Lantronix LSB4 Reference Manual
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Lantronix LSB4 Reference Manual

Lantronix LSB4 Reference Manual

Ethernet switch
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Download this manual See also: Installation Manual
The information in this guide may change without notice. The manufacturer assumes no
responsibility for any errors which may appear in this guide.
DEC, thickwire, thinwire, VMS, VT100, and ULTRIX are trademarks of Digital Equipment
Corporation. UNIX is a registered trademark of AT&T. Ethernet is a trademark of XEROX.
NetWare is a trademark of Novell Corp. AppleTalk, Chooser and Macintosh are trademarks of
Apple Computer Corp.
Copyright 1994, Lantronix. All rights reserved. No part of the contents of this book may be
transmitted or reproduced in any form or by any means without the written permission of
Lantronix. Printed in the United States of America.
The revision date for this manual is August 15, 1994.
This equipment has been tested and found to comply with the limits for a Class A digital
device pursuant to Part 15 of FCC Rules. These limits are designed to provide reasonable pro-
tection against such interference when operating in a commercial environment. This equip-
ment generates, uses, and can radiate radio frequency energy, and if not installed and used in
accordance with this guide, may cause harmful interference to radio communications.
Operation of this equipment in a residential area is likely to cause interference in which case
the user, at his or her own expense, will be required to take whatever measures may be
required to correct the interference.
Warning: Changes or modiÞcations to this device not explicitly approved by Lantronix will
void the user's authority to operate this device.
Cet appareil doit se soumettre avec la section 15 des statuts et r•glements de FCC. Le fonction-
nement est subjectŽ aux conditions suivantes:
(1)
Cet appareil ne doit pas causer une interfŽrence malfaisante.
(2)
Cet appareil do"t accepter n'importŽ quelle interfŽrence re"ue qui peut causer une
opŽration indŽsirable.
Part Number: 900-041
WARNING

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  • Page 1 NetWare is a trademark of Novell Corp. AppleTalk, Chooser and Macintosh are trademarks of Apple Computer Corp. Copyright 1994, Lantronix. All rights reserved. No part of the contents of this book may be transmitted or reproduced in any form or by any means without the written permission of Lantronix.
  • Page 2 LSB4 Reference Manual For Lantronix LSB4 Ethernet Switch...

  • Page 3: Table Of Contents

    Contents Introduction About This Manual ....................1-1 Manual Conventions ....................1-2 System Commands Introduction .......................2-1 Set/Define System ....................2-2 Show/Monitor/List System ..................2-4 Set Privileged ......................2-5 Protocol Commands Introduction .......................3-1 Set/Define Protocol ....................3-2 Show/List Protocol ....................3-4 Port Commands Introduction .......................4-1 Set/Define Port ......................4-2 Show/Monitor/List Port ..................4-4 SNMP Commands Introduction .......................5-1 Set/Define SNMP .....................5-2...
  • Page 4 Filter Commands Introduction .......................6-1 Configuring a Filter List ...................6-2 Set/Define Filter .......................6-4 Show/List Filter ......................6-11 Clear/Purge Filter ....................6-12 Switch Commands Introduction .......................7-1 Set/Define Switch .....................7-2 Show/Monitor/List Switch ..................7-5 Save Command Introduction .......................8-1 Save ..........................8-2 Miscellaneous Commands Introduction .......................9-1 Cls ..........................9-2 Finger ..........................9-2 Help ..........................9-2 Initialize ........................9-3...
  • Page 5 Introduction About This Manual ......................... 1-1 Manual Conventions ......................1-2 Required Parameters .................... 1-2 Optional Parameters ..................... 1-2 User Defined Parameters ..................1-2 Restrictions ......................1-2...

  • Page 6: Introduction

    This manual lists all commands that can be used in conjunction with the LSB4. These commands can be used to configure the switch to specific needs, such as limiting access to the switch or setting a particular data transfer rate.

  • Page 7: Manual Conventions

    Introduction LSB4 Reference Manual To determine the Manual Conventions syntax of a particu- lar command, con- All command names are displayed in all capital letters. Manual conventions sult the section for command parameters are discussed in the following paragraphs. covering that com- mand.

