Configuring a separate network path for MSDP duplication and replication
You can use a different network for MSDP duplication and replication traffic rather than the one you use for MSDP backups. Both the duplication and the replication data traffic and the control traffic travel over the separate network.
This procedure describes how to use the storage servers hosts files to route the traffic onto the separate network.
The following are the prerequisites:
Both the source and the destination storage servers must have a network interface card that is dedicated to the other network.
The separate network must be operational and using the dedicated network interface cards on the source and the destination storage servers.
On UNIX MSDP storage servers, ensure that the Name Service Switch first checks the local
hostsfile for before querying the Domain Name System (DNS). See the operating system documentation for information about the Name Service Switch.
To configure a separate network path for MSDP duplication and replication
- On the source storage server, add the destination storage servers's dedicated network interface to the operating system
hostsfile. If TargetStorageServer is the name of the destination host on the network that is dedicated for duplication, the following is an example of thehostsentry in IPv4 notation:10.10.10.1 TargetStorageServer.example.com TargetStorageServer
Veritas recommends that you always use the fully qualified domain name when you specify hosts.
- On the destination storage server, add the source storage servers's dedicated network interface to the operating system
hostsfile. If SourceStorageServer is the name of the source host on the network that is dedicated for duplication, the following is an example of thehostsentry in IPv4 notation:10.80.25.66 SourceStorageServer.example.com SourceStorageServer
Veritas recommends that you always use the fully qualified domain name when specifying hosts.
- To force the changes to take effect immediately, flush the DNS cache. See the operating system documentation for how to flush the DNS cache.
- From each host, use the ping command to verify that each host resolves the name of the other host.
SourceStorageServer.example.com> ping TargetStorageServer.example.com TargetStorageServer.example.com> ping SourceStorageServer.example.com
If the ping command returns positive results, the hosts are configured for duplication and replication over the separate network.
- When you configure the target storage server, ensure that you select the host name that represents the alternate network path.