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SG 300-28 28-Port Gigabit Managed Switch Issue

Hello All,

We have big problem in our network. Not able to resolve the issue. We are having SG 300-28 28-Port Gigabit Managed Switch connecting to number of unmanaged switches(Please find the network topology attached). Pinging is unstable. We are totally lost now. We doubt that switch does not have the capacity to handle our network. Amazingly, when we are not able to ping the switch, we are able to ping the 2 firewalls(Please check the Topology) and also log into the switch through putty. Internet is working. Kindly need your assistance to resolve the issue.

Thanks in advance.

Here are logs which we have got from the switch:

2147483432    2012-Jan-30 15:25:57    Informational     %AAA-I-CONNECT:  New http connection for user cisco, source 10.0.3.86 destination  10.0.0.3 ACCEPTED

2147483433    2012-Jan-30 15:25:16    Warning     %AAA-W-REJECT: New  console connection for user cisco, source destination REJECTED,  aggregated (1)

2147483434    2012-Jan-30 15:24:48    Warning      %AAA-W-REJECT: New console connection for user cisco, source  destination REJECTED

2147483435    2012-Jan-30 15:23:41    Warning     %AAA-W-REJECT: New  http connection for user cisco, source 10.0.3.86 destination 10.0.0.3  REJECTED, aggregated (3)

2147483436    2012-Jan-30 15:22:47     Warning     %AAA-W-REJECT: New http connection, source 10.0.3.86  destination 10.0.0.3 REJECTED, aggregated (2)

2147483437    2012-Jan-30 15:21:41    Warning     %AAA-W-REJECT: New  http connection, source 10.0.3.86 destination 10.0.0.3 REJECTED

2147483438     2012-Jan-30 15:19:52    Warning     %AAA-W-REJECT: New http connection  for user cisco, source 10.0.3.86 destination 10.0.0.3 REJECTED,  aggregated (4)

2147483439    2012-Jan-30 15:17:20    Warning     %AAA-W-REJECT: New  http connection for user cisco, source 10.0.3.86 destination 10.0.0.3  REJECTED

2147483440    2012-Jan-30 14:40:07    Informational      %AAA-I-DISCONNECT: User CLI session for user cisco over console ,  source destination TERMINATED. The Telnet/SSH session may still be  connected.

2147483441    2012-Jan-30 14:28:05    Informational     %AAA-I-CONNECT:  User CLI session for user cisco over console , source destination  ACCEPTED

2147483442    2012-Jan-30 14:27:51    Warning     %AAA-W-REJECT: New console connection, source destination REJECTED

2147483443    2012-Jan-30 13:37:33    Warning     %STP-W-PORTSTATUS: g5: STP status Forwarding, aggregated (1)

2147483444    2012-Jan-30 13:37:29    Informational     %LINK-I-Up: g5, aggregated (1)

2147483445    2012-Jan-30 13:37:26    Warning     %LINK-W-Down: g5, aggregated (1)

2147483446    2012-Jan-30 13:33:30    Warning     %STP-W-PORTSTATUS: g5: STP status Forwarding

2147483447    2012-Jan-30 13:33:26    Informational     %LINK-I-Up: g5

2147483448    2012-Jan-30 13:33:24    Warning     %LINK-W-Down: g5

2147483449    2012-Jan-30 11:59:54    Warning     %STP-W-PORTSTATUS: g5: STP status Forwarding, aggregated (1)

2147483450    2012-Jan-30 11:59:50    Informational     %LINK-I-Up: g5, aggregated (1)

2147483451    2012-Jan-30 11:59:47    Warning     %LINK-W-Down: g5, aggregated (1)

2147483452    2012-Jan-30 11:56:18    Warning     %STP-W-PORTSTATUS: g5: STP status Forwarding

2147483453    2012-Jan-30 11:56:13    Informational     %LINK-I-Up: g5

2147483454    2012-Jan-30 11:56:12    Warning     %LINK-W-Down: g5

2147483455    2012-Jan-30 10:36:49    Warning     %STP-W-PORTSTATUS: g10: STP status Forwarding, aggregated (2)

