Cisco Systems GLBP for our WAN HA solution

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Subject Author Date
GLBP for our WAN HA solution bensonlei 08-14-07
Posted by on August 14, 2007, 5:50 am
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Hi, all,

I have a network infrastructure which has the central office and three
remote offices, they are linked together by site-to-site VPNs ( set up
with Cisco PIX ).

we are going to set up the WAN HA solution in central office which
will use three internet lines from three different ISPs.

Shall we purchase three Cisco Routers ( for ISP lines ) in Central
office to build up a GLBP network :
1. each remote office will set up three site-to-site VPNs ( each for
each ISP ) linking to central
office to form the failover/load-sharing
2. in central office, a PIX failover system behind the routers; the
PIx failover system is the same
subnet with LAN


I would like to know if the above infrastructure is practical ? does
the above system achieve the bandwidth sharing and failover for WAN ?

Thank you so much for your input


Posted by J.Cottingim on August 15, 2007, 1:16 am
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On Aug 14, 4:50 am, benson...@yahoo.com.hk wrote:
> Hi, all,
>
> I have a network infrastructure which has the central office and three
> remote offices, they are linked together by site-to-site VPNs ( set up
> with Cisco PIX ).
>
> we are going to set up the WAN HA solution in central office which
> will use three internet lines from three different ISPs.
>
> Shall we purchase three Cisco Routers ( for ISP lines ) in Central
> office to build up a GLBP network :
> 1. each remote office will set up three site-to-site VPNs ( each for
> each ISP ) linking to central
> office to form the failover/load-sharing
> 2. in central office, a PIX failover system behind the routers; the
> PIx failover system is the same
> subnet with LAN
>
> I would like to know if the above infrastructure is practical ? does
> the above system achieve the bandwidth sharing and failover for WAN ?
>
> Thank you so much for your input

Benson,
I'm going to assume you are not only going to be using eBGP, but iBGP
as well.
I don't believe it would be a good idea to set up 3 separate VPN's per
site. - one would probably be sufficient.
If you set up more than one to each location, you'd have to set up
some pretty tricky routing to make it work.
I would suggest setting up two PIX's at the home office for HA. This
would allow for an easier configuration and routing.

Just a thought, why three ISP's - two is usually enough.

Good Luck
JC


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