Operation. RTU500 series Connection and Settings Switch 560NMD11

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1 Connection and Settings Switch 560NMD11 Application, characteristics and technical data have to be taken from the hardware data sheet 560NMD11 R KGT Operation The 560NMD11 is a 10/100 Mbps autonegotiating managed Ethernet switch with four RJ45 ports. Additionally, the unit provides one SDSL port (up to 11.4 Mbps) for use with 2-wire copper lines and one SFP slot for use with fibre optic transceivers. Fig. 1: Connectors and Pinout 560NMD11 Power Connection Power should be connected to the device by the connector X1. The 560NMD11 supports a nominal voltage between +24 and +60 VDC ±20%. Alarm Signalling The 560NMD11 is equipped with an Alarm relay indicating a malfunction of the device (default) and several configurable alarm conditions. The alarm relay may be connected by the connector X2. Contacts 1 and 3 are connected in alarm state while contacts 1 and 2 are connected during normal operation. In unpowered state, 1 and 3 are connected. Safety The device shall be powered off while accessing any of the connectors X1 or X2. Any other connector (e.g. Ethernet, RS232 or DSL/X3) are hot-pluggable while the device is operating. Doc.-No.: 1KGT V

2 Connections and Settings Switch 560NMD11 SDSL Interface For using Ethernet over private 2-wire communication lines of up to 20 km distance, the device provides a SDSL interface with a maximum transmission rate of 11.4 Mbps full duplex. Signal lines are connected via the connector X3 and labeled DSL A and DSL B for the 2-wire pair. Whenever possible, a shielded twisted pair communication cable should to be used for SDSL signals. Any SDSL port supports auto-crossover detection and correction, so signals A and B may be interchanged. The port is equipped with a medium and fine overvoltage protection circuit. For the protection to work, it is essential that the protective ground (SHIELD) of the DSL line is connected to the protective ground of the rack or station as directly as possible. A coarse protection is required at the entrance of the communication line to the building. The signal lines are short-circuit protected and may be connected while the module is powered and working. Fibre Optic Interface For using Ethernet over private fibre optic communication lines of up to 40 km distance, the device provides a SFP slot with a transmission rate of 100 Mbps full (default) or half duplex. For fiber optical applications, the SFP slot may be equipped with different SFP (Small Form-factor Pluggable) modules, which have to be ordered separately. The modules available are 560NFO85, 560NFO13 and 560NFO15 which are able to bridge distances of up to 40 km. While 560NFO85 is suited only for multimode fibre glass (MMF) with 50/125 µm or 62.5/125 µm diameter the two other modules are to be used with single mode fibre glass (SMF) with a diameter of 9/125 µm. All mentioned SFP modules use lasers with 1310 nm wavelength and a LC/PC Duplex connector. Transmit (TX) and Receive (RX) paths are outlined in Fig. 2. are used only a subset or none of the parameters and properties may be displayed. Insertion After removal of the dust cover of the slot of the 560NMD11, the modules can be simply plugged into any empty module slot. Removal The module is mechanically locked after insertion. To remove the module, push the latch at the bottom-side of the module and pull the module out of its slot. The latch to be pushed may be coloured black or blue. Fig. 3: Removal of SFP module Insertion and Removal is allowed to be done while the 560NMD11 is powered up and operating. RS232 Interfaces The 560NMD11 consists of two RS232 interfaces named Con0 and Con1 usable for configuration or tunneling of serial data (default baudrate of both is 57600, 8N1). The RS232 parameters baudrate, parity and stopbits are configurable. The RS232 interfaces can be connected by a 6- pin RJ-12 plug, the pinout is given in Table 1. Fig. 4: RS232 Interface Fig. 2: SFP module signals The parameters and properties (e.g. SFP type, wavelength, range, receive power, ) of an inserted managed SFP can be read out and monitored by the switch software. The command <show switch fo1> displays these properties. If unmanaged SFPs Doc.-No.: 1KGT V

