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athakur_us

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ISP Redundancy without BGP

How can I have internet connection to 2 different ISPs without ISP? I heard there are appliances that let you do that.
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MarkDozier

You need to clearify what you are asking. You can not connect to any iSP if you do not an account with the ISP?
You mean two ISP connections without BGP?

Try this -> http://www.fatpipeinc.com/xtreme/index.htm

This solution can only be done if the ISPs allow to update their DNS servers.
In case one has a DMZ and several services in it all these services will have to be reachable through all ISPs. This can only be achieved if the servers are listed in the ISPs DNS.

More information about the usage and the goals to be achieved would be nice.
There's a great article about doing it with Cisco routers at:
http://www.cisco.com/en/US/about/ac123/ac114/ac173/Q2-04/department_techtips.html

Snippet of the article ---------------------------------------------------------

Common Scenarios and Configurations
By Shyan Wignarajah and Asad Faruqui

One problem with static routing and policy routing has been the inability for the router to determine the state of the next hop. Routing protocols typically use "hello" mechanisms to determine if a neighbor is alive. However, policy and static routing offer no means to test whether the next hop is reachable. As a result, statically routed or policy routed packets risk being "black holed"—that unfortunate state of being forwarded to a dead neighbor.

The preferred path is via the primary Internet service provider (ISP). The cable- connected ISP provides flat rate service and higher bandwidth than the ISDN-connected ISP (which could bill on a per minute basis). However, if the primary ISP connection should fail, then the secondary ISP would be used.

So how does the CPE router determine when to use the primary ISP and when to use the secondary ISP? The Ethernet interface on the CPE router will remain up as long as it's plugged into the modem. However, there could be a problem with the cable cloud or some other part of the primary ISP's network. In order to detect these problems, the CPE router can't simply rely on the state of its own interface.

You could enable a dynamic routing protocol; however, this isn't always a viable solution, as the ISP may not be willing to run a routing protocol with you. Conversely, some customers may not want to run a routing protocol with their ISP.

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syn_ack_fin

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We just got off of Linkproofs - they were very problematic for us ... but ...
1.) They were old and obsolete and were End of Life
2.) They were over utilized - we were pushing 10Mb+ through them with 3 different ISP's and entries in the connections table in the 100K's.

We went with BGP

The Linkproof's will do the job, but they are pretty expensive.