Verifying That IP Source Guard Is Working Correctly
Purpose
Verify that IP source guard is enabled and is mitigating the effects of any source IP spoofing attacks on the EX Series switch.
Action
Display the IP source guard database.
user@switch> show ip-source-guard IP source guard information: Interface Tag IP Address MAC Address VLAN ge-0/0/12.0 0 10.10.10.7 00:30:48:92:A5:9D vlan100 ge-0/0/13.0 0 10.10.10.9 00:30:48:8D:01:3D vlan100 ge—0/0/13.0 100 * * voice
Meaning
The IP source guard database table contains the VLANs enabled for IP source guard, the untrusted access interfaces on those VLANs, the VLAN 802.1Q tag IDs if there are any, and the IP addresses and MAC addresses that are bound to one another. If a switch interface is associated with multiple VLANs and some of those VLANs are enabled for IP source guard and others are not, the VLANs that are not enabled for IP source guard have a star (*) in the IP Address and MAC Address fields. See the entry for the voice VLAN in the preceding sample output.