Lucent Technologies P550 - Manual (Page 56)

Configuring the Cajun P550 Switch (Layer 2 & Layer 3)
3 -10 Cajun P550/P220 Switch Operation Guide
8. From the Speed Mode pull-down menu, select a speed (10 Mb/s or 100 Mb/s) if
you want to set the port speed manually. If you set the port to auto-negotiate, this
setting is ignored. (This feature is only available for 10/10 TX).
9. From the Duplex Mode pull-down menu, select a mode (Half-duplex or
Full-duplex) if you want to set the port’s duplex mode manually. If you set the port
to auto-negotiate, this setting is ignored.
10. From the Flow Control Mode pull-down menu, select Enable if you want this
port to use Flow Control to prevent buffer overflows. Disable this feature only
when flow control is causing congestion in other areas of the network.
11. From the Auto Negotiation Mode pull-down menu, select Enable. (This feature
is only available for 10/10 TX).
Note: This feature works best when the port or device on the other end of the
connection auto-negotiates as well. If you are having problems with
auto-negotiating connections, try setting the modes manually using the
command line interface. For example,
set port auto 7/3 enable .
12. From the Auto Negotiation Speed Advertisement and Auto Negotiation
Duplex Advertisement pull-down menus, set Speed and Duplex
Advertisement, respectively. The switch sends these values to the device on the
other end of the connection at the start of the auto-negotiating process. In general,
the defaults are best, but there may be situations when you want to fix one setting,
but allow the other setting to auto-negotiate. (This feature is only available for
10/10 TX).
13. From the Rate Limit Mode pull-down menu, select Enable if you want this port
to limit the number of unknown unicast and multicast (flooded) packets it tries to
forward.
a. From the Rate Limit Rate pull-down menu, select the percentage of a port’s
traffic that can be unknown unicast and broadcast packets. Lower this value if
the port is having overflow problems.
b. From the Rate Limit Burst Size pull-down menu, select a packet limit for
the number of packets allowed in a single burst. Valid values are 1 to 2048. For
Fast Ethernet ports, set this value lower than 1024 (the output buffer’s
capacity). Set this value lower if the port is experiencing overflow problems.
14. From the Pace Priority Mode pull-down menu, select Enable if you want this
port to recognize and use 3Com’s PACE priority mechanism.
15. Click APPLY to save your changes, or CANCEL to restore previous settings.