interoperability mode:yes [verify mode]
loadbalancing:src-id/dst-id/oxid
operational state:up
MDS9509# show fcdomain vsan 1
The local switch is a Subordinated Switch.
Local switch run time information:
State: Stable
Local switch WWN: 20:01:00:05:30:00:51:1f
Running fabric name: 10:00:00:60:69:22:32:91
Running priority: 128
Current domain ID: 0x64(100) [verify domain id]
Local switch configuration information:
State: Enabled
Auto-reconfiguration: Disabled
Contiguous-allocation: Disabled
Configured fabric name: 41:6e:64:69:61:6d:6f:21
Configured priority: 128
Configured domain ID: 0x64(100) (preferred)
Principal switch run time information:
Running priority: 2
Interface Role RCF-reject
---------------- ------------- ------------
fc2/1 Downstream Disabled
fc2/2 Downstream Disabled
fc2/7 Upstream Disabled
Expected behavior from Fibre Channel services
While in interoperability mode, some of the Fibre Channel services from each of the switch types
might not work as in native mode. However, the following behavior is expected in an interoperating
fabric.
• Zoning: All zones will be defined with port WWNs only. Therefore, each switch type implements
zoning in its native form as if only port WWNs were used. Other types of zoning definition are
not supported.
• FSPF: The routing of frames within the fabric is not changed by the introduction of interoperability
mode. However, the MDS-9000 will continue to use src-id/dst-id/ox-id to load balance across
multiple ISL links, and B-series will use their default src-id/dst-id. Therefore, the return route can
be different from the initial route when passing through an MDS-9000.
• Trunking/Port-channels: Trunking and Port-channels continue to work between C-series switches.
See Table 1 for details.
• Domain IDs: A switch may have to change its domain ID to the range 97–127. This is to accom-
modate the 32 domain address limitation followed by some vendors. If a domain ID is changed
(which can be a disruptive event to the switch), all devices attached to the switch must re-login to
the switch. When domain IDs are changed, the switch itself must reregister with the principal
switch in the fabric to verify domain ID uniqueness.
• Disruptive: This is a switch-wide event on B-series and requires disabling the switch temporarily.
Be sure to plan accordingly when changing the domain ID.
• Non-Disruptive: This event is limited to the VSAN on C-series where the change is taking place.
The MDS switch can perform this action, as the domain manager process for this VSAN is re-
started and not the entire switch. This still requires any devices logged into the VSAN on that
switch to relogin to obtain a new FCID.
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