Some switches can't run more than 64 STP instances. Is this a 2900 series switch. Are you running VTP where the server may be advertising more than 64 VLANs to this switch? See the workaround below.
Error Message SPANTREE_VLAN_SW-2-MAX_INSTANCE: Platform limit of [dec] STP instances
exceeded. No instance created for [chars] (port [chars]).
Explanation This message means that the number of currently-active VLAN spanning tree instances has reached a platform-specific limit. No additional VLAN instances will be created until the number of existing instances drops below the platform limit. This message shows the smallest number of those VLANs that are unable to have STP instances created.
Recommended Action Reduce the number of currently active spanning-tree instances by either disabling some of the currently active spanning-tree instances or by deleting the VLANs associated with currently active spanning-tree instances. You need to manually enable the spanning-trees that could not be created due to limited STP instances.
We are pleased to announce availability of Beta software for 16.6.3.
16.6.3 will be the second rebuild on the 16.6 release train targeted
towards Catalyst 9500/9400/9300/3850/3650 switching platforms. We are
looking for early feedback from customers befor...
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