Dual homing, BGP4 questions--I need help

Tue Jul 22 00:16:39 UTC 1997

If you plan on using firewalls, and you probably do, then you may need
symmetric routing. Not so hard with multiple network addresses.  For
dynamic failover you'll be stuck with AS path padding (do you have your
own AS#?) which hasn't been too effective for us (like pushing on a
string.)

netops wrote:
I'm charged with the task of finding out about dual homing and BGP4. We

> currently have a reliable internet connection with our ISP, but are
> looking to sign up another ISP for redundancy. Can anyone help me
> figure
> out how to maximize redundancy with BGP4? For instance, what kind of
> questions should I be asking a potential second ISP?
>
> Am I on the right track if I insist that the second ISP is coming into
>
> our router from a different fiber line than our current ISP? If so,
> how
> much more in-depth can I get to make sure that the second ISP is as
> "different" from our current one (eliminating single points of
> failure).
> If ANYONE can help me wrestle with this dual homing issue (I'm very
> new
> at all this), I would really appreciate it!
>
> Thanks!
> Lincoln Silver
> FlyCast Communications Corporation
> www.flycast.com
> 123 Townsend Street, Suite 226
> San Francisco, CA 94107
> (415) 975-5374