Foundry Networks FESX User Manual

Foundry Configuration Guide for the FESX, FSX, and FWSX
7 - 14 © Foundry Networks, Inc. December 2005
Port number and STP state The internal port number and the port’s STP state.
The internal port number is one of the following:
• The port’s interface number, if the port is the designated port for
the LAN.
• The interface number of the designated port from the received
BPDU, if the interface is not the designated port for the LAN.
The state can be one of the following:
• BLOCKING – STP has blocked Layer 2 traffic on this port to
prevent a loop. The device or VLAN can reach the root bridge
using another port, whose state is FORWARDING. When a port
is in this state, the port does not transmit or receive user frames,
but the port does continue to receive STP BPDUs.
• DISABLED – The port is not participating in STP. This can occur
when the port is disconnected or STP is administratively disabled
on the port.
• FORWARDING – STP is allowing the port to send and receive
frames.
• LISTENING – STP is responding to a topology change and this
port is listening for a BPDU from neighboring bridge(s) in order to
determine the new topology. No user frames are transmitted or
received during this state.
• LEARNING – The port has passed through the LISTENING state
and will change to the BLOCKING or FORWARDING state,
depending on the results of STP’s reconvergence. The port does
not transmit or receive user frames during this state. However,
the device can learn the MAC addresses of frames that the port
receives during this state and make corresponding entries in the
MAC table.
Note: If the state is DISABLED, no further STP information is
displayed for the port.
Port Path cost The port’s STP path cost.
Port Priority This port’s STP priority. The value is shown as a hexadecimal
number.
Root The ID assigned by STP to the root bridge for this spanning tree.
Designated Bridge The MAC address of the designated bridge to which this port is
connected. The designated bridge is the device that connects the
network segment on the port to the root bridge.
Designated Port The port number sent from the designated bridge.
Designated Path Cost The cost to the root bridge as advertised by the designated bridge that
is connected to this port. If the bridge is the root bridge itself, then the
cost is 0. The identity of the designated bridge is shown in the
Designated Bridge field.
Table 7.6: CLI Display of Detailed STP Information for Ports (Continued)
This Field... Displays...

Foundry Networks FESX Specifications

General

Brand	Foundry Networks
Model	FESX
Category	Switch
Language	English