H3C Technologies H3C Intelligent Management Center - Manual (Page 139)

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DSL Digital Subscriber Line. A class of technologies that provide Internet access by transmitting
digital data over a local telephone network. DSL implementations in BIMS may create
bridged or routed networks. In a bridged configuration, the group of subscriber computers
connects into a single subnet. It can use DHCP to provide network details, such as the IP
address to the subscriber equipment, with authentication via MAC address or an assigned
host name. It can also use PPP or PPP over Ethernet (PPPoE), while authenticating with a user
ID and password, and using Point-to-Point Protocol (PPP) mechanisms to provide network
details.
Group A set of CPEs organized according to a certain rule (such as location) for easy network
management.
L2TP Layer 2 Tunneling Protocol. Facilitates the tunneling of PPP data packets across an intervening
packet-switched network. An L2TP tunnel can extend across an entire PPP session or only
across one segment of a two-segment session. At the time of setup of an L2TP connection,
many control packets are exchanged between server and client to establish a tunnel and
session for each 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 .