Additional information available:

ARPCOMMUNICATIONHOSTINTERFACENAME_SERVICE
NETWORKNFS_SERVERROUTE

  The SET ARP command is not normally used.

  ARP (address resolution protocol) is used to map dynamically between
  DARPA Internet and 10Mb/s Ethernet addresses.  It is used by all the
  10Mb/s Ethernet interface drivers.

  The SET ARP command has two parameters.  The first  parameter is the
  Ethernet  address  of  the interface you wish to communicate to.  The
  second parameter specifies  the  host  name  on  which the interface
  resides.   UCX will look up the internet address for the named host.
  This parameter is optional.  If you have not assigned a name to the
  host, you must use the /ADDRESS qualifier.

  Use the SET NOARP command to remove an Internet to Ethernet  address
  mapping.

  Format:
    SET [NO]ARP Ethernet_address [host_name]

Additional information available:

Explanation

/ADDRESS/PERMANENT/PUBLIC

  ARP  caches  Internet-Ethernet  address  mappings  every 3  minutes.
  When an interface requests a mapping  for  an  address  not  in  the
  cache, ARP  queues  the  message  which  requires  the  mapping  and
  broadcasts  a  message  on  the  associated  network  requesting the
  address mapping.  If a response  is  provided, the  new  mapping  is
  cached and  any  pending  messages  are  transmitted.  An  interface
  mapping request times out in twenty seconds.

  There are two situations  where  the  system  manager  may  want  to
  manually provide mapping information.

  A.  ARP is running and a change  has  been  made  to  a  network
      interface on some host.   In  this  case, the system manager
      would want to flush the Internet-Ethernet mapping tables  so
      that the new address change can be made known to the system.

  B.  One of the host systems which you want to  communicate  with
      does not support ARP;  therefore,  you  must map Internet to
      Ethernet addresses manually.

  Specifies the internet address of the host on  which  the  target
  interface resides.

  Format:
    SET [NO]ARP Ethernet_address [host_name]/ADDRESS=Internet_address

  Format:
    SET [NO]ARP Ethernet_address [host_name]/[NO]PERMANENT

  Specifies that the ARP mapping is to be made permanent in the
  internet driver's ARP tables.   This is the default.  Specify
  /NOPERMANENT to remove ARP mapping.

  Format:
    SET [NO]ARP Ethernet_address [host_name]/[NO]PUBLIC

  Specifies that the ARP code should respond to ARP requests for the
  indicated  host coming from other machines.   This is the default.
  Specify /NOPUBLIC if  you  want  the  mapping  information  to  be
  defined only on the local host.

  The SET COMMUNICATION command is used  to  set  Internet  software
  parameters for communication on the local host.

  Format:
    SET COMMUNICATION

Additional information available:

/BROADCAST/CHECKSUM/CLUSTER_TIMER/DEVICE_SOCKETS
/FORWARD/IRP/LARGE_BUFFERS/LOCAL_HOST/REASSEMBLY_TIMER
/SMALL_BUFFERS/TCP_QUOTA/UDP_QUOTA

  Used by the system manager to give a nonprivileged user the ability
  to send broadcast packets over the network.

  Format
    SET COMMUNICATION /[NO]BROADCAST

  Use this qualifier to enable/disable checksum validation of messages.
  There are three options:

  [NO]IP    Checksum validation is to be performed at the IP level
  [NO]TCP   Checksum validation is to be performed for TCP messages
  [NO]UDP   Checksum validation is to be performed for UDP messages

  The default is that checksum validation is to be performed  for  all
  messages.

  Format:
    SET COMMUNICATION /CHECKSUM=option_list

  A cluster can be thought of as a chain of hosts  which  respond  to
  internet  messages.  The cluster_timer specifies the maximum number
  of minutes in which a particular host in the chain has  before  the
  message is passed to the next host.

  Format:
    SET COMMUNICATION /CLUSTER_TIMER=number

  Specifies the maximum number of device_sockets

  Format:
    SET COMMUNICATION /DEVICE_SOCKETS=number

  Specifies whether or not IP messages are to be forwarded.