3 Connections and Settings Switch 560NMD11 Pin Signal 1 DCD 2 CTS 3 RTS 4 GND 5 RXD 6 TXD Table 1: Pinout RS232 interface Ext Interface The 560NMD11 consists of a proprietary extension bus interface labeled Ext for additional functionality. The interface can be used with a configuration stick to store a copy of the configuration of the device. Applications are: - The simple replacement of a failed device without knowing the configuration. The configuration stick is always attached to the device. A replacement is possible by installing a new device and plugging the configuration stick of the failed device to the new device. The configuration of the failed device will be applied to the new device. - Use of a default configuration on the stick. The stick may be given any configuration, e.g. SNMP servers, syslog or time servers that are common to a network. A new device may be prepared first with the default configuration by inserting the stick and a custom configuration (e.g. IP address) afterwards by manually entering commands. For more information refer to Storing the Configuration on page 5. Configuration The configuration of the 560NMD11 switch can be performed via telnet, secure shell (SSH) or an integrated webserver. For configuration via Telnet or SSH a Telnet or SSH-capable device like a computer has to be connected to an Ethernet port of the 560NMD11 device. The default IP configuration is stated in Table 2. Property Value IP Address Subnet Mask Gateway Table 2: Default IP configuration For the configuration via an integrated webserver, any common webbrowser may be used. In default mode remote access is restricted to SSH; Telnet and webserver access are disabled. SSH may not be immediately ready for connection, by default a red alarm LED will blink until SSH is ready to accept a connection. This may take a few minutes after startup, also refer to SSH Secure Shell on page 17 for more information. Telnet can be enabled by the command <set telnet enable> entered within a SSH session or locally by a configuration cable connected to any RS232 interface. The integrated webserver may be activated by the command <set system web-server enable>. Both commands require enabled-mode privileges (command: <enable>). If the IP configuration has been changed and is unknown, the configuration of the device (including other parameters) can be reset to its default values by connecting to the device via the RS232 interface Con0 with a terminal program and pressing the key i while the memory test is executing at power-up. Attention: The configuration is not automatically saved; refer to Storing the Configuration on page 5. Command line Connecting to the switch via Telnet, SSH or RS232 will present a command line interface. It will accept textual commands from the user. After entering a command it has to be executed by the <Enter>-key. The command interpreter accepts abbreviated commands as long as they are unique. The command <show switch> can therefore be abbreviated by <sh sw>; However it can t be abbreviated by <s sw> since <s> may mean <show> or <set>. All commands available in the current context can be listed by typing the key <?> after a command or part of a command. For example <s?> may list all matches for commands starting with s (<set> and <show>), while <show?> (with space between show and? ) will list all command that are available for the subcommand <show> (e.g. <show switch> or <show runningconfig>). Security and Login The access to the parameters of the 560NMD11 is protected by applying a two-level access restriction. If configured, a logon-pass has to be Doc.-No.: 1KGT V

4 Connections and Settings Switch 560NMD11 entered when accessing the device. In this mode, it is possible to read parameters, statistics and certain properties. For SSH connections a username is needed. This username is always edslogin. The password based log on procedure can be replaced by a RADIUS procedure if desired (refer to RADIUS on page 16). If parameters are changed, an enable-pass is necessary. The following commands control this protection. <set loginpass {password}> Defines the password for access to the device via Telnet, SSH or webbrowser. In delivery state, the password is empty. When no password is defined, no password request takes place; the instruction line is immediately available. The login password can be cleared by either using the set-command with no password or entering the command <clear loginpass>. <enable> Puts the system into the so-called enabled mode, in which the control commands of the system are accessible. This requires a password entry if a password is set. Via <disable> the system is switched back to normal operating mode. <set enablepass {password}> Defines the password for the enabled mode, in which additional commands are valid. In delivery state the password is empty. A password set can be cleared by either using the set-command with no password or entering the command <clear enablepass>. <disable> Puts the system from the enabled mode back into the so-called normal mode, in which the control commands of the system are not accessible. In delivery state, normal mode is activated. Fig. 5: Security and logon states IP address configuration IP addressing information can be configured via the commands listed below. <set system ip {IP-Address}> Assigns an IP address for management and diagnostic purposes to the system. In standard configuration, the IP address is active. The IP address should be changed as soon as possible! <set system gateway {IP-Address Gateway}> Assigns a gateway IP address for packets that leave the local network. In standard configuration, the address is assigned. <set system subnetmask {IP Subnetmask}> Assigns an IP subnet mask to the system. In standard configuration, the subnet mask is active. If a VLAN configuration is used the system IP may be put into a VLAN by applying the command <set system vlan { none}>. The assigned IP address and other basic information can be viewed with the command <show system>. Ethernet Interfaces The Ethernet interfaces can be activated (default state) by the command <set switch portn no shutdown> by replacing N with the port numbers 1 to 4. Respectively, the interface is deactivated with <set switch portn shutdown>. Duplex configuration can be set to full- and halfduplex or auto negotiated with the command <set interface fastethernet0 duplex [full half auto]>. The default setting is auto. The supported transmission rates 10 and 100 Mbps or auto-negotiation may be configured by <set interface fastethernet0 speed [ auto]>. The default setting is auto. A brief summary of the ports can be viewed with <show switch>. SDSL Interfaces Note: For the device 560NMD11 only one SDSL interface named dsl1 exists. The SDSL interfaces are administratively down in default state. The command to activate any of the interfaces is <set interface [dsl1 dsl2] no shut- Doc.-No.: 1KGT V

