Alcatel-Lucent 7750 SR OS Service Manual page 125

Virtual Leased Line Services
communication between CE 1 and CE 2, except that the ATM SAP and the Ethernet SAP are
cross-connected locally and IP packets do not get sent over an SDP.
A PE does not flush the ARP cache unless the SAP goes admin or operationally down. The PE
with the Ethernet SAP sends unsolicited ARP requests to refresh the ARP cache every T seconds.
ARP requests are staggered at an increasing rate if no reply is received to the first unsolicited ARP
request. T is configurable by user through the mac-refresh CLI command.
7750 SR OS Services Guide Page 125