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This chapter explains the function and syntax of the serial tunnel and block serial tunnel commands. For more information about defaults and usage guidelines, see the corresponding chapter of the Cisco IOS Bridging and IBM Networking Command Reference, Volume 1, Release 12.1.
To configure an asynchronous port to transmit and receive polled asynchronous traffic through a BSTUN tunnel, use the asp addr-offset interface configuration command. Use the no form of this command to cancel the specification.
asp addr-offset address-offset
Syntax Description
address-offset Location of the address byte within the polled asynchronous frame being received.
To specify whether the router is acting as the primary end of the polled asynchronous link or as the secondary end of the polled asynchronous link connected to the serial interface and the attached remote device is a security alarm control station, use the asp role interface configuration command. Use the no form of this command to cancel the specification.
asp role {primary | secondary}
Syntax Description
primary Router is the primary end of the polled asynchronous link connected to the serial interface, and the attached remote devices are alarm panels. secondary Router is the secondary end of the polled asynchronous link connected to the serial interface, and the attached remote device is a security alarm control station.
To specify a time period that, by expiring, signals the end of one frame being received and the start of the next, use the asp rx-ift interface configuration command. Use the no form of this command to cancel the specification.
asp rx-ift interframe-timeout
Syntax Description
interframe-timeout Number of milliseconds between the end of one frame being received and the start of the next frame. The default timeout value is 40 ms.
To specify the character set used by the Bisync support feature in this serial interface as either EBCDIC or ASCII, use the bsc char-set interface configuration command. Use the no form of this command to cancel the character set specification.
bsc char-set {ascii | ebcdic}
Syntax Description
ascii ASCII character set. ebcdic EBCDIC character set. This character set is the default.
To specify an address on a contention interface, use the bsc contention interface configuration command. Use the no form of this command to cancel the specification.
bsc contention address
Syntax Description
address Address assigned to contention interface. The range is 1 to 255. The default is 0x01.
To specify a router at the central site as a central router with dynamic allocation of serial interfaces, use the bsc dial-contention interface configuration command. Use the no form of this command to cancel the specification.
bsc dial-contention time-out
Syntax Description
time-out Amount of time interface can sit idle before it is returned to the idle interface pool. The range is 2 to 30 seconds. The default is 5 seconds.
To detect deactivation of devices at the host, use the bsc host-timeout interface configuration command. Use the no form of this command to cancel the configuration.
bsc host-timeout interval
Syntax Description
interval Timeout interval within which a poll or select for a control unit must be received. If this interval expires, the remote router is sent a teardown peer signal. The range is 30 to 3000 deciseconds. The default is 600 deciseconds (60 seconds).
Syntax Description
time Interval in tenths of a second. The default value is 10 (that is, 10 tenths, or 1 second). The maximum time is 255 (25.5 seconds).
Syntax Description
time Time in tenths of a second. The default value is 10 (that is, 10 tenths, or 1 second).
Syntax Description
This command has no arguments or keywords.
Syntax Description
retries Number of retries before a device fails. The default is 5.
Syntax Description
This command has no arguments or keywords.
To specify the number of cycles of the active poll list that are performed between polls to control units in the inactive poll list, use the bsc servlim interface configuration command. Use the no form of this command to cancel the specification.
bsc servlim servlim-count
Syntax Description
servlim-count Number of cycles. The range is 1 to 50. The default is 3.
Syntax Description
This command has no arguments or keywords.
To specify the BSTUN group to which the interface belongs, use the bstun group interface configuration command. Use the no form of this command to remove the interface from the BSTUN group.
bstun group group-number
Syntax Description
group-number BSTUN group to which the interface belongs.
To define the number of times to attempt a peer connection before declaring the peer connection to be down, use the bstun keepalive-count global configuration command. Use the no form of this command to cancel the definition.
bstun keepalive-count count
Syntax Description
count Number of connection attempts. The range is between 2 and 10 retries.
To configure a SAP on which to listen for incoming calls, use the bstun lisnsap global configuration command. Use the no form of this command to cancel the SAP on which to listen.
bstun lisnsap sap-value
Syntax Description
sap-value SAP on which to listen for incoming calls. The default is 04.
