HP SN6000C Cisco Nexus 5000 Series Switch CLI Software Configuration Guide, NX - Page 594
Switch Feature, Changes if Interoperability Is Enabled
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Switch Interoperability Chapter 43 Advanced Fibre Channel Features and Concepts Send feedback to [email protected] Table 43-2 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 43-2 Changes in Switch Operation When Interoperability Is Enabled Switch Feature Domain IDs Timers F_S_TOV D_S_TOV E_D_TOV R_A_TOV Trunking Default zone Zoning attributes Zone propagation VSAN TE ports and SAN port channel s FSPF 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. Verify that the Distributed Services Time Out Value timers match exactly. Verify that the Error Detect Time Out Value timers match exactly. Verify that the Resource Allocation Time Out Value timers match exactly. Trunking is not supported between two different vendor's switches. This feature may be disabled on a per port or per switch basis. The default zone operation of permit (all nodes can see all other nodes) or deny (all nodes are isolated when not explicitly placed in a zone) may change. Zones may be limited to the pWWN and other proprietary zoning methods (physical port number) may be eliminated. Note On a Brocade switch, use the cfgsave command to save fabric-wide zoning configuration. This command does not have any effect on Cisco Nexus 5000 Series switches if they are part of the same fabric. You must explicitly save the configuration on each Cisco Nexus 5000 Series switch. Some vendors do not pass the full zone configuration to other switches, only the active zone set gets passed. Verify that the active zone set or zone configuration has correctly propagated to the other switches in the fabric. Interop mode only affects the specified VSAN. Note Interop modes cannot be enabled on FICON-enabled VSANs. TE ports and SAN port channels cannot be used to connect Cisco switches to non-Cisco SAN switches. Only E ports can be used to connect to non-Cisco SAN switches. TE ports and SAN port channels can still be used to connect a Cisco switch to other Cisco SAN switches even when in interop mode. The routing of frames within the fabric is not changed by the introduction of interop mode. The switch continues to use src-id, dst-id, and ox-id to load balance across multiple ISL links. 43-10 Cisco Nexus 5000 Series Switch CLI Software Configuration Guide OL-16597-01
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