  Format:
    SET COMMUNICATION /[NO]FORWARD

  The VMS/ULTRIX Connection Internet driver is serviced by the VMS
  Ethernet driver through request packets that are allocated from VMS
  nonpaged pool.

  The /IRP qualifier specifies quotas for the number of internet
  request packets.

  NOTE: If the number of Internet Request Packets in the system has
        reached the quota, the process  that  is  serviced  by  the
        Internet driver is either put in a wait stat (resource mode
        wait is enabled), or the I/O request  is  aborted  with  an
        SS$_EXQUOTA status.

  There are two options:

  MAXIMUM:number  Specifies the maximum number of IRPs which will be
                  allocated by the Internet driver.

  FREE:number     The Internet driver maintains a cache of free IRPs.
                  This option is used to set the size of this  cache.
                  When  the  Internet  driver  is  started,  it  will
                  preallocate the specified number of IRPs  from  VMS
                  nonpaged pool.

  Format:
    SET COMMUNICATION /IRP=option_list

  The Internet software maintains a set of large buffers to be  used
  for storing data.   There  are  two  types;  static  and  dynamic.
  Static buffers are allocated when the Internet software is started
  and not deallocated until a STOP  COMMUNICATION command is issued.
  Dynamic buffers are  additional  buffers  that  the  software  may
  require in order to  hold messages before they can  be  processed.
  The number of buffers used depends on the  load  on  the  Internet
  software.  Failure  to  specify  enough  buffers  will  result  in
  messages being dropped at peak  loads.  A  large  buffer  is  1536
  bytes in length.

  There are two options for setting large buffers

  MIN:number     Specifies the number of static buffers
  MAX:number     Specifies the total  static and dynamic buffers.

  Format:
    SET COMMUNICATION /LARGE_BUFFERS=option_list

  Specifies the local host name.

  Format:
    SET COMMUNICATION /[NO]LOCAL=host_name

  Specifies the maximum amount of time which will  be  spent  trying
  to reassemble  a  message  which  was  received  from  the network
  if the message had to be fragmented.

  Format:
    SET COMMUNICATION /REASSEMBLY_TIMER=number

  The Internet software maintains a set of small buffers to be used
  for storing control information.  There are two types; static and
  dynamic.  Static buffers are allocated when the Internet software
  is started and not deallocated until a STOP COMMUNICATION command
  is issued.  Dynamic  buffers  are  additional  buffers  that  the
  software may require in order to hold messages before they can be
  processed.  The number of buffers used depends on the load on the
  Internet software.  Failure to specify enough buffers will result
  in messages being dropped at peak loads.

  A small buffer is 128 bytes in length.  Typically, you would want
  to allocate 3 times more small buffers than large buffers.

  There are two options for setting large buffers

  MIN:number     Specifies the number of static buffers
  MAX:number     Specifies the total static and dynamic buffers.

  Format:
    SET COMMUNICATION /SMALL_BUFFERS=option_list

  Specifies the queue size (in bytes) for TCP messages
  There are two options

  RECEIVE:number  Specifies the receive queue size
  SEND:number     Specifies the send queue size

  Format:
    SET COMMUNICATION /TCP_QUOTA=option_list

  Specifies the queue size (in bytes) for UDP messages

  There are two options

  RECEIVE:number  Specifies the receive queue size
  SEND:number     Specifies the send queue size

  Format:
    SET COMMUNICATION /UDP_QUOTA=option_list

  This command is used to define or modify the host database on
  the local system.  It provides maintenance for both the local
  and remote hosts.  In terms of the ULTRIX environment,   this
  would involve the maintenance of the /etc/hosts file.

  Use SET NOHOST to remove one or more hosts from the network.

  Format:
    SET [NO]HOST host_name

Additional information available:

/ADDRESS/ALIAS/CONFIRM

  Defines the Internet address of a particular host.

  Format:
    SET HOST host_name /ADDRESS=Internet_address

  An alias is a means of referencing a host by several different host
  names.  This is provided for convenience.

  Use the /NOALIAS qualifier to delete all or any particular aliases.

