Show arp issue in 2960X

Hi All,
Our office network setup is ISP-------ASA---------3750---------2960X (stack by 4)-----------wired users
Recently, I use command "show arp" in 2960X, the output as below,
In arp table, I can't see wired PC mac address, and also I do a test at last,
I filter my PC using my wired PC IP address (10.27.82.72), but no result in output.
I just want to know what reason cause this issue?
What should I to do that can solve this problem?
Thanks in advance,
swt001#sh arp
Protocol  Address          Age (min)  Hardware Addr   Type   Interface
Internet  10.25.2.222           172   0017.e048.de41  ARPA   Vlan48
Internet  10.25.3.200           160   0017.e048.de41  ARPA   Vlan48
Internet  10.25.31.25           236   0017.e048.de41  ARPA   Vlan48
Internet  10.25.47.33           131   0017.e048.de41  ARPA   Vlan48
Internet  10.25.48.50           256   0017.e048.de41  ARPA   Vlan48
Internet  10.25.48.51           163   0017.e048.de41  ARPA   Vlan48
Internet  10.27.36.101           46   0017.e048.de41  ARPA   Vlan48
Internet  10.27.47.25           162   0017.e048.de41  ARPA   Vlan48
Internet  10.27.82.5            236   0017.e048.de41  ARPA   Vlan48
Internet  10.27.82.8            221   0017.e048.de41  ARPA   Vlan48
Internet  10.27.82.15            30   0017.e048.de41  ARPA   Vlan48
Internet  10.27.82.20           191   0017.e048.de41  ARPA   Vlan48
Internet  10.27.82.21           209   0017.e048.de41  ARPA   Vlan48
Internet  10.27.82.24           212   0017.e048.de41  ARPA   Vlan48
Internet  10.27.82.37           128   0017.e048.de41  ARPA   Vlan48
Internet  10.27.82.43           140   0017.e048.de41  ARPA   Vlan48
Internet  10.27.82.49           186   0017.e048.de41  ARPA   Vlan48
Internet  10.27.82.61            12   0017.e048.de41  ARPA   Vlan48
Internet  10.27.82.63           229   0017.e048.de41  ARPA   Vlan48
Internet  10.27.82.64            22   0017.e048.de41  ARPA   Vlan48
Internet  10.27.82.69           245   0017.e048.de41  ARPA   Vlan48
Internet  10.27.82.75            63   0017.e048.de41  ARPA   Vlan48
Internet  10.27.82.91            80   0017.e048.de41  ARPA   Vlan48
Internet  10.27.82.203          178   0017.e048.de41  ARPA   Vlan48
Internet  10.27.95.61             -   2834.a26d.62c1  ARPA   Vlan48
Internet  192.168.1.1             -   2834.a26d.62c2  ARPA   Vlan99
swt001#
swt001#sh arp | in 10.27.82.72
swt001#

Tracing a MAC address is fairly straight forward.
#show mac-address-table 0017.e048.de41
It may also be 
#show mac address-table 0017.e048.de41
This will list the Outgoing interface that the switch will use to forward frames destined for that MAC address. It does not automatically mean that interface HAS that MAC because it could be a trunk port.
If the outgoing interface turns out to be a Trunk port, logon to the switch connected to that link and check its MAC table in the same way. Keep going until you reach the interface which has the MAC address you are looking for. It could be a virtual interface on a Switch/Router (SVI or Loopback), a Layer 3 address on a Router (i.e one with an IP address) or a normal host port.
Hope that helps

Similar Messages

  • ARP issues with 3750X & 2960X Stack

    Unable to consistently ping a device from the 3750x that is connected to a vlan on the 2960x stack (po1 between 3750x and 2960x).  ARP statements appear normally in 3750x, where the interface vlan resides.  The device is pingable from through the 3750x, but not from the 3750x, even when specifying the Vlan Interface as the source.
    Thanks for the help.

