CDP neighbors

Similar Questions

• SH cdp neighbors port-channel command

  Hello

  I have a strange problem with the command sh cdp neighbors port-channel on my 3750 and 4500switches.

  When I execute the command ' sh cdp neighbors port-channel. I don't see my say on this interface.

  The command 'sh cdp nei' with the port-channel works very well and shows all my neighbors.

  switch #sh cdp neighbors port-channel 1

  Ability code: R - router, T - bridge Trans, B - road Source bridge
  S switch, H - host, I - IGMP, r - Repeater, P - phone.
  D / remote, C - AEVC, M - two port Mac relay

  Device ID Local Intrfce Holdtme Port platform capability ID
  

  switch #sh ether summary
  Flags: - Low P - D bundled in port-channel
  I have - autonomous s - suspended
  H Eve (LACP only)
  R - Layer 3 S - Layer2
  U - running f - cannot allocate an aggregator

  M - don't use, minimum contacts not satisfied
  u - unfit to tied selling
  w waiting to be aggregated
  d default port

  Number of channels: 1

  Number of aggregators: 2

  Protocol for the Port-Channel port group
  ------+-------------+-----------+-----------------------------------------------
  1 Po1 (SU) LACP Gi1/0/1 (P) article gi1/0/2 P)
  

  I tried the command on multiple versions of IOS, but always the same question. When I try the command on a 6506-E, it works fine...

  This ordering platform is connected?

  SWITCH2 # sh etherchannel summary
  Flags: - Low P - D bundled in port-channel
  I have - autonomous s - suspended
  H Eve (LACP only)
  R - Layer 3 S - Layer2
  U - N running - is not in service, no aggregation
  f cannot allocate an aggregator

  M not in use, no aggregation due to minimum links has not met
  m don't use, port do not associate due to not meeting minimum links
  u - unfit to tied selling
  d default port

  w waiting to be aggregated
  Number of channels: 7
  Number of aggregators: 7

  Protocol for the Port-Channel port group
  ------+-------------+-----------+-----------------------------------------------
  1 Po1 (SU) LACP Gi1/1 (P) Gi1/2 (P)
  ...

  SWITCH2 #sh cdp nei port-channel 1
  Ability code: R - router, T - bridge Trans, B - road Source bridge
  S switch, H - host, I - IGMP, r - Repeater, P - phone

  Device ID Local Intrfce Holdtme Port platform capability ID
  switch to Gig 1 / 2 123 S I Gig 1/0/1
  switch to Gig 1 / 1 123 S I Gig 1/0/2
  

  Thank you

  Best regards

  Joris

  Hi Joris,

  It is a known problem and is documented as a cosmetic bug internal. Logically speaking, CDP is not supported on etherchannel interfaces and 'sh cdp port-channel' command should not be available.

  The platform of 6500, although the "port channel show cdp neighbor" returns the result, it's just for convenience and does not mean that the CDP is supported on the port channels. In fact, if you try to enable CDP on port-channel on 6500, it generates an error:

  PO1 #int 6500 (config)

  6500(Config-if) #cdp en

  % CDP is not supported on this interface, or for this encapsulation

  If you run "debug cdp events", you can see the packets exchanged on the physical interface rather than on the port-channel. Correct way is to check the neighborship of the cdp on the physical interfaces.

  See you soon,.

  Shashank

  Please rate if you find the content useful

• Using CDP to create the network topology diagram

  Hi all

  I'm a beginning network specialist and just thought I would throw this question and see if I can get some answers.  Well, I want to know how I can use CDP to find out our network topology so I can create diagrams and Visio diagrams, or if you know any free network discovery programs out there that can help?  Hey well any comments will be appreciated so thanks in advance and I look forward to hear something!

  When you run 'sh cdp neighbors' it shows you all the devices connected directly. If you then "sh cdp neighbor detail" for each entry it will show the IP address of the connected device. You can then connect to this and do the same thing all the way throiugh your network.

