The following are examples of the output of each command:
salmon#show cdp neighbors
Capability Codes: R - Router, T - Trans Bridge, B - Source Route Bridge
S - Switch, H - Host, I - IGMP, r - Repeater
Device ID Local Intrfce Holdtme Capability Platform Port ID
marlin Ser 0/0 172 R 3640 Ser 0/0
069017443(switch_a) Eth 0/0 141 T B S WS-C5500 2/13
10.254.254.0/24
Network
VLAN 45
Server Segment
E0/0 Salmon
S0/0 S0/0
FA0/1
FA1/1
FA0/0
7/2
Trunk
E0/0 - 10.254.254.1/24
S0/0 10.10.10.1/30
FA0/1 - 10.20.20.1/24
S0/0 10.10.10.2/30
Management Interface VLAN 2
10.40.40.2
FA0/0.2 - 10.440.40.1/30
FA0/0.45 - 10.45.45.1/24
FA0/0.46 - 10.46.46.1/24
FA1/1 - 10.20.20.2/24
Marlin
Tuna
Core_Switch
EIGRP 200
OSPF 21
Device Name,
Model Location FlashDRAMCATOS
Mgmt
IP
VTP
Domain VTP Mode Port Speed Duplex VLAN(s)
STP State
(Fwd/Block)
Portfast
(Yes/No)
Trunk
(Yes/No
core_switch,
6509
Dover,
DE 16 64 6.4(3) 10.40.40.2 dover_coreTransparent 1/1 1000 Full 1,2,45,46 Fwd No Yes
1/2 1000 Full 1,2,45,46 Block No Yes
3/1 100 Full 45 Fwd Yes No
3/2 10 Half 45 Fwd Yes No
3/3 A-100 A-Full 45 Fwd Yes No
salmon#show cdp neighbors detail
-------------------------
Device ID: marlin
Entry address(es):
IP address: 10.10.10.2
Platform: cisco 3640, Capabilities: Router
Interface: Serial0/0, Port ID (outgoing port): Serial0/0
Holdtime : 160 sec
Version :
Cisco Internetwork Operating System Software
IOS (tm) 3600 Software (C3640-JS56I-M), Version 12.1(2), RELEASE
SOFTWARE (fc2)
Copyright (c) 1986-2000 by cisco Systems, Inc.
Compiled Thu 08-Dec-00 04:50 by phanguye
-------------------------
Device ID: 069017443(switch_a)
Entry address(es):
IP address: 10.254.254.102
Platform: WS-C5500, Capabilities: Trans-Bridge Source-Route-Bridge
Switch
Interface: Ethernet0/0, Port ID (outgoing port): 2/13
Holdtime : 130 sec
Version :
WS-C5500 Software, Version McpSW: 4.5(5) NmpSW: 4.5(5)
Copyright (c) 1995-1999 by Cisco Systems
Because these commands are available in both routers and switches, you can
effectively move across the network one device at a time, documenting each
neighbor along the way.
One final recommendation: Accuracy is the key to any successful documentation strategy. As
things change in the network, your documents must be updated to reflect these changes. It is
usually best to get in the habit of changing your documents as a normal part of changing the network,
not as an afterthought. (This applies to scheduled changes as well as after troubleshooting!)
In this manner, you are less likely to get involved in other tasks and forget to update the
documentation.