Allied Telesis AT-8000S manual Configuring Sntp, Polling for Unicast Time Information

Page 24

Configuring System Time

Configuring SNTP

Configuring SNTP

The device supports the Simple Network Time Protocol (SNTP). SNTP assures accurate network device clock time synchronization up to the millisecond. Time synchronization is performed by a network SNTP server. The device operates only as an SNTP client, and cannot provide time services to other systems. The device can poll the following server types for the server time:

•Unicast

•Anycast

•Broadcast

Time sources are established by stratums. Stratums define the accuracy of the reference clock. The higher the stratum (where zero is the highest), the more accurate the clock. The device receives time from stratum 1 and above. The following is an example of stratums:

Stratum 0 — A real time clock (such as a GPS system) is used as the time source.

Stratum 1 — A server that is directly linked to a Stratum 0 time source is used. Stratum 1 time servers provide primary network time standards.

Stratum 2 — The time source is distanced from the Stratum 1 server over a network path. For example, a Stratum 2 server receives the time over a network link, via NTP, from a Stratum 1 server.

Polling for Unicast Time Information

Polling for Unicast information is used for polling a server for which the IP address is known. T1 - T4 are used to determine the server time. This is the preferred method for synchronizing device time.

Polling for Anycast Time Information

Polling for Anycast information is used when the SNTP server IP address is unknown. The first Anycast server to return a response is used to set the time value. Time levels T3 and T4 are used to determine the server time. Using Anycast time information for synchronizing device time is preferred to using Broadcast time information.

Broadcast Time Information

Broadcast information is used when the server IP address is unknown. When a broadcast message is sent from an SNTP server, the SNTP client listens for the response. The SNTP client neither sends time information requests nor receives responses from the Broadcast server.

Message Digest 5 (MD5) Authentication safeguards device synchronization paths to SNTP servers. MD5 is an algorithm that produces a 128-bit hash. MD5 is a variation of MD4, and increases MD4 security. MD5 verifies the integrity of the communication, authenticates the origin of the communication.

To define SNTP global parameters:

1.Click System > System Time. The System Time Page opens.

The SNTP Settings section of the System Time Page contains the following fields:

•Status — Indicates if SNTP is enabled on the device. The possible field values are:

–Disabled — Indicates that SNTP is disabled.

–Enabled — Indicates that SNTP is enabled.

•Server IP Address — Displays a user-defined SNTP server IP address.

•Poll Interval — Defines the interval (in seconds) at which the SNTP server is polled for Unicast information. The Poll Interval default is 1024 seconds.

2.Select the SNTP Status.

