Catalyst 4900m logged C4K_EBM-3-CANTALLOCATEVLANHOSTENTRY

[jayshihlin]

Hi All,

I have Catalyst 4900m running at "

cat4500e-entservicesk9-mz.122-54.SG1.bin" image.  I setup this 4900m to be wireless network layer 3 router.  However, recently the switch start logging

%C4K_EBM-3-CANTALLOCATEVLANHOSTENTRY

based on

http://www.cisco.com/en/US/docs/switches/lan/catalyst4500/12.2/53SG/system/messages/emsg.html

it stated that the error log indicated lack of memory but as far as I remember the 4900m is not upgrable or I just don't know.

Here is syslog:

Sep 10 12:52:05.893 PDT: %C4K_EBM-3-CANTALLOCATEVLANHOSTENTRY: (Suppressed 17124 times)No vlan host table memory to add entry for addr04:15:52:51:E0:17

Sep 10 12:57:05.931 PDT: %C4K_EBM-3-CANTALLOCATEVLANHOSTENTRY: (Suppressed 51638 times)No vlan host table memory to add entry for addrB0:79:94:48:37:B9

Sep 10 13:02:05.965 PDT: %C4K_EBM-3-CANTALLOCATEVLANHOSTENTRY: (Suppressed 192327 times)No vlan host table memory to add entry for addr84:38:35:DA:66:71

Sep 10 13:07:06.011 PDT: %C4K_EBM-3-CANTALLOCATEVLANHOSTENTRY: (Suppressed 175751 times)No vlan host table memory to add entry for addrE8:8D:28:C1:42:6A

Sep 10 13:12:06.045 PDT: %C4K_EBM-3-CANTALLOCATEVLANHOSTENTRY: (Suppressed 163907 times)No vlan host table memory to add entry for addr90:18:7C:80:CB:39

Sep 10 13:17:06.083 PDT: %C4K_EBM-3-CANTALLOCATEVLANHOSTENTRY: (Suppressed 157474 times)No vlan host table memory to add entry for addrC8:33:4B:11:A5:8A

Sep 10 13:22:06.121 PDT: %C4K_EBM-3-CANTALLOCATEVLANHOSTENTRY: (Suppressed 99599 times)No vlan host table memory to add entry for addr54:26:96:D6:90:C1

Sep 10 13:27:06.163 PDT: %C4K_EBM-3-CANTALLOCATEVLANHOSTENTRY: (Suppressed 68772 times)No vlan host table memory to add entry for addr14:10:9F:B8:17:61

Sep 10 13:32:06.261 PDT: %C4K_EBM-3-CANTALLOCATEVLANHOSTENTRY: (Suppressed 74283 times)No vlan host table memory to add entry for addr00:88:65:D1:4F:92

Sep 10 13:37:15.724 PDT: %C4K_EBM-3-CANTALLOCATEVLANHOSTENTRY: (Suppressed 44580 times)No vlan host table memory to add entry for addrF0:B4:79:21:23:C5

Here are some outputs:

switch#show ver

Cisco IOS Software, Catalyst 4500 L3 Switch Software (cat4500e-ENTSERVICESK9-M), Version 12.2(54)SG1, RELEASE SOFTWARE (fc1)

Technical Support: http://www.cisco.com/techsupport

Copyright (c) 1986-2011 by Cisco Systems, Inc.

Compiled Thu 27-Jan-11 12:07 by prod_rel_team

Image text-base: 0x10000000, data-base: 0x12E16D24

ROM: 12.2(44r)SG10

Sushi Revision 11, Tatooine Revision 141, Forerunner Revision 1.78

switch uptime is 3 weeks, 3 days, 9 hours, 51 minutes

System returned to ROM by power-on

System restarted at 05:07:05 PDT Sat Aug 17 2013

System image file is "bootflash:cat4500e-entservicesk9-mz.122-54.SG1.bin"

This product contains cryptographic features and is subject to United

States and local country laws governing import, export, transfer and

use. Delivery of Cisco cryptographic products does not imply

third-party authority to import, export, distribute or use encryption.

Importers, exporters, distributors and users are responsible for

compliance with U.S. and local country laws. By using this product you

agree to comply with applicable laws and regulations. If you are unable

to comply with U.S. and local laws, return this product immediately.