    Connected device, then power cycled, then pinged:
    lrs3750x-admin#ping 172.18.3.17             
    Type escape sequence to abort.
    Sending 5, 100-byte ICMP Echos to 172.18.3.17, timeout is 2 seconds:
    Success rate is 100 percent (5/5), round-trip min/avg/max = 1/7/34 ms
    lrs3750x-admin#
    Then, spiked the interface, because dot1x was lacking logs and not behaving properly:
    lrs3750x-admin#      show arp | in 172.18.3.17          
    Internet  172.18.3.17             0   Incomplete      ARPA
    lrs3750x-admin#ping 172.18.3.17
    Type escape sequence to abort.
    Sending 5, 100-byte ICMP Echos to 172.18.3.17, timeout is 2 seconds:
    Clear arp no longer fixes the issue for the device.
    Thanks!

  • ARP issue on Cisco Switch

    Hello everyone
    We are having some strange arp issues in one vlan. Suddenly, some devices (not all of them) from vlan 1 are not able to ping vlan 2. Interface vlans are located on different switches and I have to manually clear arp in vlan 1 to make computers ping each other between vlans.
    We have set arp timeout command in vlan 1 but it does not help until I manually clear it
    What can be the reason?
    Thank you

    Hmm, have you:
    1. Configured Root guard on all of your root bridge's ports?
    2. Confirmed that ports set at portfast have pbduguard enabled
    3. Use show and debug commands to make sure that TCNs are not happening for the affected VLANs
    4. What model switches do you have and what is the version of code are they are running
    Thank you for rating helpful posts!

  • Why Zinio doesn't show all issues on iPhone 4 but works correctly on ipad?

    Why Zinio doesn't show all issues on iPhone 4 but works correctly on ipad?
    The same issue is not present on iPhone 4 but exists on iPad
    Can anyone help?

    Try http://www.lemkesoft.com/ GraphicConverter.

  • I have installed mackeeper on my iMac and ia show 1945 issues, is subscibing to mackeeper the only way to get rid of these issues

    I have installed Mackeeper on my iMac an it shows 1945 issues, and they have used 700+ GB of hard drive space, is subscribing to Mackeeper the only way to get rid of these issues?

    Those are not real issues. I tested the MacKeeper trial on a freshly-installed OS X 10.8.2 system, with absolutely nothing added to it, and it identified almost as many "junk files." They're not really junk, you're being scammed to convince you to pay the money to buy the program so you can "fix" the "problem." There have been many reports that allowing MacKeeper to "clean up" your system can actually destroy it, requiring reinstallation.
    MacKeeper is to be avoided at all cost. For more information, see Beware MacKeeper. Remove it according to the instructions here:
    http://applehelpwriter.com/2011/09/21/how-to-uninstall-mackeeper-malware/

  • Experincing issues with 2960X switch

    Hi there.
    We are experincing issues with 2960X switch losing the ability to recognise the modules that are inserted in SFP ports.
    Initially, the modules are recognised, usable and will happily participate in cross-stack etherchannels. However, after a period of time -  and this ranges from a couple of hours to a few days, the links go down on the 2960X-side but are still registered as up on at the other end of the etherchannel.
    2960X stack  1      Po1(SD)         LACP      Gi3/0/49(D) Gi3/0/51(D)
    3750G stack  2      Po2(SD)         LACP      Gi1/0/23(I) Gi2/0/22(I)
    When the link fails, the member switch loses the ability to identify modules inserted - it knows they are there, but it cannot identify them. Having a look at the controller for one of them and it's having trouble,see below:-
    sh controllers ethernet-controller gi3/0/49 phy detail
    GigabitEthernet3/0/49 (gpn: 457, port-number: 49)
    hulc_sfp_iic_intf_read_eeprom sfp _index 0 yeti_iic_read_retry fail
    hulc_sfp_iic_intf_read_eeprom sfp _index 0 yeti_iic_read_retry fail
    hulc_sfp_iic_intf_read_eeprom sfp _index 0 yeti_iic_read_retry fail
    A 'sh int' gives:-
    Auto-duplex, Auto-speed, link type is auto, media type is unknown.
    Reboot the stack or just the member and everything resets and works again - for a period of time. I've swapped from compatible to Cisco-brand modules inbetween restarts and it doesn't prevent the issue reoccuring.
    The slots all fail at the same time and once they're in the error state, that switch has to be restarted before it will recongnise anything inserted in any slot.
    I have this issue on two seperate stacks in two different sites. We're running 15.0(2)EX4.
    Has anyone seen anything like this? Particularly interested in this which I've seen using the sh controllers cmd and on the console once after a reboot. hulc_sfp_iic_intf_read_eeprom sfp _index 0 yeti_iic_read_retry fail
    Any thoughts would be greatly appreciated.
    Aid

