Following conventions established by the telephone industry [BEL86], the accuracy of each server is defined by a number called the
stratum, with the topmost level (primary servers) assigned as one and each level downwards (secondary servers) in the hierarchy assigned
as one greater than the preceding level.
Dell Networking OS synchronizes with a time-serving host to get the correct time. You can set Dell Networking OS to poll specific NTP
time-serving hosts for the current time. From those time-serving hosts, the system chooses one NTP host with which to synchronize and
serve as a client to the NTP host. As soon as a host-client relationship is established, the networking device propagates the time
information throughout its local network.
Protocol Overview
The NTP messages to one or more servers and processes the replies as received. The server interchanges addresses and ports, fills in or
overwrites certain fields in the message, recalculates the checksum, and returns it immediately.
Information included in the NTP message allows each client/server peer to determine the timekeeping characteristics of its other peers,
including the expected accuracies of their clocks. Using this information, each peer is able to select the best time from possibly several
other clocks, update the local clock, and estimate its accuracy.
Figure 130. NTP Fields
Implementation Information
Dell Networking systems can only be an NTP client.
Configure the Network Time Protocol
Configuring NTP is a one-step process.
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System Time and Date
Summary of Contents for S4048T-ON
Page 1: ...Dell Configuration Guide for the S4048 ON System 9 11 2 1 ...
Page 148: ...Figure 10 BFD Three Way Handshake State Changes 148 Bidirectional Forwarding Detection BFD ...
Page 251: ...Dell Control Plane Policing CoPP 251 ...
Page 363: ... RPM Synchronization GARP VLAN Registration Protocol GVRP 363 ...
Page 511: ...Figure 64 Inspecting the LAG Configuration Link Aggregation Control Protocol LACP 511 ...
Page 558: ...Figure 84 Configuring Interfaces for MSDP 558 Multicast Source Discovery Protocol MSDP ...
Page 559: ...Figure 85 Configuring OSPF and BGP for MSDP Multicast Source Discovery Protocol MSDP 559 ...
Page 564: ...Figure 88 MSDP Default Peer Scenario 2 564 Multicast Source Discovery Protocol MSDP ...
Page 565: ...Figure 89 MSDP Default Peer Scenario 3 Multicast Source Discovery Protocol MSDP 565 ...
Page 841: ...Figure 115 Single and Double Tag TPID Match Service Provider Bridging 841 ...
Page 842: ...Figure 116 Single and Double Tag First byte TPID Match 842 Service Provider Bridging ...