Dell PowerConnect 7048P User Manual - Page 62
DHCP Snooping, Dynamic ARP Inspection, Protected Ports (Private VLAN Edge)
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Page 62 highlights
DHCP Snooping DHCP Snooping is a security feature that monitors DHCP messages between a DHCP client and DHCP server. It filters harmful DHCP messages and builds a bindings database of (MAC address, IP address, VLAN ID, port) tuples that are specified as authorized. DHCP snooping can be enabled globally and on specific VLANs. Ports within the VLAN can be configured to be trusted or untrusted. DHCP servers must be reached through trusted ports. For information about configuring DHCP Snooping, see "Snooping and Inspecting Traffic" on page 781. Dynamic ARP Inspection Dynamic ARP Inspection (DAI) is a security feature that rejects invalid and malicious ARP packets. The feature prevents a class of man-in-the-middle attacks, where an unfriendly station intercepts traffic for other stations by poisoning the ARP caches of its unsuspecting neighbors. The malicious station sends ARP requests or responses mapping another station's IP address to its own MAC address. Dynamic ARP Inspection relies on DHCP Snooping. For information about configuring DAI, see "Snooping and Inspecting Traffic" on page 781. Protected Ports (Private VLAN Edge) Private VLAN Edge (PVE) ports are a Layer 2 security feature that provides port-based security between ports that are members of the same VLAN. It is an extension of the common VLAN. Traffic from protected ports is sent only to the uplink ports and cannot be sent to other ports within the VLAN. For information about configuring IPSG, see "Configuring Port-Based Traffic Control" on page 687. 62 Switch Features
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1,203
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1,204
-
1,205
-
1,206
-
1,207
-
1,208
-
1,209
-
1,210
-
1,211
-
1,212
-
1,213
-
1,214
-
1,215
-
1,216
-
1,217
-
1,218
-
1,219
-
1,220
-
1,221
-
1,222
-
1,223
-
1,224
-
1,225
-
1,226
-
1,227
-
1,228
-
1,229
-
1,230
-
1,231
-
1,232
-
1,233
-
1,234