Alcatel-Lucent 7750 SR Manual page 1268

VPRN Service Configuration Commands
gi-address
Syntax gi-address ip-address [src-ip-addr]
no gi-address
Context config>service>vprn>if>dhcp
config>service>vprn>sub-if>dhcp
config>service>vprn>sub-if>grp-if>dhcp
Description
This command configures the gateway interface address for the DHCP relay. A subscriber interface
can include multiple group interfaces with multiple SAPs. The GI address is needed, when the router
functions as a DHCP relay, to distinguish between the different subscriber interfaces and potentially
between the group interfaces defined.
Default
no gi-address
Parameters
ip-address — Specifies the host IP address to be used for DHCP relay packets.
src-ip-address — Specifies the source IP address to be used for DHCP relay packets.
lease-populate
Syntax lease-populate [nbr-of-entries]
lease-populate [nbr-of-entries] l2-header [mac ieee-address]
no lease-populate
Context config>service>vprn>if>dhcp
config>service>vprn>sub-if>dhcp
config>service>vprn>sub-if>grp-if>dhcp
Description
This command enables dynamic host lease state management for VPLS SAPs and VPRN or IES IP
interfaces. Lease state information is extracted from snooped or relayed DHCP ACK messages to
populate lease state table entries for the SAP or IP interface.
The optional number-of-entries parameter defines the number lease state table entries allowed for this
SAP or IP interface. If number-of-entries is not specified, only a single entry is allowed. Once the
maximum number of entries has been reached, subsequent lease state entries are not allowed. If lease
state population is enabled and an entry cannot be retained in the table, the DHCP Relay or DHCP
snoop function will prevent the far-end host from receiving the DHCP ACK message.
The retained lease state information representing dynamic hosts may be used to populate a SAP based
anti-spoof filter table to provide dynamic anti-spoof filtering. Anti-spoof filtering is only available on
VPLS SAPs, IES IP interfaces terminated on a SAP or VPRN IP interfaces terminated on a SAP.
The retained lease state information representing dynamic hosts may be used to populate the system's
ARP cache based the arp-populate feature. ARP-populate functionality is only available for static and
dynamic hosts associated with IES and VPRN SAP bound IP interfaces.
The retained lease state information representing dynamic hosts may be used to populate managed
entries into a VPLS forwarding database. VPLS forwarding database population is an implicit feature
that automatically places the dynamic host's MAC address into the VPLS FDB. When a dynamic
host's MAC address is placed in the lease state table, it will automatically be populated into the VPLS
forwarding database associated with the SAP on which the host is learned. The dynamic host MAC
address will override any static MAC entries using the same MAC and prevent dynamic learning of
Page 1268 7750 SR OS Services Guide