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The fddilink utility is used
to display the operating characteristics of an FDDI network. The
monitor provides information about the node on which the program
is loaded, the upstream and downstream neighbors, the ring state,
the token rotation times, and so forth. It can be run from a remote
shell where the shell is located on a system that contains an adapter. To monitor the network, enter the following: fddilink lanx where x
is the instance number for the adapter. Navigating Menu Screens | |
Each menu item contains an upper screen and a lower screen. Press the Space bar to switch the
screen from an upper to lower screen and from a lower to an upper
screen. To access another menu, enter the number of the
menu from the choices at the bottom of the screen. To view the next page of the current menu, press
the Space bar. To exit the fddilink
utility, press Esc.
Composite Data Screen | |
The opening screen is the Composite Data screen. It contains
most of the information needed to monitor the state of the ring,
along with a menu for navigating the utility. Sample upper and lower
opening screens for a dual-attach adapter are shown below. |
\:Poll Rate = 1000 MS Composite Data
StationID : 1000 906B 017C ECM-IN CFM-C_WRAP_B RMT-RING_OP
ManufactureData: XDI731-Interphase Corp.
UserData : P5511-Interphase Corp.
SMT Version Op : 0x0002 Hi: 0x0002 Lo: 0x0002
MAC: UpStreamNbr DownStreamNbr : OldUpStreamNbr OldDownStreamNbr
1 1000 9038 D344 1000 9038 D344 : 0000 0000 0000 0000 0000 0000
PHY: ConPol Cutoff Alarm ConState RemoteType RemoteMAC PCM LER
A 0000 7 8 CONNECTING ? 0 BREAK 9
B 0000 7 8 ACTIVE S 1 ACTIVE 11
T-MAX Low: 1336.934 ms MAC Attribute Counts
TVX Low: 5.222 ms Frame : 0x000001F0 Error : 0x00000000
T-Req : 165.007 ms Copied : 0x000000C5 Lost : 0x00000000
T-Neg : 165.000 ms Transmit : 0x00000123 TvxExpired: 0x00000001
T-Max : 167.772 ms Frame/sec: 0x00000000 NotCopied : 0x00000003
TvxValue : 2.519 ms Token : 0x00000000 Late : 0x0000
RingOp : 0x00000000
-- Exit-<ESC> ----------------------- Menu --------------------- More-<Space> -
- 1:Composite 2:SMT 3:MAC 4:Counters 5:Port-A 6:Port-B 7:Path 8: N/A 9:Delay
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:Poll Rate = 1000 MS Composite Data
StationID : 1000 906B 01DC ECM-IN CFM-C_WRAP_B RMT-RING_OP
ManufactureData: XDI731-Interphase Corp.
UserData : P5511-Interphase Corp.
Lem PHYA: 0x00000000 Reject: 0x00000000
Lem PHYB: 0x00000000 Reject: 0x00000000
MAC Count: 0x01 ConfigCap : 0x0000
NonMaster: 0x02 ConfigPol : 0x0000
Master : 0x00 ConnectPol : 0x8000
PathsAval: 0x03
-- Exit-<ESC> ----------------------- Menu --------------------- More-<Space> --
1:Composite 2:SMT 3:MAC 4:Counters 5:Port-A 6:Port-B 7:Path 8: N/A 9:Delay
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| | | |  | NOTE: Select option 9: Delay at the bottom of the screen to
start polling the adapter at the regular intervals. Otherwise, the
display will only be updated with the current information when other
menu options are selected. | | | | |
The parameters most commonly used are defined below: Poll Rate indicates the rate at which
values are updated. This value can be changed by the Delay function
(option 9 at the bottom of the screen). StationID indicates the FDDI address (in non-canonical
order) of the station from which the fddilink
utility starts. ECM indicates the Entity Coordination Management.
The In state is the normal state for a completed connection. CFM describes the internal configuration of ports
and MACs within a station or concentrator. The CFM state can be
one of the following: WRAP_A, WRAP_B, WRAP_AB, C_WRAP_A,
and C_WRAP_B states indicate that there is only a single data ring.
