2960_ Port Issue

[soofiahtesham]

Hello All,

I have a very simple and a weird issue. I have a 2960  which I am using as a unmanageable switch. So a month back I assigned port # 5 on the switch to one of the windows server. Everything was working fine until all of sudden it stopped working. The peculiar thing is that I plugged in to the port# 6 on the same switch and it worked  without any issue until after a while, it also failed again.

Now if I use the #7 on the same switch it works but it will not work on port#5.While I was  troubleshooting I did shut and no shut, that fixed the issue on the port #6. But when I try to do the same on port#5, I am even unable to ping to the default gateway. One more thing I also did a default command on the port#5 and it seems like it is still not working . Finally the physical connection seems to be fine as well

Issue :  I cant ping the default gateway from port 5#

Please see below the running config

version 12.2
no service pad
service timestamps debug uptime
service timestamps log uptime
service password-encryption
!
hostname XXXXXXX

!
enable secret 5 $1$4.Qt$4fzaWc/R3WvAHYJSyYb3p/
enable password 7 0210505C0F1E1D62657D28
!
no aaa new-model
system mtu routing 1500
ip subnet-zero
!
!
!
!
no file verify auto
spanning-tree mode pvst
spanning-tree extend system-id
!
vlan internal allocation policy ascending
!
interface GigabitEthernet0/1
description ***XXXXXX***
!
interface GigabitEthernet0/2
description ****XXXXXXXXX***
!
interface GigabitEthernet0/3
description ****XXXXXXXXXXX***
!
interface GigabitEthernet0/4
description ***XXXXXXXXX***
!
interface GigabitEthernet0/5
!
interface GigabitEthernet0/6

description ***XXXXXXXXX***

!
interface GigabitEthernet0/7
shutdown
!
interface GigabitEthernet0/8
shutdown
!
interface Vlan1
no ip address
no ip route-cache
!
ip http server
!
control-plane
!
!
line con 0
password XXXXXXXXXXXXXXXXXXXXXXXX
login
line vty 0 4
password XXXXXXXXXXXXXXXXXXXXX
login
line vty 5 15
password XXXXXXXXXXXXXXXXX

login
!
end

Thanks in advance

Soofi

[Leo Laohoo]

Everything was working fine until all of sudden it stopped working. The peculiar thing is that I plugged in to the port# 6 on the same switch and it worked  without any issue until after a while, it also failed again.

The config you've posted is not enough.  Can you post the following commands:

1.  sh logs;

2.  sh version;

3.  sh interface status error

I am suspecting the port may have gone into error-disable.

[soofiahtesham]

sh version
Cisco IOS Software, C2960 Software (C2960-LANBASE-M), Version 12.2(35)SE5, RELEASE SOFTWARE (fc1)
Copyright (c) 1986-2007 by Cisco Systems, Inc.
Compiled Thu 19-Jul-07 20:06 by nachen
Image text-base: 0x00003000, data-base: 0x00D40000

ROM: Bootstrap program is C2960 boot loader
BOOTLDR: C2960 Boot Loader (C2960-HBOOT-M) Version 12.2(35r)SE2, RELEASE SOFTWARE (fc1)

RICHFORTR uptime is 1 year, 13 weeks, 6 days, 1 hour, 18 minutes
System returned to ROM by power-on
System image file is "flash:c2960-lanbase-mz.122-35.SE5/c2960-lanbase-mz.122-35.SE5.bin"

cisco WS-C2960G-8TC-L (PowerPC405) processor (revision A0) with 61440K/4088K bytes of memory.
Processor board ID FOC1212U4MB
Last reset from power-on
1 Virtual Ethernet interface
8 Gigabit Ethernet interfaces
The password-recovery mechanism is enabled.

