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Catalyst 3750-X and 3560-X Switch Software Configuration Guide
OL-21521-01
Chapter 24 Configuring DHCP Features and IP Source Guard
Displaying IP Source Guard Information
This example shows how to enable IPSG for static hosts with IP filters on a private VLAN host port:
Switch(config)# vlan 200
Switch(config-vlan)# private-vlan primary
Switch(config-vlan)# exit
Switch(config)# vlan 201
Switch(config-vlan)# private-vlan isolated
Switch(config-vlan)# exit
Switch(config)# vlan 200
Switch(config-vlan)# private-vlan association
201
Switch(config-vlan)# exit
Switch(config)# int gigabitetherne
t1/0/3
Switch(config-if)# switchport mode
private-vlan host
Switch(config-if)# switchport priv
ate-vlan host-association 200 201
Switch(config-if)# ip device track
ing maximum 8
Switch(config-if)# ip verify sourc
e tracking
Switch# s
how ip device tracking all
IP Device Tracking = Enabled
IP Device Tracking Probe Count = 3
IP Device Tracking Probe Interval = 30
---------------------------------------------------------------------
IP Address MAC Address Vlan Interface STATE
---------------------------------------------------------------------
40.1.1.24 0000.0000.0304 200 GigabitEthernet1/0/3 ACTIVE
40.1.1.20 0000.0000.0305 200 GigabitEthernet1/0/3 ACTIVE
40.1.1.21 0000.0000.0306 200 GigabitEthernet1/0/3 ACTIVE
40.1.1.22 0000.0000.0307 200 GigabitEthernet1/0/3 ACTIVE
40.1.1.23 0000.0000.0308 200 GigabitEthernet1/0/3 ACTIVE
The output shows the five valid IP-MAC bindings that have been learned on the interface Fa0/3. For the
private VLAN cases, the bindings are associated with primary VLAN ID. So, in this example, the
primary VLAN ID, 200, is shown in the table.
Switch# show ip verify source
Interface Filter-type Filter-mode IP-address Mac-address Vlan
--------- ----------- ----------- --------------- ----------------- ----
Gi1/0/3 ip trk active 40.1.1.23 200
Gi1/0/3 ip trk active 40.1.1.24 200
Gi1/0/3 ip trk active 40.1.1.20 200
Gi1/0/3 ip trk active 40.1.1.21 200
Gi1/0/3 ip trk active 40.1.1.22 200
Gi1/0/3 ip trk active 40.1.1.23 201
Gi1/0/3 ip trk active 40.1.1.24 201
Gi1/0/3 ip trk active 40.1.1.20 201
Gi1/0/3 ip trk active 40.1.1.21 201
Gi1/0/3 ip trk active 40.1.1.22 201
The output shows that the five valid IP-MAC bindings are on both the primary and secondary VLAN.
Displaying IP Source Guard Information
Ta ble 24-3 Commands for Displaying IP Source Guard Information
Command Purpose
show ip source binding Display the IP source bindings on a switch.
show ip verify source Display the IP source guard conf
iguration on the switch.