554 Implementing the IBM Storwize V5000 Gen2 with IBM Spectrum Virtualize V8.1
10.6.4 VLAN support
Starting with V7.4.0, VLAN tagging is supported for both iSCSI host attachment and IP
replication. Hosts and remote-copy operations can connect to the system through Ethernet
ports. Each traffic type has different bandwidth requirements, which can interfere with each
other if they share the same IP connections. VLAN tagging creates two separate connections
on the same IP network for different types of traffic. The system supports VLAN configuration
on both IPv4 and IPv6 connections.
When the VLAN ID is configured for the IP addresses that are used for either iSCSI host
attach or IP replication, the appropriate VLAN settings on the Ethernet network and servers
must be configured correctly in order not to experience connectivity issues. After the VLANs
are configured, changes to the VLAN settings will disrupt iSCSI and IP replication traffic to
and from the partnerships.
During the VLAN configuration for each IP address, the VLAN settings for the local and
failover ports on two nodes of an I/O Group can differ. To avoid any service disruption,
switches must be configured so the failover VLANs are configured on the local switch ports
and the failover of IP addresses from a failing node to a surviving node succeeds. If failover
VLANs are not configured on the local switch ports, there are no paths to IBM Storwize V5000
Gen2 system node canisters during a node canister failure and the replication fails.
Consider the following requirements and procedures when implementing VLAN tagging:
VLAN tagging is supported for IP partnership traffic between two systems.
VLAN provides network traffic separation at the layer 2 level for Ethernet transport.
VLAN tagging by default is disabled for any IP address of a node port. You can use the CLI
or GUI to optionally set the VLAN ID for port IPs on both systems in the IP partnership.
When a VLAN ID is configured for the port IP addresses that are used in remote copy port
groups, appropriate VLAN settings on the Ethernet network must also be properly
configured to prevent connectivity issues.
Setting VLAN tags for a port is disruptive. Therefore, VLAN tagging requires that you stop the
partnership first before you configure VLAN tags. Then, restart again when the configuration
is complete.
For further information on configuring VLAN for IP replication, please see IBM Knowledge
Center for IBM Storwize V5000 at the following link:
https://ibm.biz/BdjKnA
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