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Community Member


Hi, I see this error message in my Cisco 3750 switches.

Any one can tell me what's the problem?

Oct 19 10:44:15: %PLATFORM_UCAST-3-ADJ:

MAD Lock failed (IP: MAD - rwi:10F ref:0 Ret:2)?

-Traceback= 6B2754 6A10E4 69AC5C 69B488 6F62A0 6F6D28 24EB34 24F26C 24FD10 373930 1ECFFC


Re: %PLATFORM_UCAST-3-ADJ: MAD Lock failed

Hi Kevin,

This message means that the adjacency module for unicast routing encountered an error.

Can you plese post the output of sh version.



Community Member

Re: %PLATFORM_UCAST-3-ADJ: MAD Lock failed

S1#sh ver

Cisco Internetwork Operating System Software

IOS (tm) C3750 Software (C3750-I5-M), Version 12.1(19)EA1c, RELEASE SOFTWARE (fc2)

Copyright (c) 1986-2004 by cisco Systems, Inc.

Compiled Tue 03-Feb-04 08:18 by yenanh

Image text-base: 0x00003000, data-base: 0x0091D318

ROM: Bootstrap program is C3750 boot loader

BOOTLDR: C3750 Boot Loader (C3750-HBOOT-M) Version 12.1(14r)EA1a, RELEASE SOFTWARE (fc1)

S1 uptime is 22 weeks, 5 days, 23 hours, 28 minutes

System returned to ROM by power-on

System restarted at 11:38:49 nzst Thu May 12 2005

System image file is "flash:/c3750-i5-mz.121-19.EA1c.bin"

cisco WS-C3750-24TS (PowerPC405) processor (revision F0) with 118776K/12288K bytes of memory.

Processor board ID CAT0847K1GU

Last reset from power-on

Bridging software.

4 Virtual Ethernet/IEEE 802.3 interface(s)

24 FastEthernet/IEEE 802.3 interface(s)

2 Gigabit Ethernet/IEEE 802.3 interface(s)

The password-recovery mechanism is enabled.

512K bytes of flash-simulated non-volatile configuration memory.

Base ethernet MAC Address : 00:12:80:BF:2E:00

Motherboard assembly number : 73-7055-08

Power supply part number : 341-0034-01

Motherboard serial number : CAT084719G9

Power supply serial number : PHI083900DY

Model revision number : F0

Motherboard revision number : A0

Model number : WS-C3750-24TS-E

System serial number : CAT0847K1GU

Hardware Board Revision Number : 0x06

Switch Ports Model SW Version SW Image

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

* 1 26 WS-C3750-24TS 12.1(19)EA1c C3750-I5-M

Configuration register is 0xF


Community Member

Re: %PLATFORM_UCAST-3-ADJ: MAD Lock failed


Community Member

Re: %PLATFORM_UCAST-3-ADJ: MAD Lock failed

You are running into the following bug:

CSCed08256 - 12.2S:MAD Lock failed (IP:x.x.x.x MAD - rwi:A ref:0 Ret:2)

This is fixed in 12.2(18)SE and onwards.

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