LANCP Volatile Device Database

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The volatile device database is a database that contains information about LAN devices that exist on the system. The database contains a single entry for each LAN device that exists on the system; each entry contains device information and MOP downline load counters information.

The LANCP volatile device database is populated with information from the permanent device database when the LANACP LAN server process is started. Therefore modifications to the volatile database are only valid until the LAN server process is restarted. To make sure the modifications survive a restart of the server, modify the permanent device database.

Viewing the Database

To view the volatile device database, use the LANCP SHOW DEVICE command. (To view the permanent database, use the LANCP LIST DEVICE command; these commands share the same qualifiers).

Command Function Example
SHOW DEVICE/CHARACTERISTICS Displays status and related information about the device


LANCP> show dev ewa0 /characteristics

SMAN43 Device Characteristics EWA0 (13-MAR-2019 09:04:18.23):
                  Value  Characteristic
                  -----  --------------
                   1500  Device buffer size
                 Normal  Controller mode
               External  Internal loopback mode
      00-22-64-94-BC-6F  Default MAC address (Hardware LAN address)
                         Multicast address list
               Ethernet  Communication medium
      FF-FF-FF-FF-FF-FF  MAC address (Current LAN address)
                    128  Minimum receive buffers
                    256  Maximum receive buffers
                    Yes  Full duplex enable
                    Yes  Full duplex operational
      00-22-64-94-BC-6F  MAC address (Current LAN address)
            TwistedPair  Line media type
                   1000  Line speed (mbps)
                Enabled  Auto-negotiation
                Enabled  Flow control
               Disabled  Jumbo frames
                      0  Failover priority
                Link Up  Link state
SHOW DEVICE/COUNTERS Displays device counters.


LANCP> show dev ewa0 /counters

SMAN43 Device Counters EWA0 (13-MAR-2019 09:04:35.02):
                  Value  Counter
                  -----  -------
                 582896 Seconds since last zeroed
            62788872086 Bytes received
              625542635 Bytes sent
               46698021 Packets received
                7090058 Packets sent
              317308984 Multicast bytes received
               43771772 Multicast bytes sent
                2842575 Multicast packets received
                 453952 Multicast packets sent
                      0 Unrecognized unicast destination packets
                 971437 Unrecognized multicast destination packets
                      0 Unavailable station buffers
                      0 Unavailable user buffers
                      0 Alignment errors
                      0 Frame check errors
                      0 Frame size errors
                      0 Frame status errors
                      0 Frame length errors
                      0 Frame too long errors
                      0 Data overruns
                      0 Send data length errors
                      0 Receive data length errors
                      0 Transmit underrun errors
                      0 Transmit failures
                      0 Carrier check failures
                      0 Station failures
                      0 Initially deferred packets sent
                      0 Single collision packets sent
                      0 Multiple collision packets sent
                      0 Excessive collisions
                      0 Late collisions
                      0 Collision detect check failures
                      1 Link up transitions (6-MAR-2019 15:09:40.00)
                      0 Link down transitions
                   None Time of last generic transmit error
                   None Time of last generic receive error

SHOW DEVICE/CLEAR_COUNTERS Clears device counters and internal driver counters after a SHOW DEVICE/COUNTERS or SHOW DEVICE/INTERNAL_COUNTERS command. Subsequent SHOW commands show the counter values accumulated since the clear was done. This affects counters displayed by LANCP only.
SHOW DEVICE/RESTORE_COUNTERS Restores device counters and internal driver counters prior to a SHOW DEVICE/COUNTERS or SHOW DEVICE/INTERNAL_COUNTERS command.
SHOW DEVICE/DLL or SHOW DEVICE/MOPDLL Displays LAN volatile device database information related to MOP downline load for the device.


LANCP> show dev ewa0 /dll

SMAN43 Device Listing, volatile database (13-MAR-2019 09:08:00.12):
                 --- Downline Load Service Characteristics ---
  Device     State   Access Mode      Clients           Data Size
  ------     -----   -----------      -------           ---------
  EWA0      Disabled NoExclusive  NoKnownClientsOnly     246 bytes
SHOW DEVICE/INTERNAL_COUNTERS Displays internal counters. By default, it does not display zero counters. To see all counters, including zero, use the addition qualifier /ZERO. To see the debug counters, use the additional qualifier /DEBUG.


