The easiest way to do the job, given that all you want is the ability to switch between which ISP inside users will use for their Internet access, is to run BGP from the 6500 to each of your ISPs. The only "trick" is to get the two ISPs to agree to the same "private" ASN for you to use. No need to get a real ASN (they cost money) and you only need to accept a default route from each, so no memory limitations.
There is no problem running BGP through a PIX, and if you handle it correctly, even your security people will probably agree there is negligible reduction in security. See the "Redundant Firewall" whitepaper on my web site for what ports to open and how to use BGP through a NAT box.
You would actually be better off with a router at each site doing the BGP (and that way, you could even work with ISP specific private ASNs. The trick is to make sure that as long as both ISP links are up, all users will always use a specific ISP and never change unless there is a failure. Every time a user switches ISPs, all connections will be broken and need to be reestablished. Not a problem when surfing (just hit the refresh button), but could be painful if it happens in the middle of a big file download or during a movie or if using a VPN or other persistent connection.
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...