harry,
what you're talking about is referred to as 'dual homing'.
the bad news for you is that you need to make sure that your IP space is
'portable' (ie: not inside of someone else's IP allocation) in order to
get your routes listed with another backbone provider. Assuming that
www.envmgr.com is on your network (which is may not be), your IP space
looks like it is PSIs and not yours.
the simple way to find out is to go to the arin page (arin.net) and click
on the 'whois' link. put in one of your ip addresses and it will tell you
if they are portable. if they are not, you can't get dual homed without
renumbering. that might sound like it's ok, but there's another
catch: arin won't hand out portable blocks smaller than /19 (8K
addresses). in order to get that many you pretty much have to show that
you have 33% of that many in use right now about will have 50% in use
within 12 months. maybe you can do that, but many organizations can't.
in which case i would suggest switching to an organization that is,
itself, dual homed. i work for a medium-sized regional ISP in new mexico
that has had two backbone connections for some time. we haven't had an
outage to both connections in over 3 years. if i were a customer of PSI,
i'd want to know about the latency and the routes disappearing and would
want to solve that problem.
good luck,
todd underwood
[EMAIL PROTECTED]
On Tue, 30 May 2000, Harry Whitehouse wrote:
> Date: Tue, 30 May 2000 16:02:45 -0700
> From: Harry Whitehouse <[EMAIL PROTECTED]>
> To: [EMAIL PROTECTED]
> Subject: OT: Multiple ISP's
>
> Please excuse this off-topic question (and feel free to recommend any better
> suited lists).
>
> My firm has a single ISP (PSINET) and reliability has been reasonable over
> the years using their T1 service. But we have periods where customers can't
> ping us, or their tracerts show severe latency problems -- perhaps once a
> week. Often we "lose" an entire geographic segment for several hours.
>
> So I'm looking at adding a distinct, redundant ISP. But I'm uncertain how
> this works.
>
> All my remote clients will be pointing to www.xyz.com. That will resolve to
> a single IP address, correct? But then how can one use multiple ISP's? I
> know this can be done, I just would like to understand how. An suppose one
> ISP's route is blocked, how does the client know to switch over to the other
> route?
>
> Also, any suggestions on the hardware needed to pull this off on the "my"
> side would be appreciated. I've seen stuff like www.FatPipeInc.com which
> seems to address this issue.
>
> TIA
>
> Harry
>
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>
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