A summary of U.S. laws governing Cisco cryptographic products may be found at:

http://www.cisco.com/wwl/export/crypto/tool/stqrg.html

If you require further assistance please contact us by sending email to

export@cisco.com.

cisco WS-C4900M (MPC8548) processor (revision 2) with 524288K bytes of memory.

Processor board ID JAE15210AE5

MPC8548 CPU at 1.33GHz, Cisco Catalyst 4900M

Last reset from PowerUp

94 Virtual Ethernet interfaces

20 Gigabit Ethernet interfaces

8 Ten Gigabit Ethernet interfaces

511K bytes of non-volatile configuration memory.

Configuration register is 0x102

switch#show mac add cou

switch#show mac add count

MAC Entries for all vlans:

Dynamic Unicast Address Count:                  53627

Static Unicast Address (User-defined) Count:    0

Static Unicast Address (System-defined) Count:  185

Total Unicast MAC Addresses In Use:             53812

Total Unicast MAC Addresses Available:          55000

Multicast MAC Address Count:                    1

Total Multicast MAC Addresses Available:        32768

switch#show ip arp sum

switch#show ip arp summary

38061 IP ARP entries, with 0 of them incomplete

switch#

Any suggestions are greatly appreciated.

Thank in adnvaced,

=J=

[acampbell]

Hi,

Cant find any bugs for this issue.

Your IOS is at the top of the version train.

You NEED to raise a TAC case for this.

Regards,
Alex.
Please rate useful posts.

[Vignesh Rajendran Praveen]

Hi Jay,

"C4K_EBM-3-CANTALLOCATEVLANHOSTENTRY" errors seen on the device.

This event can be caused by excessive number of mac addresses to learn on this environment or they can be a result of network instability.

Please check if there are topology change or host flapping (show span det | i is exec|from|occur)

        Send me the output of "show mac-address-table count" when the error is seeing again.

        Can you enable MAC notification to check if there is any loop.

        (config)#mac address-table notification mac-move

        After that has been enabled please send me the show log.

***********Plz do rate this post if you found it helpful*************************

Thanks & Regards,

Vignesh R P

[jayshihlin]

Hi Vignesh,

Thanks for promptly reply.  Here are some output.  Plesae know regards to Mac flapping.  Since I use this as wireless router and yes, user mac will moved from one port to another port when user roaming.  So far I don't see hundreds or thousands of hostflapping logs

Many Thanks!