  I think that the COP may be useful for this, but you're relying on the CDP running on all devices. Sometimes it has been disabled for security reasons one must always be aware that there may be devices that do not display.

  As mentioned SNMP is another alternative, but still once, this assumes that SNMP has been put in place the device esch.

  So just be aware that you can not always get the full picture, but a combination of--

  (1) CDP

  (2) SNMP

  (3) running the determination of route router hops show but not L2 switch.

  You should get most of the information. Also, be aware that the internal firewall tend to dirty such things as well.

  Jon

• Display of the I/O on NGC neighbors?

  When I have connections to connect to the Web via command line, I can 'connect nxos' and 'show cdp neighbors '.  Makes a great job showing me Ethernet switches to the North and connections N1K.  I would do the same for Fibre Channel connections... See who is linking MDS my UCS.

  I can do this also in the installation of NXOS?

  Yes, it is an excellent method to determine the actual switch to which it is connected. The flogi on the switch database will show you the real port. But the switch you need to access this part.

  fabric mgmt addr: 10.x.x.x<- npiv="" switch="" (northbound="">

  fabric pwwn: 20:15:00:0 d: ec:cd:99:80<- npiv="" interface="">

• What device is my node connected to (CLI)?

  I am currently engaged in trying to find what my current node device is connected to and which interface of this device, I am connected to know

  -I know not how to telnet (using putty)

  -I can prompt CMD and ipconfig/all to get my information from devices (and default gateway)

  -I understand ping/apr/cdp neighbors

  However, using these tools, I can't quite seem to put togeather how to find the next immediate device and the port I am connected to without that direct switch IP address on site.

  Make sure that the Cisco Discovery Protocol (CDP) is enabled globally on the switch (run cdp) and on each port (cdp enable). These are the default settings, but may have been disabled for security reasons. Launch Wireshark, filter by cdp packet type and move from one port to the other. Give CDP packets you change your name, IP, IOS version management, and what port you are connected to (among others).

• How to check the system configuration of the SX20 if the touch screen and the remote control does not work

  Hello friends, would like to know how can we access/check the system configuration of the SX20 if we not touch and remote control or they are not in working condition.

  I think that we can check this Switch interface, but unfortunately, I don't have access to the local switch right now.

  Hello

  option is to have access to the local switch and run "show cdp neighbors detail."

  or

  Connect the mobile to PC/computer LAN, run tftpd32 with affected DHCP pool. Then you can login to get the config.

  regds,

  Aman

• Switch P 52 SG500 - web interface shows the wrong model and disconnects randomly

  Ladies and gentlemen!

  One of our network switches is a SG500 switch 52p that recently started showing strange behavior.

  It started with the problem was not more accessible via its web interface. Even if it was running perfectly well access via a web browser finished in wait times.

  After resetting the factory default switch and configure its IP address access at first seemed to work but I had to know that the switch breaks out as a SG300 28 p switch on the administration Web site. In addition, random logoff occurs that send back me to the login page. Each from time to time, the model is correctly displayed after the login, but when I try to manage it I a connected again.

  It still works with an older version of the firmware (1.2.xx I think) but that shouldn't cause such behavior, it should? In any case, I can't update the firmware says the switch as a different model.

  Any suggestions what to do (apart from the RMA)?

  Respect,

  Hendryk

  Hello

  I'm sorry that you are having problems with the device and I'll try to give you the best possible advice in the circumstances.

  The first thing that comes to mind is that you connect to another device, the thought is the SG500. I did the experiment several times before, so I have a few suggestions to ensure we are connection to the device:

  1 - Download the Cisco FINDIT and scan tool you rnetwork, maybe you will find that you have two devices, the SG300 and the SG500. Here is the link:

  https://software.Cisco.com/download/release.html?mdfid=282833583&flowid=...

