Port Configuration
With the Port Configuration page, you can:
All ports are enabled by default.
To administratively disable a port:
- From the Status drop-down list, select Disable.
The Actual Port Settings section displays the actual
status of the port. An enabled port could have an actual
status of DOWN if no device is connected to it.
- Click OK.
A "linkdown" trap is sent to the management
station if you configured an SNMP manager.
- If you accessed this page through Cluster Manager, click Save
Config to save the configuration change to
nonvolatile memory.
To reenable a port, select Enable from the
drop-down list, and click OK.
Fast Ethernet ports can automatically match the duplex
capability and the transmission speed of an attached device.
Gigabit Ethernet ports can automatically match the duplex
capability of an attached device. ATM ports do not autonegotiate
duplex or speed settings.
Note: Changing the port configuration can
cause the Spanning-Tree Protocol (STP) to check for a new loop.
While STP reconfigures, the port LED is amber for about 30
seconds.
To change the duplex and transmission speed settings:
- From the Duplex drop-down list, select Full,
Half, or Auto.
Fast Ethernet, Gigabit Ethernet, and GigaStack GBIC ports
are set to Auto by default. ATM ports are set to Full.
Note: To connect to a remote Fast
Ethernet device that does not autonegotiate, you should
explicitly set the duplex on the local device to a value
other than Auto. Speed negotiation will work even if the
other device does not autonegotiate. To connect to a
remote Gigabit Ethernet device that does not
autonegotiate, you should disable autonegotiation on the
local device, and set the duplex and flow control
parameters to be compatible with the remote device. ATM
ports are always set to full duplex and do not
autonegotiate.
Note: Point-to-point GigaStack GBIC
ports connections operate in full-duplex mode. GigaStack
GBIC stack connections operate in half-duplex mode.
- From the Speed drop-down list, select 10 Mbps,
100 Mbps, or Auto.
By default, Fast Ethernet ports are set to Auto.
For Gigabit Ethernet ports, the default is 1000 Mbps and
not configurable. For ATM ports, the default is 155 Mbps
and not configurable.
- Click OK.
Note: While you can configure settings
for mixed multiple ports, some settings may not apply to
all ports. For example, you can select half duplex from
the drop-down list for a mixture of Ethernet, Gigabit
Ethernet, and ATM ports, but the application applies the
setting only to Ethernet and Gigabit Ethernet ports.
- If you accessed this page from Cluster Manager, click Save
Config to save the configuration change to
nonvolatile memory.
The Port Fast feature immediately brings a port from the
blocking state into the forwarding state by eliminating the
forwarding delay (the amount of time a port waits before changing
from its Spanning-Tree Protocol (STP) learning and listening
states to the forwarding state.
To enable the Port Fast feature:
- From the Port Fast drop-down list, select Enable
(if the port is connected to an end station).
This feature is disabled by default.
Note: The Port Fast feature does not
apply to ATM ports.
- Click OK.
- If you accessed this page from Cluster Manager, click Save
Config to save the configuration change to
nonvolatile memory.
To disable the Port Fast feature, select Disable
from the drop-down list, and click OK.
If you select a single port, the Port Configuration page
automatically displays the actual port settings in the Actual
Port settings section.
Note: If you select multiple ports, the
Actual Ports Settings section does not appear on the Port
Configuration page.
If you select a single port, the Port Configuration page
automatically displays the VLAN mode (static, dynamic, trunk, and
so forth) and the VLANs to which the port belongs.
Note: If you select multiple ports, the VLAN
Information section does not appear on the Port Configuration
page.