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06-14-2011 08:37 AM
06-14-2011 08:37 AM
extend subnet (maybe virtually) over WAN, possible ?
Hi,
Wondering if there is some technology/means available where-in, I could have 2 servers which are physically in 2 different data-centres, be somehow configured to share the same subnet ? Could this be possible somehow using an IP-VPN for instance ? Or some kind of a meta-VLAN ?
The underlying technology used to interconnect the 2 data-centres could be carrier-provided/leased MPLS.
Roughly speaking, here's the current physical topology...
Server-1 --- Router-1 --- WAN-Router2 --- WAN-Router3 --- Router-4 --- Server-2
where Server-1, Router-1 are in data-centre#1 using the egde-router (WAN-Router2) to connect to other data-centre hosting the other 3 nodes i.e. WAN-Router3, Router4 and Server-2.
In fact, I'd like to threat at least a pair of servers in data-centre1 and another pair in data-centre2 to be on the same subnet.
So hungup on same subnet, because there's some "IP-address" migration technology which depends on forced ARP-cache update which works only in a subnet. The IP-address (also called floating-IP) migrates from an active-machine to standby in case of failure, and all client-server reconnections happen on the unique floating-IP, which migrates to the newly elected Active node.
cheers,
BDutta
Wondering if there is some technology/means available where-in, I could have 2 servers which are physically in 2 different data-centres, be somehow configured to share the same subnet ? Could this be possible somehow using an IP-VPN for instance ? Or some kind of a meta-VLAN ?
The underlying technology used to interconnect the 2 data-centres could be carrier-provided/leased MPLS.
Roughly speaking, here's the current physical topology...
Server-1 --- Router-1 --- WAN-Router2 --- WAN-Router3 --- Router-4 --- Server-2
where Server-1, Router-1 are in data-centre#1 using the egde-router (WAN-Router2) to connect to other data-centre hosting the other 3 nodes i.e. WAN-Router3, Router4 and Server-2.
In fact, I'd like to threat at least a pair of servers in data-centre1 and another pair in data-centre2 to be on the same subnet.
So hungup on same subnet, because there's some "IP-address" migration technology which depends on forced ARP-cache update which works only in a subnet. The IP-address (also called floating-IP) migrates from an active-machine to standby in case of failure, and all client-server reconnections happen on the unique floating-IP, which migrates to the newly elected Active node.
cheers,
BDutta
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06-14-2011 09:32 AM
06-14-2011 09:32 AM
Re: extend subnet (maybe virtually) over WAN, possible ?
Just to add a bit, the Router-1 and Router-4 are connected to the servers -- Server-1 and Server-2 via an intermediate switch like Procurve E2520 (24port L2 managed switch).
The opinions expressed above are the personal opinions of the authors, not of Hewlett Packard Enterprise. By using this site, you accept the Terms of Use and Rules of Participation.
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