LANCP> show dev ewa0 /internal_counters

SMAN43 Device Internal Counters EWA0 (13-MAR-2019 09:08:16.08):
                  Value  Counter
                  -----  -------
                         --- Internal Driver Counters ---
             "Merl5704"  Device name
 "Jul 27 2016 10:18:07"  Driver timestamp
                    100  Driver version (X-n)
               21000000  Device revision (Broadcom 5701,5703,5704,5715 chip)
               47829521  Device interrupts
                      1  Link transitions
                 583118  Link checks
                      1  Device resets
                      1  Device initializations
                 388705  User start/change/stop requests
                    320  Standard receive buffers
                      8  Jumbo receive buffers (current)
                      8  Jumbo receive buffers (minimum)
                      8  Jumbo receive buffer allocations
                   2158  Standard buffer size (bytes)
                   1518  Standard packet size (bytes)(device standard ring)
                   9658  Jumbo buffer size (bytes)
                   9018  Jumbo packet size (bytes)(device jumbo ring))
               000002A4  Requested link state <FlowControl, Fdx, 1000 mb,
               000002A5  Current link state <FlowControl, Fdx, 1000 mb,
                         Auto-negotiation, Link up>
               00000003  Remote flow capabilities <Transmit_Pause,
                      4  Current link up timer
               00040488  Driver flags <Device_Link_Handling,
                         Dynamic_Interrupt_Coalescing, 5704, Copper>
               00000008  Driver state <RunUp>
                     64  DMA width (bits)
                     66  BUS speed (mhz)
                  PCI-X  BUS type
                IOSAPIC  Interrupt mode
               00000086  MSI control (Alloc<6:4>,Req<3:1>,Enable<0>)
                     16  Transmit coalesce value
                     16  Receive coalesce value
                     50  Transmit interrupt delay (usec)
                     10  Receive interrupt delay (usec)
                    100  DIM (dynamic interrupt mitigation) tics
                     18  DIM receive interrupts
                     19  DIM receives done
                     10  DIM transmit interrupts
                     18  DIM transmits done
                   5920  Map registers allocated
             0:00:01.00  Transmit time limit
             0:00:00.25  Timer routine interval
                         --- Registers (wrote/read) ---
      210002B8 210000BA  Misc Host Control
      00E04F08 00E04F08  MAC Mode <Enable_FHDE, Enable_RDE, Enable_TDE,
                         Enable_TX_Stats, Enable_RX_Stats, Link_Polarity,
                         Max_Deferral, TX_Burst, PM1>
      0F40141C 00800003  MAC Status <Signal_Detect, PCS_Synched>
      00001006 00001006  RX Mode <ExtendedHash, FlowCtrl, Enable>
      FFFFFFFF 00000008  TX Status <LinkUP>
                         --- Time Stamps ---
           161:58:48.03  Current uptime
             0:00:08.19  Last reset
             0:00:11.94  Last link up
           161:58:36.09  Total link uptime
             0:00:11.94  Total link downtime
             0:00:02.00  Shortest link uptime period acceptable
             0:00:10.00  Link uptime period to nullify blocking
             0:01:00.00  Maximum time to block a link check
                         --- Driver Auto-Negotiation Context (fiber) ---
            Not_Autoneg  Current state
                         --- Fork Delay (after scheduled) ---
                   7384  10..19 milliseconds
                         --- Transmit Time ---
                  18255  10..19 milliseconds
                      1  20..29 milliseconds
                         --- Receive completion time ---
                   7879  10..19 milliseconds
                         --- One second timer time ---
                     30  10..19 milliseconds
                      1  20..29 milliseconds
                     12  30..39 milliseconds
                     12  40..49 milliseconds
                      2  50..59 milliseconds
                      1  100..109 milliseconds
                      1  >150 milliseconds
                         --- Status Block ---
               00000060  Status tag value
               00000005  Status <Updated>
                    273  Receive Standard Consumer index
                    785  Receive Ring 0 Producer index
                    509  Send Ring 0 Consumer index
                         --- Statistics Block ---
                         ----- Statistics - Receive MAC ---
            62789143368  Bytes received
               43856648  Unicast packets received
                1788916  Multicast packets received
                1054724  Broadcast packets received
                1165783  Packets (64 bytes)
                 122524  Packets (65-127 bytes)
                4475574  Packets (128-255 bytes)
                  43337  Packets (256-511 bytes)
                   1075  Packets (512-1023 bytes)
               40891995  Packets (1024-1522 bytes)
                         ----- Statistics - Transmit MAC ---
              679551923  Bytes sent
                6637276  Unicast packets sent
                 259772  Multicast packets sent
                 194355  Broadcast packets sent
                         ----- Statistics - Receive List Placement State Machine ---
               46700288  Frames received onto return ring 1
                    425  Receive threshold hit
                         ----- Statistics - Send Data Initiator State Machine ---
                7091403  Frames sent from send ring 1
                         ----- Statistics - Host Coalescing State Machine ---
                7120513  Send producer index updates
               48729929  Ring status updates
               48347695  Interrupts generated
                 382234  Interrupts avoided
                      3  Send threshold hit
                         --- Driver Messages ---
 6-MAR-2019 14:09:39.30  Link up: 1000 mbit, full duplex, flow control (txrx)
 6-MAR-2019 14:09:35.67  Device type is BCM5704C (UTP) Rev B0 (21000000)
 6-MAR-2019 14:09:35.55  Merl5704 located in 64-bit, 66-mhz PCI-X slot
 6-MAR-2019 14:09:35.55  Auto-negotiation mode assumed set by console

