Routing 2 subnets in Win08 R2 RRAS
Hi all, Our network have 2 subnets, 172.30.0.0/18 and 172.30.192.0/18 whereas the subnet mask is 255.255.192.0. In existing there are a Cisco router (172.30.0.254) is using to connect to Internet. One Win08 R2 server have 2 NICs which is running RRAS, one IP is 172.30.40.254 and other is 172.30.200.254. By default, all devices in network 172.30.0.0/18 cannot communicate to network 172.30.192.0/18 since they are in different subnets, however, I would like to config one device in 172.30.192.0/18 can access 172.30.0.0/18 network especially the router 172.30.0.254 because the device need to connect to Internet. How do I config the RRAS? Also, how do I add the static routing table to that one device? Thanks, Nick
February 21st, 2011 1:11pm

You do not need to add any static routes if you configure the RRAS router as a NAT router and make this NAT router the default gateway of the machine you want to give Internet access. You only need static routes if you configure the RRAS router as a normal LAN router. And the extra routing would need to be added to the CIsco, no to the RRAS router or the client machine.Bill
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February 22nd, 2011 3:53am

Hi Nikc, Thanks for posting here. Agree with bill, setting RRAS as a normal router or NAT device should the way. In additional, for static router method you may need setting static routing like below: On RRAS: Network Destination Netmask Gateway 0.0.0.0 0.0.0.0 172.30.0.254 172.30.0.0 255.255.192.0 172.30.200.254 172.30.192.0 255.255.192.0 172.30.40.254 On internet router(172.30.0.254): Network Destination Netmask Gateway 172.30.192.0 255.255.192.0 172.30.40.254 All computers where in 172.30.192.0/18 should use 172.30.40.254 as the default gateway. Meanwhile, if you want allow only one of computer where in subnet 172.30.192.0/18 could access internet through subnet 172.30.0.0/18 ,please setting packet filer on network interface of RRAS to achieve Configure Static Packet Filters http://technet.microsoft.com/en-us/library/dd469754(WS.10).aspx For more information please refer to the links below: Common Routing Scenarios http://technet.microsoft.com/en-us/library/dd469784(WS.10).aspx Manage Static Routes http://technet.microsoft.com/en-us/library/cc728272(WS.10).aspx Thanks. Tiger Li TechNet Subscriber Support in forum If you have any feedback on our support, please contact tngfb@microsoft.com Please remember to click “Mark as Answer” on the post that helps you, and to click “Unmark as Answer” if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.
February 22nd, 2011 6:32am

Hi, I already setup a RRAS and config it as a LAN router, by default, RRAS will create General and static route two services, I add the below static route in it. Interface Network Destination Netmask Gateway 172.30.200.254 172.30.0.0 255.255.192.0 172.30.40.254 172.30.40.254 172.30.192.0 255.255.192.0 172.30.200.254 However, the device 172.30.200.x cannot ping 172.30.0.x even the gateway of 172.30.200.x is set to 172.30.40.254. Have some wrong about my setting? Many thanks, Nick
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February 22nd, 2011 5:44pm

Hi Nick, Thanks for update. So is there any problem to ping 172.30.40.254 form hosts where in 172.30.192.0/18 subnet with using 172.30.200.254 as default gateway? I think incorrect route setting on RRAS is the root cause ,could you please post the full route table and “ipconfig /all” result from RRAS host here for further investigation ? Meanwhile, have you tried performing “tracert 172.30.0.254 ” form 172.30.192.0/18 subnet hosts and what’s the result ? Thanks. Tiger Li TechNet Subscriber Support in forum If you have any feedback on our support, please contact tngfb@microsoft.comPlease remember to click Mark as Answer on the post that helps you, and to click Unmark as Answer if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.
February 23rd, 2011 8:48am

