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Allied Telesis AT-8948 Arkusz danych
AlliedWare
| Operating System
®
BGP-4 - Border Gateway Protocol version 4
BGP-4 is an external gateway protocol which allows
two routers/switches in different routing domains,
known as Autonomous Systems to exchange routing
information.This facilitates the forwarding of data
across the border of the routing domains. BGP-4
allows routers/switches to learn multiple paths,
choose the best path for routing information and
install that path in the IP routing table.
WAN Load Balancer
The WAN load balancer enables the router to
combine bandwidth from multiple WAN
connections for increased throughput and
redundancy.When a router simultaneously connects
to multiple WANs, the WAN load balancer will
distribute the traffic based on any one of a number
of selectable balancing algorithms. A typical example
would be a router that has two Internet
connections each exchanging data to remote sites
via different Internet providers. In this case an outage
limited to one network will not result in a loss of
connectivity to these sites.
QoS - Quality of Service
QoS intelligently manages network traffic to allow
stable and predictable end-to-end network
performance. Comprehensive, low latency QoS
features operating at wire-speed provide flow-
based traffic management with full classification,
prioritization, traffic shaping and min/max
bandwidth profiles. AlliedWare's
ideal for service providers wanting to ensure
maximum availability of premium voice, video, and
data services, and at the same time manage
customer service level agreements. For enterprise
customers, QoS protects productivity by
guaranteeing performance of business-critical
applications including VoIP services, and helps to
restore and maintain responsiveness of enterprise
applications in the networked
workplace.
Multicasting
PIM - Protocol Independent Multicast
PIM has two modes: Dense Mode (PIM-DM) and
Sparse Mode (PIM-SM).
PIM-DM relies on the presence of an existing unicast
routing protocol to provide routing table data to
build up information for the multicast forwarding
database.This process is independent of the
mechanisms of the specific unicast routing protocol.
PIM-SM provides efficient communication between
members of sparsely distributed groups - the type
of groups that are most common in wide-area
internetworks. PIM-SM limits multicast traffic so
only those network devices interested in receiving
traffic for a particular group receive that traffic.
Allied Telesis
IGMPv2 - Internet Group Management Protocol
IGMP is used between hosts and multicast routers
and switches on a single physical network to
establish hosts' membership in particular multicast
groups. Multicast routers use this information, in
conjunction with a multicast routing protocol, to
support IP multicast forwarding across the Internet.
Management
GUI and SSL - Graphical User Interface and Secure
Sockets Layer
The GUI is a web-based management tool designed
for intuitive, easy-to-use device configuration and
monitoring. Its purpose is to make complicated tasks
simpler and regularly performed tasks quicker. A GUI
connection can be secured with the use of the SSL.
SSL is a security protocol that provides secure
communication by allowing the client to verify the
servers identity before either side sends any sensitive
information. SSL encrypts data to prevent a third
party from interfering with the message.
SSH - Secure Shell
Secure management is increasingly important in
modern networks, as easy, effective device
management and the need for security are two
almost universal requirements. SSH is a secure Telnet
type access that provides strong authentication and
secure communication over insecure channels. While
Telnet sends commands over the network in
plaintext, SSH sends them encrypted. With SSH, a
QoS features are
®
client can safely log into another computer over a
network, execute commands in a remote machine, or
move files from one machine to another.
Scripting
The Scripting facility allows sequences of commands
to be stored in a script and replayed at any time so
that switches can be easily and quickly configured.This
is useful when developing a complex configuration,
making the same configuration change to several
different devices or security appliances, or introducing
a configuration change that must occur at a particular
time. Scripts can be activated from the command line,
from a trigger, or when users log in.
Triggers
A trigger sets off an ordered sequence of scripts and
commands to be executed when a certain event
occurs, providing a powerful mechanism for
automating the execution of commands in response
to certain events. For example, triggers can be
configured to collect diagnostic information after a
reboot. Each trigger may reference multiple scripts
and any script can be used by any trigger.

High Availability

Link Aggregation
Link aggregation (trunking) allows a number of
individual switch ports to be combined, forming a
single logical connection of higher bandwidth.This
provides a higher performance link, and also
provides redundancy for a more reliable and
robust network.
AlliedWare
®
supports IEEE standard 802.3ad link
aggregation, which can be configured manually, or
automated via the use of Link Aggregation Control
Protocol (LACP).
LACP automatically detects multiple links between
two LACP enabled devices and configures them
to use their maximum possible bandwidth by
automatically combining the links.
VRRP - Virtual Router Redundancy Protocol
VRRP provides automatic backup in mission-critical
environments.This feature enables multiple routers
or switches to share a virtual IP address that
serves as the default LAN gateway. Should the
master fail, the other devices assume the virtual IP
address. LAN devices can continue to be
configured with a single default gateway address,
and because VRRP is a standard Internet protocol,
full interoperability with other VRRP-supported
products is assured.
EPSR – Ethernet Protection Switched Rings
Ethernet Protection Switched Rings allow several
switches to form a protected ring with sub 50ms
failover.This feature is perfect for high performance at
the core of enterprise or provider access networks.
MSTP - Multiple Spanning Tree Protocol
MSTP addresses the limitations in the existing
spanning tree protocols, Spanning Tree Protocol
(STP) and Rapid Spanning Tree Protocol (RSTP).
MSTP is similar to RSTP in that it provides loop
resolution and rapid convergence. However it also
has the significant extra advantage of making it
possible to have different forwarding paths for
different multiple spanning tree instances.This
enables load balancing of network traffic across
redundant links.
Networks using multiple VLAN topologies that
employ alternative physical links are supported by
MSTP. MSTP also supports multiple spanning tree
instances on any given link within a network and
can group bridges into 'regions' that appear as a
single bridge to other devices.
Note: Features available on individual products are
dependent on product hardware. For more
information go to www.alliedtelesis.com.
www.alliedtelesis.com