Switch Release Notes
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.










