When enabled, the router captures the packets sent and received. The packets are stored within a buffer in DRAM and are thus not persistent through a reload. Once the data is captured, it can be examined in a summary or detailed view on the router.
In addition, the data can be exported as a packet capture PCAP file to allow for further examination. The tool is configured in exec mode and is considered a temporary assistance tool. As a result, the tool configuration is not stored within the router configuration and will not remain in place after a system reload. The Packet Capture Config Generator and Analyzer tool is available for Cisco Customers to aid in the configuration, capture, and extraction of packet captures.
Note : This output only shows the hex dump of the packets captures. In order to see them in human readable there are two ways.
Cisco IOS XE enables model-driven programmability, application hosting, and configuration management, automating day-to-day tasks. Catalyst Series. CBR Series. Deploy faster with a strategic plan, migration strategy, and roadmap. Drive operational excellence with services to help improve security and visibility. The certificate-install service provides a simple XML to install the server, self-signed or signed by standard CA certificates on the device, before initiating an HTTPs connection.
The certificate-install service also provides an option to install the client SSL certificate and instruct the device to use the same SSL certificate during the next device authentication process. The SSL communication ensures encryption of the data packets exchanged between the server and the device, but does not provide a solution to authenticate the device. SUDI is a X. The agent provides the following mechanisms that can be used by the server to authenticate the device as a genuine Cisco device:.
After validating, the HTTPs server allows the device to connect to the server. If the device is loaded with SUDI certificate, the PnP agent reads the serial number from the SUDI certificate and presents the same information as an additional tag in the work-request body for all communication with the server. To achieve this, the following optional tag is added in the work-info message, which goes out from the device in every work-request. This field is optional and does not show up for devices that does not have SUDI certificate.
There is no change in the existing UDI mechanism that is read from the chassis inventory. The agent continues to be backwards compatible by sending the chassis UDI as the primary identifier. The server can use the additionally provided SUDI-based serial number to authenticate the device and then continue to use the primary UDI. Therefore, the server should continue with the primary UDI for authentication and further communication. There is no mechanism available to read the SUDI-based serial number from member hardware and there is no change in how UDI is read from other members on a stack or HA unit.
The agent will continue to read the UDI from all the hardware units as it does presently. If the device is loaded with the SUDI certificate, the agent provides a new PnP service, which allows the server to help the device to identify itself. The availability of this new service depends on the presence of the SUDI certificate and is listed in the agent's capability service. The new capability response has the following response:.
Along with the above change in the capability-service, the agent adds an additional field under the hardware-info section of the device-info response, to specify and check whether the SUDI certificate is built into the device.
After, the agent initiates an HTTPs connection with the server and sends a work-request, the server should be able to use the device authentication service for a challenge request-response.
The device authentication service requires a minimum of one field to generated a string by the server. Optionally, the server can send a list of encryptions and hashing methods that it can support. The agent checks whether it has the capability to use any of the listed encryption methods specified by the server, uses the encryption method and sends a notification to the server. If the agent does not have the capability to use any of the methods specified by the server, then the agent responds with an error message.
When the server sends a device authentication service request to the agent, the agent does the following:. If the agent does not have capability to use one of the specified encryption and hashing methods, the agent responds with an error message.
Decrypts the cipher-string using the public key that is available in the SUDI or client certificate. Generates a session key string and sends it back to the device as an acknowledgment. After the agent receives the final acknowledgment from the server with the session-key, it associates the corresponding profile with the provided session-key and sends it to the server as an attribute in the root PnP section of all the subsequent messages that the agent sends.
The following example shows the session-key in the response section of image-install service. The session-key appears in the response section of all other services including the notify-services. The server validates the session-key before sending any message from the device. Optionally, the server maintains a timer for the session-keys and moves to invalid status when the timer expires.
If the agent sends a message with an expired session-key, the server repeats the device authentication process and generate a new session-key before sending to the same device again. If the device sends a request without any session-key, then the server performs the device authentication process and generates a new session-key before sending to the same device.