To enable the BSTUN function, use the bstun peer-name global configuration command. Use the no form of this command to disable the function.
bstun peer-name ip-address
Syntax Description
ip-address Address by which this BSTUN peer is known to other BSTUN peers that are using the TCP transport.
To define a BSTUN group and the protocol it uses, use the bstun protocol-group global configuration command. Use the no form of this command to delete the BSTUN group.
bstun protocol-group group-number protocol
Syntax Description
group-number BSTUN group number. Valid numbers are decimal integers in the range 1 to 255. protocol Block serial protocol, selected from the following:
To enable detection of the loss of a peer, use the bstun remote-peer-keepalive global configuration command. Use the no form of this command to disable detection.
bstun remote-peer-keepalive seconds
Syntax Description
seconds Keepalive interval, in seconds. The range is 1 to 300 seconds. The default is 30 seconds.
To define how frames will be forwarded from a BSTUN interface to a remote BSTUN peer, use the bstun route interface configuration command. Use the no form of this command to cancel the definition.
bstun route {all | address address-number} {tcp ip-address | interface serial number} [direct]
Syntax Description
all All BSTUN traffic received on the input interface is propagated, regardless of the address contained in the serial frame. address Serial frame that contains a specific address is propagated. address-number Poll address, a hexadecimal number from 01 to FF (but not all values are valid). The reply address to be used on the return leg is calculated from the configured poll address. tcp TCP encapsulation is used to propagate frames that match the entry. ip-address IP address of the remote BSTUN peer. interface serial HDLC encapsulation is used to propagate the serial frames. number Serial line to an appropriately configured router on the other end. direct (Optional) Specified interface is also a direct BSTUN link, rather than a serial connection to another peer.
To define how frames will be forwarded from a BSTUN interface to a remote BSTUN peer over Frame Relay, use the bstun route (Frame Relay) interface configuration command. Use the no form of this command to cancel the definition.
bstun route {all | address cu-address} interface serial number [dlci dlci rsap] [priority priority]
Syntax Description
all All BSTUN traffic received on the input interface is propagated, regardless of the address contained in the serial frame. address Serial frames that contain a specific address are propagated. cu-address Control unit address for the Bisync end station. interface serial number Specify a serial interface on which Frame Relay encapsulation is used to propagate serial frames. dlci dlci (Optional) Data-link connection identifier to be used on the Frame Relay interface. rsap (Optional) Remote SAP, to be used when initiating an LLC2 session. This argument is configurable only if the interface group number supports local acknowledgment. priority priority (Optional) Priority port to be used for this LLC2 session. Configurable only if the interface group number supports local acknowledgment.
Syntax Description
This command has no arguments or keywords.
To enable STUN encapsulation on a specified serial interface, use the encapsulation stun interface configuration command.
encapsulation stunSyntax Description
This command has no arguments or keywords.
To configure BSTUN over Frame Relay for passthru, use the frame-relay map bstun interface configuration command. Use the no form of this command to cancel the configuration.
frame-relay map bstun dlci
Syntax Description
dlci Frame Relay DLCI number on which to support passthrough.
To establish BSTUN queuing priorities based on the BSTUN header, use the priority-list protocol bstun global configuration command. Use the no form of this command to revert to normal priorities.
priority-list list-number protocol bstun queue [gt | lt packetsize] [address bstun-group bsc-addr]
Syntax Description
list-number Arbitrary integer between 1 and 10 that identifies the priority list selected by the user. queue Priority queue type: high, medium, normal, or low. gt | lt packetsize (Optional) Output interface examines header information and packet size and places packets with the BSTUN header that match criteria (gt or lt specified packet size) on specified output. address bstun-group bsc-addr (Optional) Output interface examines header information and Bisync address and places packets with the BSTUN header that match Bisync address on the specified output queue.
