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Aruba CX - VSX - VSX split optimization, if a server connection to both members uses no lacp

 Aruba CX - VSX - VSX split optimization, if a server connection to both members uses no lacp

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		- on secondary member you can use command "shutdown-on-split"

			L2 or L3 Pyhsical port which is not member of VSX lag (mlag)

		- 8325-2(config)# interface 1/1/37

			8325-2(config-if)# vsx

			shutdown-on-split Configure to shutdown the interface on VSX split

			8325-2(config-if)# vsx shutdown-on-split

			

	hints: 

	-- VSX split and uptime optimization by avoiding connectivity through VSX secondary during split. This command has no effect on the VSX primary switch during a VSX split.

	-- In most cases, this feature is not needed. In very specific cases, for single-homed active connection:

	---- Identify the port that must be torn down during VSX split or linkup-delay phase after reboot.



	documenation:

	- VSX Configuration Best Practices, Revision 2.0 – June 2025, page 43



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# When connecting a server using non-LACP (Static/Active-Backup or Active-Active with manual configuration) to an Aruba CX VSX pair,

# special consideration is needed for VSX split scenarios to avoid traffic loops and blackholes.

# Because the server does not run LACP, the switches cannot signal that the other peer is down, making proper configuration of VSX

#  split-recovery and port-shutdown policies critical. 

# 

# Key Optimization Strategies (No LACP)

#  Implement vsx-shutdown-on-split: When the Inter-Switch Link (ISL) fails, the secondary switch must shut down its member ports 

#  of the server-connected LAG. Without LACP, the server cannot detect that its connection to one switch is invalid. 

# Using vsx-shutdown-on-split on the server-facing interfaces or LAGs prevents the secondary switch from creating a traffic blackhole.

# 

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Aruba CX - VSX - VSX split optimization, if a server connection to both members uses no lacp