Port Management
Setting the Basic Port Configuration
Cisco Small Business 300 Series Managed Switch Administration Guide 89
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- 1000 Full—1000 Mbps speed and Full Duplex mode.
• Operation Advertisement—Displays the capabilities currently published to
the port’s neighbor to start the negotiation process. The possible options are
those specified in the Administrative Advertisement field.
• Back Pressure—Select the Back Pressure mode on the port (used with Half
Duplex mode) to slow down the packet reception rate when the switch is
congested. It disables the remote port, preventing it from sending packets
by jamming the medium.
• Flow Control—Enable or disable 802.3x Flow Control, or enable the auto-
negotiation of Flow Control on the port (only when in Full Duplex mode).
• MDI/MDIX—the Media Dependent Interface (MDI)/Media Dependent
Interface with Crossover (MDIX) status on the port. The switch ports are
wired by following the Telecommunications Industry Association standards.
The options are:
- MDIX—Select to connect this switch to hubs and switches by using a
straight through cable. This switch swaps its transmit and receives pairs,
so that this switch can be connected with another switch or a hub by
using a straight through cable.
- MDI—Select to connect this switch to a station by using a straight
through cable.
- Auto—Select to configure this switch to automatically detect the correct
pinouts for the connection to another device. If the other device supports
AutoMDX and the parameter is set to Auto, typically the devices
negotiate the pinouts, based on the type of cable connecting the devices
and the transmit and receive pinout configuration on each port.
• Operational MDI/MDIX—Displays the current MDI/MDIX setting.
• Protected Port—Select to make this a protected port. (A protected port is
also referred as a Private VLAN Edge (PVE).) The features of a protected port
are as follows:
- Protected Ports provide Layer 2 isolation between interfaces (Ethernet
ports and Link Aggregation Groups (LAGs)) that share the same
Broadcast domain (VLAN).
- Packets received from protected ports can be forwarded only to
unprotected egress ports. Protected port filtering rules are also applied
to packets that are forwarded by software, such as snooping
applications.
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