Table Of Contents

DSPU and SNA Service Point Configuration Commands

dspu activation-window

dspu default-pu

dspu enable-host (QLLC)

dspu enable-host (SDLC)

dspu enable-host (Token Ring, Ethernet, Frame Relay, FDDI)

dspu enable-pu (Token Ring, Ethernet, Frame Relay, FDDI)

dspu enable-pu (QLLC)

dspu enable-pu (SDLC)

dspu host (Frame Relay)

dspu host (QLLC)

dspu host (SDLC)

dspu host (Token Ring, Ethernet, FDDI, RSRB)

dspu lu

dspu pool

dspu pu (Frame Relay)

dspu pu (QLLC)

dspu pu (SDLC)

dspu pu (Token Ring, Ethernet, FDDI, RSRB)

dspu rsrb

dspu rsrb enable-host

dspu rsrb enable-pu

dspu rsrb start

dspu start

lan-name

location

show dspu

show sna

sna enable-host (QLLC)

sna enable-host (SDLC)

sna enable-host (Token Ring, Ethernet, Frame Relay, FDDI)

sna host (Frame Relay)

sna host (QLLC)

sna host (SDLC)

sna host (Token Ring, Ethernet, FDDI, RSRB)

sna rsrb

sna rsrb enable-host

sna rsrb start

sna start

DSPU and SNA Service Point Configuration Commands

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This chapter describes the commands you use to configure the downstream physical unit (DSPU) feature, which provides a gateway facility for downstream System Network Architecture (SNA) physical units (PUs). For DSPU configuration tasks and examples, refer to the "Configuring DSPU and SNA Service Point Support" chapter of the Router Products Configuration Guide.

dspu activation-window

Use the dspu activation-window global configuration command to define the number of activation request units (RUs) and response messages (such as ACTLUs or DDDLU NMVTs) that can be sent without waiting for responses from the remote PU. Use the no form of this command to return to the default window size.

dspu activation-window window-size
no dspu activation-window

Syntax Description

window-size

Number of outstanding unacknowledged activation RUs. The default is 5.

Default

The default window size is 5 outstanding unacknowledged activation RUs.

Command Mode

Global configuration

Usage Guidelines

You do not typically need to define the number of activation RUs, but doing so can enhance activation performance in some situations. Increasing the DSPU activation window allows more LUs to become active in a shorter amount of time (assuming the required buffers for activation RUs are available). Conversely, decreasing the DSPU activation window limits the amount of buffers the DSPU can use during PU/LU activation. This command provides pacing to avoid depleting the router buffer pool during PU activation.

Example

In the following example, the DSPU activation window is configured to 10. The DSPU can send up to 10 activation RUs without a response from the remote PU. However, the DSPU cannot send any additional activation RUs until a response is received. The DSPU can only have 10 activation RUs awaiting response at any given time.

dspu activation-window 10

dspu default-pu

Use the dspu default-pu global configuration command to enable the default PU feature to be used when a downstream PU attempts to connect, but does not match any of the explicit PU definitions. Use the no form of this command to disable the default PU feature.

dspu default-pu [window window-size] [maxiframe max-iframe]
no dspu default-pu [window window-size] [maxiframe max-iframe]

Syntax Description

window window-size	(Optional) Send and receive window sizes used across the link. The range is 1 to 127. The default is 7.
maxiframe max-iframe	(Optional) Maximum size (in bytes) of an I-frame that can be transmitted or received across the link. The range is 64 bytes to 18,432 bytes. The default is 1472.

Defaults

The default window size is 7.
The default maximum I-frame size is 1472.

Command Mode

Global configuration

Usage Guidelines

If the DSPU default PU is not defined, a connection attempt by a downstream PU that does not match any explicit PU definition is rejected.

The dspu default-pu command must be followed by at least one dspu lu command to define which pool the default LUs will be assigned from. Note that default LUs cannot be defined as dedicated LUs from a host.

The maximum I-frame size includes the SNA transmission header (TH), request header (RH), and request unit (RU), but does not include the DLC header. The DSPU feature segments frames being transmitted to fit within this frame size. If an XID is received from a remote PU which indicates that it supports a different maximum I-frame size, then the smaller of the two values is used.

Example

In the following example, the default PU feature is enabled with a window size of 5 and a maximum I-frame size of 128. Each default PU can have up to 3 LUs assigned from the hostpool pool of LUs.

dspu pool hostpool host ibm3745 lu 2 254

dspu default-pu window 5 maxiframe 128

dspu lu 2 4 pool hostpool

Related Commands

dspu lu
dspu pool

dspu enable-host (QLLC)

Use the dspu enable-host interface configuration command to enable an X.121 subaddress for use by upstream host connections via QLLC. Use the no form of this command to disable the X.121 subaddress.

dspu enable-host qllc x121-subaddress
no dspu enable-host qllc x121-subaddress

Syntax Description

qllc	Required keyword for QLLC data link control.
x121-subaddress	The X.121 subaddress.