    Hi Team
    We happen case GLC-T with Catalyst 2960 Hang , It can't work 
    We was reload switch but same ( GLC-T with Catalyst 2960 Hang)
    and use command bellow  
    Switch97#
    Switch97#
    Switch97#sh int gi 1/0/26 transceiver 5 transceiver de
    Switch97#sh int gi 1/0/25 transceiver detail 
    hulc_sfp_iic_intf_read_eeprom sfp _index 0 yeti_iic_read_retry fail
    hulc_sfp_iic_intf_read_eeprom sfp _index 0 yeti_iic_read_retry fail
    hulc_sfp_iic_intf_read_eeprom sfp _index 0 yeti_iic_read_retry failDiagnostic Monitoring is not implemented.
    Switch97#
    Switch97#
    Switch97#sh int gi 1/0/25 transceiver detail 6 transceiver        de
    Switch97#sh int gi 1/0/26 transceiver detail 
    hulc_sfp_iic_intf_read_eeprom sfp _index 1 yeti_iic_read_retry fail
    hulc_sfp_iic_intf_read_eeprom sfp _index 1 yeti_iic_read_retry fail
    hulc_sfp_iic_intf_read_eeprom sfp _index 1 yeti_iic_read_retry failDiagnostic Monitoring is not implemented.
    We try IOS Software EX3, EX4, EX5 and 15-2.2 but can't problem 
    Please suggest case to me

  • FWSM show arp

    Hello,
    when I sent the "show arp" command on an FWSM I get the ARP table. The ARP table contains some strange entries. Is there a way to get a normal arp table without any substitutions (like the arp table on any switch), which contains only the interface, the IP-Address and the MAC?
    The substitutions are not equal with the DNS names of the IP-Addresses.
    I will need this for documentation purposes.
    Example:
    Interface      IP-Address     Mac
    LAN-1          172.17.11.66   00d0.c998.98a5
    LAN-1          172.17.11.27   00d0.c996.e02ee
    LAN-1          Maschine_1     00d0.c9ba.6b8a
    LAN-2          A-172.17.12.10 00d0.c93a.c520
    Thanks in advance.
    Regards,
    Michael

    Hi Michael,
    Thats good
    Well there is no feature or report the names have influence on, its just that, names are used as reference to ip addresses, for eg I can give the ip address of your PC as Michaels_pc and everytime you access any service, I would get the name in the syslog, I can use it in nat or acl commands as well, its just used for naming an ip, but does not affect any traffic or feature on he firewall.
    Thanks,
    Varun

  • DHCP/ARP issue in WLC

    We have an issue where the client PCs are not receiving IP address from DHCP though they get authenticated.  Clients with static IP address don't have any issue.  I get the below DHCP error message from the logs,
    %DHCP-4-INVALID_VLANID_ARP: dhcp_proxy.c:1035 ARP table stores invalid vlan id 0, for the IP Addr 0x85. Expected vlan id for this ip address is 174616833
    And in the ARP table, I see an invalid arp entry for the gateway IP address for a particular VLAN.
    00:0D:BC:2B:76:BF   10.104.113.1     2      0      Host
    While this MAC address should be learned from port 1 and in VLAN 133, it shows as port 2 and VLAN 0.  The ARP entry gets corrected itself when I flush the ARP cache or if I do a ping to the IP from WLC.
    Interface Name                   Port Vlan Id  IP Address      Type    Ap Mgr Guest
    kwe-wireless                     1    133      10.104.113.2    Dynamic No     No
    WLC Model - 4402
    OS Version - 5.1.151.0