  • Page 8: System Commands

    System Commands Introduction ..........................2-1 Set/Define System ........................2-2 Show/Monitor/List System ....................2-4 Set Privileged ........................... 2-5...

  • Page 9: Introduction

    Save command.) Conversely, Define out. makes a permanent change, but it doesn't take effect until the LSB4 is rebooted. The Show and List commands function in a similar manner to the Set/Define commands. Show displays the current settings (including those Set but not saved as permanent changes).

  • Page 10: Set/Define System

    The default CurrentPswd CurrentPswd is Any combination of six digits or letters. access. Name Changes the LSB4Õs name. This name is used to connect to the LSB4 from remote hosts. If the specified Name contains systemname lower-case letters, it Any combination of up to sixteen characters. When the LSB4 must be enclosed in is shipped, the system name is in the form LSB4_xxxxxx.
  • Page 11 If lower-case letters are used, the includes the current name of the LSB4. promptstring must includes the LSB4 description characters. be enclosed in quo- tation marks.

  • Page 12: Show/Monitor/List System

    The counters represent traffic to the switch (telnet sessions traffic to the switch, ping traffic to the switch, etc.), not traffic that is being forwarded. The counters are reset every time the LSB4 is turned on, re- booted, re-initialized, or a Zero Counters System command is entered.

  • Page 13: Set Privileged

    When the privileged password is accepted, supervisor status is given. This status will remain in effect until the user logs out of the LSB4, a Set Privileged Override command is entered, or a Set Noprivileged command is entered. Override Permits user to obtain supervisor status when another user is currently logged into the LSB4 with supervisor status.
  • Page 14 System Commands LSB4 Reference Manual...

  • Page 15: Protocol Commands

    Protocol Commands Introduction ..........................3-1 Set/Define Protocol ........................ 3-2 Show/List Protocol ......................... 3-4...

  • Page 16: Introduction

    SpeciÞes a host from which to download software to the LSB4 Table 3-1: Set/Define Protocol Parameters Show/List Protocol For an explanation of the Show and List commands, see Show Protocol and List Protocol display the status of the LSB4Õs protocol set- page 2-1. tings.

  • Page 17: Set/Define Protocol

      DISABLED   When the LSB4 is booted up, the AppleTalk, IP, and Netware protocols (dis- cussed below) are enabled. To improve performance, disable any protocols that are not being used. A protocol cannot be ÒsetÓ to enabled...
  • Page 18 0 and 255. Netware Loadhost Specifies the name of a Netware file server to be used to download software to the LSB4. servername Any combination of characters. If the specified name contains lower case letters, it must be enclosed in quotation marks.

  • Page 19: Show/List Protocol

    Protocol Commands LSB4 Reference Manual Set/Define Protocol (cont.) Restrictions This command requires privileged status. Examples Local> SET PROTOCOL IP LOADHOST “elmer.cid.ins.com” Local> SET PROTOCOL APPLETALK ZONE “Lab_Zone” Local> SET PROTOCOL NETWARE LOADHOST “Acct_Fserv” See Also Set Privileged, page 2-5. Show/List Protocol ...

  • Page 20: Port Commands

    Port Commands Introduction ..........................4-1 Set/Define Port ........................4-2 Show/Monitor/List Port ....................... 4-4...

  • Page 21: Introduction

    LSB4 Reference Manual Port Commands Introduction Port commands are used to specify, configure and display the different port set- tings for the LSB4Õs serial console port. Set/Define Port Set Port and Define Port accept the following parameters: For an explanation ♦...

  • Page 22: Set/Define Port

    Port is entered from a terminal connected to the serial console port, the specified configurations will take effect and will be placed into permanent memory when the user logs out of the switch. If remotely logged into the LSB4, the configura- tions will take effect when the user logs out of the port.
  • Page 23 Specif- ically, the DTR signal will drop when the modem connected to the serial console port logs out. The LSB4 will assume a log out when the DSR signal (provided to the serial console port) drops.

  • Page 24: Show/Monitor/List Port

    Specifies either the serial console port or one of the devices currently logged into the LSB4. Port numbers are assigned se- quentially as each device logs into the LSB4. To determine a particular port number, enter the Show Users command or the Show Port All command.

