6.12. CDP (Cisco Discovery Protocol)
6.12.1. clear cdp counters
#clear cdp counters
3750G#show cdp
Global CDP information:
Sending CDP packets every 60 seconds
Sending a holdtime value of 180 seconds
Sending CDPv2 advertisements is enabled
#show cdp entry *
-------------------------
Device ID: C2960G-0.246
Entry address(es):
IP address: 172.16.0.246
Platform: cisco WS-C2960G-48TC-L, Capabilities: Switch IGMP
Interface: GigabitEthernet2/0/12, Port ID (outgoing port): GigabitEthernet0/48
Holdtime : 125 sec
Version :
Cisco IOS Software, C2960 Software (C2960-LANBASEK9-M), Version 12.2(50)SE5, RELEASE SOFTWARE (fc1)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2010 by Cisco Systems, Inc.
Compiled Tue 28-Sep-10 13:44 by prod_rel_team
advertisement version: 2
Protocol Hello: OUI=0x00000C, Protocol ID=0x0112; payload len=27, value=00000000FFFFFFFF010221FF000000000000203706668480FF0000
VTP Management Domain: 'example'
Native VLAN: 1
Duplex: full
Management address(es):
IP address: 172.16.0.246
-------------------------
Device ID: CN282981530095
Entry address(es):
IP address: 192.168.3.63
Platform: PCM6220, Capabilities: Router
Interface: GigabitEthernet1/0/1, Port ID (outgoing port): 1/0/17
Holdtime : 161 sec
Version :
3.1.3.9
advertisement version: 2
Management address(es):
-------------------------
Device ID: A1601-3750G
Entry address(es):
IP address: 172.16.0.241
Platform: cisco WS-C3750G-24TS-1U, Capabilities: Router Switch IGMP
Interface: GigabitEthernet1/0/11, Port ID (outgoing port): GigabitEthernet1/0/1
Holdtime : 177 sec
--More--
6.12.4. show cdp interface
#show cdp interface
GigabitEthernet1/0/1 is up, line protocol is up
Encapsulation ARPA
Sending CDP packets every 60 seconds
Holdtime is 180 seconds
GigabitEthernet1/0/2 is up, line protocol is up
Encapsulation ARPA
Sending CDP packets every 60 seconds
Holdtime is 180 seconds
GigabitEthernet1/0/3 is down, line protocol is down
Encapsulation ARPA
Sending CDP packets every 60 seconds
Holdtime is 180 seconds
GigabitEthernet1/0/4 is down, line protocol is down
Encapsulation ARPA
Sending CDP packets every 60 seconds
Holdtime is 180 seconds
GigabitEthernet1/0/5 is down, line protocol is down
Encapsulation ARPA
Sending CDP packets every 60 seconds
Holdtime is 180 seconds
GigabitEthernet1/0/6 is down, line protocol is down
Encapsulation ARPA
Sending CDP packets every 60 seconds
Holdtime is 180 seconds
GigabitEthernet1/0/7 is up, line protocol is up
Encapsulation ARPA
Sending CDP packets every 60 seconds
Holdtime is 180 seconds
GigabitEthernet1/0/8 is up, line protocol is up
Encapsulation ARPA
Sending CDP packets every 60 seconds
Holdtime is 180 seconds
GigabitEthernet1/0/9 is up, line protocol is up
Encapsulation ARPA
Sending CDP packets every 60 seconds
Holdtime is 180 seconds
GigabitEthernet1/0/10 is down, line protocol is down
Encapsulation ARPA
Sending CDP packets every 60 seconds
Holdtime is 180 seconds
GigabitEthernet1/0/11 is up, line protocol is up
Encapsulation ARPA
Sending CDP packets every 60 seconds
--More--
6.12.5. show cdp neighbors
#show cdp neighbors
Capability Codes: R - Router, T - Trans Bridge, B - Source Route Bridge
S - Switch, H - Host, I - IGMP, r - Repeater, P - Phone
Device ID Local Intrfce Holdtme Capability Platform Port ID
C2960G-0.246 Gig 2/0/12 172 S I WS-C2960G Gig 0/48
CN282981530095 Gig 1/0/1 177 R PCM6220 1/0/17
A1601-3750G Gig 1/0/11 164 R S I WS-C3750G Gig 1/0/1
Switch Gig 2/0/7 152 S I WS-C3750X Gig 1/0/48
Switch Gig 2/0/11 175 S I WS-C2960- Fas 0/48
CN0D162M2829817C0042A04
Gig 1/0/2 163 R PC8024 1/0/10
G2960-0.252 Gig 2/0/15 73 S I WS-C2960G Gig 0/48
G2960-0.253 Gig 2/0/13 76 S I WS-C2960G Gig 0/48
G2960-0.250 Gig 2/0/19 179 S I WS-C2960G Gig 0/48
c2960-0.248 Gig 2/0/21 66 S I WS-C2960S Gig 1/0/48
c2960-0.251 Gig 2/0/17 146 S I WS-C2960G Gig 0/48
c2960-0.245 Gig 2/0/23 74 S I WS-C2960- Gig 0/2
#show cdp neighbors detail
-------------------------
Device ID: C2960G-0.246
Entry address(es):
IP address: 172.16.0.246
Platform: cisco WS-C2960G-48TC-L, Capabilities: Switch IGMP
Interface: GigabitEthernet2/0/12, Port ID (outgoing port): GigabitEthernet0/48
Holdtime : 133 sec
Version :
Cisco IOS Software, C2960 Software (C2960-LANBASEK9-M), Version 12.2(50)SE5, RELEASE SOFTWARE (fc1)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2010 by Cisco Systems, Inc.
Compiled Tue 28-Sep-10 13:44 by prod_rel_team
advertisement version: 2
Protocol Hello: OUI=0x00000C, Protocol ID=0x0112; payload len=27, value=00000000FFFFFFFF010221FF000000000000203706668480FF0000
VTP Management Domain: 'example'
Native VLAN: 1
Duplex: full
Management address(es):
IP address: 172.16.0.246
-------------------------
Device ID: CN282981530095
Entry address(es):
IP address: 192.168.3.63
Platform: PCM6220, Capabilities: Router
Interface: GigabitEthernet1/0/1, Port ID (outgoing port): 1/0/17
Holdtime : 167 sec
Version :
3.1.3.9
advertisement version: 2
Management address(es):
-------------------------
Device ID: A1601-3750G
Entry address(es):
IP address: 172.16.0.241
Platform: cisco WS-C3750G-24TS-1U, Capabilities: Router Switch IGMP
Interface: GigabitEthernet1/0/11, Port ID (outgoing port): GigabitEthernet1/0/1
Holdtime : 125 sec
--More--