A10E/A28E/A28F Configuration Guide
Network Time
Protocol
(NTP)
A time synchronization protocol defined by RFC1305. It is used to
synchronize time between distributed timer server and clients. NTP is
used to perform clock synchronization on all devices in the network that
support clock. Therefore, devices can provide different applications
based on some time. In addition, NTP can ensure very high accuracy
(about 10ms).
Open Shortest
Path First
(OSPF)
An internal gateway dynamic routing protocol, which is used to decide
the route in an Autonomous System (AS).
Optical
Distribution
Frame (ODF)
A distribution connection device between the fiber and a communication
device. It is an important part of the optical transmission system. It is
mainly used for fiber splicing, optical connector installation, fiber
adjustment, additional pigtail storage, and fiber protection.
Password
Authentication
Protocol
(PAP)
A password authentication protocol of Point to Point Protocol. It is a
twice handshake protocol used for transmitting the user name and
password in a plain text.
Point-to-point
Protocol over
Ethernet
(PPPoE)
With PPPoE, the remote device can control and account each access
user.
PVLAN adopts Layer 2 isolation technology. Only the upper VLAN is
visible globally. The lower VLANs are isolated from each other. If you
partition each interface of the switch or IP DSLAM device into a lower
VLAN, all interfaces are isolated from each other.
Cable to connect device to ground, usually it is co-axial cable in yellow
and green
QinQ is (also called Stacked VLAN or Double VLAN) extended from
802.1Q, defined by IEEE 802.1ad recommendation. Basic QinQ is a
simple Layer 2 VPN tunnel technology, encapsulating outer VLAN Tag
for client private packets at carrier access end, the packets take double
VLAN Tag passing through trunk network (public network). In public
network, packets only transmit according to outer VLAN Tag, the
private VLAN Tag are transmitted as data in packets.
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