Data for the ring is transmitted and received through the same port
(A or B). For an Single Attached Station where the A or B
port is attached to the M port of an FDDI device (such as a concentrator),
C_WRAP_A or C_WRAP_B is the normal operating state, depending on
the port used. In dual homing mode (connecting the station to two
concentrators), C_WRAP_B is the normal state. (Since port B is usually
the active port, port A would be in standby mode.) For a Dual Attached Station, the normal state is
THRU. A wrap state usually indicates that the dual ring is wrapped
(a failure was detected and a surrounding node is "wrapping"
and using either the A or B port to send and receive data). The
wrap state can also be a transitory startup state indicating that
the A or B port is ready to be incorporated into the ring. The ISOLATED state indicates that there is no internal
connection between the Media Access Control (MAC) and Physical Layer
Protocol (PHY) modules. Usually, this means that the card is not
cabled to the ring.
Refer to the CF_State variable description in the ANSI FDDI/SMT
specification for more details. RMT indicates Ring Management (RMT) status information
from the MAC and CFM. The RMT state can be one of the following: ISOLATED is the initial state. NON_OP indicates that the ring is not operational. RING_OP indicates that the ring is operational. DETECT indicates that a duplicate address was detected,
rendering the ring non-operational. NON_OP_DUP indicates the ring is not operational
because this MAC has a duplicate address. RING_OP_DUP indicates that this MAC has a duplicate
address. DIRECTED indicates that this MAC sends beacon frames
to notify the ring of a stuck condition. TRACE indicates that this MAC initiates a trace
function. Trace provides a recovery mechanism from a stuck beacon.
ManufactureData indicates the manufacturer of the
communication adapter or node. UserData indicates the communication board used
by the node. SMT Version Op indicates the field in the SMT header
that identifies the structure of the SMT Info field. This field,
with others in the header, allows all protocol versions to recognize
version mismatches. The value of the Version ID for NIFs (Neighbor
Information Frames), SIFs (Status Information Frames) and ECFs (Echo
Frames) value Op, Hi and Lo is a constant value of 0x0001. MAC stands for Media Access Control. UpStreamNbr indicates the upstream MAC address of
the unit from which data is received. DownStreamNbr indicates the downstream MAC address
of the unit from which data is received. OldUpStreamNbr indicates the previous upstream MAC
address of the unit from which data is received. OldDownStreamNbr indicates the previous downstream
MAC address of the unit from which data is received. PHY indicates Physical Layer Protocol. ConPol indicates the connection policies in effect
for a node. 0000 means that all possible connections are allowed. Cutoff indicates error rate estimate at which a
connection is broken. The range is 10-4 to 10-15. It is displayed
as the absolute value of the base 10 logarithm. The default is 7
(10-7). Alarm indicates error rate at which a link connection
generates an alarm. The range is 10-4 to 10-15. The default is 8
(10-8). ConState indicates the state of the connection.
The possible values are Disabled, Connecting, Standby, and Active. RemoteType indicates the type of port connector
at the other end of the physical connection. The possible values
are A, B, M, S or ? (a question mark for unknown). RemoteMAC indicates the presence (1) or absence
(0) of a MAC whose transmit path exits the station via this port.
There can be only one present at any one time. PCM indicates the state of the Physical Connection
Management (PCM) for this node. The possible values are Disable,
Connect, Standby and Active. LER indicates Link Error Rate. It ranges from 10-4
to 10-15.
Menu Items | |
The remainder of this section contains supplemental information
about the menu items. - The Composite
Menu [1:Composite]
Is the opening screen and contains the most-used
parameters. - The SMT Menu [2:SMT]
This menu displays the configuration policy and
paths available plus other SMT features. - The MAC Menu [3:MAC]
These menus show detailed MAC information. Some
of the basic information is provided in the Composite Data screen. - The Counters Menu [4:Counters]
displays values from the FDDI Counter Group, such
as, frame_ct and token_ct. Also, Status Group flags are displayed. - The Port A Menu (for DAS only) [5:Port-A]
This menu provides detailed information about the
A port of a dual attach station. Some of the basic information is
provided in the Composite Data screen. - The Port B Menu (for DAS only) [6:Port-B]
This menu provides detailed information about the
B port of a dual attach station. Some of the basic information is
provided in the Composite Data screen. - The Path Menu [7:Path]
This menu contains path information, Trace_Max expiration
and TVX and Max lower bound times. - The Attach Menu [8:Attach]
The information displayed on this menu includes
whether the node is a single or dual attach station, if an optical
bypass is present, and shows the I_Max Expiration time. - The Delay Menu [9:Delay]
This feature allows the user to set the rate measured
in seconds, for which the information on the fddilink
screens is updated. To set the delay rate, enter the desired rate
in seconds, and press Enter.
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Printable version
