• Status: Solved
  • Priority: Medium
  • Security: Public
  • Views: 223
  • Last Modified:

back-up conection to internet

is it possible to have 2 network range addresses at two different isp (with different access methods to internet, two satellites or something like that), but the internet users can access the servers from my organization with the same fully qualified domain name, in case that one connection or another fails?

is it another possibility to have a total back up connection to internet?

thanks!
0
adriancristea
Asked:
adriancristea
  • 4
  • 2
1 Solution
 
hstilesCommented:
You would be unlucky if your ISP experienced a loss of service across their entire infrastructure...

As an example, we use a piece of equipment made by Ericsson, called a Colorado.  It supports both leased line a single standard rate ISDN connection.

You could set up a multilink route so that if the leased line was to go down, the device would automatically dial an ISDN number to reach the outside world.
0
 
adriancristeaAuthor Commented:
i'm still waiting for an answer with two different isp. from my knowledge it's not possible, but i hope that there is a solution.

thankx.
0
 
jnelissenCommented:
Hi,

in fact there is 1 full solution and 1 partial solution.
The full solution is that you obtain your own AS number and interface via BGP.4 to two different ISP's. This is called multihoming and is also what ISPs are using to interconnect.

The partial solution only works for incoming and outgoing email and web browsing. It does not work for access to your corporate web server. It goes as follows : you buy two routers and configure them to use VRRP (virtual router redundancy protocol), cisco's implementation is called HSRP. You connect the ethernet interface of each router to your lan and the serial interface to 2 different ISPs. In case of failure of one of the routers or the ISP's leased line your outgoing traffic will use the backup router. So web browsing and outgoing mail will always work. Incoming mail now. Incoming mail is always sent to the ip address of the server that is mentionned in your DNS zonefile as being an MX server. one can put each MX record more that one MX records with a different weight, e.g. :

mail.yourdomain.com 10 MX
mail2.yourdomain.com 20 MX

mail.yourdomain.com has an IP address of your first ISP, mail2.yourdomain.com has an IP address of your backup ISP, but in reality for you this is the same physical machine in your LAN. In this case all mail will be sent to mail.yourdomain.com via your first ISP. If connectivity via the first ISP is lost, mail will be sent to mail2.yourdomain.com.

I hope this answers your question,

Kind regards,

Jordi

P.S. I would be interested to understand whether other options are also possible.
0
Cloud Class® Course: Microsoft Office 2010

This course will introduce you to the interfaces and features of Microsoft Office 2010 Word, Excel, PowerPoint, Outlook, and Access. You will learn about the features that are shared between all products in the Office suite, as well as the new features that are product specific.

 
adriancristeaAuthor Commented:
the full solution is what i need. thank you very much.

0
 
adriancristeaAuthor Commented:
to jordi: how can i give you some points (i don't have much:400)?
0
 
jnelissenCommented:
adrian, i am happy with the 7 points as mentionned for this question. Info in obtaining your own AS number can be found at www.ripe.net if you are in Europe.
0
 
adriancristeaAuthor Commented:
i think they are 70 points. but anyway, i don't know how. i'll reload the question; you just answer (no matter what) and i'll give you the points.
0
Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

Join & Write a Comment

Featured Post

Get expert help—faster!

Need expert help—fast? Use the Help Bell for personalized assistance getting answers to your important questions.

  • 4
  • 2
Tackle projects and never again get stuck behind a technical roadblock.
Join Now