64K bytes of flash-simulated non-volatile configuration memory.
Base ethernet MAC Address       : 00:21:1B:43:81:80
Motherboard assembly number     : 73-10613-08
Power supply part number        : 341-0208-01
Motherboard serial number       : FOC12123DXJ
Power supply serial number      : LIT12090BZC
Model revision number           : A0
Motherboard revision number     : B0
Model number                    : WS-C2960G-8TC-L
System serial number            : FOC1212U4MB
Top Assembly Part Number        : 800-28133-01
Top Assembly Revision Number    : D0
Version ID                      : V01
CLEI Code Number                : COM7S00ARA
Hardware Board Revision Number  : 0x01

Switch   Ports  Model              SW Version              SW Image           
------   -----  -----              ----------              ----------         
*    1   8      WS-C2960G-8TC-L    12.2(35)SE5             C2960-LANBASE-M   

Configuration register is 0xF
--------------------------------------------------------------------------------------------------------  ----------------------------

sh log
Syslog logging: enabled (0 messages dropped, 1 messages rate-limited, 0 flushes, 0 overruns, xml disabled, filtering disabled)
    Console logging: level debugging, 490 messages logged, xml disabled,
                     filtering disabled
    Monitor logging: level debugging, 0 messages logged, xml disabled,
                     filtering disabled
    Buffer logging: level debugging, 490 messages logged, xml disabled,
                    filtering disabled
    Exception Logging: size (4096 bytes)
    Count and timestamp logging messages: disabled
    File logging: disabled
    Trap logging: level informational, 493 message lines logged

Log Buffer (4096 bytes):
LINK-5-CHANGED: Interface GigabitEthernet0/5, changed state to administratively down
1y13w: %SYS-5-CONFIG_I: Configured from console by console
1y13w: %LINK-5-CHANGED: Interface GigabitEthernet0/6, changed state to administratively down
1y13w: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/6, changed state to down
1y13w: %LINK-3-UPDOWN: Interface GigabitEthernet0/7, changed state to down
1y13w: %LINK-3-UPDOWN: Interface GigabitEthernet0/7, changed state to up
1y13w: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/7, changed state to up
1y13w: %SYS-5-CONFIG_I: Configured from console by console
1y13w: %LINK-5-CHANGED: Interface GigabitEthernet0/7, changed state to administratively down
1y13w: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/7, changed state to down
1y13w: %SYS-5-CONFIG_I: Configured from console by console
1y13w: %CLEAR-5-COUNTERS: Clear counter on interface GigabitEthernet0/5 by console
1y13w: %LINK-3-UPDOWN: Interface GigabitEthernet0/5, changed state to down
1y13w: %LINK-3-UPDOWN: Interface GigabitEthernet0/5, changed state to up
1y13w: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/5, changed state to up
1y13w: %SYS-5-CONFIG_I: Configured from console by console
1y13w: %SYS-5-CONFIG_I: Configured from console by console
1y13w: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/5, changed state to down
1y13w: %LINK-3-UPDOWN: Interface GigabitEthernet0/5, changed state to down
1y13w: %SYS-5-CONFIG_I: Configured from console by console
1y13w: %LINK-3-UPDOWN: Interface GigabitEthernet0/5, changed state to up
1y13w: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/5, changed state to up
1y13w: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/5, changed state to down
1y13w: %LINK-3-UPDOWN: Interface GigabitEthernet0/5, changed state to down
1y13w: %LINK-3-UPDOWN: Interface GigabitEthernet0/5, changed state to up
1y13w: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/5, changed state to up
1y13w: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/5, changed state to down
1y13w: %LINK-3-UPDOWN: Interface GigabitEthernet0/5, changed state to down
1y13w: %LINK-3-UPDOWN: Interface GigabitEthernet0/5, changed state to up
1y13w: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/5, changed state to up
1y13w: %SYS-5-CONFIG_I: Configured from console by console
1y13w: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/5, changed state to down
1y13w: %LINK-3-UPDOWN: Interface GigabitEthernet0/5, changed state to down
1y13w: %LINK-3-UPDOWN: Interface GigabitEthernet0/5, changed state to up
1y13w: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/5, changed state to up
1y13w: %SYS-5-CONFIG_I: Configured from console by console
1y13w: %LINK-5-CHANGED: Interface GigabitEthernet0/5, changed state to administratively down
1y13w: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/5, changed state to down
1y13w: %SYS-5-CONFIG_I: Configured from console by console
1y13w: %LINK-3-UPDOWN: Interface GigabitEthernet0/5, changed state to down
1y13w: %LINK-3-UPDOWN: Interface GigabitEthernet0/5, changed state to up
1y13w: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/5, changed state to up
1y13w: %SYS-5-CONFIG_I: Configured from console by console
1y13w: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/5, changed state to down
1y13w: %LINK-3-UPDOWN: Interface GigabitEthernet0/5, changed state to down
1y13w: %LINK-3-UPDOWN: Interface GigabitEthernet0/5, changed state to up
1y13w: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/5, changed state to up
1y13w: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/5, changed state to down
1y13w: %LINK-3-UPDOWN: Interface GigabitEthernet0/5, changed state to down
1y13w: %LINK-3-UPDOWN: Interface GigabitEthernet0/5, changed state to up
1y13w: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/5, changed state to up

