I have 2 servers (Windows Server 2012 R2), with each having (more than) 2 network cards. I want both server to use 1 network card for "The Internet", and 1 network card to communicate directly with the other server. (There is also a 3rd server present, but I will not go into details now.)
Server 1 has public IP 63.148.179.243 (interface 14) and local IP 192.168.211.13 (interface 15)
Server 2 has public IP 63.148.179.244 and local IP 192.168.211.15
(interface 15 connected directly to Server 2)
I want the servers to communicate directly, even if I would address them via their public IP's. I assume I have to add a route like this on Server 1: route -p add 63.148.179.244/32 192.168.211.13 metric 10 if 15
But even after doing this, if I open a browser on Server 1 and I download a huge file from http://63.148.179.244/hugeFile.txt, I see that the network card that is connected to the Internet is getting the full load, and the download speed is much lower than what I would expect.
I also tried it slightly different, with no better result, using: route -p add 63.148.179.244/32 192.168.211.15 metric 10 if 15
and route -p add 63.148.179.244/32 192.168.211.13 metric 10 if 14
When adding the route, it looks like this:
C:\Windows\system32>route -p add 63.148.179.244/32 192.168.211.13 metric 10 if 15
OK!
C:\Windows\system32>route print
===========================================================================
Interface List
20...02 c5 d5 76 49 2c ......Microsoft Failover Cluster Virtual Adapter
13...94 57 a5 57 86 6d ......HP Ethernet 1Gb 4-port 331i Adapter #2
15...94 57 a5 57 86 6e ......HP Ethernet 1Gb 4-port 331i Adapter #3
14...94 57 a5 57 86 6c ......HP Ethernet 1Gb 4-port 331i Adapter
1...........................Software Loopback Interface 1
16...00 00 00 00 00 00 00 e0 Microsoft ISATAP Adapter #2
17...00 00 00 00 00 00 00 e0 Microsoft 6to4 Adapter
18...00 00 00 00 00 00 00 e0 Microsoft ISATAP Adapter #3
19...00 00 00 00 00 00 00 e0 Microsoft ISATAP Adapter #4
===========================================================================
IPv4 Route Table
===========================================================================
Active Routes:
Network Destination Netmask Gateway Interface Metric
0.0.0.0 0.0.0.0 63.148.179.241 63.148.179.243 276
63.148.179.240 255.255.255.240 On-link 63.148.179.243 276
63.148.179.242 255.255.255.255 On-link 192.168.211.12 20
63.148.179.243 255.255.255.255 On-link 63.148.179.243 276
63.148.179.244 255.255.255.255 On-link 192.168.211.13 20
63.148.179.251 255.255.255.255 On-link 63.148.179.243 276
63.148.179.252 255.255.255.255 On-link 63.148.179.243 276
63.148.179.255 255.255.255.255 On-link 63.148.179.243 276
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
192.168.211.0 255.255.255.0 On-link 192.168.211.12 266
192.168.211.0 255.255.255.0 On-link 192.168.211.13 266
192.168.211.12 255.255.255.255 On-link 192.168.211.12 266
192.168.211.13 255.255.255.255 On-link 192.168.211.13 266
192.168.211.255 255.255.255.255 On-link 192.168.211.12 266
192.168.211.255 255.255.255.255 On-link 192.168.211.13 266
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 63.148.179.243 276
224.0.0.0 240.0.0.0 On-link 192.168.211.12 266
224.0.0.0 240.0.0.0 On-link 192.168.211.13 266
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 63.148.179.243 276
255.255.255.255 255.255.255.255 On-link 192.168.211.12 266
255.255.255.255 255.255.255.255 On-link 192.168.211.13 266
===========================================================================
Persistent Routes:
Network Address Netmask Gateway Address Metric
0.0.0.0 0.0.0.0 63.148.179.241 Default
63.148.179.242 255.255.255.255 192.168.211.12 10
63.148.179.244 255.255.255.255 192.168.211.13 10
===========================================================================
IPv6 Route Table
===========================================================================
Active Routes:
If Metric Network Destination Gateway
17 1026 ::/0 2002:c058:6301::1
1 306 ::1/128 On-link
17 1025 2002::/16 On-link
17 281 2002:3e94:b3f3::3e94:b3f3/128
On-link
17 281 2002:3e94:b3fb::3e94:b3fb/128
On-link
17 281 2002:3e94:b3fc::3e94:b3fc/128
On-link
14 276 fe80::/64 On-link
13 266 fe80::/64 On-link
15 266 fe80::/64 On-link
15 266 fe80::196e:792:9b88:76d9/128
On-link
13 266 fe80::64f0:273b:28a6:72b9/128
On-link
14 276 fe80::f94d:9dfa:c394:9f82/128
On-link
1 306 ff00::/8 On-link
14 276 ff00::/8 On-link
13 266 ff00::/8 On-link
15 266 ff00::/8 On-link
===========================================================================
Persistent Routes:
None
C:\Windows\system32>
Please advise.