Default

No default X.121 sub-address is specified.

Command Mode

Interface configuration

Example

In the following example, X.121 subaddress 320108 is enabled for use by upstream host connections:

interface serial 0

encapsulation x35

x25 address 3202

x25 map qllc 320112

dspu enable-host qllc 320108

Related Commands

A dagger (†) indicates that the command is documented in another chapter.

dspu host (QLLC)
x25 map qllc^†

dspu enable-host (SDLC)

Use the dspu enable-host interface configuration command to enable an SDLC address for use by upstream host connections. Use the no form of this command to cancel the definition.

dspu enable-host sdlc sdlc-address
no dspu enable-host sdlc sdlc-address

Syntax Description

sdlc	Required keyword for SDLC data link control.
sdlc-address	SDLC address.

Default

No default SDLC address is specified.

Command Mode

Interface configuration

Example

In the following example, SDLC address c1 is enabled for use by upstream host connections:

interface serial 0

encapsulation sdlc

sdlc role secondary

sdlc address C1 

dspu enable-host sdlc C1

Related Commands

sdlc address
sdlc role

dspu enable-host (Token Ring, Ethernet, Frame Relay, FDDI)

Use the dspu enable-host interface configuration command to enable a local SAP on Token Ring, Ethernet, or Frame Relay interfaces for use by upstream hosts. Use the no form of this command to cancel the definition.

dspu enable-host [lsap local-sap]
no dspu enable-host [lsap local-sap]

Syntax Description

lsap	(Optional) Specifies that the local SAP will be activated as an upstream SAP for both receiving incoming connection attempts and for starting outgoing connection attempts.
local-sap	(Optional) Local SAP address. The default is 12.

Default

The default local SAP address is 12.

Command Mode

Interface configuration

Example

In the following example, the local SAP address 10 on Token Ring interface 0 is enabled for use by upstream host connections:

interface tokenring 0

dspu enable-host lsap 10

Related Commands

dspu host (Frame Relay)
dspu host (Token Ring, Ethernet, FDDI, RSRB)

dspu enable-pu (Token Ring, Ethernet, Frame Relay, FDDI)

Use the dspu enable-pu interface configuration command to enable an Ethernet, Frame Relay, Token Ring, or FDDI address for use by downstream PU connections. Use the no form of this command to disable the connection.

dspu enable-pu [lsap local-sap]
no dspu enable-pu [lsap local-sap]

Syntax Description

lsap local-sap

(Optional) Local SAP address used by the DSPU to establish connection with the remote host. The default local SAP address is 8.

Default

The default local SAP address is 8.

Command Mode

Interface configuration

Usage Guidelines

This command first appeared in Cisco IOS Release 10.3.

Example

The following example demonstrates the configuration of a downstream PU via Token Ring and Ethernet:

interface tokenring 0

ring-speed 16

dspu enable-pu lsap 8

interface ethernet 0

dspu enable-pu lsap 8

Related Commands

dspu pu (Frame Relay)
dspu pu (Token Ring, Ethernet, FDDI, RSRB)

dspu enable-pu (QLLC)

Use the dspu enable-pu interface configuration command to enable an X.121 subaddress for use by downstream PU connections via QLLC. Use the no form of this command to cancel the definition.

dspu enable-pu qllc x121-sub-addr
no dspu enable-pu qllc x121-sub-addr

Syntax Description

qllc	Required keyword for QLLC data link control.
x121-sub-addr	A variable-length X.121 address. It is assigned by the X.25 network service provider.

Default

No default address is assigned.

Command Mode

Interface configuration

Example

The following command enables an X.121 subaddress for use by downstream PU connections:

interface serial 0

encapsulation x25

x25 address 3201

x25 map qllc 320208

dspu enable-pu qllc 08

Related Commands

dspu enable-host (QLLC)
x25 map qllc

dspu enable-pu (SDLC)

Use the dspu enable-pu interface configuration command to enable an SDLC address for use by downstream PU connections. Use the no form of this command to disable the connection.

dspu enable-pu sdlc sdlc-addr
no dspu enable-pu sdlc sdlc-addr

Syntax Description

sdlc	Required keyword for SDLC data link control.
sdlc-addr	SDLC address.

Default

No default address is specified.

