Cisco Switching/Routing :: 1900 Acceptable Memory Leaks Quantity And CPU
Apr 24, 2013
I am troubleshooting memory leaks and buffers issues on my 1900 and had some doubts regarding the problems that my router causes.Intermitently during the day for no reason the gig0/0 interface connected to ISP stops responding from our management network (log shows that the interface goes down). The ISPs modem responds fine from my management network.The issue goes away by itself in 20 minutes, sometimes more or after a hard reboot.Sometimes a router would increment a throttle value to 1. When running for 4 days without a reboot, the router raised 39 throttles and 57 input drops. [code] The router is running Version 15.1(2)T4 and I was not able to find any caveats on cisco web page (although I havent used the bug finder tool)Is this only leak I found a reason to start worrying or I can disregard it and continue basic troubleshooting (change cable and plug my ISP to another port)
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Apr 25, 2013
How many VLAN Interface can be create on a WLC Interface, e.g. GigabitEthernet 1?
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Jan 8, 2012
I've been implementing a setup where a remote office has a Cisco 1900 router. There are 2 GRE/ IP SEC tunnels to the headquarters, 1 over public internet, 1 over a private cloud. Because of some MTU issues we have to clear the DF bit for some of the traffic, but we also want to use PBR to send https traffic over the "public internet" tunnel and the rest of the traffic over the "private cloud" tunnel. I'm able to clear the DF bit and to do the PBR with route-maps, but I'm not able to implement both functionality at the same time.
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Jan 1, 2012
I can see the console on the router. (Using the USB console connected to a Macintosh.) I was configuring the router though this console connection, and I created a new user (priv level 15) and removed the default 'cisco' user. So I'm stuck at the username/password login prompt now.
I decided to do the password recovery procedure (via the cisco doc I found etc), but I cannot break into ROMMON during the boot process. I'm not sure if that's because my Mac isn't sending the break, or what.
The pw recovery doc says you can "remove flash" if you can't break into the boot sequence. However, I cannot find any instructions on how to remove the flash. I've opened the router, and I see one very small daughter card on the main board that I think is the flash, but I'm not about to start arbitrarly prying parts off.
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Apr 29, 2013
How to get the Snmp OID for polling the in and out utilization for the CIsco 1900 Series Router interfaces.
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Feb 1, 2013
i have a cisco catalyst 1900 & i like to share internet among 15 PC in my lab they all are connected to the switch through a patch panel should i connect my ADSL Modem to the switch, the switch is running on default config.
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May 15, 2013
we ordered a data e-delivery PAK L-SL-29-DATA-K9= (FOR A 2900 SERIES ROUTER) but after we received the PAK we discovered that the client actually has a 1900 router. Any easiest way of rectifying this mistake so that we can use the PAK on a 1900 series router?
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Oct 15, 2012
I've got a problem with DHCP running on a cisco 1900 series router, 1921 to be precise. The Data VLAN works perfectly, i configured a ip helper address and its working. Problem tough is VLAN 20. This is the voice vlan. As u can see in the config below, this has been configured using VRRP and VRF for failover purposes. I did more of these configurations, and they all worked fine, just not with this particular router!
As u will notice i deleted all the not needed to know information or i X'ed it!
Jan-Aart
version 15.1
service timestamps debug datetime msec
[Code]......
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Sep 1, 2012
I setup a GRE tunnel between two cisco 1800 & 1900 routers. I can't received multicast.
Here is a copy of my configs:
R3#Building configuration...
Current configuration : 1238 bytes!version 12.4service timestamps debug datetime msecservice timestamps log datetime msecno service password-encryption!hostname R3!boot-start-markerboot-end-marker!logging message-counter syslog!no aaa new-modeldot11 syslogip source-route!ip cefip multicast-routing no ipv6 cef!multilink bundle-name authenticated!archivelog config hidekeys! interface Loopback0ip address 10.0.0.3 255.255.255.255!interface Tunnel0ip address 192.168.24.2 255.255.255.252ip pim sparse-modetunnel source Loopback0tunnel destination 10.0.0.1!interface FastEthernet0/0ip address 10.0.3.1 255.255.255.0ip pim sparse-modeduplex autospeed auto!interface FastEthernet0/1ip address 192.168.23.2 255.255.255.252ip pim sparse-modeduplex autospeed auto!interface Serial0/0/0no ip addressshutdownno fair-queueclock rate 2000000! router eigrp 1network 10.0.0.3 0.0.0.0network 10.0.3.1 0.0.0.0network 192.168.23.2 0.0.0.0no auto-summary!ip forward-protocol ndno ip http serverno ip http secure-server!control-plane!line con 0line aux 0line vty 0 4exec-timeout 5 0privilege level 15no login!scheduler allocate 20000 1000end
[code]....
