About Interop Mode - Cisco AP775A - Nexus Converged Network Switch 5010 Configuration Manual

Advanced Fibre Channel Features and Concepts
For more information on configuring interoperability for Cisco Nexus 5000 Series switches, see the Cisco
Note
MDS 9000 Family Switch-to-Switch Interoperability Configuration Guide

About Interop Mode

Cisco NX-OS software supports the following four interop modes:
• Mode 1— Standards-based interop mode that requires all other vendors in the fabric to be in interop
• Mode 2—Brocade native mode (Core PID 0).
• Mode 3—Brocade native mode (Core PID 1).
• Mode 4—McData native mode.
For information about configuring interop modes 2, 3, and 4, see the Cisco MDS 9000 Family Switch-to-Switch
Interoperability Configuration Guide, available at the following location:
http://www.cisco.com/en/US/docs/storage/san_switches/mds9000/interoperability/guide/intopgd.html
The following table lists the changes in switch operation when you enable interoperability mode. These
changes are specific to Cisco Nexus 5000 Series switches while in interop mode.
Table 87: Changes in Switch Operation When Interoperability Is Enabled
Switch Feature
Domain IDs
Timers
F_S_TOV
OL-16597-01
mode.
Changes if Interoperability Is Enabled
Some vendors cannot use the full range of 239
domains within a fabric.
Domain IDs are restricted to the range 97 to 127, to
accommodate McData's nominal restriction to this
same range. Domain IDs can either be static or
preferred, which operate as follows:
• Static: Cisco switches accept only one domain
ID; if a switch does not get that domain ID it
isolates itself from the fabric.
• Preferred: If the switch does not get its
requested domain ID, it accepts any assigned
domain ID.
All Fibre Channel timers must be the same on all
switches as these values are exchanged by E ports
when establishing an ISL. The timers are F_S_TOV,
D_S_TOV, E_D_TOV, and R_A_TOV.
Verify that the Fabric Stability Time Out Value timers
match exactly.
Cisco Nexus 5000 Series Switch CLI Software Configuration Guide
About Interop Mode
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