Amiga-2000
asked on
Virtual 2008 R2 dropping RDP connections
Hi
Am running Hyper-V 2008 R2 with all Windows updates on Dell T610 with Dual broadcom NICs.
Guests
SBS 2011 with 32 GB RAM
2008 R2 (from premium licence) with RDS Role
I've activated the RDS User cals on the RDS Server and can RDP into the machine intermittently. The trouble is the RDS server intermittently is dropping the connections. Either from a machine on the same LAN segment or from the virtualized SBS 2011 I try to open an RDP connection and receive the error the computer was not contactable.
This is confirmed when I telnet 192.168.1.10 3389. The attempt fails, if I wait 5 or 10 seconds and try the telnet again the screen goes black indicating a connection. If I then switch back to RD client and retry the connection the RDP session opens as it should.
I've seen a few blogs about disabling Large Sending Offload and have used the below article to install the broadcom management software to disable LSO both NICS on the Hyper-V Host. I have also disabled the LSO on the NIC properties on the RDS VM
http://mrshannon.wordpress.com/2010/01/13/jumbo-frames-on-hyper-v-server/
I'm running latest drivers from the Dell website
I'm still getting the issue.
Hope someone can help as I've pulled most of my hair out.
Thanks
Am running Hyper-V 2008 R2 with all Windows updates on Dell T610 with Dual broadcom NICs.
Guests
SBS 2011 with 32 GB RAM
2008 R2 (from premium licence) with RDS Role
I've activated the RDS User cals on the RDS Server and can RDP into the machine intermittently. The trouble is the RDS server intermittently is dropping the connections. Either from a machine on the same LAN segment or from the virtualized SBS 2011 I try to open an RDP connection and receive the error the computer was not contactable.
This is confirmed when I telnet 192.168.1.10 3389. The attempt fails, if I wait 5 or 10 seconds and try the telnet again the screen goes black indicating a connection. If I then switch back to RD client and retry the connection the RDP session opens as it should.
I've seen a few blogs about disabling Large Sending Offload and have used the below article to install the broadcom management software to disable LSO both NICS on the Hyper-V Host. I have also disabled the LSO on the NIC properties on the RDS VM
http://mrshannon.wordpress.com/2010/01/13/jumbo-frames-on-hyper-v-server/
I'm running latest drivers from the Dell website
I'm still getting the issue.
Hope someone can help as I've pulled most of my hair out.
Thanks
ASKER CERTIFIED SOLUTION
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you are aware rdp has been compromised ?
Amiga-2000 just glad to hear its fixed - I know how it feels - had an entire site down inlcuding a VMWARE HA cluster, Wifi, Desktops, printers, nurse call system - nothing worked. What was it??? A user had plugged a cable they found into a wall socket - creating a massive loop. it took 4 1/2 hrs to find.
ASKER
LOL - gotta love a user plugging in a spare cable.
Cheers
Cheers
ASKER
@IanTh - what do you mean compromised?
ASKER
I'll close this one. I assume IanTh was refering to last months RDP vulnerability but all server are patched so this was nothing to do with the issue. Thank mbkitmgr
yes ms12-020 was meant to fix it but it didnt its a kb now
see
http://technet.microsoft.com/en-gb/security/bulletin/ms12-020
see
http://technet.microsoft.com/en-gb/security/bulletin/ms12-020
ASKER
Man the things I've been through, TOE, offloading, chimney, RSS, and it looks like a damn duplicate IP
Didn't actually see your resposne till now but will accept and leave this to heopfully save another poor sap the agony
Thx