Quality Of Service (Qos); Bootp And Dynamic Host Configuration Protocol (Dhcp) - Allied Telesis AT-8024 Installation Manual

Product Description
Quality of
Service (QOS)
BOOTP and
Dynamic Host
Configuration
Protocol
(DHCP)
32
The AT-8024 and AT-8024GB Fast Ethernet Switches support the IEEE
802.1p standard and Quality of Service. QoS can be important in network
environments where there are time-critical applications, such as voice
transmission or video conferencing, that can be adversely affected by
packet transfer delays.
Prior to QoS, network traffic was handled in a best-effort manner. File
transfer delays did occur, but were mostly transparent to network users.
But with the introduction of time-critical applications, packet transfer
delays can impact performance. For example, delays in packets carrying
voice transmission can result in poor audio quality.
The QoS feature was designed to address this problem. With it, Ethernet
frames can be assigned different priorities. The switch uses the priorities
when determining which frames to forward first. Frames from end-
nodes running time-critical applications can be given a high priority, and
so forwarded by the switch ahead of less time-critical frames.
These application protocols were developed to simplify network
management. They are used to automatically assign IP configuration
information to the devices on your network, such as an IP address,
subnet mask, and, in some instances, a default gateway address.
The AT-8024 and AT-8024GB Fast Ethernet Switches support these
protocols and can obtain their IP configuration information from a
BOOTP or DHCP server on your network. If you activate this feature, the
switch will seek its IP address and other IP configuration information
from a BOOTP or DHCP server on your network. Naturally, for this to
work there must be a BOOTP or DHCP server residing on your network
and you must configure the service by entering in the switch's MAC
address.
Most BOOTP and DHCP services allow you to specify how the IP address
is to be assigned to the switch. Choices are static and dynamic. If you
choose static, the server will always assign the same IP address to the
switch when the switch is reset or powered on. If you choose dynamic,
the server will assign any unused IP address that it has not already
assigned to another device.
Note
The BOOTP and DHCP option is disabled by default on the switch.