Configuring the SNA Node and Link

For display only. The NMMGR branch you are in.

The name of the new SNA node you are configuring or the existing node whose configuration you are modifying. The name can be up to eight alphanumeric characters long; the first character must be alphabetic.

Host Configuration:

The new name of an existing SNA node. The name can be up to eight alphanumeric characters long, the first character must be alphabetic.

Host Configuration:

Once you have entered the new name, press [f4] (Rename), the node is then renamed.

For display only. The names of the SNA nodes that have been configured. You can configure a maximum 36 nodes in a configuration file. Note that a maximum eight nodes can be active at a time; however, to make this possible, a multi-drop line must be used.

For display only. The name of the configuration file.

Once you have entered the name of the node, press [f5] (Add) if this is a new node, or press [f6] (Modify) if you are modifying an existing node. This places you at Figure 2-3 “SNA Node Configuration Screen”

For display only. The NMMGR path to this screen. It includes the name of the SNA node you are configuring.

Required. The type of communications link the node is being configured for.

Values: SDLC, X.25, TOKEN, or SDLCMUX.

Default: SDLC

Required. The type of node being configured. If you are configuring a T2.0 node, enter 2.0. If you are configuring a T2.1 node, enter 2.1.

If you are configuring a node for SNA/X.25 Link, you must enter 2.0 in this field.

If you are configuring a node for SNA/Token Ring Link, enter 2.1 in this field.

Values: 2.0 and 2.1

Default: 2.0

Host Configuration:

If you entered 2.0 in the Node Type field, this field must be blank. If you entered 2.1 in the Node Type field and one or more dependent LUs are configured, enter Y. If you entered 2.1 in the Node Type field and no dependent LUs are configured, enter N.

Default: Blank (the node is T2.0)

Information about the Physical Unit (PU).

(Token Ring only) Required for APPC over Token Ring Link. The name by which the HP e3000 node is known to the remote system.

Host Configuration: HP recommends that you use the PU name (the SNA Node Name field in the SNA Node Configuration screen) in this field.

AS/400 Configuration: For APPN, the RMTCPNAME in the APPC display controller description must match this field, refer to Table 2-10 “AS/400 Parameter Values for Token Ring Link ”. Otherwise, HP recommends that you use the PU name (the SNA Node Name field in the SNA Node Configuration screen) in this field.

For display only. The name of the configuration file.

Once you have entered all of the PU information, press [f6] (Save Data).

After the information is saved, if you need to configure LU information, press [f2] (Go To LUDATA); this places you at Figure 2-5 “LU Data Screen”

If you need to configure link information, press [f1] (Go To LINKDATA). If you specified SDLC for the Link Type field on Figure 2-4 “PU Data Screen” you are placed at Figure 2-7 “SDLC Link Data Screen” If you specified X.25 for the Link Type field, you are placed at Figure 2-8 “X.25 Link Data Screen” If you specified TOKEN for the Link Type field, you are placed at Figure 2-11 “Token Ring Link Data Screen” Each of the screens are described later in this chapter.

If you do not need to configure LU information or link information, press [f8] (Prior Screen) until you get to the screen you need next.

For display only. The NMMGR path to this screen. It includes the name of the SNA node you are configuring.

Information about the LUs to be configured for this node. You can configure a maximum 256 LUs for each node.

For display only. The name of the configuration file.

Note that you can enter LU information on up to eight pages of this screen. Each page contains 32 LU Name and LU # fields You do not have to fill all of the fields on a page before pressing [f1] (Next Page), [f2] (Prev Page), [f3] (First Page), or [f4] (Last Page) to display another page of the screen for entering information. That is, partially filled pages are allowed.

Once you have entered information for all of the LUs, do one of these two things:

After the information is saved, if you need to configure link information, press [f8] (Prior Screen) until you get to Figure 2-4 “PU Data Screen” Then, press [f1] (Go To LINKDATA). If you specified SDLC for the Link Type field on the "PU Data screen", you are placed at Figure 2-7 “SDLC Link Data Screen” If you specified X.25 for the Link Type field, you are placed at Figure 2-8 “X.25 Link Data Screen” If you specified TOKEN for the Link Type field, you are placed at Figure 2-11 “Token Ring Link Data Screen”

If you do not need to configure link information, press [f8] (Prior Screen) until you get to the screen you need next.