=J=

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

switch#show clock
14:03:55.251 PDT Wed Sep 11 2013
switch#
switch#
switch#
switch#show span det | i is exec|from|occur
VLAN0001 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 758 last change occurred 00:03:05 ago
          from GigabitEthernet2/4
VLAN0003 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 63 last change occurred 2w0d ago
          from Port-channel12
VLAN0004 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 135 last change occurred 1w5d ago
          from Port-channel12
VLAN0019 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 7 last change occurred 3w0d ago
          from GigabitEthernet2/6
VLAN0055 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 94 last change occurred 20:08:42 ago
          from Port-channel12
VLAN0066 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 10 last change occurred 3w0d ago
          from GigabitEthernet2/6
VLAN0077 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 97 last change occurred 1w0d ago
          from Port-channel12
VLAN0184 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 95 last change occurred 1w0d ago
          from Port-channel12
VLAN0200 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 7 last change occurred 3w4d ago
          from GigabitEthernet2/5
VLAN0201 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 3 last change occurred 2w1d ago
          from GigabitEthernet2/2
VLAN0202 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 7 last change occurred 3w4d ago
          from GigabitEthernet2/4
VLAN0203 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 3 last change occurred 2w1d ago
          from GigabitEthernet2/2
VLAN0204 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 8 last change occurred 3w4d ago
          from GigabitEthernet2/11
VLAN0205 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 4 last change occurred 3w4d ago
          from GigabitEthernet2/4
VLAN0206 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 10 last change occurred 3w4d ago
          from GigabitEthernet2/5
VLAN0207 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 4 last change occurred 3w4d ago
          from GigabitEthernet2/5
VLAN0208 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 4 last change occurred 3w4d ago
          from GigabitEthernet2/3
VLAN0209 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 8 last change occurred 3w4d ago
          from GigabitEthernet2/5
VLAN0210 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 4 last change occurred 3w4d ago
          from GigabitEthernet2/5
VLAN0211 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 3 last change occurred 2w1d ago
          from GigabitEthernet2/2
VLAN0215 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 3 last change occurred 2w1d ago
          from GigabitEthernet2/2
VLAN0217 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 1 last change occurred 3w4d ago
          from GigabitEthernet2/6
VLAN0258 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 86 last change occurred 20:09:12 ago
          from Port-channel11
VLAN0260 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 4 last change occurred 3w4d ago
          from GigabitEthernet2/5
VLAN0264 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 4 last change occurred 3w4d ago
          from GigabitEthernet2/5
VLAN0300 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 4 last change occurred 3w4d ago
          from GigabitEthernet2/5
VLAN0301 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 3 last change occurred 2w1d ago
          from GigabitEthernet2/2
VLAN0302 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 4 last change occurred 3w4d ago
          from GigabitEthernet2/4
VLAN0303 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 3 last change occurred 2w1d ago
          from GigabitEthernet2/2
VLAN0304 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 4 last change occurred 3w4d ago
          from GigabitEthernet2/3
VLAN0305 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 4 last change occurred 3w4d ago
          from GigabitEthernet2/4
VLAN0306 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 6 last change occurred 3w4d ago
          from GigabitEthernet2/5
VLAN0307 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 4 last change occurred 3w4d ago
          from GigabitEthernet2/5
VLAN0308 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 8 last change occurred 3w4d ago
          from GigabitEthernet2/3
VLAN0309 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 4 last change occurred 3w4d ago
          from GigabitEthernet2/5
VLAN0310 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 1 last change occurred 3w4d ago
          from GigabitEthernet2/1
VLAN0311 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 3 last change occurred 2w1d ago
          from GigabitEthernet2/2
VLAN0315 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 9 last change occurred 2w1d ago
          from GigabitEthernet2/2
VLAN0317 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 1 last change occurred 3w4d ago
          from GigabitEthernet2/6
VLAN0318 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 1 last change occurred 3w4d ago
          from GigabitEthernet2/6
VLAN0319 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 1 last change occurred 3w4d ago
          from GigabitEthernet2/6
VLAN0320 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 1 last change occurred 3w4d ago
          from GigabitEthernet2/6
VLAN0321 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 1 last change occurred 1w4d ago
          from GigabitEthernet2/6
VLAN0322 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 1 last change occurred 1w4d ago
          from GigabitEthernet2/6
VLAN0323 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 1 last change occurred 1w4d ago
          from GigabitEthernet2/6
VLAN0324 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 1 last change occurred 1w4d ago
          from GigabitEthernet2/6
VLAN0325 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 4 last change occurred 3w2d ago
          from Port-channel2
VLAN0326 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 1 last change occurred 1w4d ago
          from GigabitEthernet2/6
VLAN0327 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 1 last change occurred 1w4d ago
          from GigabitEthernet2/6
VLAN0370 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 3 last change occurred 2w1d ago
          from GigabitEthernet2/2
VLAN0371 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 3 last change occurred 2w1d ago
          from GigabitEthernet2/2
VLAN0372 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 3 last change occurred 2w1d ago
          from GigabitEthernet2/2
VLAN0375 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 8 last change occurred 3w4d ago
          from GigabitEthernet2/11
VLAN0376 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 8 last change occurred 3w4d ago
          from GigabitEthernet2/11
VLAN0377 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 8 last change occurred 3w4d ago
          from GigabitEthernet2/11
VLAN0380 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 4 last change occurred 3w4d ago
          from GigabitEthernet2/4
VLAN0381 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 4 last change occurred 3w4d ago
          from GigabitEthernet2/4
VLAN0382 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 4 last change occurred 3w4d ago
          from GigabitEthernet2/4
VLAN0383 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 1 last change occurred 1w4d ago
          from GigabitEthernet2/4
VLAN0385 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 4 last change occurred 3w4d ago
          from GigabitEthernet2/5
VLAN0386 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 4 last change occurred 3w4d ago
          from GigabitEthernet2/5
