The T1's are from different providers, Qwest and Sprint.  And no we will not
be running BGP...


""Troy Leliard""  wrote in message
news:[EMAIL PROTECTED]
> First big question, are your T1's from the same provider, or from a
> different provider, and thus different "public" ip address space?  If it
is
> from a different provider, you may well run into some problems with NAT.
>
> Say for example, client A connects to your webserver (via ISP A's public
IP
> address that is assigned to you, say x.x.x.x) which is then Nat'd to your
> internal RFC1918 address  That will work all fine and dandy, but what
about
> if your default gateway is ISP B's T1.  Outbound packets, returning to
> Client A, will be NAT'd to ISB B's outside address, say y.y.y.y.  If
Client
> A is behind a stateful firewall, return packets will be dropped, as it
will
> have ISP B's SRC address, and it will be expecting ISP A's.
>
> There are a number of ways around this, but I will wait for more detauls
> before going on.  Presumably you are not / will not be running BGP, and
have
> your own AS?
>
> Terry Oldham wrote:
> >
> > Hello all,
> >
> >      I am attempting to setup a Cisco 1721 Router with load
> > balancing and
> > NAT so that we can provide a dual T1 connection to the network.
> > This is the
> > first time I have done anything like this and I was wanting to
> > know if
> > anyone had any good pointers they could give me or any commands
> > that I
> > should beware of or add.
> >
> > Thanks,
> >
> > Terry O




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