SHOW DEVICE/MESSAGES Displays the console messages displayed by the LAN driver as part of the LAN driver internal counters. This qualifier is included for convenience, to avoid scanning the internal counters to get to the message data.


LANCP> show dev ewa0 /messages

SMAN43 Device Internal Counters EWA0 (13-MAR-2019 09:09:11.67):
                  Value  Counter
                  -----  -------
 6-MAR-2019 14:09:39.30  Link up: 1000 mbit, full duplex, flow control (txrx)
 6-MAR-2019 14:09:35.67  Device type is BCM5704C (UTP) Rev B0 (21000000)
 6-MAR-2019 14:09:35.55  Merl5704 located in 64-bit, 66-mhz PCI-X slot
 6-MAR-2019 14:09:35.55  Auto-negotiation mode assumed set by console
SHOW DEVICE/REVISION Displays the current LAN driver and device revision information if available or applicable. Not all LAN drivers maintain revision information.


LANCP> show dev ewa0 /revision

SMAN43 Device Revisions EWA0 (13-MAR-2019 09:09:31.89):
                  Value  Component
                  -----  ---------
               00000000  Device hardware revision
      08400100 00000001  Port driver revision
      08410208 00000001  LAN common routines revision

SHOW DEVICE/TRACE Displays LAN driver trace data.


LANCP> show dev ewa0 /trace

SMAN43 Device Trace Data EWA0 (13-MAR-2019 09:10:28.68):
    Trace mask 00E427F0,FFFFFFFF, stop mask 00000000,00000000, trace buffer size 256 entries
               00000001,0 = One-second timer
               00000002,0 = Interrupt
               00000004,0 = Fork process started
               00000008,0 = Fork process done
               00000010,0 = Fork error
               00000020,0 = Fork soft error
               00000040,0 = State change
               00000080,0 = First user startup
               00000100,0 = User start/change/stop
               00000200,0 = Last user stop
               00000400,0 = Device shutdown
               00000800,0 = Receive issued
               00001000,0 = Receive done
               00002000,0 = Receive error
               00004000,0 = Receive packet
               00008000,0 = Transmit issued
               00010000,0 = Transmit queued
               00020000,0 = Transmit done
               00040000,0 = Transmit error
               00080000,0 = Transmit packet
               00100000,0 = DMA segment
               00200000,0 = SR entry
               00400000,0 = VCI action
               00800000,0 = LAN common
               01000000,0 = LAN other
               02000000,0 = RDL error
               0,00000001 = Link state
               0,00000002 = Transmit timeout
               0,00000004 = Stopped machine
               0,00000008 = Reset device
               0,00000010 = Init device, part 1
               0,00000020 = Init device, part 2
               0,00000040 = Check state machines
               0,00000080 = Auto-negotiation
               0,00000100 = Setup link
               0,00000200 = Check link
               0,00000400 = Check link error
               0,00000800 = Force link settings
               0,00001000 = Apply link settings
               0,00002000 = Apply flow settings
               0,00004000 = Enable loopback
               0,00008000 = Write PHY
               0,00010000 = Read PHY
               0,00020000 = SET_MAC function
               0,00040000 = Message
               0,00080000 = Long fork time
               0,00100000 = Long transmit time
               0,00200000 = Link down avoided
               0,00400000 = ISR receive refill
               0,00800000 = Long complete rcv
               0,01000000 = Rcv return bug
               0,02000000 = Xmt ring bug
               0,04000000 = DIM adjustment
               0,08000000 = Receive error pkt
               0,10000000 = Long second
               0,20000000 = Link flap/bounce
               0,40000000 = Other