Command Mode

Interface configuration

Example

The following command enables a DSPU downstream connection:

interface serial 0

encapsulation x25

sdlc role primary

sdlc address c1

dspu enable-pu sdlc c1

Related Commands

dspu host (SDLC)
dspu pu (SDLC)
sdlc address
sdlc role

dspu host (Frame Relay)

Use the dspu host global configuration command to define a DSPU host over a Frame Relay connection. Use the no form of this command to cancel the definition.

dspu host host-name xid-snd xid dlci dlci-number [rsap remote-sap] [lsap local-sap]
[interface slot/port] [window window-size] [maxiframe max-iframe] [retries retry-count]
[retry-timeout retry-timeout] [focalpoint]
no dspu host host-name xid-snd xid dlci dlci-number [rsap remote-sap] [lsap local-sap]
[interface slot/port] [window window-size] [maxiframe max-iframe] [retries retry-count]
[retry-timeout retry-timeout] [focalpoint]

Syntax Description

host-name	The specified DSPU host.
xid-snd xid	XID that will be sent to the host during connection establishment. The XID value is 8 hexadecimal digits that include both Block and ID numbers. For example, if the XID value is 05D00001, the Block number is 05D and the ID number is 00001.
dlci dlci-number	Frame Relay data-link connection identifier (DLCI) number; a decimal number.
rsap rsap-addr	Remote Service Access Provider address.
lsap lsap-addr	Local Service Access Provider address
interface slot/port	(Optional) Slot and port number of the interface.
window window-size	(Optional) Send and receive window sizes used for the host link. The range is 1 to 127.
maxiframe max-iframe	(Optional) Send and receive maximum I-frame sizes used for the host link. The range is 64 to 18432. The default is 1472.
retries retry-count	(Optional) Number of times the DSPU attempts to retry establishing connection with remote host PU. The range is 0 to 255 (0 = no retry attempts, 255 = infinite retry attempts). The default is 255.
retry-timeout retry-timeout	(Optional) Delay (in seconds) between DSPU attempts to retry establishing connection with remote host PU. The range is 1 to 600 seconds. The default is 30.
focalpoint	(Optional) Specifies that the host link will be used for the focal point support.

Defaults

The default remote-sap is 4.
The default local-sap is 12.
The default window-size is 7.
The default max-iframe is 1472.
The default retry-count is 255.
The default retry-timeout is 30.

Command Mode

Global configuration

Example

The following command defines a DSPU host for Frame Relay support:

dspu host rosebud xid-snd 06500001 dlci 200 rsap 4 lsap 12

Related Commands

dspu enable-host (Token Ring, Ethernet, Frame Relay, FDDI)
dspu pool

dspu host (QLLC)

Use the dspu host global configuration command to define a DSPU host over an X.25/QLLC connection. Use the no form of this command to delete the DSPU host definition.

dspu host host-name xid-snd xid x25 remote-x121-addr [qllc local-x121-sub-addr]
[interface slot/port] [window window-size] [maxiframe max-iframe] [retries retry-count]
[retry-timeout retry-timeout] [focalpoint]
no dspu host host-name xid-snd xid x25 remote-x121-addr [qllc local-x121-sub-addr]
[interface slot/port] [window window-size] [maxiframe max-iframe] [retries retry-count]
[retry-timeout retry-timeout] [focalpoint]

Syntax Description

host-name	The specified DSPU host.
xid-snd xid	XID that will be sent to the host during connection establishment. The xid value is 8 hexadecimal digits that include both block and ID numbers. For example, if the xid value is 05D00001, the Block number is 05D and the ID number is 00001.
x25 remote-x121-addr	Remote X.121 address.
qllc local-x121-sub-addr	(Optional) Local X.121 subaddress.
interface slot/port	(Optional) Slot and port number of the interface.
window window-size	(Optional) Send and receive window sizes used for the host link. The range is 1 to 127.
maxiframe max-iframe	(Optional) Send and receive maximum I-frame sizes used for the host link. The range is 64 to 18432. The default is 1472.
retries retry-count	(Optional) Number of times the DSPU attempts to retry establishing connection with remote host PU. The range is 0 to 255 (0 = no retry attempts, 255 = infinite retry attempts). The default is 255.
retry-timeout retry-timeout	(Optional) Delay (in seconds) between DSPU attempts to retry establishing connection with remote host PU. The range is 1 to 600 seconds. The default is 30.
focalpoint	(Optional) Specifies that the host link will be used for the focal point support.

Defaults

The default window-size is 7.
The default max-iframe is 1472.
The default retry-count is 255.
The default retry-timeout is 30.

Command Mode

Global configuration

Example

The following command defines a DSPU host:

dspu host hosta xid-snd 065ffff0 x25 00000123005 qllc 12

Related Commands

dspu enable-host (QLLC)
dspu pool
dspu start

dspu host (SDLC)

Use the dspu host global configuration command to define a DSPU host over an SDLC connection. Use the no form of this command to cancel the definition.

dspu host host-name xid-snd xid sdlc sdlc-addr [interface slot/port] [window window-size]
[maxiframe max-iframe] [retries retry-count] [retry-timeout retry-timeout] [focalpoint]
no dspu host host-name xid-snd xid sdlc sdlc-addr [interface slot/port] [window window-size]
[maxiframe max-iframe] [retries retry-count] [retry-timeout retry-timeout] [focalpoint]