  • Page 25: Snmp Commands

    SNMP Commands Introduction ..........................5-1 Set/Define SNMP ........................5-2 Show/List SNMP ........................5-3...

  • Page 26: Introduction

    Set and De- These commands specify which users can configure and obtain information fine commands, see from the LSB4 using SNMP. page 2-1. Show/List SNMP Show SNMP and List SNMP display the current status and settings of SNMP re- For an explanation strictions.

  • Page 27: Set/Define Snmp

    SNMP requests. Parameters Community An identification provided in SNMP packets that specifies a particular community. The LSB4 will respond to SNMP pack- By default, SNMP ets that contain the community name specified by this param- traffic containing eter.

  • Page 28: Show/List Snmp

    LSB4 Reference Manual SNMP Commands Show/List SNMP   SHOW   SNMP   LIST Show SNMP and List SNMP display the SNMP community names and access types.
  • Page 29 SNMP Commands LSB4 Reference Manual...

  • Page 30: Filter Commands

    Filter Commands Introduction ..........................6-1 Configuring a Filter List ......................6-2 Set/Define Filter ........................6-4 Show/List Filter ........................6-11 Clear/Purge Filter ......................... 6-12...

  • Page 31: Introduction

    When a filter is identified with a filter command, it is placed on a list stored in be associated with the LSB4. In order to activate the filters, a filter list must be associated with a par- one or all ports.

  • Page 32: Configuring A Filter List

    To configure a filter list, the filter list must be associated with one of the LSB4Õs LAN ports. The LSB4 can only have as many filter lists as it does LAN ports; as it has four ports, it can support a maximum of four filter lists. A single filter list can be as- sociated with one or all ports.
  • Page 33 When traffic destined for a specific segment reaches the LSB4, it will be compared to a filter list; if it is any but a specified type of traffic, it hits a ÒfirewallÓ and goes no further--the packet is discarded.

  • Page 34: Set/Define Filter

    Specifies that every data packet will be allowed or denied pas- sage through the LSB4. Using the All parameter and specify- ing Allow or Deny will affect all data packets regardless of any filter specifications that follow.
  • Page 35 Set/Define Filter (cont.) Refer to Appendix B Parameters Multicast of the LSB4 Instal- Permits or denies passage of data packets containing multi- cast messages. If the Spanning Tree Algorithm and Multicasts lation Guide for are disabled, BPDU packets will not be forwarded.
  • Page 36 Filter Commands LSB4 Reference Manual Set/Define Filter (cont.) Source address Destination address Permits or denies passage of data packets that have originated from and are destined for a specific node on the local area net- work. Entering this command once filters traffic between two nodes in one direction only--from the source to the destination.
  • Page 37 Up to three hexadecimal characters long and defines where in the data packet the LSB4 is to look for the specified pat- tern. The hexadecimal characters must be preceded by 0x. offset may be a hexadecimal value from 000 to 5ff. 000 indi- cates the first data position in the data packet.
  • Page 38 Figure 6-9: Preventing IP Packets all IP data packets containing all of its level two and three pro- tocols will be denied passage through the LSB4, with the ex- ception of the TCP/IP data packets allowed by the preceding command.
  • Page 39 LSB4 Reference Manual Filter Commands Set/Define Filter (cont.)   protocol ident –        ATP PAP      APPLETALK         RTMP   ...
  • Page 40 An asterisk ( * ) may be substituted for up to three of the four hexadecimal characters as a wild card character. When an as- terisk is present, the LSB4 will accept any value in that posi- tion. Sport portIdent / Dport portIdent Filters data packets based on both a protocol and the source or destination protocol port of the data packet.

  • Page 41: Show/List Filter

    LSB4 Reference Manual Filter Commands Show/List Filter   SHOW filtr   FILTER   LIST Parameters Filter Displays the specified filter list. filtr A value between 1 and 4. Displays all filter lists. If the filtr and All parameters are omit- ted, all filters will be shown or listed.