Required. The Path field is the current physical path for the adapter card as specified in the NMCONFIG configuration file.

Note: On PCI SDLCMUX links, the physical path generally has more components and is a "longer" path (e.g., 0/6/0/1.2, which includes the port number 2) along with the port number associated with that link. The output for PCI links is different from HP-PB.

Required. V.25bis is a ITU-T specification for a modem command language and overall modem behavior. It includes both asynchronous and synchronous command interfaces.

Hayes is the dialing standard for asynchronous modems. Hayes includes V.25bis in its ULTRA modems to support synchronous out-dial facilities of host computers and to support the evolution of synchronous communications software on PCs.

Required. This defines the HP e3000's link station identifier to the remote system's communications controller.

Range: 01-FE (hexadecimal)

Host Configuration: The ADDR operand of the PU macro must match this field, refer to Table 2-1 “Host ACF/NCP and ACF/VTAM Values for SDLCMUX”.

AS400 Configuration: The STNADR parameter in the controller description must match this field, refer to Table 2-1 “Host ACF/NCP and ACF/VTAM Values for SDLCMUX”.

Required. The Receive timeout field is the current value of the T1 timer. The T1 timer waits the specified number of hundredths-of-seconds for a particular frame to be acknowledged. A frame that is transmitted, but not acknowledged, before the T1 timer expires, is retransmitted.

Range: 1-63 seconds

Required. The Transmission Speed field displays the current transfer rate, or clocking, configured for the node in the NMMGR Link screen. If modems are used, the modems will control the clocking. The ACC card transmits at the clocking setting of the modem and ignores the value configured in this field.

Range: 1200-2048000 bps

Required. The N2 field is the maximum number of times a frame is retransmitted after the SDLC Parm T1 expires. The frame is retransmitted at the SDLC Parm T1 interval for the number of times specified in this field. When this count is depleted, the frame is retransmitted at T1 second intervals. If no response is received after these transmissions, the link is brought down.

A node that is configured with the value specified in SDLC Configuration Parameters output will attempt to retransmit an unacknowledged frame a maximum of 15 times at T1 intervals.

Range: (1-15)

Required. The Physical Interface field displays the cable type that is currently connected to the PSI card, This data is to be configured through NMMGR. The possible values are:

0 = RS-232

1 = V.35

Required. The Transmit Window size (K field) is the configured number of unacknowledged frames that are allowed in the network at any given time. For example, if this value is set to seven (7) for a node, and that node transmits seven (7) packet frames onto the network, it cannot transmit another frame until one or more of the transmitted frames are acknowledged.

Range: 1-7

Required. The Connect Timeout is the current logical link level 2 connection timeout. The Connect Timeout parameter sets the amount of time a node will wait for a logical connection to a remote node to be established. If this timer expires, the node aborts the connection attempt. The abort process can take several additional seconds.

Range: 5-900 seconds

Required. The Clock source field defines the clocking mode. The possible types of clocking source are:

0 = internal

1 = external)

Required. The Adapter Timeout is the value specified for the Adapter timer. This timer, also called a heartbeat timer, is used to monitor whether the system and/or the ACC card are functioning. The ACC card, and the system, transmit a signal, called a heartbeat signal, to each other on a specified schedule. If for example, the heartbeat does not arrive at the ACC card from the system (or vice-versa), the card or system waits the number of seconds specified by this field. If no heartbeat arrives before this timer expires, the link is dropped. You can determine whether the ACC card or the system failed by checking to see which device is still active. The default for this field is 60 seconds and it is recommended that you do not change the value of this field.

Range: 5-900 seconds or 0

Required. Intended primarily for use with certain European public telephone systems. If set, the driver will periodically attempt to hang up the local modem phone line, then resume awaiting a connection. This recovers from situations in which a human or incompatible modem accidentally dialed in during the time period, but the local modem failed to hang up on its own after failing to establish a connection. If a connection is successfully established, the timer is cancelled. When zero, the feature is disabled.

Default: 0

Range: 5-900 seconds

Required. Enter 1 to enable the Non Return to Zero Inverted (NRZI) feature; 0 to disable it.

Host Configuration: The NRZI operand of the LINE macro must match this field.

Default: 0

Yes or No

If Y (yes) to Trace at startup, specify the trace file name.

