A、map the Layer 2 VLAN number to the Layer 3 subnet
B、control route propagation to edge switches using distribute lists
C、use a Layer 2 distribution interconnection link with HSRP or GLBP
D、use a Layer 3 distribution interconnection link with HSRP or GLBP
E、use equal-cost Layer 3 load balancing on all links to limit the scope of queries in EIGRP
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