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Jan 1, 2013
i have a cisco 1900 series router from the isp and we connect it the our router the rv042 small biz, and we have here a cisco catalyst 2950 switch with just default configuration connected to the hosts.
my problem is from time to time that the connection is lost there is no connection with the router and the only solution is to turn off and on the cisco 1900 router and the connection will be back.
do we need to configure the routers and switches? what do you need to configure?
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May 29, 2012
According to my boss every 3 to 4 months he has to restart our 2821 with a 16-esw module installed because of a low memory issue dealing with CEF. Here is the exact error message.
%% Low on memory; try again laterJun 8 11:18:51.777: %FIB-2-FIBDOWN: CEF has been disabled due to a low memory condition. It can be re-enabled by configuring "ip cef [distributed]" Jun 8 11:19:51.823: %FIB-2-FIBDOWN: CEF has been disabled due to a low memory condition. It can be re-enabled by configuring "ip cef [distributed]" %%
Low on memory; try again later
%% Low on memory; try again later
%% Low on memory; try again later
Jun 8 11:20:51.868: %FIB-2-FIBDOWN: CEF has been disabled due to a low memory condition. It can be re-enabled by configuring "ip cef [distributed]" Jun 8 11:21:51.914: %FIB-2-FIBDOWN: CEF has been disabled due to a low memory condition. It can be re-enabled by configuring "ip cef [distributed
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Nov 22, 2011
Today, one of our Cisco 3750 got unmanaged from NOC, we were able to ping the switch, also, traffic was flowing fine but not able to telnet or local login.On trying to login through console following messages were coming:
%% Low on memory; try again later
%% Low on memory; try again later
%% Low on memory; try again later
%% Low on memory; try again later
%% Low on memory; try again later
%% Low on memory; try again later
[code].....
We given power on reset, after which we were able to login switch again. I wanted to know the actual reason behind it and if there is any other way to recover switch other than power reset.?
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Sep 5, 2012
ISRG2 (c2951-universalk9-mz.SPA.152-4.M1.bin) has 512 MB of DRAM. Periodically it runs out of memory: [code]
1. Why "show process mean" command shows less memory than 512 MB? Processor Pool (248 MB) + I/O Pool (58 MB) ~ 310 MB only?
2. *Init* process holds more memory than normal (202 MB). What may cause this?
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Jul 25, 2012
have 3 Catalyst 3750 in same stack, the IOS version is 12.2(53)SE2. Today we can not telnet/ssh to this switch, but ping is ok, and switch function is ok. I try to access the console port, it show "low on memory, try again later". After I reboot the master switch in the stack, the master switch change to another switch, then I can telnet/ssh to this switch. I check the Ciscoworks server syslog report, there are many MAC address flapping error message, and I beleive the MAC address flapping occured before several weeks. ( the G2/0/15 & G3/0/15 is connect to a VMware ESX server and the EtherChannel config mismatch with this Catalyst 3750 switch ) How to mention the root cause of the "low on memory" problem and what is the abnormal memory usage ( free memory percentage below ?% )?
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Nov 3, 2011
i have a Ws-C3550-24-Emi switch and i need to upgrade its flash memory to 32Mb. I couldn't find any documents in cisco website about the memory upgrade guideline. Possible to upgrade this switch to 32Mb? If so, what's the max of memory i can upgrade? and the part number for this type of memory?
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Dec 28, 2011
I have a bootflash in 4507R with the size of 60MB. I upgraded the ios from cat4500-ipbasek9-mz.122-37.SG1.bin (12.8MB Size) to cat4500-entservices-mz.122-37.SG1.bin (13.8 MB SIZE) and deleted the previous IOS.But previous IOS is still getting shown in sh bootflash: command. Furthermore, dir bootflash: commands shows there is only one IOS , which is running. How I can free the space from bootflash , as I again have to upgrade the another new IOS ( of 16MB), which I tried through solarwinds tftp and couldn't upload successfully because of its limitation. Now, If I try to upload the new IOS through FTP, it gives me memory space error. How I can free the space captured by old IOS and also how I can delete the 3rd unknown entry of IOS (shown below output of commands)?
