Title: RE: Hypothetical BGP question

Couple of questions.

1)  What is the purpose of the like between routers C & D?  Management?
2)  Are the upstream providers the same for both routers 1 & 2?

Thanks,

Nathan

-----Original Message-----
From: Dale Holmes [mailto:[EMAIL PROTECTED]]
Sent: Monday, October 16, 2000 2:09 PM
To: [EMAIL PROTECTED]
Subject: Hypothetical BGP question


Take a look at the sketch here:

http://www.allnetllc.net/plans/bgp.gif

Disregard the screwy triangle connections to the Ethernets... each device
has only a single connection to the Ethernet networks. Something weird
happens when I save a Visio drawing as a GIF...

Routers 1A and 1B are Primary and secondary HSRP
Routers 2A and 2B are Primary and secondary HSRP

Two sites of a large Enterprise network are connected to 2 ISP's. The
company has 2 assigned public IP address blocks. They would like to
advertise 1 block from each site. The Internet routers at each of the sites
are not (and cannot be) directly connected.

Traffic from the Internet that flows into the network from Router 1A (or 1B)
must not cross the link between Router C and Router D. Traffic from the the
Internet from Router 2A (or 2B) must not cross the link between Router C and
Router D. Likewise, internal traffic destined for the Internet must get
there via the local connection to the Internet, and not by crossing the link
between Router C and D.

Here is the Question:

How many AS's are required to build this scenario (and have it work)?
Remember that all these routers and both these address blocks are under a
single administrative control...

Thanks!

Dale
[=`)

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