Yes or No

The number you want the link to dial into.

For display only. The NMMGR path to this screen. It includes the name of the SNA node you are configuring.

Required. The address of the PSI. At system start-up time, this address is assigned according to the slot the PSI is in. The value you enter here is determined by one of these formulas:

Required. The number of seconds the SDLC link driver will wait for the remote system poll before closing the line. If 0 is specified, no timeout occurs.

Range: 0, 30-1800 (integer)

Recommended value: 180 (30 in Europe)

Default: 180

Required. The number of seconds the SDLC link driver waits for PSI card activity, before informing SNA Transport that the PSI is down and the link driver is going down.

Note that the PSI card waits 20 seconds longer (than the value specified here) for SDLC link driver activity before bringing down the link and reporting a failure. This avoids unnecessary use of dial-up lines, which avoids excessive phone charges. (Note that since no driver activity is taking place, the driver probably will not receive the failure notice.)

If 0 is specified, no timeout occurs.

Range: 0, 30-900 (integer)

Recommended value: 30

Default: 30

Required. The number of seconds the SDLC link driver will wait for a link Set Normal Response Mode (SNRM) command after telling the PSI to enable the Data Terminal Ready (DTR) signal, before closing the line. This includes time waiting for either the autodialer or the operator to dial the remote phone number. If 0 is specified, no timeout occurs.

If you are using a manual-dial modem, we recommend that you specify either 0 (no timeout) or 900 (the maximum wait). You can begin to dial after this logging message is displayed on the console after issuing SNACONTROL START:

Node NodeName ready for activation by host

Note that if you are using a manual-dial modem, console logging must be enabled for SNA Transport logging class CLAS0013, so that the above message can be displayed (see Chapter 3 “Logging Configuration”)

Range: 0, 30-900 (integer)

Default: 900

Required. The maximum number of times the SDLC link manager will retry after errors or timeouts before setting the line to idle.

Range: 1-999 (integer)

Default: 7

Required. The line transmission speed (bits per second). This value is overridden by the modem, if one is used. For direct-connect, the speed must be supported by the cable.

Values: 1200 2400 4800 9600 19200 38400 56000 64000 (integer)

Default: 9600

Host Configuration: The SPEED operand of the LINE macro must match this field, refer to Table 2-1 “Host ACF/NCP and ACF/VTAM Values for SDLCMUX”.

AS/400 Configuration: The LINESPEED parameter in the line description must match this field, refer to Table 2-7 “Host Macro Values for Token Ring ”.

Required. Enter Y to enable the Non-Return to Zero Inverted (NRZI) feature; N to disable it (and enable Non-Return to Zero [NRZ]).

Default: N

Host Configuration: The NRZI operand of the LINE macro must match this field, refer to Table 2-1 “Host ACF/NCP and ACF/VTAM Values for SDLCMUX”.

Required. This defines the HP e3000's link station identifier to the remote system's communications controller.

Range: 01-FE (hexadecimal)

Host Configuration: The ADDR operand of the PU macro must match this field, refer to Table 2-1 “Host ACF/NCP and ACF/VTAM Values for SDLCMUX”.

AS/400 Configuration: The STNADR parameter in the controller description must match this field, refer to Table 2-7 “Host Macro Values for Token Ring ”.

Required. Enter Y only if you are using an auto-dial modem and you want the modem to dial at link startup time; N if a leased line, a manual-dial modem, or no modem is used, or if you are using an auto-dial modem but you want to defer dialing until the SNACONTROL AUTODIAL command is issued (refer to Chapter 6 “MPE Commands”)

Default: N

The number you want the link to dial into. Note that you specify this field only if you are using an auto-dial modem.

Allowable Characters:

	NOTE: Only 34 characters can be entered. So, if you have more than one access number to dial, you might not be able to use the dash (-) spacing character.

Example:

Suppose this is typed in the Phone Number field:

9-DD-415-555-3216

For display only. The name of the configuration file.

Once you have entered the SDLC link information, press [f6] (Save Data).

After the information is saved, press [f8] (Prior Screen) until you get to the screen you need next.

For display only. The NMMGR path to this screen. It includes the name of the SNA node you are configuring.

Required. The NS network interface that the X.25 link will use. The name can be up to eight alphanumeric characters long; the first character must be alphabetic. See the appropriate NS documentation for more information.

