RE: Redundancy with two ISPs by configuring BGP

Just put two addresses on every server on the inside. Nat the outside
address to the inside address for that particular connection. Use PBR to
make sure return traffic uses the correct interface. For redundancy purposes
put a DNS server behind each connection, and only advertise services
available via that connection out each. Use a low DNS TTL for services that
are typically persistent. Mail the MX records will handle this naturally,
DNS will handle this naturally, a web server will need the DNS cache on the
client side to time out. For egress traffic from your own clients, use GLBP
to load balance the two connections.

David

--
http://dcp.dcptech.com
-----Original Message-----
From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On Behalf Of
Alexander Lim
Sent: Friday, September 28, 2012 10:29 PM
To: Umesh Narayanan
Cc: ccielab_at_groupstudy.com
Subject: Re: Redundancy with two ISPs by configuring BGP
Use Link Load Balancer: F5 or Radware. 
Regards,
Alexander Lim
On 28 Sep, 2012, at 7:29 PM, Umesh Narayanan <umesh.narayanan_at_gmail.com>
wrote:
> Hi Guys,
> 
>   I have two public IPs (two different ISPs) and i am planning to
> configure redundancy between these IPs for my network. Here i can
configure
> HSRP or any redundany protocol but the challenge is for the mail or
> webserver where the incoming traffic towards them will face issues as the
> public IP will change.
> 
>   BGP will be an idea solution, my idea is to configure BGP multi homing
> with one set of public IPs from one ISP to be peered with the other ISP
> with private AS at our premise. Do let me if this will be an idea solution
> or pls suggest any other solutions.
> 
> Regards,
> Umesh
> 
> 
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