Re: Redundancy with two ISPs by configuring BGP

look into GSLB/GTM, etc. for ingress traffic
LOW TTL is important as well as you don't want to wait 24+ hours (usually
few hours) for propagation to complete

On Fri, Sep 28, 2012 at 10:42 PM, David Prall <dcp_at_dcptech.com> wrote:

> 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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