Black Box LGB6026A, Руководство по управлению

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C
HAPTER
30 | General Security Measures
DHCP Snooping
Syst m Auth Control : Enabled
Port Status Authenticated Host Count
---- ------ ------------------------
1/ 1 Disabled 0
1/ 2 Enabled 8
1/ 3 Disabled 0
1/ 4 Disabled 0
1/ 5 Disabled 0
.
show web-auth
summary
This command displays a summary of web authentication port parameters
and statistics.
C
OMMAND
M
ODE
Privileged Exec
E
XAMPLE
Console#show web-auth summary
Global Web-Auth Parameters
e
DHCP S
NOOPING
DHCP snooping allows a switch to protect a network from rogue DHCP
servers or other devices which send port-related information to a DHCP
server. This information can be useful in tracking an IP address back to a
physical port. This section describes commands used to configure DHCP
snooping.
Table 76: DHCP Snooping Commands
Command Function Mode
ip dhcp snooping Enables DHCP snooping globally GC
ip dhcp snooping database
flash
Writes all dynamically learned snooping entries to
GC
flash memory
ip dhcp snooping
information option
Enables or disables DHCP Option 82 information GC
relay
ip dhcp snooping
information policy
Sets the information option policy for DHCP client GC
packets that include Option 82 information
ip dhcp snooping verify
mac-address
Verifies the client’s hardware address stored in the GC
DHCP packet against the source MAC address in
the Ethernet header
ip dhcp snooping vlan Enables DHCP snooping on the specified VLAN GC
ip dhcp snooping trust Configures the specified interface as trusted IC
clear ip dhcp snooping
database flash
Removes all dynamically learned snooping entries
PE
from flash memory.
show ip dhcp snooping Shows the DHCP snooping configuration settings PE
show ip dhcp snooping
binding
Shows the DHCP snooping binding table entries PE