Syntax Description

host-name	The specified DSPU host.
xid-snd xid	XID that will be sent to the host during connection establishment. The XID value is 8 hexadecimal digits that include both Block and ID numbers. For example, if the XID value is 05D00001, the Block number is 05D and the ID number is 00001.
sdlc sdlc-addr	SDLC hexadecimal address.
interface slot/port	(Optional) Slot and port number of the interface.
window window-size	(Optional) Send and receive window sizes used for the host link. The range is 1 to 127. The default window size is 7.
maxiframe max-iframe	(Optional) Send and receive maximum I-frame sizes used for the host link. The range is 64 to 18432. The default is 1472.
retries retry-count	(Optional) Number of times the DSPU attempts to retry establishing connection with remote host PU. The range is 0 to 255 (0 = no retry attempts, 255 = infinite retry attempts). The default is 255.
retry-timeout retry-timeout	(Optional) Delay (in seconds) between DSPU attempts to retry establishing connection with remote host PU. The range is 1 to 600 seconds. The default is 30.
focalpoint	(Optional) Specifies that the host link will be used for the focal point support.

Defaults

The default window size is 7.
The default maximum I-frame is 1472.
The default retry-count is 255.
The default retry timeout is 30.

Command Mode

Global configuration

Example

The following command defines a DSPU host for SDLC:

dspu host hosta xid-snd 065ffff0 sdlc c1

Related Commands

dspu enable-host (SDLC)
dspu pool

dspu host (Token Ring, Ethernet, FDDI, RSRB)

Use the dspu host global configuration command to define a DSPU host over TokenRing, Ethernet, or RSRB connections. Use the no form of this command to cancel the definition.

dspu host host-name xid-snd xid rmac remote-mac [rsap remote-sap] [lsap local-sap]
[interface slot/port] [window window-size] [maxiframe max-iframe] [retries retry-count]
[retry-timeout retry-timeout] [focalpoint]
no dspu host host-name xid-snd xid rmac remote-mac [rsap remote-sap] [lsap local-sap]
[interface slot/port] [window window-size] [maxiframe max-iframe] [retries retry-count]
[retry-timeout retry-timeout] [focalpoint]

Syntax Description

host-name	The specified DSPU host.
xid-snd xid	XID that will be sent to the host during connection establishment. The XID value is 8 hexadecimal digits that include both Block and ID numbers. For example, if the XID value is 05D00001, the Block number is 05D and the ID number is 00001.
rmac rmac	MAC address of the remote host PU.
rsap remote-sap	(Optional) SAP address of the remote host PU. The default is 4.
lsap local-sap	(Optional) Local SAP address used by the DSPU to establish connection with the remote host.
interface slot/port	(Optional) Slot and port number of the interface.
window window-size	(Optional) Send and receive window sizes used for the host link. The range is 1 to 127.
maxiframe max-iframe	(Optional) Send and receive maximum I-frame sizes used for the host link. The range is 64 to 18432. The default is 1472.
retries retry-count	(Optional) Number of times the DSPU attempts to retry establishing connection with remote host PU. The range is 0 to 255 (0 = no retry attempts, 255 = infinite retry attempts). The default is 255.
retry-timeout retry-timeout	(Optional) Delay (in seconds) between DSPU attempts to retry establishing connection with remote host PU. The range is 1 to 600 seconds. The default is 30.
focalpoint	(Optional) Specifies that the host link will be used for the focal point support.

Defaults

The default remote SAP address is 4.
The default local SAP address is 12.
The default window size is 7.
The default maximum I-frame is 1472.
The default retry-count is 255.
The default retry timeout is 30.

Command Mode

Global configuration

Usage Guidelines

The local SAP address must be enabled by one of the following commands: dspu enable-host (Token Ring, Ethernet, Frame Relay, FDDI) lsap, dspu rsrb enable-host, or dspu rsrb enable-host lsap.

If an XID is received from a remote PU that indicates that it supports a different maximum I-frame size, then the smaller of the two values is used.

Alerts from downstream PUs will be forwarded to the focalpoint host. The focalpoint parameter must be included on only one dspu host command.

Example

The following example shows the definition for a DSPU host with 254 LUs and a connection to be established across an RSRB link:

dspu rsrb 88 1 99 4000.ffff.0001

dspu rsrb enable-host lsap 10

dspu host ibm3745 xid 06500001 rmac 4000.3745.0001 lsap 10

dspu pool hostpool lu 2 253 host ibm3745

Related Commands

dspu enable-host (Token Ring, Ethernet, Frame Relay, FDDI)
dspu pool
dspu rsrb enable-host
dspu rsrb start
dspu start

dspu lu

Use the dspu lu global configuration command to define a dedicated LU or a range of LUs for an upstream host and a downstream PU. Use the no form of this command to cancel the definition.

dspu lu lu-start [lu-end] {host host-name host-lu-start | pool pool-name} [pu pu-name]
no dspu lu lu-start [lu-end] {host host-name host-lu-start | pool pool-name} [pu pu-name]

Syntax Description

lu-start	Starting LU address in the range of LUs to be assigned from a pool or dedicated to a host.
lu-end	(Optional) Ending LU address in the range of LUs to be assigned from a pool or dedicated to a host.
host host-name host-lu-start	(Optional) Specifies that each LU in the range of LUs will be dedicated to a host LU host-name. The range of host LUs starts with the address host_lu_start.
pool pool-name	(Optional) Specifies that each LU in the range of LUs will be assigned from the specified pool.
pu pu-name	(Optional) The downstream PU for which this range of LUs is being defined.

