[c-nsp] Dual-homing without BGP

[Sergio Ramos]

Hi!

Please check this thread:
http://puck.nether.net/pipermail/cisco-nsp/2005-August/023220.html

And my entry here:
http://puck.nether.net/pipermail/cisco-nsp/2005-August/023330.html

regards,

Sergio.

-----Original Message-----
From: cisco-nsp-bounces at puck.nether.net
[mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Vincent De
Keyzer
Sent: 16 February 2006 15:55
To: cisco-nsp at puck.nether.net
Subject: [c-nsp] Dual-homing without BGP

Hello,

can you please review the following suggestion ?
 

Requirements:

*         Customer is a communications agency (i.e. more "content" than
"access").

*         They are doing serious things like e-commerce on the Internet
connection they have with provider T (like 'trusted'). It's a 2M line.

*         They have a /23 which is announced as such on the global BGP
network by provider T (although it's part of one of T's /16s)

*         They are considering to buy a second Internet link at 25 Mbps
from
provider N (like 'new'), on which they plan to do less serious things
like
video streaming.

*         They also want to have some redundancy: if T link goes down,
traffic goes out via N - but if N goes down, they don't want streaming
to
clog the limited T bandwidth, so no streaming in that case.

 

Would the following solution work?

1.       Customer have a router that would NOT run BGP (in order to
limit
investment), and that would be connected to N, T and servers LAN.

2.       N would also announce the /23 to the world.

3.       If link to T or N fails, T or N respectively stop announcing
the
/23.

4.       With a combination of PBR (which I am not too familiar with)
and
floating routes, they would control on which link traffic will go out
(based
on server source address) according to the last requirement above.

 

What do you think?

 

Vincent

 

 

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