Alcatel-Lucent 7750 SR Manual page 1252

VPRN Service Configuration Commands
local-proxy-arp
Syntax [no] local-proxy-arp
Context config>service>vprn>interface
config>service>vprn>sub-if>grp-if
Description This command enables local proxy ARP. When local proxy ARP is enabled on an IP interface, the
system responds to all ARP requests for IP addresses belonging to the subnet with its own MAC
address, and thus will become the forwarding point for all traffic between hosts in that subnet. When
local-proxy-arp is enabled, ICMP redirects on the ports associated with the service are automatically
blocked.
Default no local-proxy-arp
loopback
Syntax [no] loopback
Context config>service>vprn>interface
config>service>vprn>interface
Description
This command specifies that the associated interface is a loopback interface that has no associated
physical interface. As a result, the associated interface cannot be bound to a SAP.
When using mtrace/mstat in a Layer 3 VPN context then the configuration for the VPRN should have
a loopback address configured which has the same address as the core instance's system address (BGP
next-hop).
Default
None
mac
Syntax [no] mac ieee-mac-address
Context config>service>vprn>interface
config>service>vprn>if>vrrp
config>service>vprn>sub-if>grp-if
Description
This command assigns a specific MAC address to a VPRN IP interface.
The no form of this command returns the MAC address of the IP interface to the default value.
Default
The physical MAC address associated with the Ethernet interface that the SAP is configured on.
Parameters
ieee-mac-address — Specifies the 48-bit MAC address for the static ARP in the form
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aa:bb:cc:dd:ee:ff or aa-bb-cc-dd-ee-ff where aa, bb, cc, dd, ee and ff are hexadecimal numbers.
Allowed values are any non-broadcast, non-multicast MAC and non-IEEE reserved MAC
addresses.
7750 SR OS Services Guide