test

Platform Notes: SunFDDI Adapter

Interpreting Statistics from Neighboring Stations

Running the pf_stat utility with the -m option displays information about the neighboring stations attached to the local interface pf<inst>.

Phy (Physical Connection)

PHY shows the type of physical connection to the FDDI network. This heading is modified to indicate the type of port being managed:

The following states may be returned by pf_stat under the Phy heading:

Table 2-4 pf_stat States Under the PHY Heading

State 

Meaning 

NONE

Port disconnected 

M

Port connected to Port M on a concentrator 

S

Port connected to Port S on a single-attached station 

A

Port connected to Port A on a dual-attached station 

B

Port connected to Port B on a dual-attached station 

Frame (Frames Received)

Running pf_stat or nf_stat without an interval and count displays the total number of SMT frames received since the interface was activated. Running pf_stat or nf_stat with an interval and count displays the number of SMT frames received since the last interrogation.

More detailed information about the SMT frames can be recovered using the pf_smtmon(1M) or nf_smtmon(1M) utility described in "Monitoring SMT Frames".

Error (Error Frames)

Running pf_stat or nf_stat without an interval and count displays the total number of error frames received since the interface was activated. Running pf_stat or nf_stat with an interval and count displays the number of error frames received since the last interrogation. An error frame is defined as an SMT frame whose E (error) bit is set, and whose E bit is first detected by the local station. It does not indicate the location of the cause of the error. Frequent error frames can indicate a noise problem on the network, either dirt (optical fiber) or electrical interference (UTP).

Lost (Lost Frames)

Running pf_stat or nf_stat without an interval and count displays the total number of lost frames since the interface was activated. Running pf_stat or nf_stat with an interval and count displays the number of lost frames since the last interrogation. A lost frame is defined as an SMT frame whose reception is aborted by the local station. It does not indicate the location of the cause of the error. A large number of lost frames can indicate a noise problem on the network, either dirt (optical fiber) or electrical interference (UTP).

SA (Station Address)

Displays the MAC address for the local station.

UNA (Upstream Neighbor Address)

Displays the MAC address for the neighboring station, connected upstream on the ring from the local station.

DNA (Downstream Neighbor Address)

Displays the MAC address for the neighboring station, connected downstream on the ring from the local station.