5 Connections and Settings Switch 560NMD11 down>, to deactivate the interface it is <set interface [dsl1 dsl2] shutdown>. To establish a SDSL connection one side of the connection has to be set to the mode master while the opposite side hast to be set to slave. The setting can be adjusted by the command <set interface [dsl1 dsl2] mode [master slave]>. By default dsl1 is in master -mode, dsl2 is in slave - mode. The transmission rate can be changed with <set interface [dsl1 dsl2] speed {speed}>. Valid values for speed are 192 to in steps of 64 (data rate in kbit/s) and ext-auto. When ext-auto is used, the module tries to negotiate one of the following data rates with the partner station: 192, 256, 512, 768, 1024, 1536, 2048, 3072, 4096, 5696 kbit/s If the partner station is set to one of the 10 data rates, this is negotiated by both participants. If both participants are set to ext-auto, the line is measured and the highest possible data rate is chosen. In standard configuration (delivery state), the speed of the DSL-1 interface is set to 192 kbps and the DSL-2 interface is set to auto. In this state, the DSL-1 interface should be configurable without using the focused transmission link. By configuring the data rate of the DSL-1 interface to one of the above mentioned values, both DSL units can negotiate this data rate. Even if no connection can be set up with this data rate, it is still possible to suggest another data rate to the DSL-1 interface with <set interface dsl1 speed {speed}>. By using the command <set interface [dsl1 dsl2] speed {speed}>, an existing connection is immediately interrupted to re-establish the connection with the newly chosen data rate. Special care is advised when the station to be reconfigured can only be reached over the DSL-link. A reasonable approach is to configure the station at the far end with speed = ext-auto. For the local station (or the station closer to the control center) it is possible to try the 10 different data rates. Fibre Optic (SFP) Interfaces The fibre optic interface can be activated (default state) by the command <set switch fo1 no shutdown>, to deactivate the interface the command is <set switch fo1 shutdown>. Duplex configuration can be set to full- or halfduplex with the command <set interface fo1 duplex [full half]>. The default setting is full duplex. The transmission rate is fixed at 100 Mbps. Storing the Configuration There is a difference between the configuration after a restart of the system (startup-config) and the active configuration the system works with (running-config). Entered commands are only stored in the running-config. The commands below are used to synchronize and work with the two configurations. <write> or <copy running-config startup-config> Saves the current system configuration as startup configuration. <show startup-config> Displays the configuration that is loaded after a restart of the system. <show running-config> Displays the active configuration the system currently works with. <copy startup-config tftp> Copies the start configuration to a TFTP server within the network. <clear startup-config> Deletes the startup configuration. After a restart, all interfaces are deactivated and the device must be parameterized via the configuration interface. Additionally it is possible to use a configuration stick with the 560NMD11. The configuration stick is hot-pluggable. If the device is powered up with a stick attached, the configuration stored on the stick will be applied and the startup-configuration of the device is overwritten by the configuration of the stick (stick-config). Plugging in a configuration stick while the device is operating will not change any configuration. The configuration stored within the stick can be displayed by the command below. <show stick-config> Displays the configuration that is stored on an attached configuration stick. As long as the stick is attached a <write> or <copy running-config startup-config> command will also write to the configuration stick to keep the configuration of the stick and the configuration stored in the device the same. If a running-config shall only be saved to a configuration stick but not to the locally stored configuration the command <copy running-config stick-config> can be used. A configuration stick can be protected from write operation by setting it to read-only. <set config-stick read-only> Write protects the configuration stick. <set config-stick no read-only> Enables write operation to the configuration stick. Doc.-No.: 1KGT V

6 Connections and Settings Switch 560NMD11 The command <show hardware> will show if a configuration stick is attached. If no configuration stick is attached the corresponding entry will not show up. Webserver The webserver allows users to configure and monitor the device in a convenient and intuitive way. The browser is directed towards the webserver by typing the device s IP address in the browser s address line. A two step privilege model is used: to access the login area (read-only access, no settings can be changed), enter the login password along with the username weblogin when prompted by the webserver. To access the enable area, enter the enable password along with the username weblogin. Both passwords are initially empty. They can be changed in the webserver or by using the commands <set loginpass *> and <set enablepass *>. Webserver pages are provided to view and download: The device s start- and running configuration for interface settings including port state, port mirroring and port rate limiting. Interface configuration including port state, port mirroring and port rate limiting. The IP configuration, SNMP settings, SNTP, Syslog and STP preferences. A command browser page allows the execution of most of the commands available via console interface by clicking through a commands tree. Further information concerning hardware, interface statistics and detected neighbour devices is also available. Additionally a firmware update page lets the user update the system software if required. A link to the device s telnet console is also provided. To access the webserver pages use the navigation menu provided on the left side of the pages. TCP and UDP Services and Ports The device 560NMD11 is able to provide certain TCP and UDP services. A list and the default state of these services is shown below. Services in closed state are disabled by default and may be activated by configuration. Notice that port numbers may also be changed by configuration. Service Port State Echo TCP 7 Closed SSH TCP 22 Open Telnet TCP 23 Closed HTTP TCP 80 Closed IEC TCP 2404 Closed TFTP* UDP 69 Closed SNTP* UDP 123 Closed SNMP UDP 161 Closed Syslog UDP 514 Closed RADIUS* UDP 1645 Closed RIP UDP 520 Closed Tunnel UDP Closed * client Table 3: Default service configuration Further Configuration For configuring additional services including SNMP, time synchronization (SNTP), Syslog and Spanning Tree please refer to the appendix in this document. Doc.-No.: 1KGT V

7 Connections and Settings Switch 560NMD11 Fig. 6: Web configuration Doc.-No.: 1KGT V

8 Connections and Settings Switch 560NMD11 Note: We reserve the right to make technical changes or modify the contents of this document without prior notice. With regard to purchase orders, the agreed particulars shall prevail. ABB AG does not accept any responsibility whatsoever for potential errors or possible lack of information in this document. We reserve all rights in this document and in the subject matter and illustrations contained therein. Any reproduction, disclosure to third parties or utilization of its contents - in whole or in parts is forbidden without prior written consent of ABB AG. Copyright 2013 ABB All rights reserved Appendix Doc.-No.: 1KGT V

