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Example
Secure DHCP Commands
clear ip dhcp snooping
c s
Syntax
Command Modes
Default
Command
History
Related
Commands
ip dhcp relay
c s
Syntax
Parameters
1332
|
Security
Figure 51-17. show ip accounting trace-lists Command Example
FTOS#show ip accounting trace-list suzanne
Trace List suzanne
seq 5 deny ip any any count (0x00 packets)
seq 10 permit tcp 10.1.1.0 /24 any count bytes (0x00 bytes)
FTOS#
DHCP as defined by RFC 2131 provides no authentication or security mechanisms. Secure DHCP is a
suite of features that protects networks that use dynamic address allocation from spoofing and attacks.
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clear ip dhcp snooping
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ip dhcp relay
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ip dhcp snooping
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ip dhcp snooping database
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ip dhcp snooping binding
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ip dhcp snooping database renew
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ip dhcp snooping trust
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ip dhcp source-address-validation
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ip dhcp snooping vlan
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show ip dhcp snooping
Clear the DHCP binding table.
clear ip dhcp snooping binding
EXEC Privilege
None
Version 7.8.1.0
Introduced on C-Series and S-Series
show ip dhcp snooping
Enable Option 82.
ip dhcp relay information-option [trust-downstream]
trust-downstream
Display the contents of the DHCP binding table.
Configure the system to trust Option 82 when it is received from the
previous-hop router.
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