Default

There are no default specifications.

Command Mode

Global configuration

Usage Guidelines

If the dspu lu command immediately follows one of these commands:

dspu default-pu
dspu pu (Frame Relay)
dspu pu (QLLC)
dspu pu (SDLC)
dspu pu (Token Ring, Ethernet, FDDI, RSRB)

the dspu lu command is applied to that PU, and the pu keyword and pu-name are not required. If the keyword and argument are included, the LU defined by the dspu lu command will be applied to the named PU.

The pool and host parameters are mutually exclusive. You can define a range of LUs to be either assigned from a pool or dedicated to a host.

Example

The following example defines downstream LUs as dedicated LUs. The downstream PU, ciscopu, has 3 downstream LUs with addresses 2, 3, and 4. When ciscopu establishes a connection with the DSPU, the three downstream LUs (2, 3, and 4) are dedicated to LUs 22, 23, and 24, respectively, from the IBM 3745 host.

dspu host ibm3745 xid-snd 065000001 rmac 4000.3745.0001 

dspu pu ciscopu xid-rcv 05D00001 rmac 1000.5AED.1F53 

dspu lu 2 4 host ibm3745 22

Related Commands

dspu default-pu
dspu host (Frame Relay)
dspu host (QLLC)
dspu host (SDLC)
dspu host (Token Ring, Ethernet, FDDI, RSRB)
dspu pool
dspu pu (Frame Relay)
dspu pu (QLLC)
dspu pu (SDLC)
dspu pu (Token Ring, Ethernet, FDDI, RSRB)

dspu pool

Use the dspu pool global configuration command to define a range of host LUs in an LU pool. Use the no form of this command to remove the definition.

dspu pool pool-name host host-name lu lu-start [lu-end] [inactivity-timeout
inactivity-minutes]
no dspu pool pool-name host host-name lu lu-start [lu-end] [inactivity-timeout
inactivity-minutes]

Syntax Description

pool-name	Name identifier of the pool.
host host-name	Name of the host that owns the range of host LUs in the pool.
lu lu-start	Starting LU address in the range of host LUs in the pool.
lu-end	(Optional) The ending address (inclusive) of the range of host LUs in the pool. If no ending address is specified, only one LU (identified by lu-start) will be defined in the pool.
inactivity-timeout inactivity-minutes	(Optional) Interval of inactivity (in minutes) on either the SSCP-LU or LU-LU sessions, which will cause the downstream LU to be disconnected from the upstream LU.

Default

The inactivity-timeout is disabled.

Command Mode

Global configuration

Usage Guidelines

You can include multiple dspu pool commands that specify the same pool name. In this way, an LU pool can include several LU ranges from the one host PU, or it can include LUs from different host PUs. The LUs from host host-name starting at lu-start and ending with lu-end, inclusive, will be included in the pool pool-name. For the LUs in this pool, if there is no traffic on either the SSCP-LU or LU-LU sessions for the inactivity-timeout number of minutes, the downstream LU will be disconnected from the upstream LU, and the upstream LU will be allocated to any downstream LU waiting for a session. A value of zero for inactivity minutes means no timeouts. (Note that the inactivity-timeout applies to all LUs in this pool, not just the LUs defined by this dspu pool command. The last value configured will be used.)

Examples

The following example defines a pool of host a pool LUs. A pool of 253 host LUs is defined with all LUs supplied from the ibm3745 host PU:

dspu host ibm3745 xid-snd 065000001 rmac 4000.3745.0001 

dspu pool hostpool host ibm3745 lu 2 254

The following example defines multiple pools and defines a disjoint pool of host LUs. One pool with a total of 205 host LUs and second pool with a total of 48 host LUs are defined with all LUs supplied from the same ibm3745 host PU. Host LUs with addresses 2 to 201 and 250 to 254 are defined in hostpool1. Host LUs with addresses 202 to 249 are defined in hostpool2.

dspu host ibm3745 xid-snd 065000001 rmac 4000.3745.0001 

dspu pool hostpool1 host ibm3745 lu 2 201

dspu pool hostpool2 host ibm3745 lu 202 249

dspu pool hostpool1 host ibm3745 lu 250 254

The following example defines a pool of LUs from multiple hosts. A pool of 506 host LUs is defined with 253 LUs supplied by the ibm3475 host PU and 253 supplied by the ibm3172 hostPU.

dspu host ibm3745 xid-snd 065000001 rmac 4000.3745.0001

dspu host ibm3172 xid 06500002 rmac 4000.3172.0001

dspu pool hostpool host ibm3745 lu 2 254

dspu pool hostpool host ibm3172 lu 2 254

Related Commands

dspu host (Frame Relay)
dspu host (QLLC)
dspu host (Token Ring, Ethernet, FDDI, RSRB)
dspu lu

dspu pu (Frame Relay)