9 Table of Contents General Information Important Notes Firmware Update Configuration of supported protocols IEC and Port Access Control (IEEE 802.1X) RADIUS SSH Secure Shell SNMP Spanning Tree and Rapid Spanning Tree Syslog Time Synchronization (SNTP) Additional functions Alarm signalling Quality of Service (QoS) RS232 Modes and Tunnelling Virtual Network (VLAN) Configuration Web Server Doc.-No.: 1KGT V

10 General Information Important Notes - Although some explanations and descriptions mention a dsl2 interface the device 560NMD11 does not supply a 2 nd dsl interface. For commands referencing a dsl2 interface this command does not apply. For a dsl-device with two SDSL interfaces refer to the unit 560NMS24. - Although some explanations and descriptions mention interfaces fo1 or fo2 the device 560NMD11 does not supply a 2 nd fibre optic interface. For commands referencing this interface this command does not apply. Doc.-No.: 1KGT V

11 Firmware Update Updating the firmware is done by downloading an appropriate image to the device. The procedure can be started via Telnet or local console as well as with the integrated webserver. However, an Ethernet connection to a TFTP server on which the image is stored must be set up in any case. During the firmware update the power supply must not be interrupted under any circumstances neither must a reset be triggered, since it might put the device into a non-operational state. Update via Command Line Interface (SSH, Telnet and local console) After connecting to the device follow the steps stated below. First step: Second step: Third step: Complete process: Enter <enable> and, after being prompted, the appropriate password. Enter <copy tftp flash> and, after being prompted, the IP address of the TFTP server, as well as the name of the image file. Restart the device with the command <reload>. switch>enable <enable> Enter Password: switch#copy tftp flash <copy tftp flash> Copy firmware from TFTP-Server to flash. Enter TFTP Server IP: Enter Filename: sr bin!!!!!!!!!!!!!!!!!!! Transmission complete [ bytes ok] Erasing flash... complete Programming image.!!!!!!!!!!!!!!!!!!! Firmware upgrade complete. Reboot to load the new firmware. switch#reload <reload> Reload initiated, please wait... Performing self-test: [...] After the restart the device loads the new software. Update via the integrated webserver Connect to the webserver by typing the devices IP-Address into any web browser. Logon with enable privilege and navigate to the Firmware-page. Follow the instruction on screen. Doc.-No.: 1KGT V

12 Configuration of supported protocols IEC and -104 For monitoring purposes the 560NMD11 is able to service a control station according to IEC as well as IEC Information Objects and Addressing The device supports the list of information objects stated in Table 4. Object / Function System Warning System Alarm Console0 RTS (Input) Console0 CTS (Output) Link state of interfaces OFF ON OFF ON OFF OFF ON OFF ON OFF ON State normal state warning state normal state alarm state open V 3 25 V -2,5-5 V 2,5 5 V max. 5 ma no link link Table 4: IEC Information objects Preconfigured object address beginning 128 The object address for the link state of the interfaces results from the available interfaces of the device and is sorted ascending starting at object address 128. For the device 560NMD02 or 560NMS24 for example the object address for interface dsl1 is 128, for dsl2 129 and for port1 of the integrated switch 130; For a device 560NMD01 or 560NMS34, 128 is the object address of the interface dsl1 and 129 the address of Port1 of the integrated switch (and so on). Table 5 lists the available interfaces for the different devices as well as their corresponding object addresses. Interface / Port 560NMS24 560NMD02 560NMS34 560NMD01 560NMD11 dsl dsl port port port port fo fo console console Table 5: Interfaces monitored by IEC x The IEC x station address (common address of ASDU), as well as the addresses of the information objects are configurable. The default setting for the station address is 0, the default setting for the addresses of the information objects can be taken from Table 4. Doc.-No.: 1KGT V

13 Interface and Access concept The implementation of IEC x supports multiple control centers. One can distinguish between independent (e.g. different companies) and dependant (e.g. redundant telecontrol heads) control centers. Each independent control center is provided an own set of information objects, while dependant control center share a set of information objects. The addresses (ASDU and information objects) don t need to be identical between independent control centers. If a counter value is reset by a control center in a configuration with independent control centers, the value for the seconds control center is not reset. Dependent and independent control centers don t exclude each other. A valid configuration may consist of two independent control centers each having a second dependent control center configured for redundancy. In the following example the control centers 1a und 1b are dependent as well as the control centers 2a und 2b. However the groups 1 and 2 are independent from each other. Control Center 1 Control Center 2 Output Counter Event 1a 1b 2a 2b 1 2 Read Read Read Read Reset Read Read Read Read Read Reset Read 0 Read Read Read Reset 100 Read Table 6: Operation with dependent and independent control centers Independent control centers are configured with so called interfaces. Every interface provides a set of information objects with distinct addresses and timing parameters. The interfaces are configured with the following command, where {n} denotes the interface number (or the control center group in the example above), which share information objects. The interface number starts at 1; the maximum number of configurable interfaces is soft- and hardware dependent. Configuration of the link parameters for IEC-101 control centers For access with IEC-101 (<set iec101 int >), several parameters must be set. These are: Link address <set iec101 interface {n} link address { }> Length address field in bytes <set iec101 interface {n} length link-address {0-2}> Number of retransmissions <set iec101 interface {n} link retries {0-10}> The IEC-101-interface must be bind to physical serial interface. For this purpose the command <set iec101 interface {n} attach {console0 console1} {balanced unbalanced}> is used, which attaches IEC-101 to the interface console0 or console1 in the operating mode balanced or unbalanced (party-line). The command <clear iec101 interface {n} attach {console0 console1}> removes the assignment. In parallel the physical interface must be configured to IEC-101 mode by the command: <set interface {console0 console1} mode iec101>. Configuration of IP addresses for IEC-104 control centers If no IP address is configured any control center with any IP address is allowed to connect to the device. If multiple interfaces are configured without IP addresses, the lowest interface number is chosen for connection. If one or more IP addresses are configured, only the control centers with the configured IP address are allowed to connect. The amount of configurable IP addresses is soft- and hardware dependent. The command <set iec104 interface {n} attach remote-ip {a.b.c.d}> can be used to set a control center IP address, <clear iec104 interface {n} attach remote-ip {a.b.c.d}> can be used to remove a control center IP address. Doc.-No.: 1KGT V

