Clock Commands
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64
Clock Commands
Real-time Clock
The PowerConnect supports a real-time clock that maintains the system time
across reboots. The system time is used to timestamp messages in the logging
subsystem as well as for the application of time based ACLs. The
administrator has the ability to configure and view the current time, time
zone, and summer time settings.
The earliest date that can be configured is Jan 1, 2010.
Simple Network Time Protocol
The Simple Network Time Protocol (SNTP) is widely used for synchronizing
network resources. SNTP Version 4 is described in RFC 2030. SNTP is an
adaptation of the Network Time Protocol (RFC 1305) useful for situations
where the full performance of NTP is not justified. SNTP can operate in
unicast mode (point-to-point) or broadcast mode (point-to-multipoint).
Various NTP implementations can operate as either a client or a server. To an
NTP or SNTP server, NTP and SNTP clients are indistinguishable. Likewise,
to an NTP or SNTP client, NTP and SNTP servers are indistinguishable.
Furthermore, any version of NTP is compatible with any other version of NTP.
PowerConnect SNTP implements the client side of SNTP.
Support for IPv6 address configuration is provided to the existing SNTP
client. The end user can configure either an IPv4 or IPv6 address or a host
name for an SNTP server among the list of servers. In unicast mode, one of
the servers from the list is selected as the active server to be used for polling
based on priority and configured order. The servers are treated alike
independent of IPv4 or IPv6 or hostname address formats.At any given point
of time, the client operates in unicast or broadcast mode.In broadcast mode,
SNTP client listens for server packets from IPv4 and IPv6 networks at the
same time on port number 123.On IPv6 networks, the SNTP client listens to
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Summary of Contents for PowerEdge M420
Page 161: ...Command Groups 161 ...
Page 162: ...162 Command Groups ...
Page 216: ...216 Layer 2 Commands ...
Page 290: ...290 Auto VoIP Commands ...
Page 310: ...310 Data Center Bridging Commands ...
Page 316: ...316 DHCP Layer 2 Relay Commands Example console config dhcp l2relay vlan 10 340 345 ...
Page 324: ...324 DHCP Management Interface Commands ...
Page 340: ...340 DHCP Snooping Commands ...
Page 354: ...354 Dynamic ARP Inspection Commands ...
Page 405: ...Ethernet Configuration Commands 405 Name test ...
Page 406: ...406 Ethernet Configuration Commands ...
Page 426: ...426 Ethernet CFM Commands ...
Page 486: ...486 IPv6 Access List Commands ...
Page 497: ...IPv6 MLD Snooping Commands 497 Vlan Ipv6 Address Ports ...
Page 498: ...498 IPv6 MLD Snooping Commands ...
Page 512: ...512 IP Source Guard Commands ...
Page 524: ...524 iSCSI Optimization Commands ...
Page 532: ...532 Link Dependency Commands ...
Page 572: ...572 Port Aggregator Commands ...
Page 756: ...756 VLAN Commands ...
Page 762: ...762 Voice VLAN Commands ...
Page 796: ...796 802 1x Commands ...
Page 798: ...798 Layer 3 Commands ...
Page 842: ...842 DHCP Server and Relay Agent Commands ...
Page 868: ...868 DVMRP Commands ...
Page 888: ...888 IGMP Commands ...
Page 896: ...896 IGMP Proxy Commands ...
Page 938: ...938 IP Routing Commands ...
Page 1012: ...1012 IPv6 Routing Commands ...
Page 1016: ...1016 Loopback Interface Commands ...
Page 1048: ...1048 Multicast Commands ...
Page 1064: ...1064 IPv6 Multicast Commands RP Address 3001 1 origin BSR ...
Page 1142: ...1142 OSPF Commands ...
Page 1202: ...1202 OSPFv3 Commands ...
Page 1212: ...1212 Router Discovery Protocol Commands ...
Page 1228: ...1228 Routing Information Protocol Commands ...
Page 1260: ...1260 Virtual Router Redundancy Protocol Commands ...
Page 1262: ...1260 Utility Commands ...
Page 1272: ...1270 Auto Install Commands ...
Page 1306: ...1304 Captive Portal Commands ...
Page 1316: ...1314 CLI Macro Commands ...
Page 1334: ...1332 Clock Commands ...
Page 1340: ...1338 Command Line Configuration Scripting Commands ...
Page 1362: ...1360 Configuration and Image File Commands ...
Page 1363: ...Configuration and Image File Commands 1361 ...
Page 1364: ...1362 Configuration and Image File Commands ...
Page 1412: ...1408 Password Management Commands ...
Page 1436: ...1432 RMON Commands ...
Page 1476: ...1472 Sflow Commands ...
Page 1536: ...1532 Syslog Commands ...
Page 1602: ...1598 Telnet Server Commands ...
Page 1604: ...1600 Terminal Length Commands ...
Page 1618: ...1614 User Interface Commands ...
Page 1638: ...1634 Web Server Commands ...
Page 1680: ...1676 Appendix A List of Commands ...
Page 1681: ......
Page 1682: ...www dell com support dell com Printed in the U S A ...