VLAN0387 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 4 last change occurred 3w4d ago
          from GigabitEthernet2/5
VLAN0390 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 4 last change occurred 3w4d ago
          from GigabitEthernet2/6
VLAN0391 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 4 last change occurred 3w4d ago
          from GigabitEthernet2/6
VLAN0402 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 7 last change occurred 6d17h ago
          from GigabitEthernet2/6
VLAN0403 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 7 last change occurred 6d17h ago
          from GigabitEthernet2/6
VLAN0404 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 8 last change occurred 20:09:31 ago
          from GigabitEthernet2/6
VLAN0405 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 6 last change occurred 23:18:01 ago
          from GigabitEthernet2/6
VLAN0406 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 8 last change occurred 23:18:01 ago
          from GigabitEthernet2/6
VLAN0408 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 5 last change occurred 23:18:01 ago
          from GigabitEthernet2/6
VLAN0409 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 4 last change occurred 6d17h ago
          from GigabitEthernet2/6
VLAN0410 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 4 last change occurred 6d17h ago
          from GigabitEthernet2/6
VLAN0411 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 9 last change occurred 6d17h ago
          from GigabitEthernet2/6
VLAN0413 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 4 last change occurred 6d17h ago
          from GigabitEthernet2/6
VLAN0414 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 16 last change occurred 6d14h ago
          from GigabitEthernet2/6
VLAN0415 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 5 last change occurred 3w4d ago
          from GigabitEthernet2/6
VLAN0416 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 7 last change occurred 23:18:01 ago
          from GigabitEthernet2/6
VLAN0417 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 6 last change occurred 23:18:01 ago
          from GigabitEthernet2/6
VLAN0425 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 2 last change occurred 3w4d ago
          from Port-channel2
VLAN0432 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 3 last change occurred 3w4d ago
          from Port-channel12
VLAN0433 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 3 last change occurred 3w4d ago
          from Port-channel12
VLAN0434 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 9 last change occurred 20:08:43 ago
          from Port-channel11
VLAN0435 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 3 last change occurred 3w4d ago
          from Port-channel12
VLAN0436 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 3 last change occurred 3w4d ago
          from Port-channel12
VLAN0438 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 3 last change occurred 3w4d ago
          from Port-channel12
VLAN0439 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 3 last change occurred 3w4d ago
          from Port-channel12
VLAN0440 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 3 last change occurred 3w4d ago
          from Port-channel12
VLAN0441 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 3 last change occurred 3w4d ago
          from Port-channel12
VLAN0443 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 3 last change occurred 3w4d ago
          from Port-channel12
VLAN0444 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 3 last change occurred 3w4d ago
          from Port-channel12
VLAN0445 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 3 last change occurred 3w4d ago
          from Port-channel12
VLAN0446 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 3 last change occurred 3w4d ago
          from Port-channel12
VLAN0447 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 3 last change occurred 3w4d ago
          from Port-channel12
VLAN0452 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 3 last change occurred 3w4d ago
          from Port-channel12
VLAN0453 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 3 last change occurred 3w4d ago
          from Port-channel12
VLAN0454 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 5 last change occurred 20:08:43 ago
          from Port-channel11
VLAN0455 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 3 last change occurred 3w4d ago
          from Port-channel12
VLAN0456 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 3 last change occurred 3w4d ago
          from Port-channel12
VLAN0458 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 3 last change occurred 3w4d ago
          from Port-channel12
VLAN0459 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 3 last change occurred 3w4d ago
          from Port-channel12
VLAN0461 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 3 last change occurred 3w4d ago
          from Port-channel12
VLAN0463 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 3 last change occurred 3w4d ago
          from Port-channel12
VLAN0465 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 3 last change occurred 3w4d ago
          from Port-channel12
VLAN0525 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 2 last change occurred 3w4d ago
          from Port-channel2
VLAN0590 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 94 last change occurred 6d05h ago
          from GigabitEthernet2/16
VLAN0725 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 2 last change occurred 3w4d ago
          from Port-channel11
VLAN0900 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 1966 last change occurred 00:01:10 ago
          from GigabitEthernet2/12
VLAN0902 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 6 last change occurred 6d21h ago
          from Port-channel12
VLAN0903 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 3 last change occurred 3w4d ago
          from Port-channel12
VLAN0904 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 9 last change occurred 20:08:43 ago
          from Port-channel11
VLAN0905 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 7 last change occurred 1d14h ago
          from Port-channel12
VLAN0906 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 1762 last change occurred 00:01:10 ago
          from Port-channel12
VLAN0907 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 4 last change occurred 3w4d ago
          from Port-channel11
VLAN0908 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 4 last change occurred 3w4d ago
          from Port-channel11
VLAN0909 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 4 last change occurred 3w4d ago
          from Port-channel11
VLAN0910 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 4 last change occurred 3w4d ago
          from Port-channel11
VLAN0911 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 64 last change occurred 2w5d ago
          from Port-channel12
VLAN0914 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 16 last change occurred 1w0d ago
          from Port-channel12
VLAN0915 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 6 last change occurred 4d21h ago
          from Port-channel12
VLAN0917 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 8 last change occurred 2w1d ago
          from GigabitEthernet2/12
VLAN0920 is executing the rstp compatible Spanning Tree protocol
  Number of topology changes 104 last change occurred 01:52:32 ago
          from Port-channel11
switch#
switch#show mac address-table count
MAC Entries for all vlans:
Dynamic Unicast Address Count:                  53190
Static Unicast Address (User-defined) Count:    0
Static Unicast Address (System-defined) Count:  185
Total Unicast MAC Addresses In Use:             53375
Total Unicast MAC Addresses Available:          55000
Multicast MAC Address Count:                    1
Total Multicast MAC Addresses Available:        32768

