I have two C1720 routers whose Ethernet interfaces are on separate subnets, separated by a PIX FW. One router connects to the Internet, the other connects to a P2P circuit connecting two sites. Each site is configured similarly with two routers (one Internet and one P2P). I would like to be able to redirect Internet traffic from either site across the P2P circuit as a backup in the event of a Internet (serial) link failure.
There are several approaches that may work for you, depending upon your exact needs and whether or not you are also providing services to clients on the Internet. There is a brief discussion of various multihoming options, with and without using BGP, in one of the white papers on my web site.
At worst, you will need to get an ASN and start running BGP with both your ISPs. At best, you may be able to play games with NAT and not need to spend any money on an ASN or bother your ISPs. But a lot depends upon whether or not you can automatically detect when your link to an ISP goes down (or the ISP goes down). You may find it necessary to get a toy SOHO box which uses ping and/or http rather than a real routing protocol to detect ISP problems.
We are pleased to announce availability of Beta software for 16.6.3.
16.6.3 will be the second rebuild on the 16.6 release train targeted
towards Catalyst 9500/9400/9300/3850/3650 switching platforms. We are
looking for early feedback from customers befor...
Introduction Featured Speakers Luis Espejel is the Telecommunications
Manager of IENova, an Oil & Gas company. Currently he works with Cisco
IOS® and Cisco IOS XE platforms, and NX to some extent. He has also
worked as a Senior Engineer with the Routing P...
In this session you can learn more about Layer 3 multicast and the best
practices to identify possible threats and take security measures. It
provides an overview of basic multicast, the best security practices for
use of this technology, and recommendati...