Cisco ASR 900 Series Configuration Manual
Discovery protocol configuration guide, cisco ios xe fuji 16.7.x
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Also See for ASR 900 Series:
- Release notes (310 pages) ,
- Manual (174 pages) ,
- Configuration manual (172 pages)
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Cisco Discovery Protocol Configuration Guide, Cisco IOS XE Fuji 16.7.x,
(Cisco ASR 900 Series)
Cisco Discovery Protocol Version 2
Finding Feature Information
Prerequisites for Using Cisco Discovery Protocol
Restrictions for Using Cisco Discovery Protocol
Information About Using Cisco Discovery Protocol
How to Use Cisco Discovery Protocol Version 2
Configuration Examples for Cisco Discovery Protocol Version 2
Additional References for Cisco Discovery Protocol Version 2
Feature Information for Cisco Discovery Protocol Version 2
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Table of Contents
Related Manuals for Cisco ASR 900 Series
Summary of Contents for Cisco ASR 900 Series
- Page 1 Cisco Discovery Protocol Configuration Guide, Cisco IOS XE Fuji 16.7.x, (Cisco ASR 900 Series) Cisco Discovery Protocol Version 2 Finding Feature Information Prerequisites for Using Cisco Discovery Protocol Restrictions for Using Cisco Discovery Protocol Information About Using Cisco Discovery Protocol...
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Page 2: Cisco Discovery Protocol Version 2
• Cisco Discovery Protocol is not supported on Frame Relay multipoint subinterfaces. • If a neighbor has no IP address on an interface enabled with Cisco Discovery Protocol, the IP address of another interface will be updated as IP address for the non-IP address interface. - Page 3 Type-Length-Value Fields Type-Length-Value (TLV) fields are blocks of information embedded in Cisco Discovery Protocol advertisements. Information in advertisements varies, and the TLV frame format allows for extending advertisements when needed. The table below summarizes the TLV definitions. Table 1: Type-Length-Value Definitions for Cisco Discovery Protocol Version 2...
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Page 4: Cisco Discovery Protocol
Subnetwork Access Protocol (SNAP) headers. Cisco devices never forward Cisco Discovery Protocol packets. Cisco devices that support Cisco Discovery Protocol store the information received in a table. Information in this table is refreshed every time an advertisement is received, and information about a device is discarded after three advertisements from that device are missed. - Page 5 Cisco Discovery Protocol Support in IPv6 Cisco Discovery Protocol in IPv6 functions in the same way as in IPv4 and offers the same benefits. The IPv6 enhancement allows Cisco Discovery Protocol to exchange IPv6 and neighbor addressing information. The enhancement also provides IPv6 information to network management products and troubleshooting tools.
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Page 6: How To Use Cisco Discovery Protocol Version 2
• Works with SNMP by learning SNMP agent addresses and sending SNMP queries. How to Use Cisco Discovery Protocol Version 2 Disabling and Enabling Cisco Discovery Protocol on a Cisco Device Disabling Cisco Discovery Protocol on a Supported Device Procedure... - Page 7 Protocol was previously disabled. For example, when interface encapsulation changes from PPP to High-Level Data Link Control (HDLC), Cisco Discovery Protocol is reenabled on that interface even though it was explicitly disabled with the no cdp run command on that interface. This behavior is by design. The encapsulation changes the Layer 2 protocol configured for that interface and resets the interface configuration to the default Cisco Discovery Protocol state of being enabled, assuming that Cisco Discovery Protocol is enabled globally on the device.
- Page 8 ! Cisco Discovery Protocol is disabled. Device(config-if)# end Enabling Cisco Discovery Protocol on a Supported Interface If the encapsulation of an interface is changed, Cisco Discovery Protocol is reenabled on that interface, Note even if Cisco Discovery Protocol was previously disabled.
- Page 9 Returns the CLI to privileged EXEC mode. Example: Device(config-if)# end Setting the Transmission Timer and Hold Time Perform this task to set the frequency of Cisco Discovery Protocol transmissions and the hold time for Cisco Discovery Protocol packets. Procedure Command or Action...
- Page 10 Device(config)# end Disabling and Reenabling Cisco Discovery Protocol Version 2 Advertisements The broadcasting of Cisco Discovery Protocol Version 2 advertisements is enabled by default on Cisco devices. To disable or reenable this broadcasting, perform these tasks. Disabling Cisco Discovery Protocol Version 2 Advertisements...
- Page 11 Command or Action Purpose Step 3 no cdp advertise-v2 Disables the broadcasting of Cisco Discovery Protocol Version 2 advertisements. Example: Device(config)# no cdp advertise-v2 Step 4 Exits to privileged EXEC mode. Example: Device(config)# end Enabling Cisco Discovery Protocol Version 2 Advertisements...
- Page 12 Monitoring and Maintaining Cisco Discovery Protocol Perform this task to monitor and maintain Cisco Discovery Protocol on a device. This task and all its steps are optional, and the steps can be performed in any sequence. Procedure Command or Action...
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Page 13: Configuration Examples For Cisco Discovery Protocol Version 2
Encapsulation is HDLC Sending CDP packets every 30 seconds Holdtime is 90 seconds Example: Monitoring and Maintaining Cisco Discovery Protocol The following example shows a series of commands that you can use to view Cisco Discovery Protocol information: Device# show cdp... -
Page 14: Additional References For Cisco Discovery Protocol Version 2
Interface: Gigabitethernet0/0, Port ID (outgoing port): Gigabitethernet0/15 Holdtime : 139 sec Version : Cisco IOS C2950 Software (C2950-I6Q4L2-M), Version 12.1(9)EA1, RELEASE SOFTWARE Device# show cdp traffic CDP counters : Total packets output: 81684, Input: 81790 Hdr syntax: 0, Chksum error: 0, Encaps failed: 0... -
Page 15: Feature Information For Cisco Discovery Protocol Version 2
Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To access Cisco Feature Navigator, go to www.cisco.com/go/cfn. An account on Cisco.com is not required. - Page 17 Cisco and the Cisco logo are trademarks or registered trademarks of Cisco and/or its affiliates in the U.S. and other countries. To view a list of Cisco trademarks, go to this URL: www.cisco.com/go/trademarks . Third-party trademarks mentioned are the property of their respective owners. The use of the word partner does not imply a partnership relationship between Cisco and any other company.
- Page 18 Cisco Systems, Inc. Cisco Systems (USA) Pte. Ltd. Cisco Systems International BV San Jose, CA 95134-1706 Singapore Amsterdam, The Netherlands Cisco has more than 200 offices worldwide. Addresses, phone numbers, and fax numbers are listed on the Cisco Website at www.cisco.com/go/offices.