2147483456    2012-Jan-30 10:36:45    Informational     %LINK-I-Up: g10, aggregated (2)

2147483457    2012-Jan-30 10:36:42    Warning     %LINK-W-Down: g10, aggregated (2)

2147483458    2012-Jan-30 10:36:15    Warning     %STP-W-PORTSTATUS: g10: STP status Forwarding

2147483459    2012-Jan-30 10:36:11    Informational     %LINK-I-Up: g10

2147483460    2012-Jan-30 10:36:08    Warning     %LINK-W-Down: g10

2147483461    2012-Jan-30 10:19:34    Warning     %STP-W-PORTSTATUS: g2: STP status Forwarding, aggregated (1)

2147483462    2012-Jan-30 10:19:29    Informational     %LINK-I-Up: g2, aggregated (1)

2147483463    2012-Jan-30 10:19:27    Warning     %LINK-W-Down: g2

2147483464    2012-Jan-30 10:19:23    Warning     %STP-W-PORTSTATUS: g2: STP status Forwarding

2147483465    2012-Jan-30 10:19:18    Informational     %LINK-I-Up: g2

2147483466    2012-Jan-30 10:03:33    Warning     %STP-W-PORTSTATUS: g21: STP status Forwarding, aggregated (1)

2147483467    2012-Jan-30 10:03:28    Informational     %LINK-I-Up: g21, aggregated (1)

2147483468    2012-Jan-30 10:03:25    Warning     %LINK-W-Down: g21, aggregated (1)

2147483469    2012-Jan-30 10:02:58    Warning     %STP-W-PORTSTATUS: g21: STP status Forwarding

2147483470    2012-Jan-30 10:02:53    Informational     %LINK-I-Up: g21, aggregated (1)

2147483471    2012-Jan-30 10:02:50    Warning     %LINK-W-Down: g21

2147483472    2012-Jan-30 10:02:50    Informational     %LINK-I-Up: g21

2147483473    2012-Jan-30 09:42:39    Warning     %STP-W-PORTSTATUS: g10: STP status Forwarding, aggregated (1)

2147483474    2012-Jan-30 09:42:35    Informational     %LINK-I-Up: g10, aggregated (1)

2147483475    2012-Jan-30 09:42:32    Warning     %LINK-W-Down: g10

2147483476    2012-Jan-30 09:42:06    Warning     %STP-W-PORTSTATUS: g10: STP status Forwarding

2147483477    2012-Jan-30 09:42:01    Informational     %LINK-I-Up: g10

2147483478    2012-Jan-30 09:29:23    Warning     %STP-W-PORTSTATUS: g5: STP status Forwarding

2147483479    2012-Jan-30 09:29:18    Informational     %LINK-I-Up: g5

2147483480    2012-Jan-30 09:29:16    Warning     %LINK-W-Down: g5

2147483481    2012-Jan-28 09:38:02    Warning     %LINK-W-Down: g2

2147483482    2012-Jan-28 08:53:01    Note     %COPY-N-TRAP: The copy operation was completed successfully

2147483483    2012-Jan-28 08:52:57    Informational     %COPY-I-FILECPY:  Files Copy - source URL flash://startup-config destination URL  flash://mirror-config

2147483484    2012-Jan-27 20:28:16    Warning     %LINK-W-Down: g21

2147483485    2012-Jan-27 18:44:01    Warning     %LINK-W-Down: g11

2147483486    2012-Jan-27 18:17:05    Warning     %STP-W-PORTSTATUS: g21: STP status Forwarding

2147483487    2012-Jan-27 18:17:00    Informational     %LINK-I-Up: g21

2147483488    2012-Jan-27 18:16:47    Warning     %LINK-W-Down: g21

2147483489    2012-Jan-27 18:12:53    Warning     %STP-W-PORTSTATUS: g5: STP status Forwarding

2147483490    2012-Jan-27 18:12:48    Informational     %LINK-I-Up: g5

2147483491    2012-Jan-27 18:12:47    Warning     %LINK-W-Down: g5

2147483492    2012-Jan-27 17:08:12    Warning     %STP-W-PORTSTATUS: g11: STP status Forwarding