  This qualifier is not available for SET NOHOST

  Format:
    SET HOST host_name /[NO]ALIAS=[host_name_list]

  Use the /NOCONFIRM qualifier to disable confirmation before removal
  of a host record.

  Format:
    SET NOHOST host_name /[NO]CONFIRM

  This command is used to define the communication interface(s)
  residing  on  the  local  host.   The  interface  is  defined
  by associating an Internet address with the interface name.

  In terms of the ULTRIX environment, this  command  implements
  the IFCONFIG utility and  involves  the  maintenance  of  the
  following files:

     /etc/rc
     /etc/rc.local

  The system manager can use this command either to define a new
  network interface, or modify the  parameters  of  an  existing
  interface.

  Use the SET NOINTERFACE  command  to  remove  a  communication
  interface from the network.

  The supported internet device names are: DE, QE, SE, and NI.

  Format:
    SET [NO]INTERFACE Internet_device_name

Additional information available:

/ACTIVE/ADDRESS/ARP/BROADCAST_MASK/C_ADDRESS
/C_BROADCAST_MASK/C_NETWORK_MASK/CLUSTER/HOST
/LOOPBACK/NETWORK_MASK/TRAILER/RECEIVE_BUFFERS

  Sets the state of the interface to active or inactive.  If the
  interface is given  an  address  via  the  /HOST  or  /ADDRESS
  qualifiers, then the default is /ACTIVE, otherwise the default
  is /NOACTIVE.

  Format:
    SET INTERFACE Internet_device /[NO]ACTIVE

  Specifies the Internet address of the local host which will be
  using this interface in order to communicate via the  Ethernet.
  This qualifier cannot be used with the /HOST qualifier

  Format:
    SET INTERFACE Internet_device /ADDRESS=internet_address

  See SET ARP for a description of the Address Resolution Protocol.

  The /NOARP qualifier would not normally be used.

  Use this  qualifier to  enable  or  disable  Internet-Ethernet
  address mapping between network level addresses and link level
  addresses.  The default is that ARP will be used.

  Format:
    SET INTERFACE Internet_device /[NO]ARP

  A broadcast address has a special  meaning:  whenever a message  is
  transmitted to the broadcast address,  every system on the  network
  which specifies this address as its broadcast_mask will receive the
  message.

  The /BROADCAST_MASK qualifier is the means by which  the  broadcast
  address is made known to the network interface.

  Format:
    SET INTERFACE Internet_device /BROADCAST_MASK=Internet_address

  A VAXcluster can be configured so that the whole  cluster  appears
  to  remote  network  hosts  as  though  it  were  a  single  host.
  This is implemented by means of the  Internet  routing  mechanism.

  The Internet VAXcluster is identified by a host name (see /CLUSTER)
  or a cluster address,  and  must  be  activated  on  each  of  the
  hosts that will comprise the Internet VAXcluster.  Not all members
  of a VAXcluster need participate in the Internet VAXcluster.

  Use the /C_ADDRESS qualifier to specify the address of the cluster
  host.

  This qualifier cannot be used with /CLUSTER

  Format:
    SET INTERFACE Internet_device /C_ADDRESS=Internet_address

  Specifies the cluster broadcast address

  Format:
    SET INTERFACE Internet_device /C_BROADCAST_MASK=Internet address

  Specifies the cluster network mask

  Format:
    SET INTERFACE Internet_device /C_NETWORK_MASK=Internet address

  The Internet VAXcluster is identified by a host name or a  cluster
  address (see /C_ADDRESS), and must be activated  on  each  of  the
  hosts that will comprise the Internet VAXcluster.  Not all members
  of a VAXcluster need participate in the Internet VAXcluster.

  The /CLUSTER qualifier specifies the cluster host  name.  A  value
  is required, and cannot be used in combination with the /C_ADDRESS
  qualifier.

  Suppose that there are  two  members  of  a  VMS  cluster;  BRKLYN,
  GOLDEN, and the Internet VAXcluster host  name  is  DWHOAN.  First,
  the system manager would use the SET HOST command  to  define  each
  cluster member (BRKLYN and GOLDEN), as well as  the  cluster  name,
  DWHOAN.  Next, the system manager would use the /CLUSTER  qualifier
  when defining the  Internet  interface  of  each  of  the  Internet
  VAXcluster members.