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

The sh interface status error is not a valid command

Thanks for the help

Soofi

[f.janusas]

please also post the results of 'sh errdisable recovery'

[soofiahtesham]

'sh errdisable recovery' didnt work it said invalid command.  So I tried  "  sh interface status err-disabled " and it came out blank.

[f.janusas]

Well you can start by checking the status of the ports you mentioned by running sh int gigabitethernet "portumber"

You can also try enabling error recovery by running, please also make sure your in "conf t" before running the commands

errdisable recovery interval 300

errdisable recovery cause all

then run the sh erdisable recovery and you should see a result such as:

ErrDisable Reason    Timer Status
-----------------    --------------
udld                 Enabled
bpduguard            Enabled
security-violatio    Enabled
channel-misconfig    Enabled
pagp-flap            Enabled
dtp-flap             Enabled
link-flap            Enabled
l2ptguard            Enabled
psecure-violation    Enabled
gbic-invalid         Enabled
dhcp-rate-limit      Enabled
mac-limit            Enabled
unicast-flood        Enabled
arp-inspection       Enabled

Timer interval: 300 seconds

Interfaces that will be enabled at the next timeout:

Interface      Errdisable reason      Time left(sec)
---------    ---------------------    --------------
  Fa2/4                bpduguard          273

Also sounds like it might be a possible link flap issue.

also might want to check your link speed settings on the nicin your server,...

Hope this helps...

[soofiahtesham]

Thanks for input.

I tried the steps you have suggested, please see below for the output. Also, as stated earlier the port in question is not connected to a windows server. But it is been conencted to a linksys home router 4 port + 1 port ( WAN ) .

Also, The other test I did was manually assigned a static IP to a laptop and tried pining the gateway. It still didnt work, So I am speculating that the issue is with the  2960 swicth and not on the other side.

GigabitEthernet0/5 is up, line protocol is up (connected)
  Hardware is Gigabit Ethernet, address is 0021.1b43.8185 (bia 0021.1b43.8185)
  MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation ARPA, loopback not set
  Keepalive set (10 sec)
  Full-duplex, 100Mb/s, media type is 10/100/1000BaseTX
  input flow-control is off, output flow-control is unsupported
  ARP type: ARPA, ARP Timeout 04:00:00
  Last input never, output 00:00:00, output hang never
  Last clearing of "show interface" counters 3d18h
  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
  Queueing strategy: fifo
  Output queue: 0/40 (size/max)
  5 minute input rate 0 bits/sec, 0 packets/sec
  5 minute output rate 0 bits/sec, 0 packets/sec
     353144 packets input, 22783502 bytes, 0 no buffer
     Received 353144 broadcasts (0 multicasts)
     0 runts, 0 giants, 0 throttles
     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
     0 watchdog, 8924 multicast, 0 pause input
     0 input packets with dribble condition detected
     219853 packets output, 16094422 bytes, 0 underruns

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

RICHFORTR#sh errdisable recovery
ErrDisable Reason    Timer Status
-----------------    --------------
udld                 Disabled
bpduguard            Disabled
security-violatio    Disabled
channel-misconfig    Disabled
vmps                 Disabled
pagp-flap            Disabled
dtp-flap             Disabled
link-flap            Disabled
psecure-violation    Disabled
sfp-config-mismat    Disabled
gbic-invalid         Disabled
dhcp-rate-limit      Disabled
unicast-flood        Disabled
storm-control        Disabled
arp-inspection       Disabled
loopback             Disabled

Timer interval: 300 seconds

Interfaces that will be enabled at the next timeout:

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

sh errdisable detect
ErrDisable Reason    Detection status
-----------------    ----------------
udld                 Enabled
bpduguard            Enabled
security-violatio    Enabled
channel-misconfig    Enabled
psecure-violation    Enabled
unicast-flood        Enabled
vmps                 Enabled
loopback             Enabled
unicast-flood        Enabled
pagp-flap            Enabled
dtp-flap             Enabled
link-flap            Enabled
sfp-config-mismat    Enabled
gbic-invalid         Enabled
dhcp-rate-limit      Enabled
storm-control        Enabled
arp-inspection       Enabled
community-limit      Enabled
invalid-policy       Enabled

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

RICHFORTR#sh errdisable flap-values
ErrDisable Reason    Flaps    Time (sec)
-----------------    ------   ----------
pagp-flap              3       30
dtp-flap               3       30
link-flap              5       10

Thanks,

Soofi

[Leo Laohoo]

If you look at your "sh logs" interface 5 is flapping like no tomorrow.  Have you checked the cable?  Unfortunately, I would like to recommend you enable the TDR feature of the 2960.  It's unfortunate because you are running a fairly old IOS and using the TDR will bring the line down .... but then again, the link is already flapping, so why not?

The combo commands are the following:

test cable tdr interface gi 0/5

wait for approximately 7-10 seconds and follow up with the final command of:

sh cable tdr interface gi0/5

[soofiahtesham]

Thanks Leo, for the response here is the output from the command. And yes the link was down and came back up.

sh cable tdr interface gi0/5
TDR test last run on: June 06 22:48:36

Interface Speed Local pair Pair length        Remote pair Pair status
--------- ----- ---------- ------------------ ----------- --------------------
Gi0/5     100M  Pair A     N/A                Pair A      Normal
                Pair B     N/A                Pair B      Normal
                Pair C     20   +/- 2  meters Pair C      Short
                Pair D     20   +/- 2  meters Pair D      Short

[Leo Laohoo]

Gi0/5     100M  Pair A     N/A                Pair A      Normal
                         Pair B     N/A                Pair B      Normal
                         Pair C     20   +/- 2  meters Pair C      Short
                         Pair D     20   +/- 2  meters Pair D      Short

You may have just solved your issue.  The cable could be faulty.  Is this a single cable from the switch to the NIC?  Replace it.  It's terminated incorrectly in all four pairs.

[soofiahtesham]

Nope! That didnt fixed the issue . Even after replacing the cable the issue continues and I did ran same command here is the output

Interface Speed Local pair Pair length        Remote pair Pair status
--------- ----- ---------- ------------------ ----------- --------------------
Gi0/5     100M  Pair A     N/A                Pair B      Normal
                Pair B     N/A                Pair A      Normal
                Pair C     28   +/- 2  meters Pair D      Short
                Pair D     20   +/- 2  meters Pair C      Short

Is this a single cable from the switch to the NIC?

No, it is connecting to a  ( 5port ) linksys home router.

[Leo Laohoo]

I did ran same command here is the output

Did you ran both commands or just the "show" command?

No, it is connecting to a  ( 5port ) linksys home router.

So it's SWITCH < --- cable --- > Router?  Is this it?

[soofiahtesham]

Did you ran both commands or just the "show" command?

No, I ran both the commands.

So it's SWITCH < --- cable --- > Router?  Is this it?

Yes

Also, I think the output from  sh log posted on the previous thread  was heading us into wrong direction. The reason I say that is because once I cleared the log buffer. and ran sh log, ( please see below the output )

sh log
Syslog logging: enabled (0 messages dropped, 1 messages rate-limited, 0 flushes,
0 overruns, xml disabled, filtering disabled)
    Console logging: level debugging, 502 messages logged, xml disabled,
                     filtering disabled
    Monitor logging: level debugging, 0 messages logged, xml disabled,
                     filtering disabled
    Buffer logging: level debugging, 502 messages logged, xml disabled,
                    filtering disabled
    Exception Logging: size (4096 bytes)
    Count and timestamp logging messages: disabled
    File logging: disabled
    Trap logging: level informational, 505 message lines logged

Log Buffer (4096 bytes):