  2 - go to the switch that you believe to be the SG500, then go to Administration, and then discovered - CDP, and then click CDP neighbor information. Most likely, you will see that you have several switches, including the SG500.

  3. If you have followed suggestions and you still believe, you go to the right switch then call at the 866-606-1866 (of the United States) and we will be happy to help you control the device and replace it if this is the case.

  I really think that the first 2 suggestions will help you realize that you have two switches on your network.

  Please let us know what you find.

• Subject of the vlan voice SRW224G4P

  Hello

  I have configured the SRW as vlan, use vlan for voice 212, 348 for data and communicate with cisco IP Phone.

  database of VLAN
  VLAN, 210-216 345-348
  output
  ID of the vlan voice 212

  !

  !
  interface fastethernet1
  activate the storm control
  Storm-control broadcast level 10
  Storm-control include multicast
  maximum port security by 10 points
  port security mode max-addresses
  port security throw trap 60
  spanning tree portfast
  switchport trunk allowed vlan add 212
  switchport trunk vlan native 348
  macro description ip_phone_desktop
  ! next order is internal.
  macro auto smartport dynamic_type ip_phone_desktop
  !

  but when I show vlan voice,.

  It shows:

  =====================================

  1ASW01 #show voice vlan
  Manage the VLAN voice State is automatically triggered
  Operational status of VoIP VLAN is enabled in auto
  Best Local Voice VLAN ID is 212
  Best Local VPT is 5 (default)
  Best Local DSCP is (by default) 46
  Concerted VLAN voice is received from the 34:62:88:73:05:c9 switch
  Concerted VLAN voice priority is 0 (static source active)
  Concerted Voice VLAN ID is 216
  Agreed VPT is 5
  Agreed DSCP is 46
  Voice VLAN agreed last change is 3 May 13 05:06:31

  =====================================

  I don't know why the vlan 216 became the vlan voice?

  I tried changed the build-in macro settings,

  auto macro of the built-in parameters ip_phone $native_vlan 348
  auto macro of the built-in parameters ip_phone_desktop $native_vlan 348

  but the system could not change the value of $voice_vlan.

  How to fix?

  Hi Skywings,

  So I think the above output is after the change, right? If this is true, it seems that something was wrong during the configuration process. Process of VLAN automatic voice has two main phases where one is related to communication between the switches and other Cisco infrastructure devices and synchronization of voice VLAN ID. The second phase is related to the identification of the end device as phone. What I see in your case that the first phase has failed somehow the voice VLAN ID is different from locally configured. Can you share with me your race and also start-up config more CDP neighbors? You can use private message.

  Kind regards

  Aleksandra

• Engine for the mobility Service configuration

  Hi all

  I try to incorporate a MSE 3350 to an existing Toilet, and I run through questions that I can't understand.  Basically, I went through the initial installation of the MSE and assigned an IP address in the same network the WLCs I installed... it is also connected to the same switch that the WLCs are as well... I don't know how the port must be configured, but I tried to define an access port as a trunk port and I am not yet able to ping or see if I'm doing a cdp neighbor cmd on the switch.

  I looked at the configuration several times and it says that the service is running and intellectual property, SM and GW are all correct so I don't know what else I can check this get up and work.

  Any help with this is greatly appreciated... I tried to look at all the config and design guides, but they tell you mostly what to do once you get the MSE integrated with the WCS.

  Thanks in advance!

  Martin

  The Switch port must be an access port.  Are sure you you have your cables connected to the port correct eth on the MSE?  In my view, there are two, but only one is used.

  -John

• Authentication of command within FAC 5.1

  I have set up a new unit of ACS 5.1 and it seems to take place.  I would like to be able to restrict access to the SHOW CDP NEIGHBOR DETAIL command to a specific group, but continue to allow that SHOW CDP NEIGHBORS.

  I can access the SHOW CDP command or deny them but am unable to get more granular with command arguments.

  Can anyone offer any suggestions?

  Thanks for the help.