14 Configuration of timeouts <set {iec101 iec104} interface {n} timeout {t} {1-6000}> The value {t} denotes the number of the timeout counter. {t} = 1: Maximum time for waiting for an acknowledgement. The value (1-6000) is in seconds. {t} = 3: Inactivity counter to send a test frame (TestFR, IEC-104) or link test (IEC-101). The value (1-6000) is in seconds. Activating or deactivating an interface <set {iec101 iec104} interface {n} [no] shutdown> Configuration of the station address (common address of ASDU) <set {iec101 iec104} interface {n} station-address { }> The length of the ASDU address in bytes is set by the command <set {iec101 iec104} interface {n} length station-address {1 2}>. Configuration of object addresses The length of the object addresses in bytes is set by the command <set {iec101 iec104} interface {n} length object-address {1-3}>. Address for Warning/Alarm: <set {iec101 iec104} interface {n} object alarm address { }> The setting refers to a base address, which describes the object Warning, the by 1 incremented base address describes the object Alarm. Console0 RTS: <set {iec101 iec104} interface {n} object rts-in address { }> Console0 CTS: <set {iec101 iec104} interface {n} object cts-out address { }> Address of the link state of the interfaces: <set {iec101 iec104} interface {n} object linkstate address { }> The setting refers to a base address, which describes the link state of the first interface in the list of monitored interfaces (refer to Table 5). Every consecutive interface has a by 1 incremented address compared to the prior interface. Structured addressing If structured addressing is used, the structure can be configured with the command <set {iec101 iec104} interface {n} object structure {a-b-c}> Examples for {a-b-c} are 8-8-8, 8-16 or The values represent the numbers of bits of the addressing scheme. The sum of the bits must be equal to the available bits of the object address length (24 bits or 3 bytes in the example). After configuration of the structure, object addresses can be entered with the structured notation (e.g instead of 512 for a configured structure 8-8-8). Doc.-No.: 1KGT V

15 Authenticator Port Access Control (IEEE 802.1X) IP Netzwerk The IEEE 802.1X standard offers the possibility of network access control to physical interfaces of a LAN. A device called Supplicant Supplicant connected to the 560NMD11 switch Authentifizierungsserver which works as (RADIUS) Authenticator is granted network access only after successful authentication. The Authenticator does not manage the authentication itself, but uses a RADIUS-Server which has to be configured previously (refer to RADIUS on page 16). Authenticator IP Network Supplicant Authentication Server (RADIUS) Fig. 7: Port Access Control with IEEE 802.1X The configuration and reachability of a RADIUS-Server is mandatory for the functionality of 802.1X. <show dot1x> Displays on overview of the configuration and the states of 802.1X. <set dot1x [no] enable> Enabled or disables the global support IEEE 802.1X. The default state is active. <set dot1x portcontrol {fo1 fo2 port1 port2 port3 port4} {auth-force pae-auto unauth-force}> Sets the port control value for the corresponding port. auth-force pae-auto unauth-force the port is always authenticated (default). access to the network will be granted by 802.1X if the authentication using the RADIUS-Server succeeds. the port is never authenticated and therefore actually disabled. Doc.-No.: 1KGT V

16 RADIUS The 560NMD11 supports authentication of users not only by password, but also by an authentication server based on the RADIUS protocol. RADIUS can be used to integrate an existing user database (e.g. Active Directory) into the authentication process of the switch. To configure radius a radius server must be defined by the command below. <set system radius server {IP-Address} {shared secret}> The {IP-Address} is the IP address of the server (e.g. Microsoft Internet Authentication Server), the {shared secret} is the password to connect to the server. This password must also be set at the server for the device that will use the server for authentication. To remove a server use the following command <clear system radius server {IP-Address}>. After the server has been defined, radius must be bind to the login procedure. <set system loginmode password> / <set system loginmode radius> The first command defines that login shall be possible by password, the second command enables radius authentication for log in. RADIUS login doesn t affect an enable-password that might be set. After a login the user is read access mode for all console based protocols like SSH or Telnet. However, if radius is enabled, the web access mode will be read-write after login. RADIUS will never be applied to the serial console (RS232) access. Doc.-No.: 1KGT V