2147483493    2012-Jan-27 17:08:08    Informational     %LINK-I-Up: g11

2147483494    2012-Jan-27 16:44:54    Warning     %LINK-W-Down: g25

2147483495    2012-Jan-27 16:35:05    Warning     %LINK-W-Down: g11

2147483496    2012-Jan-27 16:29:01    Warning     %STP-W-PORTSTATUS: g25: STP status Forwarding, aggregated (1)

2147483497    2012-Jan-27 16:28:57    Informational     %LINK-I-Up: g25, aggregated (1)

2147483498    2012-Jan-27 16:28:54    Warning     %LINK-W-Down: g25, aggregated (1)

2147483499    2012-Jan-27 16:28:39    Warning     %STP-W-PORTSTATUS: g25: STP status Forwarding

2147483500    2012-Jan-27 16:28:35    Informational     %LINK-I-Up: g25

2147483501    2012-Jan-27 16:28:32    Warning     %LINK-W-Down: g25

2147483502    2012-Jan-27 16:16:03    Warning     %STP-W-PORTSTATUS: g25: STP status Forwarding

2147483503    2012-Jan-27 16:15:58    Informational     %LINK-I-Up: g25, aggregated (1)

2147483504    2012-Jan-27 16:15:56    Warning     %LINK-W-Down: g25, aggregated (1)

2147483505    2012-Jan-27 16:15:54    Informational     %LINK-I-Up: g25

2147483506    2012-Jan-27 16:15:52    Warning     %LINK-W-Down: g25

2147483507    2012-Jan-27 16:15:14    Warning     %STP-W-PORTSTATUS: g11: STP status Forwarding

2147483508    2012-Jan-27 16:15:10    Informational     %LINK-I-Up: g11

2147483509    2012-Jan-27 16:13:27    Warning     %LINK-W-Down: g11

2147483510    2012-Jan-27 16:09:45    Warning     %LINK-W-Down: g10

2147483511    2012-Jan-27 14:56:57    Warning     %STP-W-PORTSTATUS: g5: STP status Forwarding

2147483512    2012-Jan-27 14:56:53    Informational     %LINK-I-Up: g5

2147483513    2012-Jan-27 14:56:50    Warning     %LINK-W-Down: g5

2147483514    2012-Jan-27 14:17:36    Warning     %STP-W-PORTSTATUS: g5: STP status Forwarding

2147483515    2012-Jan-27 14:17:32    Informational     %LINK-I-Up: g5

2147483516    2012-Jan-27 14:17:30    Warning     %LINK-W-Down: g5

2147483517    2012-Jan-27 13:31:02    Warning     %STP-W-PORTSTATUS: g10: STP status Forwarding, aggregated (2)

2147483518    2012-Jan-27 13:30:58    Informational     %LINK-I-Up: g10, aggregated (2)

2147483519    2012-Jan-27 13:30:55    Warning     %LINK-W-Down: g10, aggregated (2)

2147483520    2012-Jan-27 13:30:32    Warning     %STP-W-PORTSTATUS: g10: STP status Forwarding

2147483521    2012-Jan-27 13:30:27    Informational     %LINK-I-Up: g10

2147483522    2012-Jan-27 13:30:25    Warning     %LINK-W-Down: g10

2147483523    2012-Jan-27 13:22:20    Warning     %STP-W-PORTSTATUS: g10: STP status Forwarding, aggregated (1)

2147483524    2012-Jan-27 13:22:15    Informational     %LINK-I-Up: g10, aggregated (1)

2147483525    2012-Jan-27 13:22:13    Warning     %LINK-W-Down: g10, aggregated (1)

2147483526    2012-Jan-27 13:21:52    Warning     %STP-W-PORTSTATUS: g10: STP status Forwarding

2147483527    2012-Jan-27 13:21:48    Informational     %LINK-I-Up: g10

2147483528    2012-Jan-27 13:21:45    Warning     %LINK-W-Down: g10

2147483529    2012-Jan-27 12:33:56    Warning     %STP-W-PORTSTATUS: g25: STP status Forwarding, aggregated (1)

