Displaying And Maintaining Ip Source Guard - 3Com S7906E Configuration Manual

Cooperating with DHCP snooping, IP source guard will automatically obtain the DHCP snooping
entries that are generated during dynamic IP address allocation on a Layer 2 Ethernet port.
Cooperating with DHCP Relay, IP source guard will automatically obtain the DHCP Relay entries
that are generated during dynamic IP address allocation across network segments on a VLAN
interface.
These dynamically obtained binding entries contain such information as MAC address, IP address,
VLAN tag, port information and entry type. IP source guard applies these binding entries to the port, so
that the port can filter packets according to the binding entries.
Follow these steps to configure port filtering:
To do...
Enter system view
Enter interface view
Configure dynamic binding
function
To implement dynamic binding in IP source guard, make sure that DHCP snooping or DHCP Relay
is configured and works normally. For DHCP configuration information, refer to DHCP
Configuration in the System Volume.
A port takes only the latest dynamic binding entries configured on it.

Displaying and Maintaining IP Source Guard

To do...
Display information about static
binding entries
Display information about
dynamic binding entries on a
distributed device
Display information about
dynamic binding entries on a
distributed IRF device
Use the command...
system-view
interface interface-type
interface-number
ip check source { ip-address |
ip-address mac-address |
mac-address }
Use the command...
display user-bind [ interface
interface-type interface-number
| ip-address ip-address |
mac-address mac-address ]
display ip check source
[ interface interface-type
interface-number | ip-address
ip-address | mac-address
mac-address ] [ slot
slot-number ]
display ip check source
[ interface interface-type
interface-number | ip-address
ip-address | mac-address
mac-address ] [ chassis
chassis-number slot
slot-number ]
1-3
Remarks
—
—
Required
Not configured by default
Remarks
Available in any view
Available in any view
Available in any view