X.25 System Access Configuration: An NI name in the Configured Network Interfaces field of the "Network Interface Configuration" screen must match this field.

Required. The number of minutes that the QLLC module will wait between incoming packets. The timer is reset each time a packet is received. If the specified number of minutes elapses before the next packet arrives, the virtual circuit is cleared and then released. For an incoming SVC, this results in a recoverable link failure. If 0 is specified, the timer is disabled. This can result in an indefinite period of inactivity; however, note that it might be desirable to disable the timer for permanent virtual circuits (PVCs).

Range: 0-32767 (integer)

Default: 0

Required. The type of virtual circuit to be used to connect to the host: permanent virtual circuit (PVC) or switched virtual circuit (SVC). The X.25 network subscription information and the host NPSI configuration should be used to determine the type of virtual circuits that are available for this connection.

If you specify PVC, you must also specify the PVC Number field (see below).

If you specify SVC, you must also specify the Remote's X.25 Network Address and Call Direction fields (both fields are described later in this chapter).

Values: PVC and SVC

Host Configuration:

Information about the permanent virtual circuit (PVC).

Conditionally required. The number identifying the permanent virtual circuit that will connect the HP e3000 node to the remote system. This is found in the X.25 network subscription information, and is equivalent to the Logical Channel Number (LCN).

This field is required only if PVC is entered for the Virtual Circuit Type field.

Range: 0-4095 (integer)

X.25 System Access Configuration: If you configured a specific address key for the SNA/X.25 PVC (in the PVC Number field of the "X.25 PVC Address Key Paths" screen), that address key must match the value specified in this field, refer to Figure 2-9 “PVC Configuration Dependencies ”.

DTC Manager Configuration: The range specified for the LCI Range field (for PVCs) of the "DTC Manager DTCX25 Board # Level 3" screen must contain the value specified in this field.

DTS Configuration: The range specified for the LCI Range field (for PVCs) of the "DTS X.25 Card Config — Level 3 &Miscellaneous" screen must contain the value specified in this field.

Information about the switched virtual circuit (SVC).

Conditionally required. The X.25 network address of the remote system. This is found in the X.25 network subscription information.

This field is required only if SVC is entered for the Virtual Circuit Type field.

Host Configuration: If the host is configured to make outgoing calls, the DIALNO operand value of the PATH macro that defines the dial-out path to the HP e3000 node must contain the value specified in this field, refer to Table 2-3 “Host Macro Values for X.25 Link SVC ”. For security purposes, SNA/X.25 Link compares the remote X.25 address contained in incoming calls with the value specified in this field. See the HP SNA Products Remote System Configuration Guide for more information about host configuration. Also, the features and names of the facility sets are found in the X.25 network subscription information.

Note that the facility set (the set of virtual circuit features and security attributes associated with the SVC) configured on the remote system must also be configured for the NS X.25 system link.

AS/400 Configuration: The NETADDR parameter in the line description must match this field, refer to Table 2-8 “AS/400 Parameter Values for SDLC Link ”.

X.25 System Access Configuration: The facility set that the SNA/X.25 SVC will use must be configured for the NS X.25 system link. If you followed our recommendation and reserved the facility set for the SNA/X.25 SVC, the X.25 Address you specified in the "X.25 SVC Address Key Paths" screen must be the same as the address you specify in this field, refer to Figure 2-10 “SVC Configuration Dependencies ”.

Conditionally required. Enter IN if the HP e3000 will wait for the remote system to request a connection (incoming direction); OUT if the HP e3000 will initiate the connection (outgoing direction).

If you specify OUT, you might need to specify the Maximum Call Retries and Call Retry Delay fields. These fields are described below.

This field is required only if SVC is entered for the Virtual Circuit Type field.

	NOTE: Only one incoming SVC is supported per system.

Values: IN and OUT

Recommended value: OUT

Default: OUT

Host Configuration:

Conditionally required. The maximum number of times the QLLC module will try to connect to the remote system without success. If 0 is specified, the QLLC module will not retry if the first attempt to connect fails.

This field is required only if SVC is entered for the Virtual Circuit Type field.

If you specify a value greater than 0, you must also specify the Call Retry Delay field.

Note that this field is valid only when OUT is specified for the Call Direction field.

