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Catalyst 6500 Series Switch Software Configuration Guide—Release 8.7
OL-8978-04
Chapter 33 Configuring DHCP Snooping and IP Source Guard
Configuring DHCP Snooping on a VLAN
Enter the show command to display the security-acl mode:
Console> (enable) show port security-acl 1/2
Port Interface Type Interface Type Interface Merge Status
config runtime runtime
----- -------------- -------------- ----------------------
1/2 port-based port-based not applicable
Config:
Port ACL name Type
----- -------------------------------- ----
1/2 dhcp IP
Runtime:
Port ACL name Type
----- -------------------------------- ----
1/2 dhcp IP
dhcp-snooping:
Port Trust Source-Guard Source-Guarded IP Addresses
----- ----------- ------------ ---------------------------
1/2 untrusted disabled
Port Binding Limit No. of Existing Bindings
----- ------------------ ------------------------
1/2 32 0
Enter the show command to verify the mapping:
Console> (enable) show security acl map config all
ACL Name Type Ports/Vlans
-------------------------------- ---- ----------------
dhcp IP 16
dhcp IP 1/2
The following example shows how to enable DHCP snooping in port-based mode with an external router
configuration. DHCP snooping ACL is mapped to the host and the DHCP server port.
Note Both the host and server ports are in port-based security ACL mode.
Console> (enable) set port security-acl 1/2 port-based
Warning: Vlan-based ACL features will be disabled on ports 1/2
ACL interface is set to port-based mode for port(s) 1/2.
Console> (enable) set port security-acl 5/2 port-based
Warning: Vlan-based ACL features will be disabled on ports 5/2
ACL interface is set to port-based mode for port(s) 5/2.
Console> (enable) set security acl map dhcp 1/2
Mapping in progress.
ACL dhcp successfully mapped to port(s) 1/2
Console> (enable) set security acl map dhcp 5/2
Mapping in progress.
ACL dhcp successfully mapped to port(s) 5/2
Enter the show command to display the security ACL mode:
Console> (enable) show port security-acl 1/2
Port Interface Type Interface Type Interface Merge Status
config runtime runtime
----- -------------- -------------- ----------------------
1/2 port-based port-based not applicable
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