The Bisync Serial Tunnel (BSTUN) feature enables support for devices that use the Bisync datalink protocol. This protocol enables enterprises to transport Bisync traffic over the same network that supports their Systems Network Architecture (SNA) and multiprotocol traffic, which eliminates the need for separate Bisync facilities. With Frame Relay, you can use the local acknowledgment feature to provide local termination of the session on the BSTUN peer.
In this example, BSTUN Point-to-Point is configured with Local Ackowledgement over Frame Relay. The relevant states in the show bstun command output are highlighted in the this document.
Note: Although the debug bstun packet/event and debug bsc packet/event commands should not cause excessive CPU utilisation, the logging buffered command is used to copy the output to the log file.
There are no specific requirements for this document.
The information in this document is based on Cisco IOS® Software Release 12.1(5).
For more information on document conventions, refer to Cisco Technical Tips Conventions.
In this section, you are presented with the information to configure the features described in this document.
Note: To find additional information on the commands used in this document, use the Command Lookup Tool (registered customers only) .
This document uses this network setup:
This document uses these configurations:
Kilcot |
---|
Building configuration ! version 12.1 service timestamps debug datetime msec ! hostname kilcot ! ! bstun peer-name 100.1.1.1 bstun protocol-group 72 bsc-local-ack ! ! interface Loopback0 ip address 100.1.1.1 255.0.0.0 ! interface Serial0/0 ip address 10.1.1.1 255.0.0.0 encapsulation frame-relay no ip mroute-cache frame-relay interface-dlci 16 frame-relay lmi-type ansi ! interface Serial1/0 no ip address ip directed-broadcast encapsulation bstun no ip mroute-cache no keepalive full-duplex clockrate 9600 bstun group 72 bsc secondary bstun route all tcp 200.2.2.2 ! ! router rip network 10.0.0.0 network 100.0.0.0 ! end |
Party |
---|
Building configuration... version 12.1 ! service timestamps debug datetime msec ! hostname party ! bstun peer-name 200.2.2.2 bstun protocol-group 72 bsc-local-ack ! ! interface Loopback0 ip address 200.2.2.2 255.255.255.0 ! interface Serial0 no ip address encapsulation bstun load-interval 30 no keepalive full-duplex clockrate 9600 bstun group 72 bsc primary bstun route all tcp 100.1.1.1 ! interface Serial1 ip address 10.1.1.2 255.0.0.0 encapsulation frame-relay IETF no ip mroute-cache frame-relay interface-dlci 17 frame-relay lmi-type ansi ! ! router rip network 10.0.0.0 network 200.2.2.0 ! end |
This section provides information you can use to confirm your configuration works properly.
Certain show commands are supported by the Output Interpreter Tool (registered customers only) , which allows you to view an analysis of show command output.
show bstun
show bsc
kilcot#show bsc BSC local-ack on Serial1/0: secondary state is CU_Idle. Control units on this interface: Poll address: 40. Select address: 60 *CURRENT-CU* State is Initializing. Tx Counts: 0 frames(total). 0 frames(data). 0 bytes. Rx Counts: 3 frames(total). 0 frames(data). 15 bytes. Total Tx Counts: 0 frames(total). 0 frames(data). 0 bytes. Total Rx Counts: 19 frames(total). 0 frames(data). 59 bytes. kilcot#show bstun This peer: 100.1.1.1 *Serial1/0 (group 72 [bsc-local-ack]) route transport address dlci lsap state rx_pkts tx_pkts drops all TCP 200.2.2.2 open 1 3 0 party#show bsc BSC local-ack on Serial0: primary state is TCU_Polled. Control units on this interface: Poll address: 40. Select address: 60 *CURRENT-CU* State is Inactive. Tx Counts: 126 frames(total). 0 frames(data). 378 bytes. Rx Counts: 0 frames(total). 0 frames(data). 0 bytes. Total Tx Counts: 126 frames(total). 0 frames(data). 378 bytes. Total Rx Counts: 0 frames(total). 0 frames(data). 0 bytes. party#show bstun This peer: 200.2.2.2 *Serial0 (group 72 [bsc-local-ack]) route transport address dlci lsap state rx_pkts tx_pkts drops all TCP 100.1.1.1 open 3 2 0
This section provides information you can use to troubleshoot your configuration.