Use the dspu pu global configuration command to define a DSPU host over a Frame Relay connection. Use the no form of this command to cancel the definition.

dspu pu pu-name dlci dlci-number [rsap remote-sap] [lsap local-sap] [xid-rcv xid]
[interface slot/port] [window window-size] [maxiframe max-iframe] [retries retry-count]
[retry-timeout retry-timeout]
no dspu pu pu-name dlci dlci-number [rsap remote-sap] [lsap local-sap] [xid-rcv xid]
[interface slot/port] [window window-size] [maxiframe max-iframe] [retries retry-count]
[retry-timeout retry-timeout]

Syntax Description

pu-name	Name of the downstream PU.
dlci dlci-number	Frame Relay data-link connection identifier (DLCI) number; a decimal number.
rsap remote-sap	(Optional) SAP address of the downstream PU. The default is 4.
lsap local-sap	(Optional) Local SAP address used by the DSPU to establish connection with the downstream PU. The default is 8.
xid-rcv xid	(Optional) Specifies a match on XID.
interface slot/port	(Optional) Slot and port number of the interface.
window window-size	(Optional) Send and receive sizes used for the downstream PU link. The range is 1 to 127. The default is 7.
maxiframe max-iframe	(Optional) Maximum I-frame that can be transmitted or received across the link. The range is 64 to 18,432. The default is 1472.
retries retry-count	Number of times the DSPU attempts to retry establishing connection with downstream PU. The range is 0 to 255 (0 = no retry attempts, 255 = infinite retry attempts). The default is 4.
retry-timeout retry-timeout	(Optional) Delay (in seconds) between DSPU attempts to retry establishing connection with downstream PU. The range is 1 to 600 seconds. The default is 30.

Defaults

The default remote-sap is 4.
The default local-sap is 8.
The default window-size is 7.
The default max-iframe is 1472.
The default retry-count is 4.
The default retry-timeout is 30.

Command Mode

Global configuration

Example

The following example defines a downstream PU:

dspu pu pub dlci 8

Related Commands

dspu enable-pu (Token Ring, Ethernet, Frame Relay, FDDI)
dspu lu

dspu pu (QLLC)

Use the dspu pu global configuration command to explicitly define a downstream PU over an X.25 connection. Use the no form of this command to cancel the definition.

dspu pu pu-name x25 remote-x121-addr [qllc local-x121-sub-addr] [xid-rcv xid]
[interface slot/port] [window window-size] [maxiframe max-iframe] [retries retry-count]
[retry-timeout retry-timeout]
no dspu pu pu-name x25 remote-x121-addr [qllc local-x121-sub-addr] [xid-rcv xid]
[interface slot/port] [window window-size] [maxiframe max-iframe] [retries retry-count]
[retry-timeout retry-timeout]

Syntax Description

pu-name	Name of the downstream PU.
x25 remote-x121-addr	Variable-length X.121 address. It is assigned by the X.25 network service provider.
qllc local-x121-subaddr	(Optional) Local X.121 subaddress.
xid-rcv xid	(Optional) Specifies a match on XID.
interface slot/port	(Optional) Slot and port number of the interface.
window window-size	(Optional) Send and receive sizes used for the downstream PU link. The range is 1 to 127. The default is 7.
maxiframe max-iframe	(Optional) Maximum I-frame that can be transmitted or received across the link. The range is 64 to 18,432. The default is 1472.
retries retry-count	Number of times the DSPU attempts to retry establishing connection with downstream PU. The range is 0 to 255 (0 = no retry attempts, 255 = infinite retry attempts). The default is 4.
retry-timeout retry-timeout	(Optional) Delay (in seconds) between DSPU attempts to retry establishing connection with downstream PU. The range is 1 to 600 seconds. The default is 30.

Defaults

The default window-size is 7.
The default max-iframe is 1472.
The default retry-count is 4.
The default retry-timeout is 30.

Command Mode

Global configuration

Example

The following command defines a downstream PU:

dspu pu testpu xid-rcv 05d00001 x25 32012 qllc 12

Related Commands

dspu enable-pu (QLLC)
dspu lu

dspu pu (SDLC)

Use the dspu pu global configuration command to define a DSPU host over an SDLC connection. Use the no form of this command to cancel the definition.

dspu pu pu-name xid-rcv xid sdlc sdlc-addr [interface slot/port] [window window-size]
[maxiframe max-iframe] [retries retry-count] [retry-timeout retry-timeout]
no dspu pu pu-name xid-rcv xid sdlc sdlc-addr [interface slot/port] [window window-size]
[maxiframe max-iframe] [retries retry-count] [retry-timeout retry-timeout]

Syntax Description

pu-name	Name of the downstream PU.
xid-rcv xid	Specifies a match on XID.
sdlc sdlc-addr	SDLC address.
interface slot/port	(Optional) Slot and port number of the interface.
window window-size	(Optional) Send and receive sizes used for the downstream PU link. The range is 1 to 127. The default is 7.
maxiframe max-iframe	(Optional) Maximum I-frame that can be transmitted or received across the link. The range is 64 to 18,432. The default is 1472.
retries retry-count	(Optional) Number of times the DSPU attempts to retry establishing connection with downstream PU. The range is 0 to 255 (0 = no retry attempts, 255 = infinite retry attempts). The default is 4.
retry-timeout retry-timeout	(Optional) Delay (in seconds) between DSPU attempts to retry establishing connection with downstream PU. The range is 1 to 600 seconds. The default is 30.