17 SSH Secure Shell The device supports the Secure Shell (SSH) Protocol version 2 and provides an alternate connection method for telnet. SSH is a secure protocol, it encrypts all data exchanged between a client and the device. SSH can be enabled by the command <set system ssh enable> or disabled by the command <set system ssh no enable>. By default SSH is enabled. SSH is a computationally intensive protocol. Therefore data is precalculated for every session/connection. This is done in the background for multiple possible sessions. A connection is only possible if at least one precalculation is completed. After booting the device there are in general four connections immediately possible. However, if a connection with SSH is currently not possible, this may be signaled by a warning or alarm. A warning (alarm LED blinking) can be enabled by the command <set system ssh warn-if-notready>. An alarm (alarm LED on and alarm relay active) can be enabled by the command <set system ssh alarm-if-notready> respectively. Both command can be disabled by adding the keyword no (<set system ssh no warn-ifnotready> bzw. <set system ssh no alarm-if-notready>). SSH requires a username and password at logon. If RADIUS is not configured the username is always edslogin and the password is the login password (refer to Security and Login on page 3). General information regarding the state of SSH can be viewed by <show system ssh>. Security Key / Host Key The SSH service works with 1024 Bit DSA Keys. Each delivered device contains a factory-installed unique key, however this key may be changed. For generating a new key the program PuTTYgen may be used. It is part of the open source terminal emulator suite PuTTY and can be obtain through the project homepage or directly by using the link ftp://ftp.chiark.greenend.org.uk/users/sgtatham/putty-latest/x86/puttygen.exe. The file is directly executable without installation. On startup of PuTTYgen a graphical interface is presented that is able to generate a new key. Fig. 8: PuTTY key generator key selection Doc.-No.: 1KGT V

18 The parameters of the key must be set to SSH-2 DSA with a key length of 1024 bits. (refer to Fig. 8). By using the button Generate and subsequently moving the mouse around the Key area, a key is generated. A progress bar gives a visual indication of the state. After a short time the key is generated as showed in Fig. 9 and may be saved now. The fields Key passphrase and Key comment must be left empty; Subsequent warnings shall be ignored. Fig. 9: PuTTY key generator key At next the key must be exported to the OpenSSH format, which can be done with the menu item Conversions. Use the sub item Export OpenSSH key to save the keyfile (refer to Fig. 10). Fig. 10: PuTTY key generator key export The file created must be transferred to the device. For this purpose a TFTP server is necessary which is capable to transmit the keyfile to the device. On the command prompt, reachable by a serial configuration cable or telnet, type the command <copy tftp cryptokey>. After entering the TFTP servers IP address and the name of the keyfile, the file is transferred to the device. After the procedure is completed it may take a few minutes until a connection can be established. Doc.-No.: 1KGT V

19 SNMP The device supports querying of values of SNMP (Simple Network Management Protocol) standard MIBs. SNMP parameters can be changed by the commands stated below. <set system snmp read-community {read-community}> Assigns the system a community-string (read-community) for SNMP. This string must be identical to the string assigned in the management station. In delivery state, the community-string is set to public. Multiple strings are allowed to be defined by entering the command multiple times with different communities. A community-string can be removed by the command <clear system snmp read-community {readcommunity}>. <set system snmp write-community {write-community}> Assigns the system a community-string (write-community) for SNMP. This string must be identical to the string assigned in the management station. In delivery state, the community-string is set to private. Multiple strings are allowed to be defined by entering the command multiple times with different communities. A community-string can be removed by the command <clear system snmp write-community {writecommunity}>. <set system snmp [no] enable [read-only]> Activates (<set system snmp enable>) or deactivates (<set system snmp no enable>) SNMP support. In delivery state SNMP is deactivated. Independently of any configured write community SNMP may be set to read-only (<set system snmp enable read-only>). If the command is applied write communities configured are only allowed to read values. <set system snmp trap-target {IP-Address}> Defines a target IP address for SNMP traps (usually Network Management Station). <clear system snmp trap-target {IP-Address}> Deletes a target IP address for SNMP traps. Doc.-No.: 1KGT V

