Alcatel-Lucent 7750 SR Manual page 656

Virtual Private LAN Services
VPLS DHCP Commands
dhcp
Syntax dhcp
Context config>service>vpls>sap
config>service>vpls>spoke-sdp
config>service>vpls>mesh-sdp
Description This command enables the context to configure DHCP parameters.
lease-populate
Syntax lease-populate [nmb-of-entries]
no lease-populate
Context config>service>vpls>sap>dhcp
Description This command enables and disables dynamic host lease state management for VPLS SAPs. For
VPLS, DHCP snooping must be explicitly enabled (using the snoop command) at all points where
DHCP messages requiring snooping enter the VPLS instance (both from the DHCP server and from
the subscribers). Lease state information is extracted from snooped DHCP ACK messages to populate
lease state table entries for the SAP.
The optional number-of-entries parameter is used to define the number of lease state table entries
allowed for this SAP or IP interface. If number-of-entries is omitted, only a single entry is allowed.
Once the maximum number of entries has been reached, subsequent lease state entries are not allowed
and subsequent DHCP ACK messages are discarded.
The retained lease state information representing dynamic hosts may be used to:
Default no lease-populate
Parameters
nbr-of-entries — Specifies the number of DHCP leases allowed.
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• populate a SAP based anti-spoof filter table to provide dynamic anti-spoof filtering. If the system
is unable to populate the dynamic host information in the anti-spoof filter table on the SAP, the
DHCP ACK message must be discarded without adding a new lease state entry or updating an
existing lease state entry.
• generate dynamic ARP replies if arp-reply-agent is enabled.
Values 1 — 8000
7750 SR OS Services Guide