  For example: SET INTERFACE se /HOST=brklyn /CLUSTER=dwhoan

  The /NOCLUSTER  qualifier  is  used  to  disable  Internet  cluster
  processing on the specified interface.  It does not take  a  value,
  and can not be specified with any other qualifier.

  NOTE:  If /NOCLUSTER is specified,  active  communication  will  be
         aborted for any applications which were bound to the cluster
         alias name.

  Format:
    SET INTERFACE Internet_device /CLUSTER=host_name  or
    SET INTERFACE Internet_device /NOCLUSTER

  Specifies the name  of  the  local  host  which  will  be  using
  this interface in order to communicate via the Ethernet.

  Format:
    SET INTERFACE Internet_device /HOST=host_name

  Specifies that the interface is to perform loopback communication.
  In loopback communication, data packets are sent out and received
  on the same interface without going over the  network.   Loopback
  communication allows the  system  manager  to  test  the  network
  software on the local host without  affecting  the  rest  of  the
  network.

  If the interface is already active the system manager must  first
  deactivate the interface  by  using  the  SET  INTERFACE/NOACTIVE
  command.    Next,  select  loopback  testing   by   issuing   the
  SET  INTERFACE/LOOPBACK   command,  and  finally   activate   the
  interface using the SET INTERFACE/ACTIVE command.

  The default is /NOLOOPBACK.

  Format:
    SET INTERFACE Internet_device /[NO]LOOPBACK

  Defines the interface's network mask

  Format:
    SET INTERFACE Internet_device /NETWORK_MASK=Internet_address

Additional information available:

Explanation

  The network mask specifies how much of the host field of an Internet
  address is to  be  reserved  for the subnetwork part of the address.
  This mask is specified in the same format as an Internet address  in
  that there are four fields.

               field.field.field.field

  The value of each of these fields is usually either 255 or zero.  Each
  field of the network_mask which has a value of 255 tells the system to
  interpret the corresponding host field of the Internet  address  as  a
  subnetwork  address.  Each field of the network_mask which has a value
  of zero tells the system to interpret the corresponding host field  of
  the Internet address as a host address.

  The number of fields in the Internet address that make up the  network
  identification is determined by the Internet address class type.

  For example, if the Internet address is class B, the first two  fields
  refer  to  a  network  number,  and  the  last  two  fields refer to a
  subnetwork or a host.  If the network mask is 255.255.255.0, then  the
  entire  Internet  address  will be interpreted as having the first two
  fields refer to the network, the next field refers to the  subnetwork,
  and the last field refers to the host.

  NOTE:  Every host on the same network must have the same network_mask.

  The /TRAILER qualifier  enables  the  use  of  a  trailer  link  level
  encapsulation when sending a message.  If a network interface supports
  trailers, the system when possible, encapsulates outgoing messages  in
  a manner that minimizes the number of memory-to-memory copy operations
  performed by the receiver.

  In order to use  trailer  encapsulation,  all  systems  involved  must
  support the trailer protocol.

  Setting /NOTRAILER disables the encapsulation.
  /NOTRAILER is the default.

  Format:
    SET INTERFACE Internet_device /[NO]TRAILER

  Specifies the number of buffers that are  pre-allocated  by  the  VMS
  Ethernet driver for receiving Internet packets on the  interface.  It
  It has a range of 1 to 255.  The default is 10.

  Format:
    SET INTERFACE Internet_device /RECEIVE_BUFFERS=number

  This command is used to configure the BIND name resolver.  The
  /SYSTEM qualifier is used to modify system wide parameters
  These parameters are:
        ENABLE    Allows UCX applications access to the BIND resolver
        DISABLE   Disallows BIND resolver access
        DOMAIN    Used to define the local domain
        SERVER    Used to define the known servers
        TRANSPORT Used to select the communication transport

  If the /SYSTEM qualifier is not specified, then modification to the
  BIND resolver parameters will be used by the current process only.
  The parameters which may be specified without the /SYSTEM qualifier
  are:
        DOMAIN
        SERVER
        TRANSPORT

  NOTE: the BIND resolver cannot be enabled if the SERVER and
        DOMAIN system parameters have not been defined.

