Windows 2008 R2 multi homed Network not working properly
Hello,
I have a Windows 2008 R2 standard server with 4 NIC cards. 1 NIC card is connected to a domain. Other 3 NIC cards are connected to 3 separate networks. This server is intended as NMS system to monitor several switches connected in 3 NIC Cards. I am having
the problem of PING and Telent drop randomly in all three networks except one connected to domain. I am having only switches in these networks. Currently NLA is disabled in all 3 networks. If I disable ANY network connections and re-enable the network, PING
will work for an IP which I am having problem, but some other IP will stop working. I am having some 50 switches and facing the problem in 4-5 switches regularly. PING and Telent are not working randomly i.e. sometimes I cant PING but I am able to Telent
the system and some other times I cant Telnet but I can PING the switch. Every time I disable/enable the network, problem will propagate to some other switch.
Firewall OFF
Anti-virus None
Do anybody have any idea why Win 2K8 server is working so weirdly! How can I fix this issue?
February 14th, 2012 2:46pm
Hi,
Thanks for posting here.
The addresses we bound for each these three NIC are in same subnet ? could you show us the route table form this host here ?
Could we enable NLA on this server and set a proper firewall profile for each NIC that connected ? and please also enable the ICMP exception for the firewall profile we are going to bind for the NICs.
Source IP address selection on a Multi-Homed Windows Computer
http://blogs.technet.com/b/networking/archive/2009/04/24/source-ip-address-selection-on-a-multi-homed-windows-computer.aspx
Network Location Awareness (NLA) and how it relates to Windows Firewall Profiles
http://blogs.technet.com/b/networking/archive/2010/09/08/network-location-awareness-nla-and-how-it-relates-to-windows-firewall-profiles.aspx
Nobody Can Ping My Computer
http://technet.microsoft.com/en-us/library/cc749323(WS.10).aspx
Thanks.
Tiger LiTiger Li
TechNet Community Support
Free Windows Admin Tool Kit Click here and download it now
February 15th, 2012 7:18am
Hi Tiger, thanks for the reply
I have enabled NLA and Firewall. Exception rule is added. Still I am having same problem
For Questions 1.
Theaddresses we bound for each these three
NIC are in same subnet ? No. All are in different subnet.
2.
could you show us the route table form this host here ? see below
===========================================================================
Interface List
12...78 2b cb 36 07 3f ......Broadcom BCM5709C NetXtreme II GigE (NDIS VBD Client) #2
14...78 2b cb 36 07 3b ......Broadcom BCM5709C NetXtreme II GigE (NDIS VBD Client) #4
11...78 2b cb 36 07 3d ......Broadcom BCM5709C NetXtreme II GigE (NDIS VBD Client)
13...78 2b cb 36 07 39 ......Broadcom BCM5709C NetXtreme II GigE (NDIS VBD Client) #3
1...........................Software Loopback Interface 1
===========================================================================
IPv4 Route Table
===========================================================================
Active Routes:
Network Destination Netmask Gateway Interface
Metric
10.100.1.0 255.255.255.192 On-link 10.100.1.62
266
10.100.1.62 255.255.255.255 On-link 10.100.1.62
266
10.100.1.63 255.255.255.255 On-link 10.100.1.62
266
10.100.2.0 255.255.255.192 On-link 10.100.2.62
266
10.100.2.62 255.255.255.255 On-link 10.100.2.62
266
10.100.2.63 255.255.255.255 On-link 10.100.2.62
266
10.100.3.0 255.255.255.192 On-link 10.100.3.62
266
10.100.3.62 255.255.255.255 On-link 10.100.3.62
266
10.100.3.63 255.255.255.255 On-link 10.100.3.62
266
127.0.0.0 255.0.0.0 On-link
127.0.0.1 306
127.0.0.1 255.255.255.255 On-link 127.0.0.1
306
127.255.255.255 255.255.255.255 On-link 127.0.0.1 306
138.65.20.0 255.255.255.192 On-link 138.65.20.59
266
138.65.20.59 255.255.255.255 On-link 138.65.20.59 266
138.65.20.63 255.255.255.255 On-link 138.65.20.59 266
224.0.0.0 240.0.0.0 On-link
127.0.0.1 306
224.0.0.0 240.0.0.0 On-link
138.65.20.59 266
224.0.0.0 240.0.0.0 On-link
10.100.1.62 266
224.0.0.0 240.0.0.0 On-link
10.100.2.62 266
224.0.0.0 240.0.0.0 On-link
10.100.3.62 266
255.255.255.255 255.255.255.255 On-link 127.0.0.1 306
255.255.255.255 255.255.255.255 On-link 138.65.20.59 266
255.255.255.255 255.255.255.255 On-link 10.100.1.62 266
255.255.255.255 255.255.255.255 On-link 10.100.2.62 266
255.255.255.255 255.255.255.255 On-link 10.100.3.62 266
===========================================================================
Persistent Routes:
None
IPv6 Route Table
===========================================================================
Active Routes:
If Metric Network Destination Gateway
1 306 ::1/128 On-link
1 306 ff00::/8 On-link
===========================================================================
Persistent Routes:
None
February 15th, 2012 3:05pm