switch#
switch#show log
Syslog logging: enabled (0 messages dropped, 6 messages rate-limited, 0 flushes, 0 overruns, xml disabled, filtering disabled)

No Active Message Discriminator.

No Inactive Message Discriminator.

    Console logging: disabled
    Monitor logging: disabled
    Buffer logging:  level debugging, 432 messages logged, xml disabled,
                     filtering disabled
    Exception Logging: size (8192 bytes)
    Count and timestamp logging messages: disabled
    Persistent logging: disabled

No active filter modules.

    Trap logging: level informational, 435 message lines logged
        Logging to 137.151.122.65  (udp port 514,  audit disabled,
              authentication disabled, encryption disabled, link up),
              435 message lines logged,
              0 message lines rate-limited,
              0 message lines dropped-by-MD,
              xml disabled, sequence number disabled
              filtering disabled
        Logging to 137.151.122.52  (udp port 514,  audit disabled,
              authentication disabled, encryption disabled, link up),
              435 message lines logged,
              0 message lines rate-limited,
              0 message lines dropped-by-MD,
              xml disabled, sequence number disabled
              filtering disabled

Log Buffer (8192 bytes):
able memory to add entry for addr90:18:7C:12:C4:CF
Sep  9 14:45:44.952 PDT: %C4K_EBM-3-CANTALLOCATEVLANHOSTENTRY: (Suppressed 40984 times)No vlan host table memory to add entry for addr94:94:26:07:55:AA
Sep 10 12:52:05.893 PDT: %C4K_EBM-3-CANTALLOCATEVLANHOSTENTRY: (Suppressed 17124 times)No vlan host table memory to add entry for addr04:15:52:51:E0:17
Sep 10 12:57:05.931 PDT: %C4K_EBM-3-CANTALLOCATEVLANHOSTENTRY: (Suppressed 51638 times)No vlan host table memory to add entry for addrB0:79:94:48:37:B9
Sep 10 13:02:05.965 PDT: %C4K_EBM-3-CANTALLOCATEVLANHOSTENTRY: (Suppressed 192327 times)No vlan host table memory to add entry for addr84:38:35:DA:66:71
Sep 10 13:07:06.011 PDT: %C4K_EBM-3-CANTALLOCATEVLANHOSTENTRY: (Suppressed 175751 times)No vlan host table memory to add entry for addrE8:8D:28:C1:42:6A
Sep 10 13:12:06.045 PDT: %C4K_EBM-3-CANTALLOCATEVLANHOSTENTRY: (Suppressed 163907 times)No vlan host table memory to add entry for addr90:18:7C:80:CB:39
Sep 10 13:17:06.083 PDT: %C4K_EBM-3-CANTALLOCATEVLANHOSTENTRY: (Suppressed 157474 times)No vlan host table memory to add entry for addrC8:33:4B:11:A5:8A
Sep 10 13:22:06.121 PDT: %C4K_EBM-3-CANTALLOCATEVLANHOSTENTRY: (Suppressed 99599 times)No vlan host table memory to add entry for addr54:26:96:D6:90:C1
Sep 10 13:27:06.163 PDT: %C4K_EBM-3-CANTALLOCATEVLANHOSTENTRY: (Suppressed 68772 times)No vlan host table memory to add entry for addr14:10:9F:B8:17:61
Sep 10 13:32:06.261 PDT: %C4K_EBM-3-CANTALLOCATEVLANHOSTENTRY: (Suppressed 74283 times)No vlan host table memory to add entry for addr00:88:65:D1:4F:92
