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3750-48 PoE

keithmatsepe
Level 1
Level 1

3750 runs low memory too often. The current memory is 128MB. Switch almost fully populated with ip phones/PCs. Is this an IOS bug? Running IOS is C3750-IPSERVICES-M), Version 12.2(25)SEE3

6 Replies 6

Giuseppe Larosa
Hall of Fame
Hall of Fame

Hello Keith,

use sh proc mem to see what processes are using the memory.

Have you got any routing protocol running on it ?

Security measures like Dynamic ARP inspection, DHCP snooping and so on ?

802.1X ?

If the switch is used as a simple L2 switch with no additional features it should be fine and quiet about memory.

If this is the case I would think of an IOS upgrade to 12.2(46)SE or 12.2(44)SE.

Hope to help

Giuseppe

Giuseppe,

We're using the switch as L3 and running the following on the:

OSPF

802.1x

AAA - Radius/Tacacs

L3 Portchannels

ACLs

MQC

And that's pretty much what we running on the box.

Perhaps i should ugrade to later IOS.

Hello Keith,

how many OSPF routes are in the db ?

use

sh ip ospf summary

if in the order of thousands you should think to put it in an OSPF stub area but you likely have already it in a stub area.

if you like you can post the sh proc mem to see what are the processes that uses more memory.

Copy it to a text file with .csv extension import it in a spreadsheet and order based on memory usage

(I don't rembember is a sh proc mem sorted option exists)

Hope to help

Giuseppe

Giuseppe,

My area is stub and I have less than 100 routes in the db. See the top memory users on the switch below,

HRPC qos request

HQM Stack Proces

RedEarth Tx Mana

Hulc LED Process

*Init*

SNMP ENGINE

And just for interest sake , there is no command sh ip ospf summary, but sh ip ospf summary-address.

Hello Keith,

sorry for the mistake

the right command should be

sh ip ospf database summary

However, OSPF is not an issue in your scenario.

I would go for an IOS upgrade

Hope to help

Giuseppe

Will do... Thanks for you time and efforts.

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