The debug bstun packet/event and debug bsc packet/event output has been copied to the log file. When you interpret this debug output:
Serial Data Incoming (SDI)—Packets received from the Synchronous Data Link Control (SDLC) interface.
Network Data Incoming (NDI)—Packets de-encapsulated from the WAN.
Note: Before you issue debug commands, refer to Important Information on Debug Commands.
kilcot#show log Syslog logging: enabled (0 messages dropped, 0 flushes, 0 overruns) Console logging: disabled Monitor logging: level debugging, 0 messages logged Buffer logging: level debugging, 5088 messages logged Trap logging: level informational, 70 message lines logged Log Buffer (100000 bytes): Dec 28 09:43:21.748: BSC: Serial1/0: POLLEE-FSM event: E_LineUp old_state: CU_Down. new_state: CU_Idle. Dec 28 09:43:21.756: BSC: Serial1/0: SDI-rx: Data (5 bytes): 40407F7F2D Dec 28 09:43:36.756: BSTUN bsc-local-ack: Serial1/0 SDI: Data: 401100 Dec 28 09:43:36.756: BSTUN: Change state for peer (all[72])200.2.2.2/1976 (closed->opening) Dec 28 09:43:36.756: BSC: Serial1/0: POLLEE-FSM event: E_RxEnq Dec 28 09:43:36.760: BSTUN: Change state for peer (all[72])200.2.2.2/1976 (opening->open wait) Dec 28 09:43:36.764: %BSTUN-6-OPENING: CONN: opening peer (all[72])200.2.2.2/1976, 3 Dec 28 09:43:36.792: bsttcpd_connect: Refreshing tcp_encaps for group 72 Dec 28 09:43:36.792: %BSTUN-6-OPENED: CONN: peer (all[72])200.2.2.2/1976 opened, [previous state open wait] Dec 28 09:43:36.792: BSTUN: Change state for peer (all[72])200.2.2.2/1976 (open wait->open) Dec 28 09:43:36.844: BSTUN bsc-local-ack: Serial1/0 NDI: Data: 401400 Dec 28 09:43:36.848: BSC: Serial1/0: NDI-rx: Data (3 bytes): 401400 Dec 28 09:43:37.640: %SYS-5-CONFIG_I: Configured from console by vty0 party#show log Syslog logging: enabled (0 messages dropped, 0 flushes, 0 overruns) Console logging: disabled Monitor logging: level debugging, 114 messages logged Logging to: vty2(114) Buffer logging: level debugging, 5199 messages logged Trap logging: level informational, 79 message lines logged Log Buffer (100000 bytes): ec 28 09:48:09.816: %BSTUN-6-PASSIVEOPEN: passive open 100.1.1.1(11017) -> 1976 Dec 28 09:48:09.836: %BSTUN-6-OPENED: PHDR: peer (all[72])100.1.1.1/1976 opened, [previous state closed] Dec 28 09:48:09.836: BSTUN: Change state for peer (all[72])100.1.1.1/1976 (closed->open) Dec 28 09:48:09.836: BSTUN bsc-local-ack: Serial0 NDI: Data: 401100 Dec 28 09:48:09.836: BSC: Serial0: NDI-rx: Data (3 bytes): 401100 Dec 28 09:48:09.836: BSTUN bsc-local-ack: Serial0 SDI: Data: 401400 Dec 28 09:48:09.836: BSC: Serial0: SDI-tx: Data (10 bytes): 37FF32323240407F7F2D