Sep 10 13:37:15.724 PDT: %C4K_EBM-3-CANTALLOCATEVLANHOSTENTRY: (Suppressed 44580 times)No vlan host table memory to add entry for addrF0:B4:79:21:23:C5
Sep 11 12:53:05.610 PDT: %C4K_EBM-3-CANTALLOCATEVLANHOSTENTRY: (Suppressed 2412 times)No vlan host table memory to add entry for addrA4:67:06:8C:21:93
Sep 11 12:58:05.665 PDT: %C4K_EBM-3-CANTALLOCATEVLANHOSTENTRY: (Suppressed 61044 times)No vlan host table memory to add entry for addr04:F7:E4:D1:40:B2
Sep 11 13:03:05.695 PDT: %C4K_EBM-3-CANTALLOCATEVLANHOSTENTRY: (Suppressed 132065 times)No vlan host table memory to add entry for addr0C:8B:FD:18:86:4D
Sep 11 13:08:05.733 PDT: %C4K_EBM-3-CANTALLOCATEVLANHOSTENTRY: (Suppressed 154337 times)No vlan host table memory to add entry for addr14:10:9F:ED:EB:0C
Sep 11 13:13:05.767 PDT: %C4K_EBM-3-CANTALLOCATEVLANHOSTENTRY: (Suppressed 276483 times)No vlan host table memory to add entry for addr20:68:9D:55:32:3A
Sep 11 13:18:05.813 PDT: %C4K_EBM-3-CANTALLOCATEVLANHOSTENTRY: (Suppressed 216562 times)No vlan host table memory to add entry for addrA8:BB:CF:08:5C:6C
Sep 11 13:23:05.848 PDT: %C4K_EBM-3-CANTALLOCATEVLANHOSTENTRY: (Suppressed 229217 times)No vlan host table memory to add entry for addr70:05:14:A3:27:3A
Sep 11 13:28:05.886 PDT: %C4K_EBM-3-CANTALLOCATEVLANHOSTENTRY: (Suppressed 159087 times)No vlan host table memory to add entry for addr28:CF:DA:EC:21:9A
Sep 11 13:33:05.928 PDT: %C4K_EBM-3-CANTALLOCATEVLANHOSTENTRY: (Suppressed 104757 times)No vlan host table memory to add entry for addr10:40:F3:99:76:E8
Sep 11 13:38:05.966 PDT: %C4K_EBM-3-CANTALLOCATEVLANHOSTENTRY: (Suppressed 57331 times)No vlan host table memory to add entry for addr58:B0:35:6B:B4:C1
Sep 11 13:43:06.372 PDT: %C4K_EBM-3-CANTALLOCATEVLANHOSTENTRY: (Suppressed 19146 times)No vlan host table memory to add entry for addrCC:3A:61:26:63:5D
Sep 11 13:50:52.965 PDT: %C4K_EBM-4-HOSTFLAPPING: Host 84:38:35:98:4E:21 in vlan 306 is moving from port Gi2/5 to port Gi2/4
Sep 11 13:50:55.302 PDT: %C4K_EBM-4-HOSTFLAPPING: Host F0:CB:A1:44:C2:70 in vlan 306 is moving from port Gi2/5 to port Gi2/4
Sep 11 13:50:56.202 PDT: %C4K_EBM-4-HOSTFLAPPING: Host EC:35:86:AD:B1:5D in vlan 306 is moving from port Gi2/5 to port Gi2/4
Sep 11 13:51:16.496 PDT: %C4K_EBM-4-HOSTFLAPPING: Host 5C:96:9D:C9:EE:53 in vlan 306 is moving from port Gi2/4 to port Gi2/5
Sep 11 13:51:19.484 PDT: %C4K_EBM-4-HOSTFLAPPING: Host 90:18:7C:29:9D:E1 in vlan 306 is moving from port Gi2/5 to port Gi2/4
Sep 11 13:51:20.749 PDT: %C4K_EBM-4-HOSTFLAPPING: Host 0C:74:C2:EB:35:B3 in vlan 306 is moving from port Gi2/4 to port Gi2/5

[glen.grant]

   You have some type of issue , you probably should not be seeing 53000 mac address entries on a single 4900 .  Do a show mac address and see if a particular entry or port is  show a lot of mac addresses against it and try to identify what that is  .  You are probably exceeding the mac entry size for the switch itself  and you need to identify why ?