Solved

Site-to-Site VPN - Branch Offices Unable to Communicate

Posted on 2010-08-20
2
864 Views
Last Modified: 2013-12-23
I have 3 sites, 1 head office, and 2 branch offices. Head office can ping the routers & server in each branch office, and the branch offices can ping the router and server in head office, but the branch offices can't ping each others servers or routers. Each site has a domain controller, and runs a distributed file system for user data.

Head office is on IP address 192.168.5.0/24. We have 2 routers here, both Draytek 2820's. 192.168.5.1, this is for general internet access * incoming emails. Then we have the site-2-site VPN router which is 192.168.5.2 (we need 2 ADSL lines as the speed is only 500kb upload, 1mb download). The server is 192.168.5.20.

Branch office1 is 192.168.4.0/24, there is only the VPN router (Draytek 2820) which is 192.168.4.1 server is 192.168.4.20.

Branch office2 is on 192.168.0.1/24, only the VPN router (Draytek 2820) which is 192.168.0.1 server is 192.168.0.20

The default gateway at head office is the internet router, 192.168.5.1, so I have added a static route to the server, uisng 'route -p add 192.168.4.0 mask 255.255.255.0 192.168.5.2 metric 1' and the same for the 192.168.0.0 network, so it knows how to get to the other networks. The other networks both had a route added for head office, which worked, and for each other, but this didn't work!

How can I get branch office1 and branch office2 to communicate? Do I just need to create a site-2-site VPN between each of them? Would this cause a network data loop, and bring the whole network down?
0
Comment
Question by:bjblackmore
2 Comments
 
LVL 4

Accepted Solution

by:
ebooyens earned 500 total points
ID: 33483590
I would recommend getting site-to-site between branches as well as that would optimise network flow.  It won't bring the network down, just remove your static routes before you enable the new VPN and the router will handle the routing (sounds silly) between sites.  With setting up a route through head office means you're involving your head office connections unnecessarily for traffic that could just flow directly between the branches.

If you have Exchange servers at the branches for example then you could set up connectors between the two branches and e-mails between users in the branches won't need to go through head office.  Same would apply for VoIP calls if you have VoIP system, and so on.

Let us know how you get on.
0
 

Author Comment

by:bjblackmore
ID: 33483774
Hi,

Thanks for the reply.

Have setup a site-2-site VPN between the 2 branch offices, and it looks like data is flowing, and the network is still up and running!

Thanks for the advise

Ben
0

Featured Post

Free Tool: Subnet Calculator

The subnet calculator helps you design networks by taking an IP address and network mask and returning information such as network, broadcast address, and host range.

One of a set of tools we're offering as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
using BGP Attributes 2 110
Running a 2nd company from the same location 3 59
ip igmp join-group 8 43
Configure BGP 22 14
A quick step-by-step overview of installing and configuring Carbonite Server Backup.
ADCs have gained traction within the last decade, largely due to increased demand for legacy load balancing appliances to handle more advanced application delivery requirements and improve application performance.
After creating this article (http://www.experts-exchange.com/articles/23699/Setup-Mikrotik-routers-with-OSPF.html), I decided to make a video (no audio) to show you how to configure the routers and run some trace routes and pings between the 7 sites…
After creating this article (http://www.experts-exchange.com/articles/23699/Setup-Mikrotik-routers-with-OSPF.html), I decided to make a video (no audio) to show you how to configure the routers and run some trace routes and pings between the 7 sites…

821 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question