Avaya 580 - Manual (Page 248)

8-26 User Guide for the Avaya P580 and P882 Multiservice Switches, v6.1
Chapter 8
Table 8-5. Fast Ethernet (10/100) Port Parameters
Parameter Definition
Name Enter a user configurable name for this port (possibly a
drop connection name or the name of the station or other
device connected to the port).
Category Select either User Port or Service Port.
• The User Port is intended for use with switch
connections to end user nodes.
• The Service Port is intended for use with switch
connections to servers or other switches. The
Service Port allows the switch to generate both log
messages and alarm messages (traps). The User
Port only generates log messages, preventing your
network management station from being
overwhelmed by port up/down messages that
result from users turning workstations on and off.
Speed Mode Select the speed of the port manually (to either 10 or 100
Mb/s). If auto-negotiation is enabled, this setting is
ignored.
Duplex Mode Select the port duplex mode (half- or full-duplex). If
auto-negotiation is enabled, this setting is ignored.
Flow Control Mode Determines if flow control is used on this port. For half-
duplex links, active backpressure jams the sending
Ethernet channel until the port’s buffers can receive more
packets. This prevents lost or dropped packets.
For full-duplex links, IEEE 802.3z pause control allows
the port to stop a sending station from sending more
packets if the receiving port’s buffers are full.
For TX and FX ports, there is an additional option for
Enable with Aggressive Backoff. This option limits the
size of the bursts.
Flow Control is recommended for use primarily on end-
station connections. Using this flow control on trunk
ports can cause unnecessary congestion on the network.
Auto Negotiation
Mode Select the port to auto-negotiate a speed and duplex
mode. Auto-negotiate works best when the connection
on the other end of the link is set to auto-negotiate as
well. If you set a port to auto-negotiate, and the
connection is not successful, set the port speed and
duplex mode manually.
Auto Negotiation
Speed
Advertisement Determines what information the port advertises when it
starts auto-negotiating. In most cases, 10/100 are the best
settings, but there may be cases when you want to auto-
negotiate one parameter, while keeping the other fixed.
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