Chapter 12
| Security Measures
IP Source Guard
– 343 –
Configuring
Static Bindings for
IP Source Guard
Use the Security > IP Source Guard > Static Configuration page to bind a static
address to a port. Table entries include a MAC address, IP address, lease time, entry
type (Static, Dynamic), VLAN identifier, and port identifier. All static entries are
configured with an infinite lease time, which is indicated with a value of zero in the
table.
Command Usage
◆ Static addresses entered in the source guard binding table are automatically
configured with an infinite lease time. Dynamic entries learned via DHCP
snooping are configured by the DHCP server itself.
◆ Static bindings are processed as follows:
■
If there is no entry with the same VLAN ID and MAC address, a new entry is
added to the binding table using the type “static IP source guard binding.”
■
If there is an entry with the same VLAN ID and MAC address, and the type of
entry is static IP source guard binding, then the new entry will replace the
old one.
■
If there is an entry with the same VLAN ID and MAC address, and the type of
the entry is dynamic DHCP snooping binding, then the new entry will
replace the old one and the entry type will be changed to static IP source
guard binding.
■
Only unicast addresses are accepted for static bindings.
Parameters
These parameters are displayed:
Add
◆ Port – The port to which a static entry is bound.
◆ VLAN – ID of a configured VLAN (Range: 1-4094)
◆ MAC Address – A valid unicast MAC address.
◆ IP Address – A valid unicast IP address, including classful types A, B or C.
Show
◆ VLAN – VLAN to which this entry is bound.
◆ MAC Address – Physical address associated with the entry.
◆ Interface – The port to which this entry is bound.
◆ IP Address – IP address corresponding to the client.
◆ Lease Time – The time for which this IP address is leased to the client. (This
value is zero for all static addresses.)
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