Additional information available:

DOMAINDISABLEENABLESERVERTRANSPORT

  Used to specify the local DOMAIN.

  Use the /NODOMAIN qualifier to delete your process definition (and
  therefore, reset to the system definition for the local domain).
  The /NODOMAIN qualifier cannot be used with the /SYSTEM qualifier

  Format
    SET NAME_SERVICE /[NO]DOMAIN="x.y.z"

  Disables the BIND resolver.  This qualifier may be specified only with
  the /SYSTEM qualifier.

  Format:
    SET NAME_SERVICE /DISABLE/SYSTEM

  Enables the BIND resolver.  This qualifier may be specified only with
  the /SYSTEM qualifier.

  Format:
    SET NAME_SERVICE /ENABLE/SYSTEM

  Defines the BIND servers to which requests will be made.  The order
  in which you specify the servers determines server preference.  For
  example, the first server in the list will be accessed first.  If
  that server does not respond, then a request will be sent to the
  second server in the list, and so on.

  A server may be specified by its name or its address; however, if
  the server is specified by name, that name must be registered in the
  local UCX$HOST database.

  If a server list is already defined, then new servers specified with
  the /SERVER qualifier will be appended to the end of the list.

  Use the /NOSERVER qualifier to delete one or more servers from the
  list.  Use /NOSERVER without a value to delete all servers from the
  list; however, this form of the qualifier cannot be specified with
  the /SYSTEM qualifier.  There must be at least 1 system server defined.

  Format:
    SET NAME_SERVICE /[NO]SERVER=(server1, server2)

  Use the /TRANSPORT qualifier to change the Internet protocol used to
  communicate with the BIND resolver.

  The supported protocols are TCP and UCP.  The default is UDP.

  Format:
    SET NAME_SERVICE /TRANSPORT=protocol

  This command allows the system manager to assign a network name to a
  network  number.   This function implements the ULTRIX /etc/networks
  file.

  Use SET NONETWORK to remove 1 or more hosts from the network.

  Format:
    SET [NO]NETWORK network_name

Additional information available:

/ADDRESS/ALIAS/CONFIRM

  Specifies the internet address for the named network.

  Format:
    SET NETWORK network_name /ADDRESS=internet_address

  An alias is a means of referencing a network by  several  different
  network names.  This is provided for convenience.

  Use the /NOALIAS qualifier to delete any or all alias names for the
  network.

  The /ALIAS qualifier is not available for SET NONETWORK

  Format:
    SET NETWORK network_name /[NO]ALIAS=network_name[,...]

  Use the /NOCONFIRM qualifier to disable confirmation before removal
  of a network record.  The default is /CONFIRM for a wildcarded
  delete.

  Format:
    SET NONETWORK network_name /[NO]CONFIRM

  The SET NFS_SERVER command is used to modify the characteristics of
  the active NFS server.  The NFS server must first have been started
  by running SYS$MANAGER:UCX$NFS_STARTUP.COM.

  Format:
    SET NFS_SERVER

Additional information available:

/DISABLE/ENABLE/GID_DEFAULT/INACTIVITY_TIMER/THREADS
/UID_DEFAULT/XID

  This qualifier is used to disable reporting.  There are two options:

  ERROR     Disables error logging
  OPCOM     Disables reporting to operator console

  Format:
    SET NFS_SERVER /DISABLE=reporting_list

  This qualifier is used to enable reporting.  There are two options:

  ERROR     Enables error logging
  OPCOM     Enables reporting to operator console

  Format:
    SET NFS_SERVER /ENABLE=reporting_list

  Specifies the GID associated with the superuser.

  Format:
    SET NFS_SERVER /GID_DEFAULT=gid

  The INACTIVITY_TIMER specifies that opened files  will  be  closed
  if they are not accessed within the specified period of time.  The
  The time unit is expressed as MM:SS, where MM is minutes and SS is
  seconds.