    Well just for information purpose, the v5.x is the worst code version out there. Since you have 4400's, I would upgrade to v7.0.x. Makes ire your AP's are compatible by looking at this list.
    http://www.cisco.com/en/US/docs/wireless/controller/5500/tech_notes/Wireless_Software_Compatibility_Matrix.html
    Sent from Cisco Technical Support iPhone App

  • ARP issues

    I have 2 6500 running hsrp over a dot1q trunk on vlan 1. A 3550 is then connected to switch 2 over a LES 100 link which is set up as a trunk at both ends. A 2950 then hangs off the 3550. The issue is that the 2950 can't ping the addresses on the 6500's due to missing arp entries. When sniffing the network I can see the arp requests at the 6500 from the 2950 and then the reply going back across the LES. The physical arp entries are in the 3550 not the stby address. How ever the physical Mac addresses for hsrp on VLAN 1 also has the same entries for other Vlans i.e. Vlan24 on the 3550.
    The Mac address for VLAN 1 ip .250 also is against Vlan 24 ip .61 .
    Can someone please explain this and is there a reason why the 2950 can't get arp entries for 249, 250 and 254.
    Adding static ARP entries does resolve the issue but the customer requires that ARP is learned dynamically.
    There are other devices hanging off the 3550 with the same issues ie Cisco Router and an F5 bigip
    Refer to drawing for information.

    2 things. Your drawing has expired and I cannot download it - could you repost?
    It sounds like a mismatched configuration on one of the trunk ports. Would you be able to post the configs for your trunk ports?
    A couple things to watch/check:
    Did you change the native VLAN? If so make sure it is the same on bothe ends of the trunk.
    Do you have CDP running? If so do CDP neighbors show where you expect to see them?
    On the 2950 and 3550 do a show interface trunk and a
    show interface switchport to make sure everything is configured and operating the same.
    -Mark

  • FIOS ARP Issue

    Hi,
    Is anyone else having the issue with the FIOS ARP sending out requests from 0.0.0.0? I know this has been around a while but it is severely impacting my business.

    ...more input like, what the brand and model of your router is
    ^^^
    If you are the original poster (OP) and your issue is solved, please remember to click the "Solution?" button so that others can more easily find it. If anyone has been helpful to you, please show your appreciation by clicking the "Kudos" button.

  • ARP issue with Cisco 5505

    Hi there,
    We have an issue with our current ASA 5505 set up and I hope someone can help.  Here is the setup
    ISP Handoff -> L2 Switch -> VLAN 1 of ASA
                                          -> VLAN 2 of ASA
    The ISP handoff is a single ethernet cable but the ISP router is acting as the gateway for 2x seperate public address spaces.  ISP cable plugs into a L2 switch.  The two VLANS of the ASA are then plugged into the same switch, one VLAN configured for public space 1 and the other for public space 2, now the issue is when the firewall ARPs for the gateways VLAN2's gateway shows up on VLAN 1 and VLAN 2 which obviously causes issues.

    From your description of the symptoms I would guess that the layer 2 switch has both ASA ports in the same VLAN (which leads me to wonder if the layer 2 switch is doing any VLANs or are all ports in the native VLAN?). Can you provide details of how the layer 2 switch is configured?
    It also would help to know how the ISP is set up. You tell us that it is an Ethernet handoff. But you do not tell us whether the ISP  is handling that as a trunk with multiple VLANs or whether the ISP is treating it as an access port with a single VLAN. Can you clarify this?
    Knowing how the ISP is set up and how the layer 2 switch is configured will be critical in finding a solution that works for your ASA.
    HTH
    Rick

  • Since I upgraded to Lion 10.7.2, my external HD is no longer visible in AirPort utility (in the AirPort disks tab). I also installed the AirPort utility for iOS5, it reported a disk problem, but running Disk Utility on the Mac showed no issues. Help!