Sequence #   EntryTimeStamp   Delta      Time      Description           XmtOut RcvOut Misc  AddlData
----------   --------------   -----      ----      -----------           ------ ------ ----  --------
   4082272   583319.269735        0   08:09:53.74  LAN common                 0    72  01   STCU     85EEFF00
   4082273   583319.269736        1   08:09:53.74  LAN common                 0    72  01   SCLS     8EAFA000 85EEFF0
0 00000004
   4082274   583319.269737        1   08:09:53.74  User start/change/stop     0   255  18   85EEFF00 000002A5 0148014
8 01400008
   4082275   583319.269738        0   08:09:53.74  Check state machines       0   255  18   00000001
   4082276   583319.269785       47   08:09:53.74  Check state machines       0   255  18   00000002
   4082277   583319.269812       26   08:09:53.74  LAN common                 0    72  01   PCHI     00003123
   4082278   583319.269812        0   08:09:53.74  LAN common                 0    72  01   PCHE     00003103
   4082279   583319.344642    74829|  08:09:53.81  Check link                 0   255  08   040002A5 0000796D 0000000
1 000002A4
   4082280   583320.344689  1000046%  08:09:54.81  Check link                 1   255  08   040002A5 0000796D 0000000
1 000002A4
   4082281   583321.344643   999954#  08:09:55.81  Check link                 1   255  08   040002A5 0000796D 0000000
1 000002A4
SHOW DEVICE/VLAN Displays a list of IEEE 802.1Q tags that are configured on the switch port connected to the specified physical LAN device. LANCP listens for the GVRP packets that contain the configuration information and displays the configured tags. The switch periodically sends GVRP (GARP VLAN Registration Protocol) (GARP = Generic Attribute Registration Protocol) packets to provide VLAN configuration information in compliance with the IEEE 802.1Q specification. If GVRP is not configured on the switch, or if the LAN device is not connected to a switch, this command displays only the list of tags that the VLAN drive has configured.


LANCP> show dev ewa0 /vlan

SMAN43 Listening for VLAN configuration data on device EWA0 (13-MAR-2019 09:11:10.74) ........
SMAN43 VLAN configuration visible on device EWA0 (13-MAR-2019 09:11:24.74):
   No VLANs found

Changing the Database

To add a device to the volatile device database or modify an entry for a device there, use the SET DEVICE command (for the permanent database, use the DEFINE DEVICE command; these commands share the same qualifiers).

Command Function Example
SET DEVICE/ALL Sets data for all LAN devices. If you specify a device name, all matching LAN devices are selected.


Allows some device-specific parameters to be adjusted. These are useful for debug purposes or for experiments while doing performance measurements. Like other LANCP commands which affect devices, this command requires SYSPRV privilege. Specify the negated qualifer to clear all device-specific parameter data. These functions are described in a text file on the system, SYS$HELP:LAN_COUNTERS_AND_FUNCTIONS.TXT.
SET DEVICE/DLL or SET DEVICE/MOPDLL=(enable-option, exclusive-option, size-option, knownclientsonly-option)

/DLL and /MOPDLL values

Specify ENABLE or DISABLE to indicate that MOP downline load service should be enabled or disabled for the device. Specify EXCLUSIVE to indicate that no other provider of MOP downline load service is allowed on the specified LAN device at the same time as LANACP. Specify NOEXCLUSIVE to indicate that the LAN MOP downline load service can coexist with other implementations (in particular, the DECnet Phase IV and DECnet Plus implementations that include MOP support). Note that when you select NOEXCLUSIVE, LANACP responds only to MOP downline load requests directed to nodes defined in the LAN node database. Use SIZE=value to specify the size in bytes of the file data portion of each downline load message. The permitted range is 246 to 1482 bytes. The default value is 246 bytes, which should allow any client to load properly. Note that some clients may not support the larger size. The recommended size for better load performance and less server overhead is the largest size that results in successful loads of all clients. The 1482 value is derived from the maximum packet size for CSMA/CD (Ethernet) of 1518 bytes less the 802e header and CRC (26 bytes) and MOP protocol overhead (10 bytes). You can override the size on a per-node basis. See Help on the LANCP SET NODE commands for details. Specify KNOWNCLIENTSONLY to indicate that MOP downline load requests should be serviced only for clients defined in the LAN permanent node database. When you select NOKNOWNCLIENTSONLY, LANACP searches the LAN$DLL directory for any images requested by clients that are not defined in the LAN node database. Note that this option is not available when NOEXCLUSIVE mode has been selected. When NOEXCLUSIVE mode is selected, LANACP services MOP downline load requests only for clients defined in the LAN node database.