Page 23

Page 23 Page 25
Image 24
Page 23 Page 25
Contents Layer Ethernet Switch AT-8000S SeriesTable of Contents Configuring Ports Configuring Power Over Ethernet 126 176 Table of Contents Preface Web Browser Interface User’s GuideWeb Browser Interface User’s Guide Overview Intended AudienceWeb Browser Interface User’s Guide Overview Document Conventions Contacting Allied TelesisOnline Support Contacting Allied Telesis Click Login. The Embedded Web System Home Page opens Getting StartedStarting the Application Click Configuration. The System General Page opens Starting the ApplicationUsing the Web Browser Interface Click Layer 1 Port Settings. The Port Settings Page opensViewing the Device Representation Using the Web Browser Interface User Interface ComponentsInterface Components Component DescriptionUsing the Management Buttons Configuration Management ButtonsButton Button Name Description Adding, Modifying and Deleting Information Add Local UserSaving Configurations Logging OutResetting the Device Resetting the DeviceDefining System Information Click System General. The System General Page opensDefining System Information Configuring System Time Configuring System Time Setting the System Clock Click System System Time. The System Time Page opensConfiguring Sntp Configuring SntpPolling for Unicast Time Information Polling for Anycast Time InformationConfiguring Daylight Saving Time Define the Server IP Address and the Poll Interval fieldsConfiguring Daylight Saving Time Configuring Device Security Configuring Management Security Configuring Management SecurityDefining Access Profiles HttpAdd Access Profile Click Add. The Add Access Profile Page opensAllied Telesis AT-8000S Switch Defining Profile Rules Profile RulesAdd Profile Rule Click Add. The Add Profile Rule Page opensProfiles Rules Configuration Click Modify. The Profiles Rules Configuration Page opensDefining Authentication Profiles Authentication ProfilesClick Add. The Add Authentication Profile Page opens Add Authentication Profile Enter the Profile NameMapping Authentication Profiles Authentication MappingConfiguring Server Based Authentication Configuring TACACS+Define the Console, Telnet, and Secure Telnet SSH fields TACACS+ Configuration Add TACACS+ Configuring Radius Radius ConfigurationAdd Radius Configuring Local Users Click Mgmt. Security Local Users. The Local Users Page opensClick Modify. The Local User Configuration Page opens Click Create. The Add Local User Page opensConfiguring Network Security Configuring Network SecurityNetwork Security Overview Managing Port SecurityClick Modify. The Port Security Configuration Page opens Port SecurityPort Security Configuration Defining 802.1x Port Access 802.1x Port AccessClick Enable Port Access Select the Authentication MethodClick Settings. The Port Authentication Settings Page opens Configuring Device Security Click Modify. The Storm Control Configuration Page opens Enabling Storm ControlStorm Control Configuration Configuring Ports Defining Port Settings Defining Port SettingsClick Modify. The Modify Port Settings Page opens Modify Port Settings Configuring Ports Allied Telesis AT-8000S Switch Configuring Port Mirroring Configuring Port MirroringClick Layer 1 Port Mirroring. The Port Mirroring Page opens Click Enable Mirror Click Modify. The Modify Mirror Page opensTo modify or delete a port mirror Aggregating Ports Defining Trunk Settings Click Layer 1 Port Trunking. The Trunk Settings Page opensAggregating Ports Trunk Configuration Settings Click Modify. The Trunk Settings Page opensConfiguring Ports Allied Telesis AT-8000S Switch Defining Port Trunking Port TrunkingModify Trunk Configuring Lacp Click Modify. the Modify Lacp Settings Page opensConfiguring Interfaces Defining MAC Addresses Defining MAC AddressesClick Layer 2 MAC Address. The MAC Address Page opens Add MAC Address Click Add. The Add MAC Address Page opensView MAC Address Table Click Close. The View MAC Address Table Page is displayedConfiguring VLANs Configuring VLANs Defining Vlan PropertiesAllied Telesis AT-8000S Switch Defining Vlan Interface Settings Click Layer 2 Vlan Interface. The Vlan Interface Page opensModify Interface Configuration Click Modify. The Modify Interface Configuration Page opensConfiguring Gvrp Defining GvrpSelect Enable Gvrp Click Modify. The Gvrp Port Configuration Page opensEnabling/Disabling Gvrp on a Port Define the Gvrp State and Gvrp Registration fieldsConfiguring System Logs Defining Log Settings Defining Log SettingsSystem Log Severity Levels Description Message Event Log Configuring Log Servers Clearing Event LogsClearing Event Logs Click Create. The Add Syslog Server Page opensSetting System Log Display Click Modify. The Modify Event Log Output Page opensViewing Flash Logs Viewing Flash LogsConfiguring Spanning Tree Configuring Classic Spanning Tree Configuring Classic Spanning TreeDefining STP Properties Complete the Spanning Tree State and Bridge Settings fields Click Configure. The STP Interface Configuration Page opens Defining STP InterfacesClick Layer 2 Spanning Tree. The Spanning Tree Page opens Allied Telesis AT-8000S Switch STP Modify Interface Configuration Configuring Rapid Spanning Tree RstpConfiguring Rapid Spanning Tree Modify RstpConfiguring Multiple Spanning Tree Configuring Multiple Spanning Tree Defining Mstp PropertiesDefine the Region Name, Revision, and Max Hops fields Mstp Interface Settings Defining Mstp InterfacesConfiguring Spanning Tree Mstp Instance Settings Defining Mstp InstancesConfiguring Spanning Tree Configuring Multicast Forwarding Configuring Igmp Snooping Configuring Igmp SnoopingIgmp Snooping Settings Click Modify. The Igmp Snooping Settings Page opensDefining Multicast Bridging Groups Defining Multicast Bridging GroupsCheck the Enable Bridge Multicast Filtering checkbox Click Create. The Add Multicast Group Page opensClick Modify. The Modify Multicast Group Page opens Defining Multicast Forward All Settings Defining Multicast Forward All SettingsModify Multicast Forward All Click Modify. The Modify Multicast Forward All Page opensConfiguring Multicast Forwarding Configuring Snmp Snmp Overview Snmp OverviewEnabling Snmp Snmp GlobalEnabling Snmp Defining Snmp Communities Snmp Communities Basic TableClick Modify. The Snmp Community Settings Page opens Defining Snmp CommunitiesDefining Snmp Groups Snmp GroupDefining Snmp Groups Click Create. The Create Snmp Group Profile Page opensClick Modify. The Modify Snmp Group Profile Page opens Defining Snmp Users Snmp UsersClick Modify. The Snmp User Settings Page opens Defining Snmp UsersDefining Snmp Views Click Create. The Add Snmp VIew Page opensAdd Snmp VIew Defining Snmp ViewsConfiguring Snmp Notifications Defining Notification RecipientsConfiguring Snmp Notifications SNMPv1,2c Notification RecipientDefining Notification Filters Create Snmp Notification RecipientSnmp Notification Filter Settings Configuring Power Over Ethernet Enabling PoE and Setting the Power Threshold Enabling PoE and Setting the Power ThresholdDefining PoE Settings Defining PoE Settings Modify PoEModify the Admin Mode and Priority Level fields Configuring Power Over Ethernet Configuring Services Enabling Class of Service CoS Enabling Class of Service CoSCoS Configuration Click Modify. The CoS Configuration Page opensConfiguring CoS Priorities Configuring CoS PrioritiesSelect the Configure CoS Priority to Egress Queues values Click Configure CoSClick Configure. The Configure CoS Page opens Mapping QueuesSelect the Configure Dscp Priority values Click Configure DscpClick Configure. The Configure Dscp Page opens Mapping Dscp Values to QueuesConfiguring Bandwidth QoS Click Services Bandwidth. The Bandwidth Page opensConfiguring Bandwidth QoS Click Modify. The Bandwidth Configuration Page opensManaging System Files Restoring the Default Configuration Restoring the Default ConfigurationClick Apply in the Reset to Factory Defaults section Check the Reboot Switch After Resetting to Defaults optionDefining Tftp File Uploads and Downloads Click Utilities File System The File System Page opensDefining Tftp File Uploads and Downloads Select the Source and the Destination Unit Viewing Integrated Cable Tests Viewing Integrated Cable TestsClick Utilities Cable Test. The Cable Test Page opens Copper Cables Extended Feature Viewing Optical Transceivers Viewing Optical TransceiversReset Select the Reset Unit NoResetting the Device Viewing Statistics Viewing Interface Statistics Viewing Interface StatisticsViewing Interface Statistics Receive Statistics Viewing Etherlike Statistics Etherlike StatisticsOpen the Etherlike Statistics Managing Rmon Statistics Viewing Rmon StatisticsManaging Rmon Statistics Allied Telesis AT-8000S Switch Configuring Rmon History Click Statistics Rmon History. The Rmon History Page opensClick Rmon History. The Create History Entry Page opens Click Modify. The History Control Settings Page opens Create History EntryViewing the Rmon History Table Click View. The Rmon History Table Page opensAllied Telesis AT-8000S Switch Configuring Rmon Events Click Statistics Rmon Events. The Rmon Events Page opensClick Modify. The Event Control Settings Page opens Click Create. The Create Event Entry Page opensDefine the Community, Description, Type and Owner fields Viewing the Rmon Events Logs Click View. The Rmon Events Logs Page opensDefining Rmon Alarms Rmon AlarmAdd Alarm Rmon Alarm Settings Click Modify. The Rmon Alarm Settings Page opensViewing Statistics Managing Stacking Stacking Overview Stacking Ring TopologyStacking Chain Topology Stacking OverviewStacking Members and Unit ID Removing and Replacing Stacking MembersExchanging Stacking Members Configuring Stacking Management Enhanced StackingConfiguring Stacking Management Connecting a Terminal Initial ConfigurationAppendix A. Downloading Software with CLI Configuration Initial ConfigurationStatic IP Address and Subnet Mask System software file file1 Boot file file Downloading SoftwareUser Name Standalone Device Software DownloadStacking Member Software Download Downloading SoftwareAllied Telesis AT-8000S Switch Console# copy unit//1/image unit//4/image Appendix B. System Defaults RS-232 Port Settings Port DefaultsConfiguration Defaults Security DefaultsSystem Time Defaults Spanning Tree DefaultsAddress Table Defaults Vlan Default Trunking DefaultsMulticast Defaults Vlan DefaultSymbols IndexAccess profiles Sntp
Related manuals
Manual 48 pages 34.24 Kb

