VLAN Aggregation Limitations
The following limitations apply to VLAN aggregation:
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No additional routers may be located in a subVLAN. This feature is only applicable for “leaves” of a network.
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A subVLAN cannot be a superVLAN, and vice-versa.
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SubVLANs are not assigned an IP address.
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A subVLAN should belong to only one superVLAN.
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A subVLAN or superVLAN should not be added to a private VLAN
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Before you can delete a superVLAN, you must delete all subVLANs in that superVLAN.
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When configuring a subVLAN address range, all addresses in the range must belong to the superVLAN subnet.