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Jul 15, 2009
I have a 3560 connected to an edge device and I keep etting this error. I have turned off proxy arp and turned off ip cef under the interface, however I lot connectivity to the internet when I did that. I can't seem to find any documentation on this error. I understand what it means, I just don't know how to resolve the problem.
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Dec 9, 2012
I am noticing high memory used on my 2960-S I am running 15.0(2)SE. I am concerned that there is a problem with this model and IOS.
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Jun 7, 2013
I have a 3560 connected to an edge device and I keep etting this error. I have turned off proxy arp and turned off ip cef under the interface, however I lot connectivity to the internet when I did that. I can't seem to find any documentation on this error. [code]
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Sep 6, 2012
I have a Switch WS-C3750E-48PD-SF with IOS 12.2(58)SE2 which reports more than 80% in utilization of memory I don't know what is causing the high memory utilization.
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Oct 25, 2012
Recently i atsrt having problems with my cisco router 1811/k9, apparently was booting continiosly when restarted.
After i connected my console i found the problem while booting:
DDR memory test failed. Resetting the router ...
I tried to contact cisco TAC, but i need a reseller contract number to place a ticket, i do not have a resller contract number as my router was bought more than two years ago. I called cisco support and they told me to contact my reseller, my reseller told me to contact cisco so i am in a eternal loop of forwarding phone calls...
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Nov 13, 2011
which process is consuming high memory with my c6509 switch.
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Dec 6, 2011
I've noticed that my 6509's running VSS seem to have high I/O memory utilization.
I/O memory: Sw/Mod Bytes: Total Used %Used
1/1 8126344 7886544 97%
1/2 11796240 11442472 97%
1/5 RP 12058384 10715832 89%
1/5 SP 8388608 8104304 97%
1/7 8126344 7886544 97%
[code]....
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Jan 16, 2013
I managed to upgrade this C2960G-48TC-L from 12.2.35-SE5 to 15.0.2-SE1 and now I can't connect anymore via telnet nor ssh. Console output simply shows
%% Low on memory; try again later
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May 2, 2013
I noticed on the 2960 switches we have deployed that are running the latest IOS, 12.2(58)SE2, memory utilization is really high (almost 80 percent). I have not noticed any side effects but I wanted to verify this is acceptable. My question is does the high memory utilization matter? I see this may be related to bug CSCtw83946 but no resolution is mentioned.
I did some testing various IOS revisions and below is what I have found using a WS-C2960-48TC-L with default configuration and only my laptop connected to a switchport in vlan1. You will notice memory utilization will grows with each version but jumps drastically with 58. One difference with 58 I needed to use a different command to retrieve memory utilization. The output was gathered by pasting the output of the show command into the Cisco Output Interpreter on their website.
IOS
Show Command
Output
c2960-lanbasek9-mz.122-35.SE5.bin
show memory
[Code]....
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Jun 25, 2012
router 2811 has 2 files ios in flash
Router#sh fla
-#- --length-- -----date/time------ path
1 35202336 Mar 3 2008 16:12:28 +00:00 c2800nm-adventerprisek9-mz.124-8d.bin
...
13 59374168 Mar 5 2012 12:49:22 +00:00 c2800nm-adventerprisek9-mz.124-24.T.bin
151076864 bytes available (105431040 bytes used)
Router#
I try to make it load c2800nm-adventerprisek9-mz.124-24.T.bin
[Code] ...........
I did
verif flash:c2800nm-adventerprisek9-mz.124-24.T.binit is ok
is it corrupted memory? how to fix it?and aslo with System image file is "flash:c2800nm-adventerprisek9-mz.124-8d.bin"it dos not show voice ports for WIC2-FXO in runn conf
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May 1, 2012
We have a Cisco 2911 router. We installed a EHWIC-4ESG module and configured the router based on configuration below.