To establish BSTUN or STUN queuing priorities based on the TCP port, use the priority-list protocol ip tcp global configuration command. Use the no form of this command to revert to normal priorities.
priority-list list-number protocol ip queue tcp tcp-port-number
Syntax Description
list-number Arbitrary integer between 1 and 10 that identifies the priority list selected by the user. queue Priority queue type: high, medium, normal, or low. The default queue value is normal. tcp-port-number BSTUN port and priority settings are as follows: STUN port and priority settings are as follows:
Syntax Description
list-number Arbitrary integer between 1 and 16 that identifies the priority list selected by the user. queue Enables a priority queue type: Valid queue values and their equivalent priority queue type level are: The default queue value is normal. group-number Group number that is used in the stun group command. address-number Address of the serial link. For an SDLC link, the format is a 1-byte hexadecimal value (for example, C1). For a non-SDLC link, the address format can be specified by the stun schema command.
To customize BSTUN queuing priorities based on the BSTUN header, use the queue-list protocol bstun global configuration command. Use the no form of this command to revert to normal priorities.
queue-list list-number protocol bstun queue [gt | lt packetsize] [address bstun-group bsc-addr]
Syntax Description
list-number Arbitrary integer between 1 and 10 that identifies the priority list selected by the user. queue Enables a priority queue type: Valid queue-keyword values and their equivalent priority queue type level are: gt | lt packetsize (Optional) Output interface examines header information and packet size and places packets with the BSTUN header that match criteria (gt or lt specified packet size) on specified output. address bstun-group bsc-addr (Optional) Output interface examines header information and Bisync address and places packets with the BSTUN header that match Bisync address on the specified output queue.
To customize BSTUN queuing priorities based on the TCP port, use the queue-list protocol ip tcp global configuration command. Use the no form of this command to revert to normal priorities.
queue-list list-number protocol ip queue tcp tcp-port-number
Syntax Description
list-number Arbitrary integer between 1 and 10 that identifies the priority list selected by the user. queue Enables a priority queue type: Valid queue-keyword values and their equivalent priority queue type level are: The default queue value is normal. tcp-port-number BSTUN port and priority settings are as follows: STUN port and priority settings are as follows:
To allow SDLC broadcast address FF to be replicated for each of the STUN peers, so each of the end stations receive the broadcast frame, use the sdlc virtual-multidrop interface configuration command. Use the no form of this command to disable the SDLC broadcast feature.
sdlc virtual-multidropSyntax Description
This command has no arguments or keywords.
To display statistics about the interfaces on which Bisync is configured, use the show bsc privileged EXEC command.
show bsc [group bstun-group-number] [address address-list]
Syntax Description
group bstun-group-number (Optional) BSTUN group number. Valid numbers are decimal integers in the range 1 to 255. address address-list (Optional) List of poll addresses.
To display the current status of STUN connections, use the show bstun privileged EXEC command.
show bstun [group bstun-group-number] [address address-list]
Syntax Description
group bstun-group-number (Optional) BSTUN group number. Valid numbers are decimal integers in the range 1 to 255. address address-list (Optional) List of poll addresses.
To display the current status of STUN connections, use the show stun privileged EXEC command.
show stunSyntax Description
This command has no arguments or keywords.
To place each STUN-enabled interface on a router in a previously defined STUN group, use the stun group interface configuration command. Use the no form of this command to remove an interface from a group.
stun group group-number
Syntax Description
group-number Integer in the range 1 to 255.
To define the number of times to attempt a peer connection before declaring the peer connection to be down, use the stun keepalive-count global configuration command. Use the no form of this command to cancel the definition.
stun keepalive-count count
Syntax Description
count Number of connection attempts. The range is between 2 and 10 retries.
To enable STUN for an IP address, use the stun peer-name global configuration command. Use the no form of this command to disable STUN for an IP address.
stun peer-name ip-address cls
Syntax Description
ip-address IP address by which this STUN peer is known to other STUN peers. cls Use Cisco Link Services (CLS) to access the frame relay network.
Syntax Description
group-number Integer in the range 1 to 255. basic Indicates a non-SDLC protocol. sdlc Indicates an SDLC protocol. sdlc-tg (Optional) Identifies the group as part of an SNA transmission group. schema Indicates a custom protocol.