20 Spanning Tree and Rapid Spanning Tree The device supports the Rapid Spanning Tree Protocol (RSTP) to avoid loops in switched networks (layer 2). This is completely backward compatible to the Spanning Tree Protocol (STP). With the command <set stp enable> the (Rapid) Spanning Tree Protocol is activated. It is deactivated accordingly with <set stp no enable>. In standard configuration, (R)STP is active. Toggling between RSTP and STP Toggling between RSTP (Rapid Spanning Tree Protocol) and STP (Spanning Tree Protocol) is done automatically. The devices are in RSTP mode after activation of the Spanning Tree Protocol. When a standard STP message is received the respective port switches back to STP mode. An automatic switching from STP to RSTP does not take place, however. Display of status Information The status of the (Rapid) Spanning Tree Protocol at the various interfaces can be checked with the following commands: <show stp bridge> Displays the port- and bridge-identifiers that are used by the (Rapid) Spanning Tree Protocol. <show stp details> Displays the configuration of the (Rapid) Spanning Tree Protocol, as well as the state of the interfaces. An interface forwards frames only in the forwarding state. Control of the (Rapid) Spanning Tree Processes The (Rapid) Spanning Tree Protocol can be influenced with the following commands. <set stp priority bridge {priority}> Changes the bridge priority. By altering this setting the position of the Root-Bridge can be influenced. Root- Bridge is defined as the bridge or switch with the least priority in the network. The standard value is If two bridges have the same priority, the bridge with the lower MAC address becomes Root-Bridge. <set stp priority [fo1 fo2 dsl1 dsl2 port1 port2 port3 port4] {priority}> Changes the priority for a designated interface. By altering the setting it is possible to favour a certain DSL hop for example. Smaller values get higher priority, the standard value is 128. <set stp [no] point-to-point [fo1 fo2 dsl1 dsl2 port1 port2 port3 port4]> When interfaces are not set to point-to-point operation, the convergence time in case of a change of topology can become severly worse. Point-to-point operation is by standard only set for the DSL interfaces. For the Ethernet interfaces, point-to-point is not activated and must be set manually with the command <set stp point-to-point fastethernet0>. When more than one Rapid Spanning Tree or Spanning Tree capable switch is connected to the Ethernet interface, the point-to-point mode is not allowed to be activated. Point-to-point operation can be prohibited with the command <set stp no point-to-point [fo1 fo2 dsl1 dsl2 port1 port2 port3 port4]>. Doc.-No.: 1KGT V

21 <set stp [no] edge [fo1 fo2 dsl1 dsl2 port1 port2 port3 port4]> If it is ensured that only end stations are connected to an interface (no loops can occur), this interface can immediately forward frames. This so-called Edge-Port can be configured with the command <set stp edge [fastethernet0 dsl1 dsl2]>. With <set stp no edge [fo1 fo2 dsl1 dsl2 port1 port2 port3 port4]> the interface is restored to the normal Spanning Tree mode. When a Spanning Tree frame (BPDU) is received on an edge port, the interface changes immediately to the normal Spanning Tree mode. The state can be checked in the Spanning Tree detail view entering <show stp detail> or <show stp>. Doc.-No.: 1KGT V

22 Syslog The device can send information messages (e.g. changes of the state of an interface, user logins or command executions) to Syslog servers within the network. A timestamp is generated for every message, which consists of the system time in case of a successful synchronization with a time server ((S)NTP server). However, if the device is not synchronized, the current system uptime is used as a timestamp. Furthermore, the device may operate as Syslog relay server. In this additional mode, all received Syslog messages are relayed to the Syslog servers entered. Syslog is controlled by the commands below. <set system syslog server {IP Address} {Severity}> Defines the address of the Syslog server and activates message forwarding. Severity is a value between 0 and 7 and describes the kind of messages being sent. In this context, a given severity includes all lower values. Therefore, when severity is 7 all messages are sent, when severity is 0 only system critical messages are sent. A detailed but incomplete assignment is given in the following table. Severity Description Messages 0 Emergency 1 Alarm - Temperature warning 2 Critical - Reboot - Status change of an interface (up/down) 3 Error 4 Warning - Wrong Login password entered - Wrong Enable password entered 5 Note 6 Information - User login - System was put into enable mode - Firmware update performed 7 Debug - Command execution Table 7: Syslogevents <clear system syslog server {IP Address}> Deletes the address of the Syslog server and deactivates transmission of messages to this server. <set system syslog relay> Activates the forwarding of received Syslog messages. Doc.-No.: 1KGT V

23 <set system syslog no relay> Deactivates forwarding of Syslog messages. This is the standard setting. <set system syslog strictrfcmode> If a timestamp is not detected in the process of forwarding (relay) of Syslog messages in the received message, the device adds a timestamp as well as its own host name to the message. This complies with the standard according to RFC <set system syslog no strictrfcmode> If a timestamp is not detected in the process of forwarding (relay) of Syslog messages in the received message, the device adds a timestamp in case it is synchronized with a NTP server. A host name is never inserted. This is the standard setting. <debug system syslog testmessage> Transmits a Syslog test message to all listed servers. <debug system syslog testmessage {IP-Address}> Transmits a Syslog test message to the specific IP address. <show system syslog> Displays an overview about the current configuration of Syslog. Doc.-No.: 1KGT V

24 Time Synchronization (SNTP) The NMS supports setting of time and date by means of a time server based on (S)NTP ((Simple) Network Time Protocol). This time information is used in Syslog messages and in the internal log (command <show log>). The current time when synchronization was successful is also displayed in the system overview (command <show system>). There is no transition to winter- or summer-time. The time displayed is always winter-time. Time synchronization with the server takes place every 24 hours. <set system sntp server {IP Address}> Defines the address of the time server and activates synchronization. When the time server is not available, a synchronization attempt takes place every minute. <clear system sntp server> Deletes the time server address and deactivates synchronization. <set system sntp timezone {cet gmt }> Defines the time zone in which the NMS is located. The standard value is CET. For a complete list of timezones type <set system sntp timezone?>. <show system sntp> Displays status information about time synchronization. <set system sntp sync> Triggers immediate synchronization attempt with server. Doc.-No.: 1KGT V