ROM: System Bootstrap, Version 15.0(1r)M9, RELEASE SOFTWARE (fc1)
System image file is "flash0:c2900-universalk9-mz.SPA.151-4.M1.bin"
Cisco CISCO2911/K9 (revision 1.0) with 483328K/40960K bytes of memory.
7 Gigabit Ethernet interfaces
1 terminal line(code)
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Nov 9, 2012
I am facing high memory utilization in Cisco 2960 switch having IOS version 12.2(55)SE3.
The error we are getting is:
A "LiveHealthAlarm" event has occurred, from SwCiscoIOS device, named Switch2960. eHealth Alarm Start Time - Fri 09 Nov,2012 - 03:02:48 eHealth. Switch2960-RH-MemoryPool-Processor-Processor-1.Memory utilization high-Threshold set at 70%SPECTRUM ALARM ID|22233284 I have attached the logs also.
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Dec 26, 2012
We are having 3750 Stack switch as our edge switch. Here we are having some issues as low memory & itermediate High CPU utilization.For memory when we checked its shwoing maximum memory is allocated to DHCPD receive & ARP Input as follows
Processor Pool Total: 70829380 Used: 56809532 Free: 14019848
I/O Pool Total: 12582912 Used: 8554920 Free: 4027992
Driver te Pool Total: 1048576 Used: 40 Free: 1048536
[code].....
i want to understand why this 2 proceses (DHCPD & ARP input) taking more memory?High CPU: We also facing intermediate high CPU utilization (above 95%). When CPU is high there were 2 processes consuming more CPU are 'Spanning Tree' (about 20%) & ARP Input (about 66%). we also checked the ARP entries, there were 1500 ARP entries & 2 incomplete ARP (out of 6000 ARP supported)
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Jan 21, 2012
I have a new cisco 3750 stack comprised of 8 members (6 x 3750G-48PS and 2 x 3750V2-48PS) running 'c3750-ipservicesk9-mz.122-58.SE2.bin'. I am seeing high memory utilisation, it seems to sit fairly stable and I do not see an increase but this has only been running a few days. No errors or performance issues. Should this be a cause for concern?
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Mar 22, 2012
Below memory status alerts of are seen on our syslog server for Nexus 7K switch(Default VDC).
PLATFORM-2-MEMORY_ALERT_RECOVERED: Memory Status Alert : CRITICAL ALERT RECOVERED
PLATFORM-2-MEMORY_ALERT_RECOVERED: Memory Status Alert : MINOR ALERT RECOVERED
PLATFORM-2-MEMORY_ALERT_RECOVERED: Memory Status Alert : SEVERE ALERT RECOVERED
Memory threshold Not created on Nexus. Can we ignore this alert or does it impact our current network traffic?
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Jun 11, 2013
We had a stack of 4 qty 3750g running IP base on ver 12.2.32, then installed a 3750x to the stack and upgraded the whole stack to 15.0.2 SE3. In doing so, we noticed that the memory utilization jumped from 60-70% to 83-84%.
We had the same issue occur when upgrading to 15.0.2 SE3 on another stack that was 6 qty 3750g running ip-services, but this one jumped to 90%. On the 6 qty stack, we downgraded to 12.2.55 and the memory util went back down to 60-70%.
On the mixed stack, we replaced the 3750x with another 3750g and downgraded the whole stack to 12.2.55, however, the memory utilization did not drop down. As far as I can tell, no config changes have changed from the original IOS.
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Nov 15, 2011
Since yesterday, i see
Nov 16 13:23:21.355: %SYSTEM_CONTROLLER-3-MORE_COR_ERR: 255 correctable DRAM memory errors in previous hour
Nov 16 13:23:21.355: %SYSTEM_CONTROLLER-3-COR_MEM_ERR: Correctable DRAM memory error. Count 623, log 8053C830
Nov 16 14:23:21.340: %SYSTEM_CONTROLLER-3-MORE_COR_ERR: 255 correctable DRAM memory errors in previous hour
Nov 16 14:23:21.340: %SYSTEM_CONTROLLER-3-COR_MEM_ERR: Correctable DRAM memory error. Count 879, log 8053C810
error on switch console every hour.
ios version : Cisco IOS Software, s72033_rp Software (s72033_rp-ADVIPSERVICESK9_WAN-M), Version 12.2(33)SXJ1, RELEASE SOFTWARE (fc2)
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