To enable STUN quick-response, which can be used with local acknowledgment, use the stun quick-response global configuration command. Use the no form of this command to disable STUN quick-response.
stun quick-responseSyntax Description
This command has no arguments or keywords.
To enable detection of the loss of a peer, use the stun remote-peer-keepalive global configuration command. Use the no form of this command to disable detection.
stun remote-peer-keepalive seconds
Syntax Description
seconds Keepalive interval, in seconds. The range is 1 to 300 seconds. The default is 30 seconds.
To configure direct Frame Relay encapsulation between STUN peers with SDLC local acknowledgment, use the stun route address interface dlci interface configuration command. Use the no form of this command to disable the configuration.
stun route address sdlc-addr interface frame-relay-port dlci number localsap local-ack cls
Syntax Description
sdlc-addr Address of the serial interface. frame-relay-port Port number. number Data-link connection identifier (DLCI) number. localsap Local connecting SAP. local-ack Enable local acknowledgment. cls Use Cisco Link Services (CLS) to access the Frame Relay network.
To forward all HDLC traffic on a serial interface, use the stun route address interface serial interface configuration command. Use the no form of this command to disable this method of HDLC encapsulation.
stun route address address-number interface serial number [direct]
Syntax Description
address-number Address of the serial interface. number Number assigned to the serial interface. direct (Optional) Forwards all HDLC traffic on a direct STUN link.
To specify TCP encapsulation and optionally establish SDLC local acknowledgment (SDLC transport) for STUN, use the stun route address tcp interface configuration command. Use the no form of this command to disable this method of TCP encapsulation.
stun route address address-number tcp ip-address [local-ack] [priority] [tcp-queue-max]
Syntax Description
address-number Number that conforms to SDLC addressing conventions. ip-address IP address by which this STUN peer is known to other STUN peers that are using the TCP as the STUN encapsulation. local-ack (Optional) Enables local acknowledgment for STUN. priority (Optional) Establishes the four levels used in priority queuing: low, medium, normal, and high. tcp-queue-max (Optional) Sets the maximum size of the outbound TCP queue for the SDLC link. The default is 100.
To encapsulate and forward all STUN traffic using HDLC encapsulation on a serial interface, use the stun route all interface serial interface configuration command. Use the no form of this command to disable this method of encapsulation.
stun route all interface serial number [direct]
Syntax Description
number Number assigned to the serial interface. direct (Optional) Indicates that the specified interface is also a direct STUN link, rather than a serial connection to another peer.
To forward all STUN traffic on an interface regardless of what address is contained in the serial frame, use the stun route all tcp interface configuration command with TCP encapsulation. Use the no form of this command to disable traffic from being forwarded with this method of encapsulation.
stun route all tcp ip-address
Syntax Description
ip-address IP address by which this remote STUN peer is known to other STUN peers. Use the address that identifies the remote STUN peer that is connected to the remote serial link.
To define a protocol other than SDLC for use with STUN, use the stun schema offset length format global configuration command. Use the no form of this command to disable the new protocol.
stun schema name offset constant-offset length address-length format format-keyword
Syntax Description
name Name that defines your protocol. It can be up to 20 characters in length. constant-offset Constant offset, in bytes, for the address to be found in the frame. address-length Length in one of the following formats: decimal (4 bytes), hexadecimal (8 bytes), or octal (4 bytes). format-keyword Identifies format to be used to specify and display addresses for routes on interfaces that use this STUN protocol. Valid format keyword values and their ranges are:
To assign the router the role of SDLC primary node, use the stun sdlc-role primary interface configuration command. Primary nodes poll secondary nodes in a predetermined order. Use the no form of this command to disable the primary node role assignment.
stun sdlc-role primarySyntax Description
This command has no arguments or keywords.
To assign the router the role of SDLC secondary node, use the stun sdlc-role secondary interface configuration command. Secondary nodes respond to polls sent by the SDLC primary by transmitting any outgoing data they may have. Use the no form of this command to disable the secondary node role assignment
stun sdlc-role secondarySyntax Description
This command has no arguments or keywords.
Posted: Wed Jul 26 11:22:11 PDT 2000
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