Provides the MOP downline load service settings for the device. Note that defaults apply to creation of an entry in the device database. If an existing entry is being modified, fields not specified remain unchanged.
SET DEVICE/MAX_BUFFERS=value Sets the maximum number of receive buffers to be allocated and used by the LAN driver for the LAN device.
SET DEVICE/MIN_BUFFERS=value Sets the minimum number of receive buffers to be allocated and used by the LAN driver for the LAN device.
SET DEVICE/PERMANENT Updates the device entries in the LAN volatile device database with any data currently set in the permanent database. This allows you to update the volatile database after changing data in the permanent database, rather than repeating the commands for each updated entry to apply the changes to the volatile database.
SET DEVICE/TAG=value Specifies the IEEE 802.1Q tag for the VLAN device. value is the IEEE 802.IQ tag number.
SET DEVICE/TRACE=size-option,mask-option,stop-option


/TRACE values

Use SIZE=value to specify the size of the trace buffer in entries, each 32 bytes. The default is 2048 entries. The permitted range is 256 to 1000000. The size MOD 3 encodes the amount of packet data to include, either 35 bytes, 66 bytes, 97 bytes, or the entire packet. Use MASK=(value1,value2) to specify the trace mask to select which type of entries should be collected in the trace buffer. The first 32 bits consist of events common to most LAN drivers. The second 32 bits consist of events specific to the LAN driver for the specified device. Use STOP=(value1,value2) to specify the trace mask to select which type of entries should stop tracing. When a trace entry is made that matches one of the bits in the stop mask, the trace mask is cleared so that you can look at the trace data accumulated so far.

Provides the LAN driver trace settings for the device. By default, most LAN drivers do tracing of error conditions and state changes. Tracing is controlled by an event mask that selects the events to trace, a stop mask that specifies when to stop tracing, and the size of the trace buffer.

You can change tracing settings at any time. The LAN driver allocates the trace buffer from non-paged pool. You can calculate the amount of pool needed by multiplying the number of entries by the size of each entry, 32-bytes. The impact of tracing on the system is negligible for error and state change events, more significant when all events are selected, and very significant when full packet tracing is enabled. The command SHOW DEVICE/TRACE displays trace results as well as the trace mask.

SET DEVICE/UPDATE Adds LAN devices that are not currently in the LAN volatile device database to that database. The initial entry for the device uses default values for all parameters. To update the volatile database with current information from the permanent database, use the SET DEVICE command with the /PERMANENT

qualifier. You can combine the /UPDATE and /PERMANENT qualifiers in a single SET DEVICE command.



Specifies the physical LAN device that is to host the VLAN device. The /NOVLAN_DEVICE qualifier requests deactivation of the VLAN device. When deactivating the VLAN device, the device-name is not required because the VLAN driver knows which device is hosting the VLAN device. Note that a VLAN device cannot be deactivated if any applications continue to use the device.
Ethernet Devices


Enables or disables the use of auto-negotiation to determine the link settings. You may need to disable link auto-negotiation when connected to a switch or device that does support auto negotiation.


Enables flow control on a LAN device.


Enables full-duplex operation of a LAN device. Before full-duplex operation results from the use of this qualifier, additional device or network hardware setup may be required. Some devices may be enabled for full-duplex operation by default. Some devices may not allow the setting to be changed.

The /NOFULL_DUPLEX qualifier disables full-duplex operation.



Enables the use of jumbo frames on a LAN device. Only Gigabit Ethernet NICs support jumbo frames.

Acceptable values are AUI (10Base2, 10Base5), TWISTEDPAIR (10BaseT), and AUTOSENSE (reperform the limited autosense algorithm). The default value is AUTOSENSE.

Selects the cable connection. Normally, the selection is made during device initialization using a limited autosensing algorithm that selects twisted pair, but fails over to AUI (Attachment Unit Interface) if twisted pair does not appear to be functional. Thereafter, a cabling change would require a reboot of the system to take effect. This command allows you to change the selection without rebooting.