The following figure displays the message sequence between the agent and the server to accomplish the device authentication using the SUDI certificate. String of alphanumeric characters that specify a name for the PnP agent profile. Profile names cannot be duplicated. Perform the following task to configure the time to wait before attempting to reconnect a session in either fixed-interval-backoff, exponential-backoff, or random-exponential-backoff mode:.
Specifies the time for the PnP agent initiator profile to wait before attempting to reconnect a session. The pause-time value is the time to wait, in seconds, before attempting to reconnect after a connection is lost. The range is from 1 to The default is Exponential backoff factor value is the value that triggers the reconnect attempt exponentially. The range is from 2 to 9. Alternately, a hostname can also be used in the configuration to connect to the PnP server. Every profile can have one primary server and a backup server configuration.
The PnP agent attempts to initiate a connection with the primary server first and if it fails, it will try the backup server. If the backup server fails, the PnP agent will attempt to connect to the primary server again. This will continue until a connection is established with one of the servers. The value of the host specifies the host name, port, and source of the server. The value of the interface-type specifies the interface on which the agent is connected to the server.
The value of localcert specifies the trustpoint used for client-side authentication during the transport layer security TLS handshake. The value of remotecert specifies the trustpoint used for server certificate validation. Configure the trustpoint-name using the crypto pki trustpoint command. Perform the following task to create a backup profile and to enable or disable Open Plug-n-Play agent manually on a device:. Perform the following task to configure backup reconnection of the Open Plug-n-Play PnP agent to the server in either fixed-interval-backoff, exponential-backoff, or random-exponential-backoff manner :.
Use the pnp tag command to configure the tag for the device. If there is an existing tag for the device, the tag name can be only changed when the xml schema is sent by the PnP server to change the tag name. The tag name cannot be overwritten. String of alphanumeric characters that specify a name for the PnP agent tag. The following example shows how to configure Cisco Open Plug-n-Play PnP agent and the output of the show pnp profile command:.
That is, start the service interaction between PnP agent and PnP server. Capture the debugs by executing the debug pnp service command. This is a PnP enabled device in the neighborhood that can be configured to act as a PnP proxy server.
PnP Helper Applications : Applications on smart phones and personal computers that facilitate deployment. PnP helper applications are not specific to a customer or device and can be used in any deployment scenario.
May be needed in limited scenarios. This is an open protocol allowing third-party development of PnP servers. PnP Server : A central server that manages and distributes deployment information images, configurations, files, and licenses for the devices being deployed. Open Plug-n-Play PnP server provides a north bound interface for management applications and communicates with the PnP agents on the devices using the PnP protocol. PnP commands: Complete command syntax, command mode, command history, defaults, usage guidelines, and examples.
The Cisco Support and Documentation website provides online resources to download documentation, software, and tools. Use these resources to install and configure the software and to troubleshoot and resolve technical issues with Cisco products and technologies. Access to most tools on the Cisco Support and Documentation website requires a Cisco.
The following table provides release information about the feature or features described in this module. This table lists only the software release that introduced support for a given feature in a given software release train. Unless noted otherwise, subsequent releases of that software release train also support that feature. The Cisco Open Plug-n-Play agent converges existing solutions into a unified agent and adds functionality to enhance the current deployment solutions.
All rights reserved. Finding Feature Information Your software release may not support all the features documented in this module. Ensure that the PnP server talks to the PnP agent. Simplified deployment process of any Cisco device automates the following deployment related operational tasks: Establishing initial network connectivity for the device Delivering device configuration Delivering software and firmware images Delivering licenses Delivering deployment script files Provisioning local credentials Notifying other management systems about deployment related events Simplified deployment reduces the cost and complexity and increases the speed and security of deployments.
The main objectives of PnP agent are: Provide consistent day 1 deployment solution for all the deployment scenarios. Add new features to improve existing solutions. Configuration Upgrade There are two types of configuration upgrades that can happen in a Cisco device—copying a new configuration files to startup configuration and copying new configuration files to running configuration. Device Information The PnP agent provides capability to extract device inventory and other important information to the PnP server on request.
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