By default, the core isolation feature is enabled. When all the core interfaces between the Leaf and Spine nodes go down, the ESI interface will be made down. If the core isolation feature is disabled using this command, the ESI interface will not be made down, and then all the core interfaces between the Leaf and the Spine nodes go down.
Parameter descriptions - no-core-isolation – It disables core isolation functionality.
EVPN mode.
By default, the core isolation feature is enabled. When all the core interfaces between the Leaf and Spine nodes go down, the ESI interface will be made down. If the core isolation feature is disabled using this command, the ESI interface will not be made down, and then all the core interfaces between the Leaf and the Spine nodes go down.
The following example enables the no-core-isolation and disables the core isolation functionality.
SLX(config)# evpn default SLX(config-evpn-default)# no-core-isolation