Dell PowerConnect B-FCXs Configuration Manual page 36

xxxvi
DHCP snooping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1349
DHCP relay agent information (DHCP Option 82) . . . . . . . . . . . . 1354
IP source guard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1360
Chapter 40 Securing SNMP Access
SNMP overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1365
Establishing SNMP community strings . . . . . . . . . . . . . . . . . . . . 1366
Using the user-based security model. . . . . . . . . . . . . . . . . . . . . . 1369
Defining SNMP views . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1373
SNMP version 3 traps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1374
How DHCP snooping works . . . . . . . . . . . . . . . . . . . . . . . . . . 1350
System reboot and the binding database . . . . . . . . . . . . . . .1351
Configuration notes and feature limitations . . . . . . . . . . . . .1351
Configuring DHCP snooping . . . . . . . . . . . . . . . . . . . . . . . . . .1351
Clearing the DHCP binding database . . . . . . . . . . . . . . . . . . 1352
Displaying DHCP snooping status and ports . . . . . . . . . . . . 1353
Displaying the DHCP snooping binding database . . . . . . . . 1353
Displaying DHCP binding entry and status. . . . . . . . . . . . . . 1353
DHCP snooping configuration example . . . . . . . . . . . . . . . . 1353
Configuration notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1355
DHCP Option 82 sub-options . . . . . . . . . . . . . . . . . . . . . . . . 1355
Configuring DHCP option 82 . . . . . . . . . . . . . . . . . . . . . . . . . 1357
Viewing information about DHCP option 82 processing . . . 1359
Configuration notes and feature limitations . . . . . . . . . . . . 1361
Enabling IP source guard on a port . . . . . . . . . . . . . . . . . . . 1362
Defining static IP source bindings . . . . . . . . . . . . . . . . . . . . 1362
Enabling IP source guard per-port-per-VLAN . . . . . . . . . . . . 1363
Enabling IP source guard on a VE . . . . . . . . . . . . . . . . . . . . . 1363
Displaying learned IP addresses. . . . . . . . . . . . . . . . . . . . . . 1363
Encryption of SNMP community strings . . . . . . . . . . . . . . . . 1366
Adding an SNMP community string . . . . . . . . . . . . . . . . . . . 1366
Displaying the SNMP community strings . . . . . . . . . . . . . . . 1368
Configuring your NMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1369
Configuring SNMP version 3 on Dell PowerConnect devices1369
Defining the engine id . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1370
Defining an SNMP group . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1370
Defining an SNMP user account. . . . . . . . . . . . . . . . . . . . . . .1371
Defining an SNMP group and specifying which
view is notified of traps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1374
Defining the UDP port for SNMP v3 traps . . . . . . . . . . . . . . 1375
Trap MIB changes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1375
Specifying an IPv6 host as an SNMP trap receiver . . . . . . . .1376
SNMP v3 over IPv6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1376
Specifying an IPv6 host as an SNMP trap receiver . . . . . . . .1376
Viewing IPv6 SNMP server addresses . . . . . . . . . . . . . . . . . .1376
PowerConnect B-Series FCX Configuration Guide
53-1002266-01