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New Member

PIX - Memory allocation Error

On our network we have two PIX-520 in failover configuration.

Today, for the first time in five years, the active PIX started

generating thousands (almost a million in 15min) of messages:

%PIX-3-211001: Memory allocation Error

The failover PIX didn't switch to active, so the traffic

stopped flowing through the firewall.

A power down/up of the active PIX resolved the problem.

Is it a symptom of an hardware memory failure or an

effect of some hacker attack ??

Has anybody recently experienced a similar problem ?

Thank you,

Alessandro Asson


CINECA - Via Magnanelli, 6/3 I-40033 Casalecchio di Reno (BO) Italy

e-mail: tel +39 051 6171411 fax: +39 051 6132198

Cisco Employee

Re: PIX - Memory allocation Error


Cant say whether it is an attack or a hardware issue at the moment. You need to provide the following

show conn count

show xlat count

show version



New Member

Re: PIX - Memory allocation Error


here is the show xx commands output, taken now, not when the problem was present.. (at that time the pix

was not accessible)

Thank you,

Alessandro Asson


pixfirewall# sh conn count

3599 in use, 9146 most used


pixfirewall# sh xlat count

2793 in use, 2794 most used


pixfirewall# sh ver

Cisco PIX Firewall Version 6.3(1)

Cisco PIX Device Manager Version 2.1(1)

Compiled on Wed 19-Mar-03 11:49 by morlee

pixfirewall up 30 days 17 hours

Hardware: SE440BX2, 128 MB RAM, CPU Pentium II 350 MHz

Flash i28F640J5 @ 0x300, 16MB

BIOS Flash AT29C257 @ 0xfffd8000, 32KB

0: ethernet0: address is 00d0.b785.4722, irq 11

1: ethernet1: address is 00d0.b785.4649, irq 10

2: ethernet2: address is 00e0.b601.090e, irq 15

3: ethernet3: address is 00e0.b601.090d, irq 9

4: ethernet4: address is 00e0.b601.090c, irq 11

5: ethernet5: address is 00e0.b601.090b, irq 10

Licensed Features:

Failover: Enabled

VPN-DES: Enabled

VPN-3DES-AES: Enabled

Maximum Interfaces: 6

Cut-through Proxy: Enabled

Guards: Enabled

URL-filtering: Enabled

Inside Hosts: Unlimited

Throughput: Unlimited

IKE peers: Unlimited

This PIX has an Unrestricted (UR) license.

Serial Number: 18030673 (0x1132051)

Running Activation Key: 0xe21920a6 0xeac8139b 0x4b3172af 0xb9e4be7c

Configuration last modified by enable_15 at 11:26:10.538 MET Fri Feb 20 2004

Cisco Employee

Re: PIX - Memory allocation Error

this output seems to be normal. we would needed the same output at the time of the problem.

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