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Cisco 3750 Probelm with interfaces

Hi

I have 3 cisco 3750's in stack and operating at Layer 2. all the switch interfaces are on the same vlan. On switch 1 the computers that are connected to interfaces 13,14,15,16 cannot logon to the domain it says that the domain is not vailable. But when i Login locally on the PC i get the IP address for the PCs (After 20 sec) and i can ping the other network devices but i cannot access any shared resources. I do not have any ACLs on my VLANs. The problem is only with the above 4 interfaces the other interfaces are working fine, i cannot see any errors on the interface but i cannot understand where the problem is

Any help would be very much appritiated.
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kiranvvkk
Asked:
kiranvvkk
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1 Solution
 
rexxusCommented:
Are you able to move the patching from one of the PC's to a port that is known to work?  Have you tried different patch leads.

Only other thing I would suggest without more information would be to see if "spanning-tree portfast" is enabled on the interfaces that work and not enabled on the interfaces you're experiencing problems with.

To enable it:

conf t
int gig x/x/13
spanning-tree portfasdt

int gig x/x/14
spanning-tree portfast

int gig x/x/15
spanning-tree portfast

int gig x/x/16
spanning-tree portfast
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kiranvvkkAuthor Commented:
Thanks for the reply

I connected the PC to a differnt port it works fine and i have spanning-tree portfast enabled on the interfaces.

Kiran
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CaoilteCommented:
Is there any proxy arp going on anywhere ??  Is it possible to post the config of a "working" and a "non-working" port?
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kiranvvkkAuthor Commented:
I dont know about proxy ARP how would i find out

Working port config and the Not working port config are the same

Working port config

Current configuration : 334 bytes
!
interface GigabitEthernet1/0/12
 switchport access vlan 24
 switchport voice vlan 225
 speed 100
 srr-queue bandwidth share 10 10 60 20
 srr-queue bandwidth shape  10  0  0  0
 queue-set 2
 mls qos trust device cisco-phone
 mls qos trust cos
 auto qos voip cisco-phone
 spanning-tree portfast
 spanning-tree bpduguard enable
end


GigabitEthernet1/0/12 is up, line protocol is up (connected)
  Hardware is Gigabit Ethernet, address is 0018.186e.578c (bia 0018.186e.578c)
  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 never
  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 11000 bits/sec, 14 packets/sec
  5 minute output rate 371000 bits/sec, 41 packets/sec
     492768 packets input, 132502757 bytes, 0 no buffer
     Received 53355 broadcasts (0 multicast)
     0 runts, 0 giants, 0 throttles
     1 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
     0 watchdog, 42922 multicast, 0 pause input
     0 input packets with dribble condition detected
     2357856 packets output, 375210719 bytes, 0 underruns
     0 output errors, 0 collisions, 1 interface resets
     0 babbles, 0 late collision, 0 deferred
     0 lost carrier, 0 no carrier, 0 PAUSE output
     0 output buffer failures, 0 output buffers swapped out


Not working port config

Current configuration : 334 bytes
!
interface GigabitEthernet1/0/14
 switchport access vlan 24
 switchport voice vlan 225
 speed 100
 srr-queue bandwidth share 10 10 60 20
 srr-queue bandwidth shape  10  0  0  0
 queue-set 2
 mls qos trust device cisco-phone
 mls qos trust cos
 auto qos voip cisco-phone
 spanning-tree portfast
 spanning-tree bpduguard enable
end


GigabitEthernet1/0/16 is up, line protocol is up (connected)
  Hardware is Gigabit Ethernet, address is 0018.186e.5790 (bia 0018.186e.5790)
  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 never
  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 2000 bits/sec, 2 packets/sec
     487566 packets input, 78436529 bytes, 0 no buffer
     Received 100713 broadcasts (0 multicast)
     0 runts, 0 giants, 0 throttles
     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
     0 watchdog, 19834 multicast, 0 pause input
     0 input packets with dribble condition detected
     1713994 packets output, 162708233 bytes, 0 underruns
     0 output errors, 0 collisions, 3 interface resets
     0 babbles, 0 late collision, 0 deferred
     0 lost carrier, 0 no carrier, 0 PAUSE output
     0 output buffer failures, 0 output buffers swapped out
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CaoilteCommented:
As you say there is little there to give a clue.