Defaults

The default window-size is 7.
The default max-iframe is 1472.
The default retry-count is 4.
The default retry-timeout is 30.

Command Mode

Global configuration

Example

The following command defines a downstream PU:

dspu pu testpu sdlc c1 interface serial 0

Related Commands

dspu enable-pu (SDLC)
dspu lu

dspu pu (Token Ring, Ethernet, FDDI, RSRB)

Use the dspu pu global configuration command to define an explicit downstream PU over Token Ring, Ethernet, or RSRB connections. Use the no form of this command to cancel the definition.

dspu pu pu-name [rmac remote-mac] [rsap remote-sap] [lsap local-sap] [xid-rcv xid]
[interface slot/port] [window window-size] [maxiframe max-iframe] [retries retry-count]
[retry-timeout retry-timeout]
no dspu pu pu-name [rmac remote-mac] [rsap remote-sap] [lsap local-sap] [xid-rcv xid]
[interface slot/port] [window window-size] [maxiframe max-iframe] [retries retry-count]
[retry-timeout retry-timeout]

Syntax Description

pu-name	Name of the downstream PU.
rmac remote-mac	(Optional) MAC address of the downstream PU.
rsap remote-sap	(Optional) SAP address of the downstream PU. The default is 4.
lsap local-sap	(Optional) Local SAP address used by the DSPU to establish connection with the downstream PU. The default is 8.
xid-rcv xid	(Optional) Specifies a match on XID.
interface slot/port	(Optional) Slot and port number of the interface.
window window-size	(Optional) Send and receive sizes used for the downstream PU link. The range is 1 to 127. The default is 7.
maxiframe max-iframe	(Optional) Maximum I-frame that can be transmitted or received across the link. The range is 64 to 18,432. The default is 1472.
retries retry-count	Number of times the DSPU attempts to retry establishing connection with downstream PU. The range is 0 to 255 (0 = no retry attempts, 255 = infinite retry attempts). The default is 4.
retry-timeout retry-timeout	(Optional) Delay (in seconds) between DSPU attempts to retry establishing connection with downstream PU. The range is 1 to 600 seconds. The default is 30.

Defaults

The default remote-sap is 4.
The default local-sap is 8.
The default window-size is 7.
The default max-iframe is 1472.
The default retry-count is 4.
The default retry-timeout is 30.

Command Mode

Global configuration

Usage Guidelines

The local SAP address must be enabled by one of the following commands:

dspu enable-pu (Token Ring, Ethernet, Frame Relay, FDDI)
dspu rsrb enable-pu lsap

The send and receive maximum I-frame size includes the SNA TH and RH, but does not include the data link control header. The DSPU feature will segment frames being transmitted to fit within this frame size. If an XID is received from a remote PU which indicates that it supports a different maximum I-frame size, then the smaller of the two values is used

If you want the DSPU to attempt a ConnectOut to the remote node using the dspu start command, you must configure the rmac keyword and argument. If you want this PU to match against a ConnectIn attempt, then several combinations of rmac, rsap, xid-rcv are possible. The matching algorithms are as follows:

•rmac—Match on remote MAC/SAP address of downstream PU

•xid-rcv—Match on XID value received from downstream PU.

•rmac/rsap, xid-rcv—Match on remote MAC/SAP address of downstream PU and XID value received from downstream PU.

If an XID is received from a remote PU which indicates that it supports a different maximum I-frame size, then the smaller of the two values is used.

Examples

In the following example, a downstream PU is defined with only the MAC address and SAP address specified. A downstream PU that attempts an incoming connection to the DSPU will only be accepted if the remote MAC/SAP address matches the configured values for this downstream PU (and the proper local SAP address is enabled).

dspu pu ciscopu rmac 1000.5AED.1F53 rsap 20

dspu lu 2 5 pool hostpool

interface tokenring 0

dspu enable-pu lsap 8

In the following example, a downstream PU is defined with only an xid-rcv value. Any downstream PU that attempts an incoming connection specifying the xid-rcv value, 05D00001, will be accepted without regard to remote MAC or SAP address (although the proper local SAP address must be enabled).

