I hope I can get some help as I've been wracking my brain to figure out the best way to get a new MPLS connection set up between our main site and our DR site. I'll first give a description of what I have today and what I need to achieve. I'm also throwing in our CE interface configs to show what we have. I changed our PE ip address’ to protect the innocent. (I tried to get formatting correct for the interface info below but it's not playing nice)
Right now we have a DR site/rack in a co-location facility. The DR site has an internal gateway set exactly as the main gateway at our main site. The reason for the "duplicate" internal gateway address being the same is if we have a major meltdown at the main site (fire, etc), we can easily bring up replicated VM's at the DR site, switch over DNS at our DNS provider for our domain names and our websites can be running and available within a short amount of time (DNS replication withstanding).
Right now these 2 sites connect over the internet with a site-to-site VPN through Cisco ASA's and each side is hidden behind NATs through the site-to-site so these 2 duplicate gateways can exist and we can replicate data between sites by sending traffic to the NAT'd address' and then on to the servers behind the firewall at DR.
We just had an MPLS network installed by an ISP directly connecting each site and that's where I'm stumped.
I really need to have the easy access that we have today of all servers sitting at DR running on that duplicated gateway address because like I mentioned, in case of emergency I can just fire up VM's on a Quorum OnQ device and have a dup of my infrastructure up and running in less than an hour. But I obviously can't have the duplicated gateways running there AND here without a conflict.
What would someone suggest to look at to have these 2 sites up and running across MPLS?
(everything is /24 for sub netting)
Main site and DR site internal gateway:
Main site 2951 interface configs:
interface GigabitEthernet0/0 no ip address duplex full speed 100 interface GigabitEthernet0/0.1 encapsulation dot1Q 1801 ip address 18.104.22.168 255.255.255.252 interface GigabitEthernet0/0.2 encapsulation dot1Q 1800 ip address 22.214.171.124 255.255.255.252 interface GigabitEthernet0/2 ip address 192.168.10.251 255.255.255.0 duplex auto speed auto router bgp 7000 no synchronization bgp log-neighbor-changes redistribute connected redistribute static neighbor 126.96.36.199 remote-as 2500 no auto-summary ip default-gateway 188.8.131.52 ip forward-protocol nd
DR site 2951 interface configs:
interface GigabitEthernet0/2 ip address 192.168.10.250 255.255.255.0 duplex auto speed auto interface GigabitEthernet0/0/0 no ip address duplex full speed 100 media-type sfp interface GigabitEthernet0/0/0.1 encapsulation dot1Q 1901 ip address 184.108.40.206 255.255.255.252 interface GigabitEthernet0/0/0.2 encapsulation dot1Q 1900 ip address 220.127.116.11 255.255.255.252 router bgp 7000 bgp log-neighbor-changes redistribute connected redistribute static neighbor 18.104.22.168 remote-as 2500 ip default-gateway 22.214.171.124 ip forward-protocol nd
When we first set up the DR site, I posted a question last year on here about concerns I had with the site-to site VPN and the NATs, and it turns out because of NAT I can have the 2 gateways running simultaneously. That was great. Now, things are changing and i'm not sure of the best way to get this to work moving forward.