Must all servers of a multiple server BOE 3.1 cluster be on same segment ?

[Former Member]

Need help please to resolve an issue.

We are planning to build a two physical server cluster for BOE XI 3.1. For fail-over, the servers will be on 2 different remote sites. For Load Balancing, will use BigIP.

We have been told that these two servers need to be on the same segment.

Need to justify and convince the network group to put them on the same VLAN which spans multiple sites.

We cannot find any documentation/installation guides which tells us that this is needed.

1) Can you plse point me some document that specifies that the servers on the same cluster must be on the same LAN segment ?

2) As we are implementing a two server cluster for Test environment and another two server cluster for the Prod environment, can all 4 servers be on the same segment/VLAN ? We only have one VLAN spanning across multiple sites. Required that one server of the two server cluster be remote from the other.

3) We are planning to use a Load Balancer (BigIP) for the web front end to round-robin any requests to InfoView, etc. This will be implemented for Test and Prod environments.

Thanks in advance for your help.

Dickin

[BasicTek]

Our product group has stated that there is no technical reason why 2 CMS's on different segments/subnets won't run. But this would not be considered a best practice. Each CMS will make many queries to the CMS DB. If there is too much lag between one or more of the remote CMS's and the CMS DB then probblems are likely to occur.

There shouldn't be any needed broadcast info or limitation based on the actual subnet though.

That being said an optional design would be to keep the CMS's and other core processing servers together and provide a web/app on the remote segmnents. This would allow optium communication between the corba components and givce quick access to the remote users. There is no reason to seperate environments as each should be pointing to it's own cluster/CMS DB.

If you have users accessing remote sites then the load balancer may mix them up following the above config. You want to have users from remote location A hitting a web/app in that location and same with the rest.

Questions like this are always best served with a BO consultant after they review your environment and needs. The information you may get in these forums could vary greatly.

Check out the documentation on help.sap.com to get started and go from there.

Regards,

Tim