dspu pu ciscopu xid-rcv 05d00001

dspu lu 2 5 pool hostpool

interface tokenring 0

dspu enable-pu lsap 8

In the following example, a downstream PU is defined with xid-rcv, rmac, and rsap parameters. Any downstream PU that attempts to connectIn to the DSPU must match all three configured values for the connection to be accepted (the proper local SAP address must also be enabled).

dspu pu ciscopu xid-rcv 05d00001 rmac 1000.5AED.1F53 rsap 20

dspu lu 2 5 pool hostpool

interface tokenring 0

dspu enable-pu lsap 8

Related Commands

dspu enable-pu (Token Ring, Ethernet, Frame Relay, FDDI)
dspu lu
dspu rsrb enable-pu
dspu rsrb start
dspu start

dspu rsrb

Use the dspu rsrb global configuration command to define the local virtual ring, the virtual bridge, the target virtual ring, and the virtual MAC address that the DSPU feature will simulate at the RSRB. Use the no form of this command to cancel the definition.

dspu rsrb local-virtual-ring bridge-number target-virtual-ring virtual-macaddr
no dspu rsrb local-virtual-ring bridge-number target-virtual-ring virtual-macaddr

Syntax Description

local-virtual-ring	DSPU local virtual ring number.
bridge-number	Bridge number connecting the DSPU local virtual ring and the RSRB target virtual ring. The valid range is 1 to 15.
target-virtual-ring	RSRB target virtual ring number. The RSRB target virtual ring corresponds to the ring-number parameter defined by a source-bridge ring-group command.
virtual-macaddr	DSPU virtual MAC address.

Default

There are no default settings.

Command Mode

Global configuration

Usage Guidelines

The bridge number parameter can be specified only once in a configuration.

Use the dspu rsrb command to enable DSPU host and downstream connections to be established across an RSRB link.

If the local-ack parameter is specified on the source-bridge remote-peer statement, DSPU will establish host connections across RSRB using local acknowledgment. DSPU cannot support local acknowledgment for downstream PU connections across RSRB.

Examples

The following example defines DSPU to start connection to host across RSRB link (without local acknowledgment). The DSPU is identified by its local ring number 88 and its virtual MAC address 4000.FFFF.0001. When the DSPU attempts an outgoing connection to the ibm3745 host, the connection will be established across the RSRB virtual ring 99.

source-bridge ring-group 99

source-bridge remote-peer 99 tcp 150.10.13.1

source-bridge remote-peer 99 tcp 150.10.13.2

dspu rsrb 88 1 99 4000.FFFF.0001

dspu rsrb enable-host lsap 10

dspu host ibm3745 xid-snd 06500001 rmac 4000.3745.0001 lsap 10

dspu rsrb start ibm3745

interface serial 0

ip address 150.10.13.1 255.255.255.0

The following example defines DSPU to start connection to host across RSRB link (with local acknowledgment). The DSPU is identified by its local ring number 88 and its virtual MAC address 4000.FFFF.0001. When the DSPU attempts an outward connection to the ibm3745 host, the connection will be established across the RSRB virtual ring 99 using RSRB local acknowledgment.

source-bridge ring-group 99

source-bridge remote-peer 99 tcp 150.10.13.1

source-bridge remote-peer 99 tcp 150.10.13.2 local-ack

dspu rsrb 88 1 99 4000.FFFF.0001

dspu rsrb enable-host lsap 10

dspu host ibm3745 xid-snd 06500001 rmac 4000.3745.0001 lsap 10

dspu rsrb start ibm3745

interface serial 0

ip address 150.10.13.1 255.255.255.0

The following example defines DSPU to allow connection from downstream PU across RSRB link.The DSPU is identified by its local ring number 88 and its virtual MAC address 4000.FFFF.0001. The downstream PU will specify the DSPU virtual MAC address 4000.FFFF.0001 and SAP address 20 in its host definitions. The DSPU will accept incoming connections from the downstream PU across the RSRB virtual ring 99.

source-bridge ring-group 99

source-bridge remote-peer 99 tcp 150.10.13.1

source-bridge remote-peer 99 tcp 150.10.13.2 

dspu rsrb 88 1 99 4000.FFFF.0001

dspu rsrb enable-pu lsap 20

dspu pu ciscopu xid-rcv 05D00001 lsap 20

interface serial 0

ip address 150.10.13.1 255.255.255.0

Related Commands

A dagger (†) indicates that the command is documented in another chapter.

dspu rsrb enable-host
dspu rsrb enable-pu
dspu rsrb start
source-bridge ring-group^†
source-bridge remote-peer ^†

dspu rsrb enable-host

Use the dspu rsrb enable-host global configuration command to enable an RSRB SAP for use by DSPU host connections. Use the no form of this command to disable the RSRB SAP.

dspu rsrb enable-host [lsap local-sap]
no dspu rsrb enable-host [lsap local-sap]

Syntax Description

lsap local-sap

(Optional) Specifies that the local SAP address will be activated as an upstream SAP for both receiving incoming connections attempts and for starting outgoing connection attempts. The default is 12.