Setting Up The Switch Unit - 3Com SuperStack II 3000 TX User Manual

Setting Up the Switch Unit

With the Switch Management screen displayed,
choose the management level Unit, then select the
SETUP button.
The Unit Setup screen is displayed as shown in
Figure 4-10. The screen shows the following fields:
Unit Name This read-only field shows the type of
device.
sysName This field takes its name from the MIB II
System Group object. You can edit the first 30 char-
acters of this field to make the name more mean-
ingful. This name is displayed on the Main Banner
when you first access the VT100 screens, and is also
accessible to an SNMP Network Manager.
PACE Enable / Disable This field allows you to
enable or disable PACE (Priority Access Control
Enabled) for all ports on the Switch. PACE allows
multimedia traffic to be carried over standard Ether-
net and Fast Ethernet LANs by providing two fea-
tures:
Implicit Class of Service — When multimedia traf-
fic is transmitted, it is given a higher priority
than other data and is therefore forwarded ahead
of other data when it arrives at the Switch. The
Implicit Class of Service feature minimizes latency
through the Switch and protects the quality of
multimedia traffic.
Figure 4-10 Unit Setup screen
Interactive Access — When two-way multimedia
traffic passes over an Ethernet network, interfer-
ence can occur because access to the bandwidth
is unequally allocated to traffic in one direction.
The Interactive Access feature allocates the avail-
able bandwidth equally in both directions, there-
fore increasing the quality of the traffic.
Interactive Access should only be enabled on ports
that connect to a single endstation, switch, bridge,
or router. You should disable Interactive Access on
a port if it is connected to a repeater. Also, Interac-
tive Access should be enabled at only one end of a
link.
For more information about disabling Interactive
Access for a port, refer to
Ports" on page 4-11.
Setting Up the Switch Unit
"Setting Up the Switch
4-9