  Paul Blake

  This is my example which works very well

  

  and the result

  

  If it is possible

• WLC 2106 routing table do not fill

  Hey guys, I hope you can help with this one.

  I just tried to set up a WLC 2106 and everything seems OK however the routing table is not filled (even directly connected and default route). Currently, I have it plugged into a switch and an AP and they are all two visible in ARP and CDP, but I only ping is peripheral.

  (Cisco Controller) > show the summary

  Number of roads... 0

  Destination Netmask Gateway network

  -------------------    -------------------   -------------------

  (Cisco Controller) > show cdp neighbors detail

  -------------------------

  Device ID:-swt00.asggroup.com.au

  Enter address (s): 10.33.17.62

  Platform: cisco WS-C3750G-48TS, capacity: Switch IGMP router

  Interface: Fastethernet0/0/1, ID of Port (outgoing port): GigabitEthernet1/0/48

  Hold time: 174 s

  Version:

  Cisco IOS software, software C3750 (C3750-IPSERVICESK9-M), Version 12.2 SEE2 (25), RELEASE SOFTWARE (fc1) Copyright (c) 1986-2006 by Cisco Systems, Inc., Compiled Saturday 28 July 06 12:55 by yenanh

  version of the proclamation: 1

  -------------------------

  Device ID: AP1cdf.0f95.732c

  Enter address (s): 10.33.17.10

  Platform: cisco AIR-LAP1142N-N-K9, capacity: Trans-pont

  Interface: Fastethernet0/0/7, ID of Port (outgoing port): GigabitEthernet0

  Hold time: 155 s

  Version:

  Cisco IOS software, C1140 Software (C1140-K9W8-M), Version 12.4 (21 a) JHB1 - VERSION of the SOFTWARE (fc1) Technical Support: http://www.cisco.com/techsupport Copyright (c) 1986-2010 by Cisco Systems, Inc., Compiled Thursday, Aug 11, 10 at 15:45 by prod_rel_team

  -Other - or ITU (q)

  version of the proclamation: 1

  Configuration of the interface

  Name of the interface... ap-Manager

  MAC address... 58.8 d: 09:93:f1:c0

  IP Address....................................... 10.33.17.2

  IP Netmask....................................... 255.255.255.192

  IP Gateway....................................... 10.33.17.62

  State IP NAT outside... People with disabilities

  External IP NAT... 0.0.0.0

  VLAN............................................. 17

  Port of physics... 1

  Primary DHCP server... 10.33.17.1

  Secondary DHCP server... Not configured

  Option DHCP 82... People with disabilities

  ACL.............................................. Not configured

  AP Manager....................................... Yes

  Comments interface... NO.

  ... Management interface

  MAC address... 58.8 d: 09:93:f1:c0

  IP Address....................................... 10.33.17.1

  IP Netmask....................................... 255.255.255.192

  IP Gateway....................................... 10.33.17.62

  State IP NAT outside... People with disabilities

  External IP NAT... 0.0.0.0

  VLAN............................................. 17

  Quarantine-vlan... 0

  Port of physics... 1

  Primary DHCP server... 10.33.17.1

  Secondary DHCP server... Not configured

  Option DHCP 82... People with disabilities

  ACL.............................................. Not configured

  AP Manager....................................... NO.

  Comments interface... NO.

  Any help would be greatly appreciated
  Mark

  Hello

  Removes the brand management and interface of the AP on the WLC Manager and put the management and the Manager of the Ap in the vlan Switchports native...

  example of...

  the command is...

  WLC > config interface management vlan 0

  WLC > config interface vlan ap-Manager 0

  On the switch...

  switchport mode trunk

  switchport trunk dot1q encap

  switchport trunk vlan native 17

  end

  I assumed the management and Manager of the AP are in vlan 17. make the corresponding changes if not 17.

  Let me know if we can t oping after making the above changes...

  Let me know if that answers your question...

