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RSCN
Multi-pid Option
If the RSCN multi-pid option is enabled, RSCNs generated to the registered Nx ports might contain more
than one affected port IDs. In this case, zoning rules are applied before putting the multiple affected port IDs
together in a single RSCN. By enabling this option, you can reduce the number of RSCNs. For example, you
have two disks (D1, D2) and a host (H) connected to switch 1. Host H is registered to receive RSCNs. D1,
D2, and H belong to the same zone. If disks D1 and D2 are online at the same time, one of the following
actions applies:
• The multi-pid option is disabled on switch 1— Two RSCNs are generated to host H: one for the disk
D1 and another for disk D2.
• The multi-pid option is enabled on switch 1—A single RSCN is generated to host H, and the RSCN
payload lists the affected port IDs (in this case, both D1 and D2).
Some Nx ports may not support multi-pid RSCN payloads. If so, disable the RSCN multi-pid option.
Note
Configuring the multi-pid Option
You can configure the multi-pid option.
Procedure
Step 1
Step 2
Suppressing Domain Format SW-RSCNs
A domain format SW-RSCN is sent whenever the local switch name or the local switch management IP
address changes. This SW-RSCN is sent to all other domains and switches over the ISLs. The remote switches
can issue GMAL and GIELN commands to the switch that initiated the domain format SW-RSCN to determine
what changed. Domain format SW-RSCNs can cause problems with some non-Cisco SAN switches.
You can suppress the transmission of these SW-RSCNs over an ISL.
Cisco Nexus 5500 Series NX-OS SAN Switching Configuration Guide, Release 7.x
192
Command or Action
configure terminal
Example:
switch# configure terminal
switch(config)#
rscn multi-pid vsan vsan-id
Example:
switch(config)# rscn multi-pid vsan 405
Managing FLOGI, Name Server, FDMI, and RSCN Databases
Purpose
Enters global configuration mode.
Sends RSCNs in a multi-pid format for
the specified VSAN.
OL-30895-01
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