If you move these 4 ports to other ports do they work as expected ?

One thing that these ports have in common is an ASIC that controls them but that would be a long shot.  Does anything show up in the Sh Env or Sh Post ?
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kiranvvkkAuthor Commented:
Thanks for the reply

The computers work fine when i move to other ports on the same switch.
Nothing strange shows up on the sh env or sh post

COB-H112A-3750-01#sh env all
FAN is OK
TEMPERATURE is OK
Temperature Value: 39 Degree Celsius
Temperature State: GREEN
Yellow Threshold : 51 Degree Celsius
Red Threshold    : 61 Degree Celsius
POWER is OK
RPS is NOT PRESENT

COB-H112A-3750-01#sh post
COB-H112A-3750-01#sh post
Stored system POST messages:

Switch 1
---------

POST: CPU MIC register Tests : Begin
POST: CPU MIC register Tests : End, Status Passed

POST: PortASIC Memory Tests : Begin
POST: PortASIC Memory Tests : End, Status Passed

POST: CPU MIC PortASIC interface Loopback Tests : Begin
POST: CPU MIC PortASIC interface Loopback Tests : End, Status Passed

POST: PortASIC RingLoopback Tests : Begin
POST: PortASIC RingLoopback Tests : End, Status Passed

POST: PortASIC CAM Subsystem Tests : Begin
POST: PortASIC CAM Subsystem Tests : End, Status Passed

POST: PortASIC Stack Port Loopback Tests : Begin
POST: PortASIC Stack Port Loopback Tests : End, Status Passed

POST: PortASIC Port Loopback Tests : Begin
POST: PortASIC Port Loopback Tests : End, Status Passed

Switch 2
---------

POST: CPU MIC register Tests : Begin
POST: CPU MIC register Tests : End, Status Passed

POST: PortASIC Memory Tests : Begin
POST: PortASIC Memory Tests : End, Status Passed

POST: CPU MIC PortASIC interface Loopback Tests : Begin
POST: CPU MIC PortASIC interface Loopback Tests : End, Status Passed

POST: PortASIC RingLoopback Tests : Begin
POST: PortASIC RingLoopback Tests : End, Status Passed

POST: PortASIC CAM Subsystem Tests : Begin
POST: PortASIC CAM Subsystem Tests : End, Status Passed

POST: PortASIC Stack Port Loopback Tests : Begin
POST: PortASIC Stack Port Loopback Tests : End, Status Passed

POST: PortASIC Port Loopback Tests : Begin
POST: PortASIC Port Loopback Tests : End, Status Passed

Switch 3
---------

POST: CPU MIC register Tests : Begin
POST: CPU MIC register Tests : End, Status Passed

POST: PortASIC Memory Tests : Begin
POST: PortASIC Memory Tests : End, Status Passed

POST: CPU MIC PortASIC interface Loopback Tests : Begin
POST: CPU MIC PortASIC interface Loopback Tests : End, Status Passed

POST: PortASIC RingLoopback Tests : Begin
POST: PortASIC RingLoopback Tests : End, Status Passed

POST: PortASIC CAM Subsystem Tests : Begin
POST: PortASIC CAM Subsystem Tests : End, Status Passed

POST: PortASIC Stack Port Loopback Tests : Begin
POST: PortASIC Stack Port Loopback Tests : End, Status Passed

POST: PortASIC Port Loopback Tests : Begin
POST: PortASIC Port Loopback Tests : End, Status Passed

COB-H112A-3750-01#
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CaoilteCommented:
If they work fine in other ports and it's a bank of 4 that's the problem it is looking more like a hardware fault.  Admittedly a very odd one given the behaviour but probably worth a call to your support co. at this stage....
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rexxusCommented:
A long short as I'm inclined to think hardware problem as well, but

- if you set both the PC's and the ports to auto speed/duplex negotiation does anything change?
- does shutting down the port and no shutting the port do anything?
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kiranvvkkAuthor Commented:
I tried changing the speed to auto on both the PC and on the switch no luck, same result with shut and no shut.
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CaoilteCommented:
At this stage I think you need to look at RMA'ing the unit....
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rexxusCommented:
Guess the last test you could perform, which may assist with the RMA, would be to move a working PC to that port and see if you still have the problem.

If you do than as mentioned the best bet would be to swap the switch out (RMA, spares etc)
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