  Concerning
  Surendra
  ====
  Please do not forget to note positions that answered your question and mark as answer or was useful

• % SW_MATM-4-MACFLAP_NOTIF: heartbeat

  Hello

  Can someone help with VLAN beat question, I have a topology like this:

  Router > Cisco SG300 > Cisco C2960 > Cisco SF300 - 24 p

  a fighter appear in sw c2960, SF300 - 24 p impact effective c2960, but SF300 - 24 p seems not beat

  and get the error message:

  Decrease 1 22:59:14.943: % SW_MATM-4-MACFLAP_NOTIF: 448a.5b22.4cfd to host in the vlan 3 is flapping between port gi1/0/51 and article gi1/0/34
  Decrease 1 22:59:17.725: % SW_MATM-4-MACFLAP_NOTIF: 902b.3478.8ca5 to host in the vlan 3 is flapping between port gi1/0/51 and article gi1/0/16
  Decrease 1 22:59:38.284: % SW_MATM-4-MACFLAP_NOTIF: 902b.3478.8ca5 to host in the vlan 3 is flapping between port gi1/0/51 and article gi1/0/16
  Decrease 1 22:59:56.484: % SW_MATM-4-MACFLAP_NOTIF: 448a.5b22.4cfd to host in the vlan 3 is flapping between port gi1/0/51 and article gi1/0/34
  Decrease 1 23:00:11.573: % SW_MATM-4-MACFLAP_NOTIF: 448a.5b22.4cfd to host in the vlan 3 is flapping between port gi1/0/51 and article gi1/0/34
  Decrease 1 23:00:11.643: % SW_MATM-4-MACFLAP_NOTIF: 448a.5b8b.6394 to host in the vlan 3 is flapping between port gi1/0/51 and article gi1/0/47
  Decrease 1 23:00:38.731: % SW_MATM-4-MACFLAP_NOTIF: 448a.5b22.4cfd to host in the vlan 3 is flapping between port gi1/0/51 and article gi1/0/34
  Decrease 1 23:00:43.771: % SW_MATM-4-MACFLAP_NOTIF: 902b.3478.8ca5 to host in the vlan 3 is flapping between port gi1/0/51 and article gi1/0/16
  Decrease 1 23:00:49.105: % SW_MATM-4-MACFLAP_NOTIF: 448a.5b22.4cfd to host in the vlan 3 is flapping between port gi1/0/51 and article gi1/0/34
  Decrease 1 23:04:29.715: % SW_MATM-4-MACFLAP_NOTIF: 448a.5b22.4cfd to host in the vlan 3 is flapping between port gi1/0/51 and article gi1/0/34
  Decrease 1 23:04:30.473: % SW_MATM-4-MACFLAP_NOTIF: a45d.36d1.1b1d to host in the vlan 3 is flapping between port gi1/0/51 and article gi1/0/27
  Decrease 1 23:04:31.952: % SW_MATM-4-MACFLAP_NOTIF: 1458.d017.4e6b to host in the vlan 3 is flapping between port gi1/0/51 and article gi1/0/25
  Decrease 1 23:04:51.833: % SW_MATM-4-MACFLAP_NOTIF: 902b.3478.8ca5 to host in the vlan 3 is flapping between port gi1/0/51 and article gi1/0/16

  Cisco SG300 Setup

  interface gigabitethernet27
  Description SAFE-to-SW1-R. ELEKTRO
  No spanning tree portfast
  switchport trunk allowed vlan add 2-3
  switchport trunk vlan 99 native

  Configuration of Cisco C2960

  SH running-config interface section gi1/0/51
  Building configuration...

  Current configuration: 185 bytes
  !
  interface GigabitEthernet1/0/51
  Description a-SW-IT
  switchport trunk vlan 99 native
  switchport trunk allowed vlan 2, 3
  switchport mode trunk
  spanning tree enable bpdufilter
  end

  I'm really confused why this happened, can someone help me?

