Allied Telesis Switchblade AT-x908 Folleto - Página 5
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The key benefits: full bandwidth utilization and
maximum availability
The key advantage of the solution comes from configuring the
links from the edge switches to the core as an 802.3ad link
aggregation. This is possible because VCS supports link
aggregation on ports across different virtual chassis members.
When these ports are aggregated:
■
The full bandwidth of the network is available as both ports are
active; no links are blocked as some would be with spanning tree.
■
There is little network disruption if a link fails.The decision within
a switch when an aggregated link fails is very simple and the
virtual chassis almost instantly adapts its data forwarding process
on the loss of the link.
This solution effectively overcomes two of the main drawbacks of
spanning tree.
Further benefits
■
Simpler network management - the virtual chassis is managed as
a single unit.
■
Layered resiliency - the dedicated stacking link is backed up by a
further resiliency link. If the stacking link fails, communication
between the stack members is maintained to enable graceful
reconfiguration.
■
Seamless integration with server-based load sharing and high
availability mechanisms.
■
The virtual chassis still supports xSTP, if required for redundancy
at the edge of the network.
■
Easier troubleshooting - each link can be dealt with separately.The
aggregated connection from an edge switch to the core virtual
chassis operates independently of the links from other edge
switches.The loss of a link in no way affects the connections to
the other edge switches.This is in contrast to spanning tree,
where the loss of any link sends a message to every other switch
in the network and can cause recalculations throughout the
network.
A superior solution
Device and path resiliency are provided as Virtual Chassis
Stacking and Link Aggregation provide a solution where network
resources are spread across the virtual chassis members.
Virtualization of the network core ensures access to information
when you need it.
With the benefits of high availability, increased capacity and ease
of management,Virtual Chassis Stacking makes networking
reliable and simple.
Allied Telesis Solutions: VCStack
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