[afnog] Load Balancing Two ISP links

[Nestor Mendy (nmendy)]

Team,
 
How about using virtualized network integrated load balancers with
security awareness?
 
Regards,
 
NM.

________________________________

From: afnog-bounces at afnog.org [mailto:afnog-bounces at afnog.org] On Behalf
Of Mike Barnard
Sent: 14 October 2007 15:54
To: ncmaina2001 at yahoo.com
Cc: afnog at afnog.org
Subject: Re: [afnog] Load Balancing Two ISP links


Hi Noa,



	I am also working on the same senario as we speak, however i
would like to share some few things with you. I also hope you are
meaning load balancing two upstream providers with a single Router. 

 
yes, i do mean load-balancing,  but i do want fail-over as well.


	First, are you considering the CPU and I/O resources given the
fact that you are planiing to utilise a single Router for both links.One
Single Router can do this job if two WAN interfaces are installed on it.

 
Yes, i have considered CPU and I/O resources for this single router.


	Just make sure each interface has its respective ip add from the
specific Provider and configure or add one "ip nat inside source ...."
statement and one default static route. After you've configured  the new
interface. 
	
	If NAT is not appropriate then you will need to consider setting
static routes pointing to each interface but rember to amke one
parmanent.

 
It is NAT for sure...


	Second, when i hear the word load balancing, some times i think
of redundancy and from the Cisco Implementation point of view, i would
Automatically suggest Two Routers and Hot Standby Routing Protocol
(HSRP) be the protocol achieving this goal. 

 
Well, i have one router, with two links coming in from two different
ISP's.


	Hope this helps. Mine seems to work but i am still fine tuning
it.

 
This does give me a pointer. This is what i have:
 
one router with two serial interfaces, each interface is configured with
a different IP address (of course) for each ISP link. Currently, i have
two routes
 
ip route 0.0.0.0 0.0.0.0 A.B.C.E
ip route 0.0.0.0 0.0.0.0 W.X.Y.Z
 
This unfortunately does not load balance and does not take into
consideration one link failing. What i am looking for is a way to have
load balancing and fail-over onthis router for these two links. 
 
Like i mentioned, i have looked at OER and it looks like what will work
for me, the catch here is that the deployment of OER requires at least
two routers. I was wondering if anyone has deployed OER on one router
and has it running and if they can give me some pointers. 
 
Thanks.
 
Regards
 

-- 
Mike

Of course, you might discount this possibility, but remember that one in
a million chances happen 99% of the time.
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