From: Scot Peter (scotsman@rediffmail.com)
Date: Wed Dec 18 2002 - 08:25:08 GMT-3
Hi There,
I have the following Internet VPN scenario, where I have 2
Internet circuits from 2 Different ISPs(Dedicated Leased
circuits).
Requirements:
1) I need to load balance between two ISPs
2) OSPF will be used as the routing protocol inside the firewall
through GRE tunnels
3) 1Mbps connection from each ISP
4) Applications running over the VPN requires 20 Kbps per session
(SQL based application), there are 25 such concurrent sessions run
over VPN.
My questions:
1) Is this a standard design for dualhoming to the internet. If
yes, then how internet routing happen with two different ISPs?
2) Di I need to run EBGP sessions with each ISP? then, For
implementing this kind of configuration, do I need to have a
separate AS number at each location?
3) Is there any performance degradation if I use GRE+IPSec over
Internet.
4) Can I run SMS over VPN (With NAT)
Site-A LAN (UK)
Firewall
Switch
/ \
/ \
R1 R2
/ \
ISP1 ISP2
Site-B LAN (USA)
Firewall
Switch
/ \
R1 R2
/ \
ISP1 ISP2
Possible suggestions are highly appreciated.
Thanks in Advance.
Peter
.
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