  Thank you...

  Hello

  You will find what is connected 2960 on gig1/0/51 on the switch. It could be the loop of packets in the network.

  Provide output 'show cdp neighbors' 2960 switch.

  Also is you can update a topology diagram to know what devices are connected to 2960 on gig1/0/51, gig1/0/16, gig1/0/34, gig1/0/27, gig1/0/25 etc...

  Kind regards

  Rod

• Problems to use LAG with 2504 and 3560

  Hello, we recently bought a 2504 wireless controller, and I can't using the aggregation of links (LAG) to connect the WLC to the network.   I was able to connect properly to the contoller using a single link, but as soon as I activate LAG (on the switch and wlc) I'm unable to access the controller.  I think that I have the correct position of the switches as the port channel is active and shows active on the controller via cdp.

  I can't do a ping of the controller, but I see it via cdp.

  The controller runs 7.4.100.0 with bootloader 1.0.18

  The switch is a WS-C3560G-48PS and running 12.2 (25r) SE

  The controller is 10.10.10.202.

  No access-lists on interface vlan switch

  Note that I have currently the 2nd stop of the port as the first member of the Association is active.

  Thoughts?   Any help would be appreciated.

  Thank you

  Bryan

  #sho ip arp 10.10.10.202

  Protocol of age (min) address Addr Type Interface equipment

  Internet 10.10.10.202 143 5478.1aad.1f0b ARPA Vlan1

  #sho address mac-address-table 5478.1aad.1f0b

  Mac address table

  -------------------------------------------

  VLAN Mac Address Type Ports

  ----    -----------       --------    -----

  1 5478.1aad.1f0b m 1 DYNAMIC

  Total of the Mac addresses for this criterion: 1

  #sho cdp neighbors detail

  -------------------------

  Device ID: wubc_wlc

  Workshop / entry:

  IP address: 10.10.10.202

  Platform: AIR-CT2504-K9, capacity: host

  Interface: GigabitEthernet0/40, ID of Port (outgoing port): GigabitEthernet0/0/1

  Hold time: 153 s

  Version:

  Name of the manufacturer: Cisco Systems Inc.  Product name: Cisco Controller Product Version: 7.4.100.0 Version RTOS: Erro Bootloader Version: 1.0.18 Type of Build: DATA + WPS

  version of the announcement: 2

  Duplex: full

  Workshop / management:

  -------------------------

  Device ID: wubc_wlc

  Workshop / entry:

  IP address: 10.10.10.202

  Platform: AIR-CT2504-K9, capacity: host

  Interface: GigabitEthernet0/40, ID of Port (outgoing port): LAGInterface0/3/1

  Hold time: 148 s

  Version:

  Name of the manufacturer: Cisco Systems Inc.  Product name: Cisco Controller Product Version: 7.4.100.0 Version RTOS: Erro Bootloader Version: 1.0.18 Type of Build: DATA + WPS

  version of the announcement: 2

  Workshop / management:

  # sho etherchannel summary

  Flags: D - low P - port-channel

  I have - autonomous s - suspended

  H Eve (LACP only)

  R - Layer 3 S - Layer2

  U - running f - cannot allocate an aggregator

  u - unfit to tied selling

  w waiting to be aggregated

  d default port

  Number of channels: 1

  Number of aggregators: 1

  Protocol for the Port-Channel port group

  ------+-------------+-----------+-----------------------------------------------

  1 Po1 (SU) - Gi0/40 (P) Gi0/42 (D)

  #sho run IM int 0/40

  Building configuration...

  Current configuration: 123 bytes

  !

  interface GigabitEthernet0/40

  switchport trunk encapsulation dot1q

  switchport mode trunk

  channel-group mode 1 on

  end

  #sho run IM int 0/42

  Building configuration...

