Perle Systems 1700 manual Simple Network Time Protocol Sntp, ªenable

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Applications

Simple Network Time Protocol (SNTP)

The Simple Network Time Protocol (SNTP) feature on the Perle Routers support the client side of the protocol as described in RFC 2030. The router will be able to obtain its time from a NTP or SNTP server and then can be synchronized amongst other network devices. Additionally, the router can also be configured to support various time variations features such as local time zone and adjustments for daylight savings time.

When the Perle router has SNTP enabled it will periodically send NTP packets to the NTP/SNTP server which will respond with the network time. The router will synchronize its internal clock with the response from the NTP/SNTP server. The method in which the router sends or receives the NTP packets from the NTP/SNTP server is configurable in three modes: unicast, multicast and anycast.

In unicast mode, the router will have to be configured with the IP Address of the NTP server and will periodically send a request packet to the NTP server. The NTP server will then respond directly to this request with the current time. The Perle router supports a primary and a secondary IP Address for NTP servers.

In multicast mode, the router does not initiate the request packets but waits to receive the periodic broadcasts from the NTP server with the current time. Once the router receives an NTP packet from the server, it will then synchronize its internal clock with the current time.

In anycast mode, the router will send out a request packet as a broadcast on the LAN to get a response from any NTP server. When the first response is received from an NTP server, the internal clock of the router is synchronized. The router will learn the IP Address of the NTP server that responded and then operate in unicast mode.

The Perle router supports time variation feature of local time zones and daylight savings time regardless if the internal clock is synchronized with an NTP server. The local time zone feature allows the router to offset the internal clock by a configurable time from the UTC time. The configurable time zone off set can be specified in hours (0 to 23) and minutes (0 to 59) and can also be specified by a specific name up to 4 characters.

Adjustments to the internal clock for daylight saving time (Summer-time) can be enabled and specified for one time within the year or recurring year after year. Configuration parameters allow the router to enable Summer-time each year by specifying the month, week, day and hour for the begin and end Summer-time.

To enable SNTP on the router and setup for unicast mode to directly obtain the time from a specific NTP server implement the following steps.

Location:

ªConfiguration ªApplication Set-up

ªSNTP Set-up ªSNTP Client

ªenable

ªMode ªunicast

ªPrimary IP Address

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Contents Bridge / Routers User And System Administration Guide Federal Communications Commission FCC Using This Manual Contents Introduction to Filtering Appendix D Interface Pinouts Select a Site Unpack the RouterLocation of the Reset Hole on Router Identify the Reset SwitchIdentify the Connectors P1705P1730 Make the Link Connections Connect to the ConsoleManaging the P1705 & P1730 Using the Menus Power Up the Bridge/RouterOption Name ConventionsPassword Login to Bridge/Router and Enter the Required Configuration56/64 kbps T1 or E1First channel As specifedNumber of channels ReservedIsdn U Isdn S/T PPP Isdn Mandatory ConfigurationOff Identify the Status LEDsTypical Applications & How to Configure Them Bridging and Routing Should You Bridge or Route? Networks Bridged across a WAN link BridgingIP Address / Size of Subnet Mask IP RoutingIP Addressing IP Subnets MasksDefining an IP Subnet Mask IP Static Route IP Default GatewayNovell Servers in Both Locations IPX RoutingIPX Routed Local Area Networks Servers on one side Novell Servers in One Location OnlyEthernet-II Frames IPX RoutingRAW 802.3 Frames Ieee 802.2 FramesNovell Server with Dual LANs IPX ForwardingSelect LAN1 or LAN2 PPP Overview PPP Link ConfigurationNumbered Links Link IP addressPeer IP address Unnumbered LinksMultilink Operation Basic Isdn Connections Basic WAN ConfigurationsSwitch Type Directory NumberSpid Console after a full reset Soft ResetPPP Isdn Manual Call Quick Connections IP Address / Subnet mask size Manual CallFrame Relay configuration Basic Frame Relay ConfigurationLink Speed Auto Learning the Frame Relay ConfigurationLMI Type Manual Configuration LMI TypePPP Enabled Quick Start Frame RelayIP Address / mask size Quick Start PPP Leased Line Connections Basic Leased Line ConfigurationBridge Connection Configure Remote Site Profiles Isdn Number Configure Remote Site Profiles for Isdn PPPEnabled ªConfiguration WAN Set up Remote Site Set-up Configure Remote Site Profile for Frame RelayRemote Site Alias DlciCIR Primary LinkEIR DisabledConfigure Remote Site Profiles for Leased Line PPP Site profile Schedule RecoveryConfigure Remote Site Profiles for PPPoE ªenabledLAN ªTCP mss value ª1452 ªPPPoE remote site alias ªISP provided usernameConfigure Dynamic Host Configuration Protocol Advanced FeaturesªServer ªIP Address / number of addressesIP address external DNS server IP address local DNS serverNetwork Address Translation and Port Translation Enter the private network IP address of each service offered11 Napt Configuration Configure PPP Security SecuritySecurity Level Incoming PAP Password Outgoing PAP PasswordIncoming Chap Secret Outgoing Chap Secret 13 Sample Firewall Application Configure FirewallInbound Enter ID# 1 for ISP remote siteID# 1 for ISP remote site FTP ServerDestination Mask Filter ID # Destination AddressSource Address Source MaskCompression Network Address TranslationFilters Bandwidth On Demand EnableLocation Main QOS Priority QueuingªPriority ªPriority List Number Simple Network Time Protocol Sntp ªenableªTime ªIP AddressMAC Address Filtering Introduction to FilteringNot Pattern FilteringPopular Filters NetBIOS &NetBEUI Windows For WorkgroupsBridge IP & Related TrafficIP Router NetBIOS over TCPBanyan Other interesting TCP PortsAppendix a Menu Trees Menu Tree Menu Tree Octet Locations on a Bridged TCP/IP Frame Appendix B Octet Locations on Ethernet FramesConfiguration Pages Octet Locations Octet Locations on a Bridged XNS Frame Opening the case Appendix C Servicing InformationIdentifying the Internal Components To Clear a Lost Password Changing LAN or WAN InterfacesSelecting MDI or MDI-X LAN Interface Processor settings for the Isdn Link Modules Installing the Isdn Link ModulesChanging the Termination Straps on the Isdn S/T Interface Connecting to the ISDN-U Link ModulePerforming a Software Upgrade PC used for Tftp transfers Router a Router B Router C Pinout Information Link Clocking InformationATL-CSU/DSU Link Module Information Switches DB25 Female DCE Console PinoutsDB25 Female DTE 24 & RS232C Link PinoutsDB15 Female DTE 11/X.21 Link PinoutsDB25 Female DTE RS442 & RS530 Link PinoutsDCE Link PinoutsFigure D-9 RS232 Null-Modem Cable RS232 Null-Modem Cable ConfigurationFigure D 10 V-35 Null-Modem Cable Null-Modem Cable ConfigurationFigure D-11 RS530 Null-Modem Cable RS530 Null-Modem Cable ConfigurationFigure D-12 RS530 to RS449 Conversion Cable RS530 To RS449 Conversion CableFigure D-13 V.11/X.21 Null-Modem Cable 11/X.21 Null-Modem Cable Configuration