Cisco Cisco DWDM Transceiver Modules 白皮書

 

 

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When a Cisco Nexus switch with the POAP feature boots and does not find the startup configuration, the switch 

enters POAP mode, locates a Domain Host Configuration Protocol (DHCP) server, and boots itself with its 

interface IP address, gateway, and Domain Name System (DNS) server IP address. The switch also obtains the IP 

address of a Trivial FTP (TFTP) server or the URL of an HTTP server and downloads a configuration script that 

enables the switch to download and install the appropriate software image and configuration file (Figure 7). 

POAP enables touchless bootup and configuration of new Cisco Nexus 9000 Series Switches, reducing the need 

for time-consuming, error-prone, manual tasks to scale network capacity. 

Figure 7.    Automated Provisioning of Cisco Nexus 9000 Series with POAP 

 

Enhanced Cisco NX-OS on the Cisco Nexus 9000 Series integrates an Extensible Messaging and Presence 

Protocol (XMPP) client into the operating system. This integration allows a Cisco Nexus 9000 Series Switch to be 

managed and configured by XMPP-enabled chat clients, which are commonly used for human communication. 

XMPP support enables several useful capabilities: 

● 

Group configuration: Add a set of Cisco Nexus 9000 Series devices to a chat group and manage a set of 

Cisco Nexus 9000 Series Switches as a group. This capability can be useful for pushing common 

configurations to a set of Cisco Nexus 9000 Series devices instead of configuring the devices individually. 

● 

Single point of management: The XMPP server can act as a single point of management. Users 

authenticate with a single XMPP server and gain access to all the devices registered on the server. 

● 

Security: The XMPP interface supports role-based access control (RBAC) and helps ensure that users can 

run only the commands that they are authorized to run. 

● 

Automation: XMPP is an open, standards-based interface. This interface can be used by scripts and 

management tools to automate management of Cisco Nexus 9000 Series devices (Figure 8).