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This chapter describes the function and displays the syntax of each STUN, BSTUN, and BSC command. For more information about defaults and usage guidelines, see the corresponding chapter of the Router Products Command Reference publication.
Use the bsc char-set interface configuration command to specify the character set used by the BSC support feature in this serial interface as either EBCDIC or ASCII.
| char-set | The character set. Valid keywords are ebcdic or ascii. |
Use the bsc contention interface configuration command to specify that the BSC link connected to the serial interface is a point-to-point BSC station. Use the no form of this command to cancel the specification.
Use the bsc fdx interface configuration command to specify that the interface can run BSC using switched RTS signals. Use the no form of this command to cancel the specification.
Use the bsc pause interface configuration command to specify the interval to the tenth of a second, between the start of a polling cycle. Use the no form of this command to cancel the specification.
| time | Interval in tenths of a second. The default is 1 second. |
Use the bsc poll-timeout interface configuration command to specify the polling timeout to the tenth of a second. Use the no form of this command to cancel the specification.
| time | Time in tenths of a second. The default is 1 second. |
Use the bsc primary interface configuration command to specify that the router is acting as the primary end of the BSC link connected to the serial interface, and that the attached remote devices are BSC tributary stations. Use the no form of this command to cancel the specification.
Use the bsc retries interface configuration command to specify the number of retries performed before a device is considered to have failed. Use the no form of this command to cancel the specification.
| retries | Number of retries. The default is 5 retries. |
Use the bsc secondary interface configuration command to specify that the router is acting as the secondary end of the BSC link connected to the serial interface, and the attached remote device is a BSC control station.
Use the bsc servlim interface configuration command 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 no form of this command to cancel the specification.
| servlim-count | Number of cycles. The default is 3 cycles. |
Use the bstun group interface configuration command to specify the BSTUN group to which the interface belongs. Use the no form of this command to remove the interface from the BSTUN group.
| group-number | The BSTUN group to which the interface belongs. |
Use the bstun peer-name global configuration command to enable the block serial tunneling function. Use the no form of this command to disable the function.
| ip-address | The address by which this BSTUN peer is known to other BSTUN peers that are using the TCP transport. |
Use the bstun protocol-group global configuration command to define a BSTUN group, and the protocol it uses. Use the no form of this command to delete the BSTUN group.
| group-number | The BSTUN group number. Valid numbers are decimal integers in the range 1 to 255. |
| protocol | Currently the only supported block serial protocol is BSC. |
| bsc | Enable BSC passthrough. |
| bsc-local-ack | Enable local acknowledgment of BSC frames. |
Use the bstun route interface configuration command to define how frames will be forwarded from a BSTUN interface. Use the no form of this command to cancel the definition.
| all | All BSTUN traffic received on the input interface is propagated, regardless of the address contained in the serial frame. |
| address | The serial frame that contains a specific address is propagated. |
| address-number | For BSC protocols, address number is the poll address. |
| tcp | TCP encapsulation is used to propagate frames that match the entry. |
| ip-address | The IP address of the remote BSTUN peer. |
| interface serial | HDLC encapsulation is used to propagate the serial frames. |
| number | The serial line to an appropriately configured router on the other end. |
| direct | The specified interface is also a direct BSTUN link, rather than a serial connection to another peer. |
Use the encapsulation bstun interface configuration command to configure BSTUN on a particular serial interface. Use the no form of this command to disable the BSTUN function on the interface.
Use the encapsulation stun interface configuration command to enable STUN encapsulation on a specified serial interface.
Use the locaddr-priority-list interface configuration command to establish queuing priorities based upon the address of the logical unit (LU). Use the no form of this command to cancel all previous assignments.
| list-number | Arbitrary integer between 1 and 10 that identifies the LU address priority list. |
| address-number | Value of the LOCADDR= parameter on the LU macro, which is a 1-byte address of the LU in hexadecimal. |
| queue-keyword | Priority queue type: high, medium, normal, or low. |
Use the priority-group interface configuration command to assign a priority group to an interface. Use the no form of this command to remove assignments.
| list-number | Priority list number assigned to the interface. |
Use the priority-list protocol bstun global configuration command to establish BSTUN queuing priorities based on the BSTUN header. Use the no form of this command to revert to default priorities.
| 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 | STUN port and priority settings are as follows: high (1994), medium (1990), normal (1991), and low (1992). |
| address bstun-group bsc-addr | (Optional) Output interface examines header information and BSC address and place packets with the BSTUN header that match the BSTUN address of the specific output queue. |
Use the priority-list protocol ip tcp global configuration command to establish BSTUN or STUN queuing priorities based on the TCP port. Use the no form of this command to revert to normal priorities.
| list-number | Arbitrary integer between 1 and 10 that identifies the priority list selected by the user. |
| keyword | Priority queue type: high, medium, normal, or low. |
| tcp-port-number | BSTUN port and priority settings are as follows:High - BSTUN port 1976Medium - BSTUN port 1977Normal - BSTUN port 1978Low - BSTUN port 1979STUN port and priority settings are as follows: High - STUN port 1994Medium - STUN port 1990Normal - STUN port 1991Low - STUN port 1992. |
Use the priority-list stun address global configuration command to establish STUN queuing priorities based on the address of the serial link. Use the no form of this command to revert to normal priorities.
