We are migrating 3 servers (10.1.0.77-79) in our existing office to a collocation cage in a different physical location. We have 4 buildings connected through an AT&T OPTEMAN multipoint circuit. These 3 servers are part of 10.1.0.66 255.255.255.192 subnet. We have 20 servers on this subnet that aren't moving. We cannot change IP addresses when moved to the new location, but the gateway can change. For now only these 3 servers will be moving, in 6 months we will be moving the rest of the servers. This is a temporary fix.
I was thinking of doing this:
1. Creating an identical vlan 200 at the new site with new address (10.1.0.71).
2. Giving vlan 200 cost of 50 (ip ospf cost 50) so that route (10.1.0.66 255.255.255.192) to the old site is still preferred.
3. Create host routes for the three servers (.77-.79) at our other locations to point to the new location.
Existing site relevant 3750 config:
interface Vlan47
description OPTEMAN to B2/B3/VC
ip address 172.18.1.1 255.255.255.224
ip pim sparse-dense-mode
ip ospf network broadcast
ip ospf dead-interval 30
ip ospf mtu-ignore
interface Vlan200
description Production Server VLAN
ip address 10.10.5.1 255.255.0.0 secondary
ip address 10.1.0.66 255.255.255.192
ip directed-broadcast
ip pim sparse-dense-mode
standby version 2
standby ip 10.1.0.65
standby priority 110
standby preempt
router ospf 10
router-id 10.1.0.2
log-adjacency-changes
area 2 range 10.1.0.0 255.255.0.0
redistribute connected subnets
redistribute static subnets
network 172.18.1.0 0.0.0.31 area 2
network 192.168.2.28 0.0.0.3 area 0
default-information originate metric 5
New site relevant 3750 config:
interface Vlan47
description OPTEMAN to B1/B2/B3
ip address 172.18.1.11 255.255.255.224
ip ospf network broadcast
ip ospf dead-interval 30
ip ospf mtu-ignore
router ospf 10
router-id 10.1.6.2
log-adjacency-changes
redistribute connected subnets
redistribute static subnets
network 172.18.1.0 0.0.0.31 area 2
network 192.168.2.0 0.0.0.7 area 2
network 192.168.2.8 0.0.0.7 area 2
network 192.168.2.16 0.0.0.7 area 2
Please advise.