Array Performance and Data Protection
cancel
Showing results for 
Search instead for 
Did you mean: 

Does replication use the management or data network?

SOLVED
Go to solution

Does replication use the management or data network?

I can't seem to find an answer to this simple but important question about how replication in the Nimble works.   The reason I ask is that an environment I am working with doesn't have any inter-network connectivity with the iSCSI network.  Do I need to make the iSCSI network routable to the WAN connection?

7 REPLIES
etang40
Advisor
Solution

Re: Does replication use the management or data network?

Hi Marquis,

Nimble OS < 1.4.x.x strictly uses the management network to replicate data for the very reason that the iSCSI network is typically not configured to be routable across a WAN connection.

Nimble OS > 2.0.x.x will enable you to select the network to use for replication.

-Eddie

david_tan2
Valued Contributor

Re: Does replication use the management or data network?

Hi Eddie,

We are on Nimble OS 1.4.x.x and we are replicating over the data network. 10GB vs 1GB so we definitely wanted this. I know its not normally done but it can be.

Cheers

apolman45
Advisor

Re: Does replication use the management or data network?

Marquis,

This is a feature in 2.x, but can be configured by support in 1.x. We need to manually add a gateway to the data network since this isn't routed by default.


You can contact support to make this happen!


Arne

ccolht99
Advisor

Re: Does replication use the management or data network?

We have 460Gs (1.4.7) and use only one of the 2 gig interfaces for management. Can we use the other one for replication? The replication path could be all layer 2 if necessary. We have 2 data centers and own the circuits between.

rhellman18
Occasional Visitor

Re: Does replication use the management or data network?

Hi Chuck,

When both eth0 and eth1 are placed into management only mode, they become a pair of redundant interfaces.  Only one will receive an active IP address, the other will live in a "standby" state until a connectivity issue is noticed on the active interface.  At that time, the IP address will migrate (through gratuitous ARP) to the other interface.  This allows us to provide management/replication link redundancy within the controller and prevents a controller failover from occurring as a result of connectivity loss.  So, unfortunately, the answer is no.  You'll need to run replication over the same interface as management (unless you choose to switch replication over to the data network instead).

Thanks,

-rick

ccolht99
Advisor

Re: Does replication use the management or data network?

Thanks Rick. If I put the extra 1G nic in Data mode, it would need to be on the same subnet as the other 10G data nics right? I am _so_ looking forward to vlans.

rhellman18
Occasional Visitor

Re: Does replication use the management or data network?

Yes, however it's not recommended as normal data traffic will begin to traverse the 1G link in addition to the 10G links unless you're very careful (deliberate) with your host-side pathing.