Format:
    SET NFS_SERVER /INACTIVITY_TIMER=MM:SS

  Specifies the maximum number of simultaneous requests which can be
  processed by the NFS server.

  Format:
    SET NFS_SERVER /THREADS=number

  Specifies the UID associated with the superuser.

  Format:
    SET NFS_SERVER /UID_DEFAULT=uid

  Specifies the maximum buffer allocation for XID (transmission request
  identifier) caching.

  Format:
    SET NFS_SERVER /XID=number

  The SET ROUTE command is not normally used.

  This command is the means by which static (or dynamic) host or network
  routing is provided.   Use  this  command to force a specific routing
  path to the specified host or network.  Use the SET NOROUTE command to
  remove static (or dynamic) routing information.

  The database to be modified (static or dynamic) changes depending on
  the state of the Internet software.  If dynamic routing is active, then
  the default is to modify the dynamic routing tables.

  If the /PERMANENT qualifier is used, or the Internet is not active,
  then the UCX$ROUTE static database will be modified.

Additional information available:

Explanation

/ADDRESS/DEFAULT/G_ADDRESS/GATEWAY/NETWORK/PERMANENT

  Suppose you have the following network configuration:

                             --------------------------------
                             HOST            Internet ADDRESS
                             --------------------------------

                             BRKLYN          100.45
                             GOLDEN          100.42
                             GOLDEN_GATE     101.42
                             DWHOAN          101.81

  Suppose further that you would like to send  a  message  from  BRKLYN,
  which  resides on network 100 to DWHOAN, which resides on network 101.
  It is possible to provide this specific route because on network  100,
  GOLDEN_GATE is a gateway to network 101.  You make this route known to
  the system by issuing the  following  command  from  the  local  host,
  BRKLYN:

               SET ROUTE DWHOAN /GATEWAY=GOLDEN_GATE

  This function implements the ULTRIX /etc/route file


  Format:
    SET [NO]ROUTE [destination]

  For UCX V1.3 and later releases:
    1.  The destination parameter may take a name or an address as
        a value.

    2.  The /GATEWAY qualifier may take a name or an address as a
        value.

  Specifies the destination internet address.  This may be the address
  of  either  a host or a network.  UCX will  determine  whether  this
  address is for a host or network.

  Format:
    SET [NO]ROUTE /ADDRESS=destination internet_address

  This qualifier is not needed for UCX V1.3 and later releases.
  The destination address may be specified in the destination parameter.

  Specifies the "default route".  If all attempts to send packets to
  a destination fail, then the packets will be sent to the named
  gateway.

  This qualifier cannot be used with the DESTINATION parameter or
  /ADDRESS qualifier.

  Format:
    SET [NO]ROUTE /DEFAULT /GATEWAY=gateway

  Specifies the gateway internet address. You should either use the
  /G_ADDRESS or the /GATEWAY qualifier to identify the gateway
  host.

  Format:
    SET [NO]ROUTE [destination_name] /G_ADDRESS=gateway internet_address

  This qualifier is not needed for UCX V1.3 and later releases.
  The gateway address may be specified with the /GATEWAY qualifier.

  Specifies the gateway host name or address.  If a name is specified,
  it must first have been defined by using the SET HOST command.

  Format:
    SET [NO]ROUTE [destination] /GATEWAY=gateway name or address

  Use this qualifier to identify a destination route to be a network
  route whenever the route is specified using an Internet address.

  UCX classifies the internet address - based solely on internet rules.
  For example, the address 128.45.2.0 is assumed to be a host address.
  If the network mask is 255.255.255.0, this is an incorrect
  classification.

  Use the /NETWORK qualifier in order to specify that the route is for
  a network destination.

  Format:
    SET ROUTE destination_internet_address /NETWORK
              /GATEWAY=gateway_name

  This qualifier is used to specify that the static route database is
  to be modified.

  If dynamic routing is active, the default is for the SET ROUTE command
  to modify the dynamic routing database.

  Format:
    SET ROUTE destination /GATEWAY=gateway /PERMANENT