HP Intelligent Management Center v5.2 Branch Intelligent Management System Administrator Guide

direction. One peer requests the other peer to assign a specific tunnel and session ID through
these control packets. Then, using this tunnel and session ID, data packets are exchanged with
the compressed PPP frames as payload.
L2TP Relay Layer Two Tunneling Protocol over Frame Relay. A mechanism to tunnel PPP sessions independent
of the media it runs over, using virtual or switched circuits. An L2TP access concentrator (LAC)
virtually extends PPP across the Internet to an L2TP network server located on the corporate
network.
Make baseline Sets the configuration file of a common version as a baseline version. In the Configuration Backup
History list, you can set one of the backed up configuration files as the baseline version, making
the other backed up configuration file the common version. See Chapter 5, "Managing
configuration backup history."
MRU Maximum Receive Unit. The size (in bytes) of the largest messaging protocol data unit that the
communications layer can receive.
MTU Maximum Transmission Unit. The size (in bytes) of the largest messaging protocol data unit that
the communications layer can pass onwards.
NAT Network Address Translation. Improves network system security by reusing IP addresses.
Polling interval The interval at which BIMS polls the connectivity status of CPEs.
PPP Point-to-Point Protocol. PPP connections are used to connect LANs to service provider WANs, and
to connect LAN segments within an organization network.
PPPoE PPP over Ethernet. A network protocol for encapsulating PPP frames inside Ethernet frames.
TR-069 See CWMP.
130 Glossary