Hi all, First, thanks for all your support. In existing, the RRAS is running on VM which have 2 NICs, the ping results as below: The host in 172.30.192.0/18 subnet where used 172.30.200.254 as default gateway can ping 172.30.40.254. The host in 172.30.0.0/18 subnet where used 172.30.40.254 as default gateway can ping 172.30.200.254. The host in 172.30.0.0/18 subnet where used 172.30.0.254 as default gateway cannot ping 172.30.200.254 Below is the route print and ipconfig /all in RRAS. ipconfig /all LAN 1: IP address: 172.30.200.254 Subnet Mask: 255.255.192.0 Default Gateway: DNS Server: 202.14.67.4, 202.14.67.14 LAN 2: IP address: 172.30.40.254 Subnet Mask: 255.255.192.0 Default Gateway: 172.30.0.254 DNS Server: 172.30.30.10, 172.30.40.10 route print IPv4 Route Table =========================================================================== Active Routes: Network Destination Netmask Gateway Interface Metric 0.0.0.0 0.0.0.0 172.30.0.254 172.30.40.254 266 127.0.0.0 255.0.0.0 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 127.0.0.1 306 172.30.0.0 255.255.192.0 On-link 172.30.40.254 266 172.30.40.254 255.255.255.255 On-link 172.30.40.254 266 172.30.63.255 255.255.255.255 On-link 172.30.40.254 266 172.30.192.0 255.255.192.0 On-link 172.30.200.254 266 172.30.200.254 255.255.255.255 On-link 172.30.200.254 266 172.30.255.255 255.255.255.255 On-link 172.30.200.254 266 224.0.0.0 240.0.0.0 On-link 127.0.0.1 306 224.0.0.0 240.0.0.0 On-link 172.30.200.254 266 224.0.0.0 240.0.0.0 On-link 172.30.40.254 266 255.255.255.255 255.255.255.255 On-link 127.0.0.1 306 255.255.255.255 255.255.255.255 On-link 172.30.200.254 266 255.255.255.255 255.255.255.255 On-link 172.30.40.254 266 =========================================================================== Persistent Routes: Network Address Netmask Gateway Address Metric 0.0.0.0 0.0.0.0 172.30.0.254 Default =========================================================================== Thanks, Nick
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February 23rd, 2011 10:35am

If you are using LAN routing you cannot get this working simply by making changes on the RRAS server, because that is no where the routing problem is. You have to add extra routing to the gateway router. The gateway router needs to know how it can reach the second subnet. You need to add a static route to the gateway router to send traffic for the second subnet to the RRAS router. The RRAS router can then deliver the packets to the target machines. Bill
February 23rd, 2011 12:47pm

Hi Nick, Thanks for update. Yes, you should also add a static router on internal interface (172.30.0.254) of internet gateway router, so that all traffics where destination is 172.30.192.0/18 will be sent to RRAS for route . On internet router(172.30.0.254): Network Destination Netmask Gateway 172.30.192.0 255.255.192.0 172.30.40.254 Please try and post back the result Thanks. Tiger Li TechNet Subscriber Support in forum If you have any feedback on our support, please contact tngfb@microsoft.comPlease remember to click Mark as Answer on the post that helps you, and to click Unmark as Answer if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.
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February 24th, 2011 5:37am

Hi Nick, If there is any update on this issue, please feel free to let us know. We are looking forward to your reply. Tiger Li TechNet Subscriber Support in forum If you have any feedback on our support, please contact tngfb@microsoft.comPlease remember to click Mark as Answer on the post that helps you, and to click Unmark as Answer if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.
February 26th, 2011 9:46am

Hi all, It works now, thanks for all of you. However there are still a little bit problem. Below is the devices' setting. Internet Router: IP address: 172.30.0.254 / 18 Static route: ip route 172.30.192.0 mask 255.255.192.0 172.30.40.254 RRAS: IP address: 172.30.200.254 / 172.30.40.254 Static route 1: ip route 172.30.192.0 mask 255.255.192.0 172.30.40.254 (Interface: 172.30.40.254) Static route 2: ip route 172.30.0.0 mask 255.255.192.0 172.30.200.254 (Interface: 172.30.200.254) Static route 3: ip route 0.0.0.0 0.0.0.0 172.30.0.254 (Interface: 172.30.40.254) Static route 4: ip route 0.0.0.0 0.0.0.0 172.30.0.254 (Interface: 172.30.200.254) __________________________________________________________________________________________________ CASE 1: PC 1 (Windows XP): IP address: 172.30.40.100 / 18 Gateway: 172.30.40.254 PC 2 (Windows 7): IP address: 172.30.200.100 /18 Gateway: 172.30.200.254 Apply the above settings, PC 1 and PC 2 can access Internet. However, when the PC 2 (OS is Windows 7) enabled Windows Firewall, it cannot be pinged by PC 1. I need to disable the Windows Firewall in PC 2 and then all the devices between 2 subnets can ping each others. The symptom is occurring in Windows 7 only, no any problems in Windows XP. Also on the PC2 or Windows 7 machine, when I ping to Internet such as "google.com", it sometimes show "Request timed out". However the machine can access to Internet through the web browser. ____________________________________________________________________________________________________ CASE 2: PC 1 (Windows XP): IP address: 172.30.200.100 / 18 Gateway: 172.30.200.254 PC 2 (Windows 7): IP address: 172.30.40.100 /18 Gateway: 172.30.40.254 Apply the above settings, PC 1 and PC 2 can access Internet. The PC 2 (OS is Windows 7) can be pinged by PC 1 even it enabled Windows Firewall. The PC 2 can ping to Internet such as "google.com" always and it can access to Internet through the web browser as well. What's the problem?
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February 28th, 2011 3:01pm

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