Precision Time Protocol - Cisco Nexus 7000 Series Configuration Manual

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Precision Time Protocol

Precision Time Protocol
The Precision Time Protocol (PTP) is a time synchronization protocol for nodes distributed across a network.
Its hardware timestamp feature provides greater accuracy than other time synchronization protocols such as
Network Time Protocol (NTP). For more information about PTP.
Cisco Discovery Protocol
You can use the Cisco Discovery Protocol (CDP) to discover and view information about all Cisco equipment
that is directly attached to your device. CDP runs on all Cisco-manufactured equipment including routers,
bridges, access and communication servers, and switches. CDP is media and protocol independent, and gathers
the protocol addresses of neighboring devices, discovering the platform of those devices. CDP runs over the
data link layer only. Two systems that support different Layer 3 protocols can learn about each other.
System Messages
You can use system message logging to control the destination and to filter the severity level of messages that
system processes generate. You can configure logging to a terminal session, a log file, and syslog servers on
remote systems.
System message logging is based on RFC 3164. For more information about the system message format and
the messages that the device generates, see the Cisco NX-OS System Messages Reference.
Smart Call Home
Call Home provides an e-mail-based notification of critical system policies. Cisco NX-OS provides a range
of message formats for optimal compatibility with pager services, standard e-mail, or XML-based automated
parsing applications. You can use this feature to page a network support engineer, e-mail a Network Operations
Center, or use Cisco Smart Call Home services to automatically generate a case with the Technical Assistance
Center.
Rollback
The rollback feature allows you to take a snapshot, or checkpoint, of the device configuration and then reapply
that configuration at any point without having to reload. Rollback allows any authorized administrator to
apply this checkpoint configuration without requiring expert knowledge of the features configured in the
checkpoint.
Session Manager allows you to create a configuration session and apply all commands within that session
atomically.
Cisco Nexus 7000 Series NX-OS System Management Configuration Guide
14
Overview

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