From: sakthi vadivel (sakthivadivel.ccie@gmail.com)
Date: Wed Oct 22 2008 - 13:16:05 ARST
Hi Experts,
I have Small Scenario. You guys can provide your view on this to come to a
conclusion.
I have a multi-tier scenario, which has got two routers in the WAN Edge and
the customer has got 1 set of public IP segment to host their public servers
behind the firewall. The physical layout will look like ;
(public server)Dmz---- Firewall active (ASA)---2950
switchIGW1-------internet
|FO-LINK
|Trunk
Firewall standby (ASA)---2950
Switch ___IGW2------internet
Each of the IGW (Internet Gateway) has got two inbuilt giga interfaces; one
is connected directly to the internet (MPLS) and another one connected to
the switch. No direct connection between the IGW's.
Running OSPF between these ASA's and IGW's (Broadcast Network
Type).Injecting default route on IGW's.
*My OBJECTIVE here is to achieve high availability and box level redundancy
and want to make use my both internet routers and connections.*
1. What if I am getting internet connection from same provider? Is it
possible to achieve high availability without doing any changes on the MPLS
(PE) end? My internet traffic from inside to outside and our external
traffic from outside to inside public servers
2. If my service provider is ready to configure two different gateways to my
public IP address on the PE? (One pointing to my IGW1 with Normal AD and
Another one pointing to my second IGW2 with more AD).In that case, only one
link will be used most of the time..
3. What if my ISP is ready to run any dynamic protocols between PE and CE
(IGW's)? Which one is preferred OSPF or BGP?
Is there any other options are recommendation to follow on?
Regards,
Sak
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