IP Source Guard Commands 4

is static IP source guard binding, static DHCP snooping binding or dynamic DHCP snooping binding, the packet will be forwarded.

-If IP source guard if enabled on an interface for which IP source bindings (dynamically learned via DHCP snooping or manually configured) are not yet configured, the switch will drop all IP traffic on that port, except for DHCP packets.

Example

This example enables IP source guard on port 5.

Console(config)#interface ethernet 1/5

Console(config-if)#ip source-guard sip

Console(config-if)#

Related Commands

ip source-guard binding (4-229) ip dhcp snooping (4-231)

ip dhcp snooping vlan (4-233)

ip source-guard binding

This command adds a static address to the source-guard binding table. Use the no form to remove a static entry.

Syntax

ip source-guard binding mac-address vlan vlan-id ip-address interface ethernet unit/port

no ip source-guard binding mac-addressvlan vlan-id

mac-address- A valid unicast MAC address.

vlan-id- ID of a configured VLAN (Range: 1-4094)

ip-address- A valid unicast IP address, including classful types A, B or C.

unit - Stack unit. (Always unit 1)

port - Port number. (Range: 1-28)

Default Setting

No configured entries

Command Mode

Global Configuration

Command Usage

Table entries include a MAC address, IP address, lease time, entry type (Static-IP-SG-Binding, Dynamic-DHCP-Binding, Static-DHCP-Binding), VLAN identifier, and port identifier.

All static entries are configured with an infinite lease time, which is indicated with a value of zero by the show ip source-guardcommand (page 4-230).

When source guard is enabled, traffic is filtered based upon dynamic entries learned via DHCP snooping, static entries configured in the DHCP snooping

4-229

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SMC Networks SMC8150L2 manual Ip source-guard binding, This example enables IP source guard on port, No configured entries