25 Additional functions Alarm signalling The device supports a variety of possible alarms. One may distinguish between Events, which are send by syslog (if configured, refer to chapter Syslog) and Alarms and Warnings which are additionally stored in the device. The following classes apply: Class Syslog Alarm LED Alarm relay Event Yes Off Normal Warning Yes Blinking Normal Alarm Yes On Alarm The Warnings and Alarms below exist, Events are not listed due to their great variety. Description Class Meaning and configuration Speed mismatch Warning Interface and remote station use different speed settings. Is detected by LLDP (IEEE 802.1ab) for Ethernet interfaces, for DSL interfaces proprietary. Not configurable. Duplex mismatch Warning Interface and remote station use different duplex settings. Is detected by LLDP (IEEE 802.1ab) for Ethernet interfaces, for DSL this doesn t apply since it is always full duplex. Not configurable. SSH not ready Warning / Alarm Signal quality low Warning / Alarm No SSH connection possible, no key available at this time. Warning: Activation and Deactivation by <set system ssh [no] warnif-not-ready>. Alarm: Activation and Deactivation by <set system ssh [no] alarm-if-not-ready>. Signal quality has reached threshold. There are separate signal quality values configurable for Warning and Alarm for DSL and fibre optic interfaces with managed SFPs. Warning: <set interface dsl1 dsl2 {threshold} alarm> for DSL <set switch fo1 fo2 {threshold} alarm> for fibre optic Alarm: <set interface dsl1 dsl2 {threshold} warning> for DSL <set switch fo1 fo2 {threshold} warning> for fibre optic If the Warning or Alarm shall be deactivated, use the keyword no for {threshold}, in any other case the threshold must be given in format x.y in db (e.g. 3.0 ). System boot Alarm The system is not ready. Not configurable. Overtemperature Alarm The system has reached a critical operating temperature. The threshold is configurable by <set system overtemp-warning {40-125}>. The range of 40 to 125 is in degrees Celsius. The Alarm activated by reaching the threshold and deactivated if the current measured temperature is below the threshold minus a hysteresis of 5 C. The default threshold value is 70 C. Aggregation mismatch Alarm Interface and remote station use different settings for port aggregation. Is detected by LLDP (IEEE 802.1ab). Not configurable. Doc.-No.: 1KGT V

26 Link up Alarm A link is established at this interface. Can be activated by <set switch {port1-4} {fo1-2} alarm-if-up> respectively <set interface dsl1 dsl2 alarm-if-up>. Can be deactivated by <set switch {port1-4} {fo1-2} no alarm-if-up> respectively <set interface dsl1 dsl2 no alarm-if-up>. The default is deactivated. Link down Alarm A link is not established at this interface. Can be activated by <set switch {port1-4} {fo1-2} alarm-if-down> respectively <set interface dsl1 dsl2 alarm-if-down>. Can be deactivated by <set switch {port1-4} {fo1-2} no alarm-if-down> respectively <set interface dsl1 dsl2 no alarm-if-down>. The default is deactivated. Ethernet Remote Fault Alarm The remote device reported an error. Viewing Warnings and Alarms The potential Alarms and Warnings that may become active, may be displayed with the command <show alarm enabled>. The output list is ordered by instances (mostly interfaces, example refer to Fig. 11). switch#sh al enabled <show alarm enabled> Enabled alarms: Instance Alarm Severity dsl1 Speed mismatch Warning Link aggregation mismatch Alarm Signal quality warn threshold reached Warning Signal quality alarm threshold reached Alarm dsl2 Speed mismatch Warning Link aggregation mismatch Alarm Signal quality warn threshold reached Warning Signal quality alarm threshold reached Alarm system Overtemperature Alarm System booting Alarm Fig. 11: Potential Warnings and Alarms Alarms or Warnings currently active can be displayed by <show alarm> or <show alarm active>. Doc.-No.: 1KGT V

27 Quality of Service (QoS) The switch implements a 4-way weighted queue for traffic priorization. This queue works with an scheme, meaning that the high priority queue is serviced eight times more often than the low priority queue. The priority of an incoming frame may be determined by its class-of-service (cos) or diffserv (ds) value. The 3-bit values of the priority fields are mapped to the queues as stated in the table below. Cos/ds Queue Priority Lowest Priority (serviced 1 time per slice) Low Priority (serviced 2 times per slice) Medium Priority (serviced 4 times per slice) High Priority (serviced 8 times per slice) Table 8: Quality-of-service priorities The value being trusted on incoming frames can be modified by the command <set switch {port1 port2 port3 port4 fo1 fo2} trust cos ds cos-ds ds-cos none>. One may choose if to trust cos or ds, or if both are present which has the priority for classification (e.g. if ds-cos if chosen, all frames will be classified by its diffserv field; If no diffserv field exists, the cos value is trusted). The default is cos. If a vlan access port configuration is present, a specific priority value can be set for incoming frames (e.g. give high priority to an RTU port and low priority to any other). The priority is preserved through trunks in the vlan tag and will be carried over multiple switches as long as the tag is present. The tag will be removed only at the final destination access port. The command for applying a priority to all frames of a port is <set switch {port1 port2 port3 port4 fo1 fo2} cos {0-7}>. The default is zero. Doc.-No.: 1KGT V

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