  Current configuration: 133 bytes

  !

  interface GigabitEthernet0/42

  switchport trunk encapsulation dot1q

  switchport mode trunk

  Shutdown

  channel-group mode 1 on

  end

  #sho run int port-channel 1

  Building configuration...

  Current configuration: 92 bytes

  !

  Interface Port - Channel 1

  switchport trunk encapsulation dot1q

  switchport mode trunk

  end

  Make sure that your markup of the wlc management interface.

  Sent by Cisco Support technique iPhone App

• Call Manager 6.1 network problems

  I have a problem with my network drops continually calls phones or freezing.  Its States CM low features disabled.  We lose calls, phones are freezing intermittently.

  Here is the hardware configuration: MCS-7828-H3

  Platform Type 7828 3 H

  Series MX282400CM

  OS active 6.1.5.10000 - 10

  RTMT shows opt-out phones, but I don't see all devices lose connectivity with the exception of some packet losses minimal for call manager.  No other error not reported in to any device Cisco syslog for example, ping sent to all major network devices have 0 packets lost over the weekend, but 250 on 20 000 ping on the call Manager server is lost.  I replaced the cables, cords and moved from the ports of the switch with no resolution.

  CPU has never been higher than 24%

  Virtual memory never higher than 30%

  Active and Inactive partitions are 15% of disk space.

  We have a 2nd NETWORK adapter on the server, but I can't configure this 2nd NIC as a stand-alone connection for the call Manager server, than as a failover for 1 NIC.  Does anyone know how to configure this 2nd NIC to host all these servers IP services?  Is there a way to replace the NETWORK card on those servers (not on site and have yet to open this box upwards) or do I have to replace the entire server?

  Does anyone have any other suggestions on where to take my troubleshooting?

  Thanks for all the tips!

  Steve

  Please see below, your right in thinking this could be a faulty network card, cable, I suggest you also to search in your STP configuration.
  

  Error Message RTD-1-ADDR_FLAP [tanks] [dec] base10 relearning / min

  Explanation normally, MAC addresses are learned once on a port. Sometimes, when a switched network RECONFIGURES, due either manual or STP reconfiguration, addresses learned on a port are relearned on a different port.  However, if there is a port anywhere in the switched domain that is loop over itself, addresses will jump backwards between the real port and the port that is in the path to the rear port loop. In this message, [tanks] is the interface, and [dec] is the number of addresses being learned.

  Recommended action determine the actual path (port) to the MAC address. Use the ethernet controller of debugging command EXEC addr the privilege of seeing the other path-port on which the address is redisplays. Go to the switch that is connected to this port. Note that the show cdp neighbors command is useful to determine the following switch. Repeat this procedure until the port is found who receives what it transmits and remove this network port.

  Link to Error Message-RTD-1-LINK_FLAP [tanks] down/up [dec] times / min

  Explanation this message means that too many events from the bottom up link was noticed on this interface: [tanks] is the interface, and [dec] is the number of times that the link goes up and down. This could be the result of reconfiguring the port, or it might mean a faulty device at the other end of the connection.

  Recommended action if a person is to reconfigure the interface or device across the interface, ignore this message. However, if no one manipulates the interface or device at the other end of the interface, it is likely that the Ethernet transceiver at one end of the link is faulty and must be replaced.

• How to find an IP address of polling of a L2 switch?

  Here's a good one. I need to find the IP address of the election a L2 (3560V2) switch in my network. I will describe in my network in question.

  There are several leading edge devices connected to a switch L2 (3560v2). Links rising L2 switch to a central office switch (4506).

  I have the IP address and MAC with an edge device as well as polling the switch IP address.

  Yet once, I just need to find the IP address of polling of the L2 switch.

  I tried to run Tracert in the edge device but tracert does not show the jump of L2 switch.

  Any ideas?

  Bob

  Again, I simply need to find the polling IP address of the L2 switch.

  You mean you want to see the IP address of the 3650 management switch?  What you get when you run the command ' sh cdp neighbor detail "of the 4500?