2147483530    2012-Jan-27 12:33:51    Informational     %LINK-I-Up: g25, aggregated (1)

2147483531    2012-Jan-27 12:33:49    Warning     %LINK-W-Down: g25

2147483532    2012-Jan-27 12:33:34    Warning     %STP-W-PORTSTATUS: g25: STP status Forwarding

2147483533    2012-Jan-27 12:33:30    Informational     %LINK-I-Up: g25

2147483534    2012-Jan-27 12:25:51    Warning     %LINK-W-Down: g25

2147483535    2012-Jan-27 12:02:43    Warning     %STP-W-PORTSTATUS: g25: STP status Forwarding

2147483536    2012-Jan-27 12:02:38    Informational     %LINK-I-Up: g25

2147483537    2012-Jan-27 11:31:58    Warning     %STP-W-PORTSTATUS: g5: STP status Forwarding

2147483538    2012-Jan-27 11:31:54    Informational     %LINK-I-Up: g5

2147483539    2012-Jan-27 11:31:51    Warning     %LINK-W-Down: g5

2147483540    2012-Jan-27 11:23:47    Warning     %STP-W-PORTSTATUS: g11: STP status Forwarding

2147483541    2012-Jan-27 11:23:42    Informational     %LINK-I-Up: g11

2147483542    2012-Jan-27 11:15:08    Warning     %STP-W-PORTSTATUS: g5: STP status Forwarding

2147483543    2012-Jan-27 11:15:04    Informational     %LINK-I-Up: g5

2147483544    2012-Jan-27 11:15:02    Warning     %LINK-W-Down: g5

2147483545    2012-Jan-27 11:03:17    Warning     %STP-W-PORTSTATUS: g6: STP status Forwarding, aggregated (1)

2147483546    2012-Jan-27 11:03:13    Informational     %LINK-I-Up: g6, aggregated (1)

2147483547    2012-Jan-27 11:03:10    Warning     %LINK-W-Down: g6, aggregated (1)

2147483548    2012-Jan-27 11:03:02    Warning     %STP-W-PORTSTATUS: g6: STP status Forwarding

2147483549    2012-Jan-27 11:02:58    Informational     %LINK-I-Up: g6

2147483550    2012-Jan-27 11:02:52    Warning     %LINK-W-Down: g6

2147483551    2012-Jan-27 11:02:51    Note     %IPADTBL-N-IPDUPLICATE:  Duplicate IP address 10.0.0.3 from MAC 4c:80:93:6c:e0:17 was detected on  VLAN 1, port g6

2147483552    2012-Jan-27 10:40:44    Warning     %STP-W-PORTSTATUS: g6: STP status Forwarding

2147483553    2012-Jan-27 10:40:40    Informational     %LINK-I-Up: g6

2147483554    2012-Jan-27 10:40:37    Warning     %LINK-W-Down: g6

2147483555    2012-Jan-27 10:37:30    Warning     %STP-W-PORTSTATUS: g10: STP status Forwarding

2147483556    2012-Jan-27 10:37:25    Informational     %LINK-I-Up: g10

2147483557    2012-Jan-27 10:29:40    Warning     %STP-W-PORTSTATUS: g8: STP status Forwarding, aggregated (1)

2147483558    2012-Jan-27 10:29:35    Informational     %LINK-I-Up: g8, aggregated (1)

2147483559    2012-Jan-27 10:29:33    Warning     %LINK-W-Down: g8, aggregated (1)

2147483560    2012-Jan-27 10:29:24    Warning     %STP-W-PORTSTATUS: g8: STP status Forwarding

2147483561    2012-Jan-27 10:29:20    Informational     %LINK-I-Up: g8

2147483562    2012-Jan-27 10:29:17    Warning     %LINK-W-Down: g8

2147483563    2012-Jan-27 10:27:11    Warning     %STP-W-PORTSTATUS: g15: STP status Forwarding

2147483564    2012-Jan-27 10:27:07    Informational     %LINK-I-Up: g15

2147483565    2012-Jan-27 10:25:58    Warning     %STP-W-PORTSTATUS: g5: STP status Forwarding