    To expand on the question, I have performed the following steps:
    1 - Unplugged external drive (1TB WD MyBook) from the Time Capsule
    2 - Reconnected it. At this point, AirPort utility for iOS5 reported a problem with the disk (Time Capsule light was blinking Orange)
    3 - Unplugged external drive, connected it to MacBook Pro, ran Disk Utility. It found no problems (disk visible straight away on the MacBook Pro).
    4 - Reconnected to Time Capsule - still doesn't show up under the "Disks" option under Air Port utility. Or rather, the hardware is visible (i.e the physical disk) but not the volume.
    5 - I tried another external hard drive, and the volume also doesn't appear in the Disk section under the AirPort utility.
    The WD disk is formatted as Mac OS Extended (Journaled).
    This is a big problem for me, as the drive houses my iTunes library.
    Anyone else had a similar problem? It all worked flawlessly until last week.

    I love computers.
    Have managed to fix this already. Been working the issue for a few days now, and a few minutes after writing the above post I decided to reset the Time Capsule to factory default settings.
    After entering all my details again (used same network names, passwords etc) the Time Capsule was rebooted. When it came back on line - guess what? Yep, the MyBook WD drive is now visibile. I can connect via the network from my other machines to the drive, and iTunes is back.
    So - thought I would post my resolution in case it helps others.

  • Show SQL issue on Posting Date and Aging Date

    Hi Folks,
    When I am running a report >>> the report pops up with the some parmeters >>
    In my scenario u201CAging Dateu201D forumla is calculated as the last day of the every month.
    if month (currentdate) = 1 then date((year(CurrentDate)-1),12,31) else
    date(year(currentdate),month(CurrentDate),1)-1
    Example : if 9( 23 sep 2010 ) = 1 then date ((2010(23 Sep 2010)-1),12,31) else date(2010(23 sep 2010),9( 23 Sep 2010),1)-1.
    Issues :
    For some reports the Aging Date parameter is poping up but for some of the reports the Aging Date forumla is calculating in the behind based on the u201CPost Dateu201D.
    Here is my Record Selection :
    (not isnull({CLARITY_TDL.SERV_AREA_ID}) and {CLARITY_TDL.SERV_AREA_ID}
    in {?Service Area} or 0 in {?Service Area}) and
    (not isnull({CLARITY_DEP.SPECIALTY}) and {CLARITY_DEP.SPECIALTY} in {?Specialty} or {?Specialty} =
    "Specialty(s)" or {?Specialty} = "NONE") and
    (not isnull({CLARITY_TDL.PERFORMING_PROV_ID}) and {CLARITY_TDL.PERFORMING_PROV_ID} in {?Service Provider} or
    {?Service Provider} = "Provider(s)" or {?Service Provider} = "NONE") and
    {CLARITY_TDL.POST_DATE} = {@Aging Date}and
    [color=darkred]{CLARITY_TDL.DETAIL_TYPE} in [60, 61] and
    {CL_EMP_CLARITY.USER_ID} = CurrentCEUserName
    Moreover when I check Show SQL for the where clause
    CLARITY_TDL"."SERV_AREA_ID" IS NOT NULL AND "CLARITY_TDL"."SERV_AREA_ID"=10 AND "CLARITY_TDL"."POST_DATE">={ts '2010-08-31 00:00:00'} AND "CLARITY_TDL"."POST_DATE"<{ts '2010-09-01 00:00:00'})
    AND ("CLARITY_TDL"."DETAIL_TYPE"=60 OR "CLARITY_TDL"."DETAIL_TYPE"=61) AND "CL_EMP_CLARITY"."USER_ID"=''
    I donu2019t know why the post date is going in between the date/time ranges. I am scrating my head to understand the things to work. Please help me out.

