Simple Network Time Protocol - Nortel 4500 Series Overview-System Configuration

This feature is supported only by the Web interface.
During the initial setup mode, all ports in the switch or stack are assigned
to the default VLAN.
You can use the Web Quick Start screen to configure the following
information:
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Simple Network Time Protocol

The Simple Network Time Protocol (SNTP) is a subset of the Network Time
Protocol. It provides a simple mechanism for time synchronization.
Clocks use NTP to synchronize to a few milliseconds, depending on the
clock source and local clock hardware.
SNTP synchronizes the Universal Coordinated Time (UTC) to accuracy
within 1 second.
This feature adheres to the RFC 2030 (MIB is the s5agent). With this
feature, the system can obtain the time from any RFC 2030-compliant NTP
or SNTP server.
The SNTP client implementation for this feature is unicast. The SNTP
client operates typically in a unicast mode but can use the broadcast and
multicast modes.
SNTP accuracy is typically in the order of significant fractions of a second.
This accuracy correlates to the latencies between the SNTP client device
and the NTP server. In a low-latency network, the SNTP accuracy can be
reduced to less than a 100 millisecond range and, to further increase the
accuracy, you can use a simple latency measurement algorithm.
The intended accuracy for this implementation is 1 second, which is
sufficient for logs and time displays on UIs.
The system retries connecting with the NTP server a maximum of three
times, with 5 minutes between each retry.
Copyright © 2007, Nortel Networks
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Features of the Nortel Ethernet Routing Switch 4500 Series 143
switch or stack IP address
subnet mask
default gateway
SNMP Read community
SNMP Write community
SNMP Trap IP addresses and communities (up to four4)
Quick Start VLAN
Nortel Ethernet Routing Switch 4500 Series
Overview — System Configuration
NN47205-500 02.01 Standard
5.0 23 February 2007
Nortel Networks Confidential