2147483566    2012-Jan-27 10:25:54    Informational     %LINK-I-Up: g5

2147483567    2012-Jan-27 10:25:51    Warning     %LINK-W-Down: g5

2147483568    2012-Jan-27 10:20:13    Warning     %STP-W-PORTSTATUS: g8: STP status Forwarding, aggregated (1)

2147483569    2012-Jan-27 10:20:08    Informational     %LINK-I-Up: g8, aggregated (1)

2147483570    2012-Jan-27 10:20:02    Warning     %LINK-W-Down: g8, aggregated (1)

2147483571    2012-Jan-27 10:17:38    Warning     %STP-W-PORTSTATUS: g8: STP status Forwarding

2147483572    2012-Jan-27 10:17:34    Informational     %LINK-I-Up: g8

2147483573    2012-Jan-27 10:17:11    Warning     %LINK-W-Down: g8

2147483574    2012-Jan-27 09:35:10    Warning     %STP-W-PORTSTATUS: g5: STP status Forwarding

2147483575    2012-Jan-27 09:35:05    Informational     %LINK-I-Up: g5, aggregated (1)

2147483576    2012-Jan-27 09:35:04    Warning     %LINK-W-Down: g5

2147483577    2012-Jan-27 09:35:00    Informational     %LINK-I-Up: g5

2147483578    2012-Jan-27 08:55:55    Warning     %STP-W-PORTSTATUS: g21: STP status Forwarding

2147483579    2012-Jan-27 08:55:52    Warning     %STP-W-PORTSTATUS: g9: STP status Forwarding

2147483580    2012-Jan-27 08:55:51    Informational     %LINK-I-Up: g21

2147483581    2012-Jan-27 08:55:48    Warning     %STP-W-PORTSTATUS: g8: STP status Forwarding

2147483582    2012-Jan-27 08:55:47    Informational     %LINK-I-Up: g9

2147483583    2012-Jan-27 08:55:44    Informational     %LINK-I-Up: g8

2147483584    2012-Jan-27 08:55:35    Warning     %STP-W-PORTSTATUS: g20: STP status Forwarding

2147483585    2012-Jan-27 08:55:32    Informational     %INIT-I-Startup: Cold Startup

2147483586    2012-Jan-27 08:55:31    Informational     %LINK-I-Up: g20

2147483587    2012-Jan-27 08:55:27    Warning     %STP-W-PORTSTATUS: g7: STP status Forwarding

2147483588    2012-Jan-27 08:55:22    Informational     %LINK-I-Up: g7

2147483589    2012-Jan-27 08:55:11    Warning     %STP-W-PORTSTATUS: g6: STP status Forwarding

2147483590    2012-Jan-27 08:55:07    Informational     %LINK-I-Up: g6

2147483591    2012-Jan-27 08:55:06    Warning     %STP-W-PORTSTATUS: g18: STP status Forwarding

2147483592    2012-Jan-27 08:55:01    Informational     %LINK-I-Up: g18

2147483593    2012-Jan-27 08:54:55    Warning     %STP-W-PORTSTATUS: g17: STP status Forwarding

2147483594    2012-Jan-27 08:54:51    Informational     %LINK-I-Up: g17

2147483595    2012-Jan-27 08:54:29    Warning     %STP-W-PORTSTATUS: g4: STP status Forwarding

2147483596    2012-Jan-27 08:54:24    Informational     %LINK-I-Up: g4

2147483597    2012-Jan-27 08:54:22    Note     %SYSLOG-N-LOGGING: Logging started.