Some devices, such as the DE435, require a jumper change on the Ethernet card to switch between 10Base2 and 10Base5 (thinwire and thickwire). Other devices, such as the DE434, DE436, and DE500, have only twisted pair connections.


Valid values are 10, 100, 1000, 10000, or autonegotiate; the last choice, autonegotiate, selects the 10 Mb/s for Ethernet, 100 Mb/s for Fast Ethernet, 1000 Mb/s for Gigabit Ethernet, and 10000 Mb/s for 10-Gigabit Ethernet. If you select autonegotiate, the LAN driver repeats autonegotiation.

Sets the speed of the LAN.
LAN Failover Devices
SET DEVICE/DISABLE Disables the devices in a LAN Failover set. When disabled, LAN devices can be added to or deleted from the Failover set.
SET DEVICE/ENABLE Enables a Failover set, which activates the Logical LAN device. The LAN Failover driver selects a LAN device from the LAN Failover set as the active device and then allows I/O to the Logical LAN device.
SET DEVICE//FAILOVER_SET=(device-name[,...])


Specifies the members of a LAN Failover set.
SET DEVICE/PRIORITY=value Sets the failover priority of a LAN device. Priority is given to the LAN failover device with the highest priority when choosing the active LAN device. When a LAN device with a higher priority becomes available, a failover transition to the newly available device is performed. This allows a system manager to set a preferred device by setting one LAN device to a higher priority than others. The LAN failover driver uses the preferred device when it is available.

STANDARD is the Ethernet maximum packet size of 1519 bytes. JUMBO is the oversize packet size available with the Gigabit Ethernet devices. It is allowed only if all the LAN devices in the LAN failover set are Gigabit devices.

Sets the packet size of the LAN failover device. Note that the size specified for the LAN failover device overrides the size set on

the members of the LAN failover set; that is, the JUMBO frame setting of a LAN device is of no consequence when the size is determined for the LAN failover device.

SET DEVICE/SWITCH Forces a LAN failover to another member of the LAN failover set. You can test LAN failover operation by using this command to switch from one device to another.
FDDI Devices
SET DEVICE/RING_PURGER Enables the ring purger process of the FDDI device.
SET DEVICE/TOKEN_ROTATOR Sets the requested token rotation time for the FDDI ring.
SET DEVICE/TOKEN_TIMEOUT Sets the restricted token timeout time for the FDDI ring.
SET DEVICE/TRANSMIT_TIMEOUT Sets the valid transmission time for the FDDI device.
Token Ring Devices
SET DEVICE/AGING_TIMER=value Sets the amount of time in seconds to age Token Ring source routing cache entries before marking them stale. This timer expires when no traffic is sent to or received from the remote node in this amount of time. The default value is 60 seconds.

Increase this value when idle connections bounce between the stale and known states. Setting this value too low may cause unnecessary explorer traffic to traverse the LAN.

SET DEVICE/CACHE_ENTRIES Sets the number of entries to reserve for caching Token Ring source routing address entries. The default value is 200 entries. If your system directly communicates to a large number of systems, you may want to increase this number.

/NOCONTENDER (default)

Specifies that the Token Ring device is to participate in the Monitor Contention process when it joins the ring. The /NOCONTENDER qualifier, directs the device not to challenge the current ring server.
SET DEVICE/DISCOVERY_TIMER=value Sets the number of seconds to wait for a reply from a remote node when performing the source Token Ring routing route discovery process. The default value is 2 seconds.

If you have nodes that respond slowly on your extended LAN, you may need to increase this number to reduce the amount of explorer traffic that traverses your LAN.



Enables Early Token Release on the device. The /NOEARLY qualifier, disables Early Token Release.


Maps a standard multicast address to a functional address. Token ring devices do not support IEEE 802 standard globally defined group addresses. They do support functional addresses. A functional address is a locally administered group address that has 31 possible values. Each functional address sets one bit in the third through sixth byte of the address and bytes 1 and 2 are 03-00 (C0:00

in bit reversed format). The /NOMAP=(MULTICAST_ADDRESS=address) qualifier, clears the mapping established for the specified address.

