LevelOne GEL-1061, User Manual

Page: 311 / 500

Chapter 12
| Security Measures
IPv4 Source Guard
– 311 –
Configuring
Static Bindings
for IPv4 Source Guard
Use the Security > IP Source Guard > Static Binding (Configure ACL Table and
Configure MAC Table) pages 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
◆
Table entries include a MAC address, IP address, lease time, entry type (Static-IP-
SG-Binding, Dynamic-DHCP-Binding), VLAN identifier, and port identifier.
◆
Static addresses entered in the source guard binding table are automatically
configured with an infinite lease time.
◆
When source guard is enabled, traffic is filtered based upon dynamic entries
learned via DHCP snooping, or static addresses configured in the source guard
binding table.
◆
An entry with same MAC address and a different VLAN ID cannot be added to
the binding table.
◆
Static bindings are processed as follows:
■
A valid static IP source guard entry will be added to the binding table in
ACL mode if one of the following conditions is true:
■
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.
■
A valid static IP source guard entry will be added to the binding table in
MAC mode if one of the following conditions are true:
■
If there is no binding entry with the same IP address and MAC address,
a new entry will be added to the binding table using the type of static
IP source guard binding entry.
■
If there is a binding entry with same IP address and MAC address, then
the new entry shall replace the old one.
■
Only unicast addresses are accepted for static bindings.