2147483598    2010-Apr-28 19:04:46    Warning     %STP-W-PORTSTATUS: g26: STP status Forwarding

2147483599    2010-Apr-28 19:04:45    Warning     %STP-W-PORTSTATUS: g2: STP status Forwarding

2147483600    2010-Apr-28 19:04:45    Warning     %STP-W-PORTSTATUS: g14: STP status Forwarding

2147483601    2010-Apr-28 19:04:45    Warning     %STP-W-PORTSTATUS: g3: STP status Forwarding

2147483602    2010-Apr-28 19:04:43    Warning     %STP-W-PORTSTATUS: g1: STP status Forwarding

2147483603    2010-Apr-28 19:04:43    Warning     %STP-W-PORTSTATUS: g13: STP status Forwarding

2147483604    2010-Apr-28 19:04:43    Warning     %STP-W-PORTSTATUS: g28: STP status Forwarding

2147483605    2010-Apr-28 19:04:43    Warning     %STP-W-PORTSTATUS: g27: STP status Forwarding

2147483606    2010-Apr-28 19:04:42    Warning     %STP-W-PORTSTATUS: g24: STP status Forwarding

2147483607    2010-Apr-28 19:04:42    Informational     %LINK-I-Up: g26

2147483608    2010-Apr-28 19:04:41    Informational     %LINK-I-Up: g24

2147483609    2010-Apr-28 19:04:40    Informational     %LINK-I-Up: g2

2147483610    2010-Apr-28 19:04:40    Informational     %LINK-I-Up: g14

2147483611    2010-Apr-28 19:04:40    Informational     %LINK-I-Up: g3

2147483612    2010-Apr-28 19:04:39    Informational     %LINK-I-Up: g1

2147483613    2010-Apr-28 19:04:39    Informational     %LINK-I-Up: g13

2147483614    2010-Apr-28 19:04:38    Informational     %LINK-I-Up: g28

2147483615    2010-Apr-28 19:04:38    Informational     %LINK-I-Up: g27

2147483616    2010-Apr-28 19:04:38    Informational     %LINK-I-Up: Vlan 1

2147483617    2010-Apr-28 19:04:38    Warning     %LINK-W-Down: g28

2147483618    2010-Apr-28 19:04:38    Warning     %LINK-W-Down: g27

2147483619    2010-Apr-28 19:04:38    Warning     %LINK-W-Down: g26

2147483620    2010-Apr-28 19:04:38    Warning     %LINK-W-Down: g25

2147483621    2010-Apr-28 19:04:38    Warning     %LINK-W-Down: g24

2147483622    2010-Apr-28 19:04:38    Warning     %LINK-W-Down: g23

2147483623    2010-Apr-28 19:04:38    Warning     %LINK-W-Down: g22

2147483624    2010-Apr-28 19:04:38    Warning     %LINK-W-Down: g21

2147483625    2010-Apr-28 19:04:38    Warning     %LINK-W-Down: g20

2147483626    2010-Apr-28 19:04:38    Warning     %LINK-W-Down: g19

2147483627    2010-Apr-28 19:04:37    Warning     %LINK-W-Down: g18

2147483628    2010-Apr-28 19:04:37    Warning     %LINK-W-Down: g17

2147483629    2010-Apr-28 19:04:37    Warning     %LINK-W-Down: g16

2147483630    2010-Apr-28 19:04:37    Warning     %LINK-W-Down: g15

2147483631    2010-Apr-28 19:04:37    Warning     %LINK-W-Down: g14

3 REPLIES
Cisco Employee

SG 300-28 28-Port Gigabit Managed Switch Issue

Just making a guess..

I really doubt if this is a problem with the capacity of your switch.

from the logs i could see the following.

1. check your AAA configuration. it seem to complain about the rejection of a console connection.

2. Looks like the port-fast enabled port flaps frequenctly so you could see lots of STP messages

-Vijay

New Member

SG 300-28 28-Port Gigabit Managed Switch Issue

Thanks Vijay for your reply.

I entered username and password wrongly in GUI, so I was getting AAA messages. Does your second point means that any bridge looping is happening? As you can see in the topology, we have connected many unmanaged switches. Is there any way to check looping in switch GUI ?

Cisco Employee

SG 300-28 28-Port Gigabit Managed Switch Issue

from the console messages, i see that link flaps. ie., the link goes down and comes back.

To my understanding, there is no bridge loop happening but instead some ports goes down and comes back up.

since the port directly goes to the forwarding state,  I guess portfast should be enabled.

-Vijay

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