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the Ethernet SAP. If the IP packet is multicast or broadcast, the MAC destination address must be
an appropriate multicast or broadcast MAC address.
The other procedures are similar to the case of 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 administratively 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. The value of T is configurable by user through the mac-refresh CLI
command.
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