    Not sure what you are trying to do here
    (not isnull({CLARITY_TDL.SERV_AREA_ID}) and {CLARITY_TDL.SERV_AREA_ID}
    in {?Service Area} or 0 in {?Service Area}) and
    (not isnull({CLARITY_DEP.SPECIALTY}) and {CLARITY_DEP.SPECIALTY} in {?Specialty} or {?Specialty} =
    "Specialty(s)" or {?Specialty} = "NONE") and
    (not isnull({CLARITY_TDL.PERFORMING_PROV_ID}) and {CLARITY_TDL.PERFORMING_PROV_ID} in {?Service Provider} or
    {?Service Provider} = "Provider(s)" or {?Service Provider} = "NONE") and
    Probably better to right these on these lines
    (If {?Service Area} not equals 0 then not isnull({CLARITY_TDL.SERV_AREA_ID}) and {CLARITY_TDL.SERV_AREA_ID}
    in {?Service Area}  else true) and
    NB Typed not equals as symbols disappear
    This means nothing in SQL and will cause whole clause to be evaluated locally and not on database
    or {?Specialty} =
    "Specialty(s)" or {?Specialty} = "NONE")
    I am not sure what you are trying to do so can not offer an alternative.
    Ian

  • ADF popup is not showing - Intermittent issue

    Guys,
              Once in a while popups inside the adf application are not showing up. have anybody faced this issue?
    Though its rare, i would like to know the reasons behind this intermittent issue.
    Any pointers/thoughts will be appreciated... Thanks

    Popup if very problematic item in ADF.
    There are 2 ways to invoke the popup correctly
    1. Make sure that you don't have a combination of viewScope and backingbean scope in everything related to your popup
    2. Or (and this is the best one) - don't use popup. Create a bounded task flow and call it from your task flow. You have an option to call it as inline popup.

  • TV Show Sync Issue

    Hello,
    I have an new iPad 2 and can't sync TV shows anymore. I already deleted the SC Infor folder and tried everything else. While iTunes seem to sync the movie and iPad shows from a space perspective that the TV Show is on it, it still doesn't show up when I open Videos.
    Please help

    don't know if you want to try this or not.. it's quick and can't really hurt anything... just a stab in the dark kind of.
    wondering if it could be corrupted iTunes Library file.. when i used to have weird issues in the past i rebuilt this file and many went away.
    you can rebuild it by 1) closing iTunes 2) going to your iTunes Folder and deleting the iTunes Library file.. it's an xml file.. you can also just move it on your desktop incase you want to be able get it back... 3) open iTunes again (this will create a new file) and drag the folder containing all your stuff back into the iTunes Window... remember if you have stuff stored outside of the iTunes folder on external drives and don't want them copied to the iTunes Folder to make the appropriate settings in prefs or do the shift+drag thing..
    if want to get back to what you had before you can just place the old iTunes Library file back into the iTunes Folder and you can get back to exactly where you were before..

Maybe you are looking for

  • Uploading a FCP project to iPod

    I'm wanting to put a small FCP project onto my 30G. iPod. Can this be done? If so, how?

  • Once site is up, can clients make changes?

    I'm wondering once Muse is set up and hosted with BC, can a client go in and edit -- as they can do with Word Press? I see there are some changes in Admin panel,  but I don't understand it.  I've read quite a bit online but am missing this aspect. Th

  • Importing java classes ?

    I'm trying to use "Java Embedding" process activity to add a simple java snippet, this code needs a set of classes. I've copied the required jar files to \OraBPELPM_1\integration\jdev\jdev\lib\ext. But I'm not able to figure out where to add the impo

  • Ipcs for semaphores empty?!?!

    Hi all, I'm trying to do up an Operating Systems class assignment which involves the use of semaphores (the Sys V type) using semget(). My code is definitely correct for the creation of a semaphore (in fact I get the -1 error if I try to create the s

  • Internet works, airtunes doesn't!

    I'm connected wirelessly right now through my airport express. I am running the latest version of everything (Tiger, iTunes 6, latest airport software, etc.), yet iTunes refuses to recognize my speakers connected to my AX. My roomate's powerbook reco