| list-number | Arbitrary integer between 1 and 10 that identifies the priority list selected by the user. |
| queue-keyword | Priority queue type: high, medium, normal, or low. |
| 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 hex value (for example, C1). For a non-SDLC link, the address format can be specified by the stun schema command. |
Use the queue-list protocol bstun global configuration command to customize BSTUN queuing priorities based on the BSTUN header. Use the no form of this command to revert to normal priorities.
| 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 BSC address and places packets with the BSTUN header that match BSC address on the specified output queue. |
Use the queue-list protocol ip tcp global configuration command to customize BSTUN or priorities based on the TCP port. Use the no form of this command to revert to normal priorities.
| 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. |
| tcp-port-number | BSTUN port and priority settings are as follows:High - BSTUN port 1976Medium - BSTUN port 1977Normal - BSTUN port 1978Low - BSTUN port 1979STUN port and priority settings are as follows: High - STUN port 1994Medium - STUN port 1990Normal - STUN port 1991Low - STUN port 1992. |
Use the sdlc address ff ack-mode interface configuration command to configure the IBM reserved address FF as a valid local (not broadcast) address.
Use the sdlc virtual-multidrop interface configuration command 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 no form of this command to disable the SDLC broadcast feature.
Use the show bsc privileged EXEC command to display statistics about the interfaces on which BSC is configured.
Use the show bstun privileged EXEC command to display the current status of STUN connections.
Use the show stun privileged EXEC command to display the current status of STUN connections.
Use the show stun sdlc EXEC command to display the status of the STUN interfaces using SDLC encapsulation and whether proxy polling is enabled for that interface.
Use the stun group interface configuration command to place each STUN-enabled interface on a router in a previously defined STUN group. Use the no form of this command to remove an interface from a group.
| group-number | Integer in the range 1 through 255. |
Use the stun keepalive-count global configuration command to define the number of times to attempt a peer connection before declaring the peer connection to be down. Use the no form of this command to cancel the previous definition.
| count | Number of connection attempts. The range is between 2 and 10 retries. |
Use the stun peer-name global configuration command to enable STUN on IP addresses. Use the no form of this command to disable STUN on an IP address.
| ip-address | IP address by which this STUN peer is known to other STUN peers. |
Use the stun protocol-group global configuration command to create a protocol group. Use the no form of this command to remove an interface from the group.
| group-number | Integer in the range 1 through 255. |
| basic | Indicates a non-SDLC protocol. |
| sdlc | Indicates an SDLC group. |
| schema | Indicates a custom protocol. |
| sdlc-tg | (Optional) Used in conjunction with the sdlc keyword. Identifies the group as part of an SNA transmission group. |
Use the stun remote-peer-keepalive global configuration command to enable detection of the loss of a peer.
| seconds | Keepalive interval, in seconds. The range is 1 to 300 seconds. The default is 30 seconds. |
Use the stun route address interface dlci interface configuration command to configure direct Frame Relay encapsulation between STUN peers with SDLC local acknowledgment. Use the no form of this command to disable the configuration.
| sdlc-addr | Address of the serial interface. |
| interface frame-relay-port | Port number. |
| dlci number | DLCI number. |
| localsap | Local connecting SAP. |
| local-ack | Enable local acknowledgment. |
Use the stun route address interface serial interface configuration command to forward all HDLC traffic of a serial interface. Use the no form of this command to disable this method of HDLC encapsulation.
| 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. |
Use the stun route address tcp interface configuration command to specify TCP encapsulation and optionally establish SDLC local acknowledgment (SDLC Transport) for STUN. Use the no form of this command to disable this method of TCP encapsulation.
| address-number | Number that conforms to TCP 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. |
Use the stun route all interface serial interface configuration command to encapsulate and forward all STUN traffic using HDLC encapsulation on a serial interface.
| 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. |
Use the stun route all tcp interface configuration command to use TCP encapsulation and forward all STUN traffic on an interface regardless of what address is contained in the serial frame.
| 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 far serial link. |
Use the stun schema global configuration command to define a protocol other than SDLC for use with STUN. Use the no form of this command to disable the new protocol.
| name | Name that defines your protocol. It can be up to 20 characters long. |
| offset constant-offset | Constant offset (in bytes) for the address to be found in the frame. |
| length address-length | Length (in bytes) in one of the following address formats:decimal (4 bytes)hexadecimal (8 bytes)octal (4 bytes) |
| format format-keyword | Format to be used to specify and display addresses for routes on interfaces that use this STUN protocol. The allowable format keywords are: decimal (0 through 9) hexadecimal (0 through F) octal (0 through 7) |
Use the stun sdlc-role primary interface configuration command to assign the router the role of SDLC primary node. Primary nodes poll secondary nodes in a predetermined order.
Use the stun sdlc-role secondary interface configuration command to assign the router the role of SDLC secondary node. Secondary nodes respond to polls sent by the SDLC primary by transmitting any outgoing data they might have.
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