  • Page 42: Clear/Purge Filter

    Clear/Purge Clear removes one or all filters from the filter list entered us- ing the Set Filter command. Purge removes one or all filters from the filter list in the LSB4's permanent memory. Filter Identifies a filter list to be cleared or purged.

  • Page 43: Switch Commands

    Switch Commands Introduction ..........................7-1 Set/Define Switch ........................7-2 Show/Monitor/List Switch ....................7-5...

  • Page 44: Introduction

    7chapternumber LSB4 Reference Manual Switch Commands Introduction Switch commands are used to configure and display the LSB4Õs switch func- tions, including Spanning Tree configurations, updates to the address table, and port priority values. Set/Define Switch Set Switch and Define Switch accept the following parameters: For an explanation ♦...

  • Page 45: Set/Define Switch

    Assigns a maximum time by which a BPDU packet must be received in order for the current root to remain the root. When the LSB4 has not heard from the root (received a BPDU pack- et) by this time, it will assume that the root is down and will attempt to find a new root.
  • Page 46 The default value is A number between 0 and 32768. The higher the value as- 32768. signed to the LSB4, the less likely it is that the LSB4 will be- come the root. Spanning Tree Spanning Tree is Enables or disables the Spanning Tree Algorithm.
  • Page 47 Filter Associates a filter list with one or all of the LSB4's LAN ports. filtr A value between 1 and 4 corresponding to a particular filter list specified by Set/Define Filter commands.

  • Page 48: Show/Monitor/List Switch

    Displays current settings as specified by Set or Define Switch commands. If the LSB4 is not the root, then the Weed, Maximum Age, For- ward Delay, and Hello Time values will be determined by the switch that is the root on the network. In this case, Show/ Monitor/List Switch Status commands will list the rootÕs val-...
  • Page 49 Switch Commands LSB4 Reference Manual Show/Monitor/List Switch (cont.) Displayed below are the results of the Show/Monitor Switch Ethernet port com- mand entered on an LSB4 [Figure 7-1]: Switch Counters LSB4 Version V1.0/1(940119) Topology Changes: 11 Time Since Enabled: 1:15:07 Packets Received...
  • Page 50 Missed Packets Displays the total number of packets ÒdroppedÓ by the LSB4. This occurs when See Receive Queue the LSB4 has used all of its memory re- Overrun on sources for buffering incoming packets page 7-8. (RBA/RRA); this number should be small.
  • Page 51 Displays the total number of ethernet pack- ets forwarded to all non-receiving ports. This occurs when the packetÕs destination address is unknown. If the LSB4 does not know where to forward the packet, it will forward it onto all of its LANs.
  • Page 52 LSB4 attempted to transmit onto the LAN See Transmit but could not. This condition usually oc- Queue Size, below. curs when the LSB4 has its allocated Trans- mit Buffers exhausted. ♦ Transmit Queue Size Of the total number of transmit slots avail-...
  • Page 53 Switch Commands LSB4 Reference Manual 7-10...

  • Page 54: Save Command

    Save Command Introduction ..........................8-1 Save ............................8-2...

  • Page 55: Introduction

    LSB4 Reference Manual Save Command Introduction The Save command is used to store current LSB4 settings in permanent memory. When a Save command is entered, temporary configurations made with a corre- sponding Set command will be stored in NVRAM. The newly-saved configura- tions will overwrite settings made with the Define command and will take effect the next time that the LSB4 is turned on, rebooted, or initialized.

  • Page 56: Save

       BRIDGE  Parameters Port Saves the specified portÕs current settings in the LSB4Õs per- manent memory. A value between 1 and 4. System Saves all current system configurations in the LSB4Õs perma- nent memory. Protocol Use caution with Saves the current IP, Netware, or AppleTalk configuration in Save commands;...
  • Page 57 LSB4 Reference Manual Save Command Save (cont.) Restrictions This command requires privileged status. Examples Local>> SAVE FILTER 3 Local>> SAVE PROTOCOL APPLETALK Local>> SAVE SYSTEM Local>> SAVE FILTER ALL See Also Set Privileged, page 2-5.
  • Page 58 Save Command LSB4 Reference Manual...

