OSPF and BGP Redistribution

I have 3 sites connected via MPLS and currently we are relying on static
routes. Moving forward, we will be introducing OSPF internally and then
redistirbute OSPF-BGP. The main site and the Colo has a primary circuit
MAN/WAN Layer II ethernet handoff and backed by MPLS. The third site has a
MPLS as a primary circuit and later on we will be configuring site-to-site
VPN for the backup. I am going to design this in the following phases, and
need experts in the forum to provide any suggestions.

In first, phase I am going to configure OSPF between two locations that are
connected via Ethernet Hand off (100MB). In 2nd phase, I will confiugre
MPLS/BGP since this connectivity is only for the back up if the primary
connection goes down.

I have two sites. Main site has Cisco 4500 layer III switch and the Colo
has Cisco 3560 Layer III Swith with the following VLANs.

Interface vlan 2

ip address 10.2.2.1/24 connects to the Ethernet Hands off circuit to colo

interface vlan 3

ip address 10.41.1.1/24 (Server Farm)

Interface Vlan 4

ip address 10.42.1.1/24 (Users)

Interface Vlan 5-11 connect to different resources

Colo Site:

Interface Vlan 2

ip address 10.2.2.2/24-----connects to the Main site through Ethernet
Circuit

interface vlan 2

ip address 10.21.1.1/24 (Server Farm)

Here is what I will do:

I will put ip subnet (10.2.2.0/24) connection between two sites in OSPF
area 0

For all the VLANs in Main site will put on OSPF area 1

For all the VLANs in Colo will put on OSPF area 2

Later, when I enable OSPF between each site internal switch and MPLS
router, and do two-way redistribution, should I put those interface on both
sites of the MPLS circuit in a different area such as AREA 3 for the main
site, and AREA 4 for the Colo or shoud they be part of AREA 0 or I can just
put in the same LAN AREA 1 for the main site AREA 2 for the Colo.

Any feedback will be appreciated.

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Received on Mon Jan 23 2012 - 10:40:41 ART