07-22-2019 10:32 AM
Hello Gents,
I have two 3548 nexus switches in Data Center A
I have two 5672 nexus switches in Data Center B
What technology can I use to setup a unique gateway between those 2 Data Centers,
Thanks,
Edouard.
Solved! Go to Solution.
07-23-2019 07:43 AM
Overlay Transport Virtualization (OTV) will allow you to stretch L2 between the data centers while maintaining separate failure domains and giving exiting traffic in each VLAN its own, local gateway to leave the data center. You could control the return path of the traffic using OSPF and putting a higher cost on one path than the other with the "ip ospf cost" command.
In the solution above, I'm assuming one Data Center is active and the other is a standby, in case of a failure. In that scenario, all services have to run in one data center or the other. If you need both to be simultaneously active, then you need something like Locator/ID Separation Protocol (LISP) to solve that problem. You could still stretch the DCs with OTV or VXLAN, but wouldn't use OSPF the same way as above.
07-22-2019 01:43 PM
07-22-2019 02:51 PM
Yes, that I what I meant.
07-23-2019 07:43 AM
Overlay Transport Virtualization (OTV) will allow you to stretch L2 between the data centers while maintaining separate failure domains and giving exiting traffic in each VLAN its own, local gateway to leave the data center. You could control the return path of the traffic using OSPF and putting a higher cost on one path than the other with the "ip ospf cost" command.
In the solution above, I'm assuming one Data Center is active and the other is a standby, in case of a failure. In that scenario, all services have to run in one data center or the other. If you need both to be simultaneously active, then you need something like Locator/ID Separation Protocol (LISP) to solve that problem. You could still stretch the DCs with OTV or VXLAN, but wouldn't use OSPF the same way as above.
09-05-2019 08:57 AM
Hi Bobby,
I have now the L2 stretched between Data Centers, one active and the other standby.
How would you recommend to manage the default gateway for the servers on each Data Center. Would each DC have a different Gateway or would you do HSRP between the 4 Nexus cross each Data Center.
Thank-you,
Edouard.
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