  • Page 59: Miscellaneous Commands

    Miscellaneous Commands Introduction ..........................9-1 Cls .............................. 9-2 Finger ............................9-2 Help ............................9-2 Initialize ............................ 9-3 Lock ............................9-4 Logout ............................9-5 Netstat ............................9-5 Ping ............................9-5 Show Users ..........................9-6 Unlock ............................9-6 Zero Counters .......................... 9-7...

  • Page 60: Introduction

    The following commands are discussed in this chapter: ♦ Cls: Clears the terminal screen ♦ Finger: Displays information about users of the LSB4 or other hosts on the network ♦ Help: Accesses the switch help text ♦ Initialize: Initializes (ÒrebootsÓ) the LSB4 ♦...

  • Page 61: Cls

    Finger ] @hostname FINGER username This command is similar to the UNIX finger command. It will display informa- tion about different users of the LSB4 or other hosts on the network. Parameters username Any combination of characters. hostname Any combination of characters, or an IP address.

  • Page 62: Initialize

     RELOAD   The Initialize command has the same effect as turning the LSB4 off and on. Un- less Define or Save commands have been entered, all values and conditions spec- ified by Set commands will be lost. Parameters...

  • Page 63: Lock

    LSB4 Reference Manual Lock LOCK The Lock command is used to restrict access to an LSB4 session. Lock is often used when a user wishes to maintain an LSB4 session, but temporarily leave his or her terminal unattended. When issued, the Lock command will prompt for a password, then prompt for the same password a second time to verify it.

  • Page 64: Logout

    Logout is used to log out of an LSB4 port. If the LSB4 has been logged into from a network using one of the network ports, the network session is terminated. If it was logged into from the console port, the console settings are reloaded from non-volatile RAM.

  • Page 65: Show Users

    Miscellaneous Commands LSB4 Reference Manual Show Users SHOW USERS This command will display information about all users currently logged into the LSB4. Unlock UNLOCK PORT port This command unlocks a previously locked port. Parameters port A value between 1 and 4 representing the port number to be unlocked.

  • Page 66: Zero Counters

      BRIDGE ETHERNET port   This command resets the LSB4's counters. Parameters System Resets the counters related to login events on the two LAN ports and the serial console port. Resets the counters on all ports. Ethernet port Resets the counters on a specified LAN port.
  • Page 67 Miscellaneous Commands LSB4 Reference Manual...

  • Page 68: Technical Support

    Aappnumber Technical Support If you are experiencing problems with the LSB4 or have suggestions for improving the product, please contact Lantronix Technical Support at the address or phone number listed below. We are also reachable via Internet email at support@lantronix.com.

  • Page 69: Glossary

    This en- ables the LSB4 to know which of its ports to forward traffic to. If no packets are received by the LSB4 from an address within a cer- tain time period (weed time; see page iii), the address is deleted from the table.
  • Page 70 To construct a firewall, see page 6-3. Flood When the LSB4 receives a packet destined for a specific address that is not in its address table, it forwards the packet to all of its ports. This is called flooding.
  • Page 71 A packet that is destined for only one node on a network. Weed Time If the LSB4 doesnÕt hear from a hardware address for a period of time, it will remove the address from its address table (see page i). This time in- terval is the weed time -- the time that the LSB4 will wait before Òweed-...

  • Page 72: Index

    Index AppleTalk Filter ......... 3-4 ........8-2 Show/List Protocol Save command .......... 6-1 AppleTalk Zone Filter Commands ....3-2 ........6-2 Set/Define Protocol command Filter lists, creating ........6-3 Firewalls, creating Bootparams ..2-4 Show/Monitor/List System command Incoming ....2-2 Set/Define System command IP IPaddress ....
  • Page 73 (cont.) ........1-2 Manual conventions Prompt ....... 1-2 ....2-3 Optional parameters Set/Define System command ......1-2 Required parameters Protocol ......1-2 ........8-2 User defined parameters Save command Modem Control ....... 4-3 Set/Define Port command ......... 4-4 Monitor Port command .............B-3 RJ45 ......
  • Page 74 Telnet ....2-2 Set/Define System command Type ....... 4-3 Set/Define Port command Index-iii...

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