SAFE: A Security Blueprint for Enterprise Networks
SAFE Layer 2 Security In-depth Version 2
Layer 2: the Weakest Link
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Catalyst 2950 Desktop Switch Software Configuration Guide – Configuring Port Security
Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide – Configuring DHCP Features
Catalyst 3550 Multilayer Switch Software Configuration Guide – Configuring Dynamic ARP Inspection
The Gobbler - A tool to audit DHCP networks
RFC 3118 – Authentication for DHCP Messages
Private VLANs
Private VLAN Catalyst Switch Support Matrix
Securing Networks with Private VLANs and VLAN Access Control Lists
Spanning-Tree Protocol Root Guard Enhancement
Spanning-Tree Protocol Enhancements using Loop Guard and BPDU Skew Detection Features
Spanning-Tree Portfast BPDU Guard Enhancement