User`s guide

256 Implementing an Open IBM SAN
By implementing such a layout, each server is attached to two zones. Since each
zone has a different ESS port as a member, the server will get exactly two paths
to the ESS. Use of pvlinks and ESS based LUN masking will enable sufficient
multipathing.
To actually implement name server zoning, click the specific fabric icon, in our
case osvl_fc64, in the navigation tree, and then select the Zoning tab as shown
in Figure 3-69.
Figure 3-69 IN-VSN: Entering the zone screen in fabric view mode
Initially, there are no zones defined at all. Remember that in such a case, the only
effective zone is the default zone. This enables all ports to communicate with all
other ports (any-to-any). Only zoned ports will have limited but controlled access.
All unzoned ports are considered as being part of the default orphan zone, which
enables them to communicate without any restrictions.