Avaya G430, Руководство пользователя

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Summary of port mirroring commands
For more information about these commands, see the Avaya Branch Gateways G250 and
G350 CLI Reference .
For more information about these commands, see the Avaya Branch Gateway G430 CLI
Reference .
Command Description
clear port mirror Delete a port mirroring pair
set port mirror Define a port mirroring source-destination pair
show port mirror
Display mirroring information for a specified port or for
all ports
•
auto.
Attempts to automatically detect the port’s connection type.
Spanning tree
Branch Gateways support the enhanced Rapid Spanning Tree Protocol (802.1w). The 802.1w
standard is a faster and more sophisticated version of the 802.1d (STP) standard, and includes
backward compatibility with 802.1d. Spanning tree makes it possible to recover connectivity
after an outage within approximately a minute. RSTP, with its “rapid” algorithm, can usually
restore connectivity to a network where a backbone link has failed in much less time.
Related topics:
Spanning tree protocol on page 338
Spanning tree per port on page 339
Rapid Spanning Tree Protocol (RSTP) on page 339
Spanning tree configuration examples on page 341
Summary of spanning tree commands on page 342
Spanning tree protocol
The spanning tree algorithm ensures the existence of a loop-free topology in networks that
contain parallel bridges. A loop occurs when there are alternate routes between hosts. If there
is a loop in an extended network, bridges may forward traffic indefinitely, which can result in
increased traffic and degradation in network performance.
The spanning tree algorithm produces a logical tree topology out of any arrangement of
bridges. The result is a single path between any two end stations on an extended network. In
addition, the spanning tree algorithm provides a high degree of fault tolerance. It allows the
Advanced switching
338 Administering Avaya G430 Branch Gateway October 2013
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