Range: 0-999 (integer)

Default: 3

Conditionally required. The number of seconds the QLLC module waits between attempts to connect to the remote system.

This field is required only if a value greater than 0 is specified for the Maximum Call Retries field.

Note that this field is valid only when OUT is specified for the Call Direction field (described earlier in this chapter).

Range: 60-999 (integer)

Default: 60

For display only. The name of the configuration file.

Once you have entered the X.25 link information, press [f6] (Save Data).

After the information is saved, press [f8] (Prior Screen) until you get to the screen you need next.

For display only. The NMMGR path to this screen. It includes the name of the SNA node you are configuring.

Required. The symbolic name of the Token Ring Card. The name must start with an alphabetical character.

	NOTE: If the same token ring card is being used for both NS and SNA communications, you must use the same name in this field as is configured for the NS link.

Required. The address of the Token Ring Card. At system start-up time, this address is assigned according to the slot in which the Token Ring Card resides.

	NOTE: If the same token ring card is being used for both NS and SNA communications, you must use the same value for this field as is configured for the NS link.

Required. The Service Access Point (SAP) for the remote system. This is a two-digit hexadecimal number that is a multiple of 4.

Host Configuration: For a 3745 remote system, the IDNUM and IDBLK values in the PU macro must also match the ID NUM and ID BLK fields shown in Figure 2-4 “PU Data Screen” on the HP e3000. For a 3174 or 3745 remote system, HP recommends that the value of this field be 04. While other values may work, a value of 04 has been verified to work.

AS/400 Configuration: The SSAP in the controller description for the AS/400 must match this field, refer to Table 2-10 “AS/400 Parameter Values for Token Ring Link ”.

Required. The SAP for the HP e3000 node. This is a two-digit hexadecimal number that is a multiple of 4. Each active node on an HP e3000 system must have a unique SAP.

AS/400 Configuration: The DSAP in the controller description for the HP e3000 must match this field, refer to Table 2-10 “AS/400 Parameter Values for Token Ring Link ”.

	NOTE: A Service Access Point (SAP) pair identifies a MAC type 2 connection. This pair consists of two SAPs: the destination SAP (DSAP) and the local SAP (LSAP). DSAP is the SAP of the remote computer and LSAP is the SAP of the local computer. The SAP pair, along with the remote and local station address, uniquely identifies a logical connection in the Token Ring network.

Required. The maximum number of frames that a MAC type 2 connection expects to receive before sending an acknowledgment.

Range: 1-127 (integer)

Default: 2

Required. The maximum number of times a MAC type 2 connection retransmits a frame before dropping the connection.

Range: 1-254 (integer)

Default: 10

Required. The maximum time, in tenths of a second, that the MAC type 2 connection waits before determining that a frame has been dropped and retransmitting.

Range: 1-254 (integer)

Default: 10 (1 second)

Required. The amount of time, in tenths of a second, that the MAC type 2 connection waits before initiating a Poll/Find (P/F) cycle.

Range: 1-600 (integer)

Default: 100 (10 seconds)

Required.

Host Configuration: The LOCADD parameter in the LINE macro must match this field, refer to Table 2-7 “Host Macro Values for Token Ring ”.

AS/400 Configuration: The ADPTADR in the line description for the AS/400 must match this field, refer to Table 2-10 “AS/400 Parameter Values for Token Ring Link ”.

Enter Y to use the factory-configured local station address. Enter N to use the address to be entered in the Local Station Address field. In most IBM environments, the local station address is assigned by the IBM system manager. This is necessary since connection establishment requires knowledge of remote addresses.

	NOTE: If the same Token Ring Card is being used for both NS and SNA communications, you must specify the local station address that is configured for the NS Token Ring Link.

Required (if N is specified in the Use Factory-Configured Local Station Address field.) For non-AS/400 communications, HP recommends that you use either the factory-configured address (enter Y in the Use Factory-Configured Local Station Address field) or use local station address for the NS Token Ring Link, if it is configured.

AS/400 Configuration: The ADPTADR in the controller description for the HP e3000 must match this field, refer to Table 2-10 “AS/400 Parameter Values for Token Ring Link ”.

	NOTE: If the same Token Ring Card is being used for both NS and SNA communications, you must use the local station address that is configured for the NS Token Ring Link.

For display only. The name of the configuration file.