AT-8000S specifications

The Allied Telesis AT-8000S series switches are a range of advanced Layer 2 Ethernet switches designed for efficient networking in various environments. Engineered with performance, reliability, and cost-effectiveness in mind, these switches are ideal for businesses seeking to enhance their network infrastructure.

One of the main features of the AT-8000S series is its high-speed data forwarding capabilities. With support for 10/100/1000 Mbps Ethernet ports, these switches provide fast and reliable connections, enabling seamless data transfer and enhanced communication between devices. The non-blocking switching architecture ensures that full bandwidth is available at all times, maximizing throughput and reducing latency in network traffic.

The AT-8000S series incorporates advanced Layer 2 switching technologies, such as VLAN support, allowing users to segment network traffic for improved performance and security. Virtual Local Area Networks (VLANs) help isolate sensitive data and reduce unnecessary broadcast traffic, enhancing the overall performance of the network.

Quality of Service (QoS) is another significant feature integrated into these switches, prioritizing different classes of network traffic. This functionality ensures that critical applications receive the necessary bandwidth and minimal latency, which is imperative for voice over IP, video conferencing, and other latency-sensitive applications.

In terms of network management, the AT-8000S series provides a variety of options, including an intuitive web-based interface, SNMP support, and the ability to manage switch configurations through console access. This flexibility allows network administrators to monitor performance and manage configurations easily.

The switches are built for durability, featuring a robust design suitable for deployment in various environments, including temperature-sensitive areas. Power over Ethernet (PoE) capability is also available in certain models, allowing network devices like IP cameras and wireless access points to receive power through the same cable as data, simplifying installation and reducing clutter.

Allied Telesis emphasizes security within the AT-8000S series, with features such as port security, DHCP snooping, and IEEE 802.1X authentication to safeguard against unauthorized access and potential threats.

Overall, the Allied Telesis AT-8000S series provides a comprehensive networking solution tailored for modern business needs, combining performance, flexibility, and security to support a growing array of applications and devices within the network.
Top Page Image Contents