago I noticed that one interface has disappeared. Ipconfig and netsh don't see it.

ipconfig /all
Windows IP Configuration

Host Name . . . . . . . . . . . . : HYPER-1
Primary Dns Suffix . . . . . . . :
Node Type . . . . . . . . . . . . : Hybrid
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No
DNS Suffix Search List. . . . . . :

Ethernet adapter LAN2:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Intel(R) 82574L Gigabit Network Connection #2
Physical Address. . . . . . . . . : 0C-C4-7A-4A-9B-F9
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes
Link-local IPv6 Address . . . . . : fe80::b171:f50e:3747:d4fc%13(Preferred)
IPv4 Address. . . . . . . . . . . : 10.255.9.12(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . :
DHCPv6 IAID . . . . . . . . . . . : 369935482
DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-1D-23-01-4F-0C-C4-7A-4A-9B-F8
DNS Servers . . . . . . . . . . . : 10.255.9.11
NetBIOS over Tcpip. . . . . . . . : Enabled

netsh interface ipv4 show interfaces
Idx Met MTU State Name
--- ---------- ---------- ------------ ---------------------------
1 50 4294967295 connected Loopback Pseudo-Interface 1
13 10 1500 connected LAN2

get-wmiobject win32_networkadapter | select netconnectionid, name, InterfaceIndex, netconnectionstatus
netconnectionid name InterfaceIndex netconnectionstatus
--------------- ---- -------------- -------------------
LAN1 Intel(R) 82574L Gigabit Network Connection 12 2
LAN2 Intel(R) 82574L Gigabit Network Connectio... 13 2

Get-NetAdapter
Name InterfaceDescription ifIndex Status MacAddress LinkSpeed
---- -------------------- ------- ------ ---------- ---------
Hyper-V Virtual Ethernet Adapter #2 0 bps
LAN2 Intel(R) 82574L Gigabit Network Co...#2 13 Up 0C-C4-7A-4A-9B-F9 1 Gbps
LAN1 Intel(R) 82574L Gigabit Network Conn... 12 Up 0C-C4-7A-4A-9B-F8 1 Gbps

I tried to disable and enable this interface but the server got disconnected:

Disable-NetAdapter -Name LAN1

Confirm
Are you sure you want to perform this action?
Disable-NetAdapter 'LAN1'
[Y] Yes [A] Yes to All [N] No [L] No to All [?] Help (default is "Y"):
WARNING: The network connection to hyper-1 has been interrupted. Attempting to reconnect for up to 4 minutes...
WARNING: Attempting to reconnect to hyper-1 ...
WARNING: The network connection to hyper-1 has been restored.

Now I have problems with my backup task and many iSCSI errors:





How can I bring this interface back?
Can I remove this interface from MPIO without any interruptions?



Also MCS configured as Round Robin. Should I change it?



Thank you in advance!

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