Configuring A Static Binding Entry; Configuring Dynamic Binding Function - 3Com 4500G Family Configuration Manual

Configuring a Static Binding Entry

Follow these steps to configure a static binding entry:
To do...
Enter system view
Enter Ethernet port view
Configure a static binding entry
The system does not support repeatedly binding a binding entry to one port, but a binding entry can
be configured to multiple ports.
In a valid binding entry, the MAC address cannot be all 0s, all Fs (a broadcast address), or a
multicast address, and the IP address can only be a Class A, Class B, or Class C address and can
be neither 127.x.x.x nor 0.0.0.0.
A static binding entry can be configured on only Ethernet ports.

Configuring Dynamic Binding Function

After the dynamic binding function is enabled on a port, IP source guard will obtain binding entries
through cooperation with DHCP protocols.
Cooperating with DHCP snooping, IP source guard will automatically obtain the DHCP snooping
entries that are generated during dynamic IP address allocation on an 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
Use the command...
system-view
interface interface-type interface-number
user-bind { ip-address ip-address |
ip-address ip-address mac-address
mac-address | mac-address mac-address }
[ vlan vlan-id ]
Use the command...
system-view
interface interface-type
interface-number
ip check source { ip-address |
ip-address mac-address |
mac-address }
1-2
Remarks
—
—
Required
No static binding entry
exists by default.
Remarks
—
—
Required
Not configured by default