Cisco WS-C2960-24PC-L Software Guide - Page 353
Displaying CDP Neighbor Information
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Chapter 21 Configuring CDP Configuring CDP on the Switch Displaying CDP Neighbor Information To display information about directly connected Cisco devices, enter the show cdp neighbors command. To display specific information, use the following keywords: • To display the native VLAN for the connected ports, enter the vlan keyword. • To display the duplex mode for the connected ports, enter the duplex keyword. • To display the device capability codes for the connected device, enter the capabilities keyword. • To display the device capability codes for the connected device, enter the detail keyword. To display information about directly connected Cisco devices, perform this task in privileged mode: Task View information about CDP neighbors. Command show cdp neighbors [mod_num[/port_num]] [vlan | duplex | capabilities | detail] This example shows how to display CDP neighbor information for connected Cisco devices: Console> (enable) show cdp neighbors * - indicates vlan mismatch. # - indicates duplex mismatch. Port Device-ID Port-ID Platform 2/3 JAB023807H1(2948) 2/2 WS-C2948 3/1 JAB023806JR(4003) 2/1 WS-C4003 3/2 JAB023806JR(4003) 2/2 WS-C4003 3/5 JAB023806JR(4003) 2/5 WS-C4003 3/6 JAB023806JR(4003) 2/6 WS-C4003 Console> (enable) This example shows how to display the native VLAN for each port that is connected on the neighboring device (there is a native VLAN mismatch between port 3/6 on the local switch and port 2/6 on the neighbor device, as indicated by the asterisk [*]): Console> (enable) show cdp neighbors vlan * - indicates vlan mismatch. # - indicates duplex mismatch. Port Device-ID Port-ID NativeVLAN 2/3 JAB023807H1(2948) 2/2 522 3/1 JAB023806JR(4003) 2/1 100 3/2 JAB023806JR(4003) 2/2 100 3/5 JAB023806JR(4003) 2/5 1 3/6 JAB023806JR(4003) 2/6* 1 Console> (enable) This example shows how to display detailed information about the neighboring device: Console> (enable) show cdp neighbors 2/3 detail Port (Our Port): 2/3 Device-ID: JAB023807H1(2948) Device Addresses: IP Address: 172.20.52.36 Holdtime: 132 sec Capabilities: TRANSPARENT_BRIDGE SWITCH Version: WS-C2948 Software, Version McpSW: 5.1(57) NmpSW: 5.1(1) Copyright (c) 1995-1999 by Cisco Systems, Inc. 78-15486-01 Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide-Release 8.1 21-5
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