SET DEVICE/MEDIA=value Selects the type of cable media used to connect the adapter to the Token Ring Media Access Unit (MAU) for devices that do not automatically detect this. Acceptable values for this are either unshielded twisted pair (UTP) or shielded twisted pair (STP). The default value is STP.
SET DEVICE/SOURCE_ROUTING (default) /NOSOURCE_ROUTING Enables source routing on the Token Ring device. If you only have one ring in your LAN or you use transparent bridging, use the /NOSOURCE_ROUTING qualifier to turn off source routing.
SET DEVICE/SPEED=value Sets the speed of the Token Ring LAN. Valid values are either 4 or 16, indicating 4 megabits per second or 16 megabits per second. The default value for Token Ring is 16, unless the LAN adapter supports a nonvolatile mechanism for setting this parameter.
SET DEVICE/SR_ENTRY=(LAN_ADDRESS=address, RI=routing-information)


Statically defines a specific source-routed route for a specific node. The default value is no routes specified. This caching remains valid while used or until the aging timer expires.

Use this qualifier only as a last resort when isolating communication failures on extended LAN topologies. The /NOSR_ENTRY=(LAN_ADDRESS=address) qualifier, clears the previously defined static source routed route. The address is a standard 6-byte LAN address (given as hexadecimal byte characters separated by hyphens), which specifies the canonical form of the address. Using a colon as the separator character indicates the bit-reversed form of the address. The routing-information is the source routing field, specified as a series of two-byte hexadecimal characters (each byte separated by a hyphen). The field consists of a two-byte routing control field followed by up to 14 two-byte segment identifiers, each containing the ring number and the bridge number used in the hop. See Default Functional Address Mapping for Token Ring Devices.

ATM Devices
SET DEVICE/ATMADDRESS=LES=([NO]LES=the ATM server) Sets the LAN emulation server (LES) address for asynchronous transfer mode (ATM). Usually the address is not user specified, and this qualifier is used only if you want a specific address. By default the address is determined by software from the configuration server for the LES.
SET DEVICE/ARP=(ARP=atm_arp_server) Sets the address resolution protocol (ARP) server address for Classical IP over ATM. This qualifier is required before a LIS is enabled if the local host is not the ARP server.
SET DEVICE/CLIP Sets the Classical Internet Protocol (CLIP) over ATM (RFC1577). The CLIP qualifier implements a data-link level device as a client and/or a server in a logical IP subnet (LIS). This allows the IP protocol to transmit Ethernet frames over the ATM network. The /CLIP = ENABLE command causes the system to join the LIS. The /CLIP = DISABLE command causes the client to leave the logical IP subnet. Note that a LIS requires a server, and there must be only one server for each subnet. Communication between subnets can only be performed by a router. There can only be one client for each ATM adapter. The syntax is as follows:
SET DEVICE/CLIP =(ip_subnet=a.b.c.d,             ! IP address of the CLIP client
                  ip_address=a.b.c.d,            ! the subnet mask of the CLIP client
                  parent=devnam,                 ! the parent device name
                  name="ip subnet name",         ! name for the LIS tp aid in operations and 
                                                 ! diagnostics
                  enable, disable                ! joins or leaves the subnet
                  type = client|server)          ! starts up a classical IP server and client
SET DEVICE/ELAN The /ELAN qualifier has two values: enable and disable. With /ELAN=ENABLE along with the keyword STARTUP, the LAN emulation is loaded when LANACP starts. With /ELAN=DISABLE, the same parameters used with ENABLE can be invoked. The /ELAN qualifier’s syntax is as follows:
DEFINE DEVICE/ELAN =(parent=parent device,
                     name="ELAN NAME to join",
                     description = "string")
SET DEVICE/PVC Sets the permanent virtual circuit (PVC) to be used by a Classical IP over ATM client. This is an optional qualifier. The list of PVCs is defined for use by CLIP clients. This command should be used before enabling the CLIP client. The PVC has to be set up manually in the ATM switch.

Enables monitor contention, UTP cable media, source routing and disables early token release for Token Ring device ICA0.


Sets the media type to twisted pair for the second Tulip Ethernet device, EWB0.


Enables MOP downline load service for device EXA0, leaving the remaining MOPDLL parameters unchanged.


Enables MOP downline load service for device EXA0, in exclusive mode with the data transfer size of 1482 bytes, leaving the remaining MOPDLL parameters unchanged.


These commands enable LANACP MOP downline load service for:

  • LAN device EXA0 in nonexclusive mode
  • LAN device FXB0 in exclusive mode for only known clients