Cisco WAN :: 3845 Router CPU Utilization Up & Down?
Apr 26, 2011
I have 3845 router where 200 branches are connect. Ho have database server where branch are synch interval period.some of days observation cpu load average 70 % and sometimes it reaches 100 %.yesterday when I give command clear arp then instant cpu load reduce and 20 % yesterday cpu load 12-20 %. Today morning when I give command Cpu proc history then I found cpu load 60 % and at night it was 3 times reaches 100 %. so my question is after clear arp command at least 10 hours cpu utilization 20 % but after that it increase.so for any LAN broadcast it happend ? how i understand cpu high for Broadcasting or anything else.
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Jun 1, 2011
Cisco 3845 router (256RAM / 64Flash), increases the cpu utilization upto 70~80 percent, during the time of high utilization, I am unable to run show command on router.The configuration is simple, this is connected with two internet links (24Mbps and 8Mbps) and its about 600~700 users are using internet.show version, show memory and show process cpu outputs are attached here.
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Apr 22, 2011
My client using 3845 as a core router . 200 number of branch are connected through 6 ISP.Some of days average process shows 90 % . Max time 50 %.In the morning when Branch location are off then time also high utilization.High utilization is not continue after intervals of time or periodic time its goes to high.
have any solution for that ?. before once 3845 is crash for that. another is ready for replacee.We test another device like core switches for observation CPU rate.
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Mar 28, 2013
We have a Cisco 3845 router configured as a voice gateway with multi SIP trunks. But when it reachs 200 calls traffic, the CPU increase to 60-70% and caused by CCSIP_SPI_CONTROL process.
CPU utilization for five seconds: 46%/30%; one minute: 54%; five minutes: 58%
PID Runtime(ms) Invoked uSecs 5Sec 1Min 5Min TTY Process
377 400729448 171017979 2343 6.31% 10.71% 12.44% 0 CCSIP_SPI_CONTRO
[Code].....
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Sep 10, 2012
I have a problem with SNMP. I using Cisco 3845 in distribution layer. >600 subinterfaces. When my managment system send response - the cpu Utilization on cisco3845 near 100%. I want to prohibited my Cisco answer on response about interface status.
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Jun 21, 2010
I have installed NM-1T3/E3 IN A CISCO 3845 WITH IOS c3845-advipservicesk9-mz.124-9.T3.bin AND 512 MB RAM .WHEN I ENABLE THE CARD THE CPU PROC HISTORY SHOWS 100% WHEN DISABLED IT COMES DOWN TO 10%
Slot 0: C3845 Mother board 1GE(TX,SFP),1GE(TX), integrated VPN and 4W Port adapter, 7 ports Port adapter is analyzed
Slot 2: NM-1T3/E3 (clear/subrate) Port adapter, 1 port Port adapter is analyzed
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Dec 10, 2012
Is there any physical or technical diferrences between PWR-3845 AC/2 and PWR-3845 AC? We are trying to order replacement parts and wondering if PWR-3845 AC is for one power supply and AC/2 means you get two with one order?
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Dec 7, 2012
Is there any physical or technical diferrences between PWR-3845 AC/2 and PWR-3845 AC? We are trying to order replacement parts and if PWR-3845 AC is for one power supply and AC/2 means you get two with one order.
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Mar 24, 2011
I am installing Cisco blank CF upgrades (double the capacity of the CF that came with the router) in Cisco 3845 routers and I cannot get the IOS to load.
Network security requires tftp be disabled, so I am limited to xmodem. Slow, but it works. I know the IOS download is good, because I can load it on the CF that came with the router.
I can install, format and read the new flash. But the download locks up and bombs about 1/3 of the way through.
Note: CF that came with the router was "C" so I used the format flash: command. The new flash reads the same as the old, except that there is no file IOS loaded.
I've never had an issue upgrading an IOS, but this is my first shot at installing on a new CF.
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Apr 26, 2011
1841 & 3845 router. We send 30 GB data on 100 Mbps link. First time we use 3845 router for sending the data and 47 Min are required to complete the data, during this link utilization was 100%. After that we send same data through 1841 router & 46 Min are required for the same. Only difference in data transfer is CPU Utilization of 1841 router goes 30% & 5 % of 3845 router Can we use 1841 router instead of 3845 router ? .
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Jun 8, 2011
I am facing a issue on Cisco 3845 router, IOS is :c3845-adventerprisek9-mz.124-22.YB8.bin
I have changed the IOS as well as the Hardware but again the router is restarting. I have put the show tech-support and crash-info in Output interpreter, result is below:
ERROR MESSAGE NOTIFICATIONS (if any)
%PAR-1-FATAL (x): [chars]
Explanation: A parity error has occurred. The problem might be caused either
by a motherboard that has failed or motherboard settings that are incorrectly
set.
[Code].....
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Aug 16, 2011
Can i Use 1 single IOS in all 3845 Router?
I have S384AESK9-124xx (T) version IOS in one of my 3845 router, can i copy the IOS and install it in my 4 x 3845 Router as i require (T) Version IOS to support HWIC-2FE module.
Like wise, i have Cisco 1800 IOS- S184AESK9-124xx (T) and Cisco 2800 IOS- S28NAESK9-124xx (T) installed in my routers, will there be any issues if i copy and use the same IOS in all my respective devices?
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Oct 20, 2011
we have 3845 routers with internet service providers connected on it.we have configured router bgp 2.xxx as our AS. What is the concept behind router bgp 2.xxx with ISP ?
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Dec 19, 2010
Can I delete the running IOS from flash on an operational 3845 router to make room for the newer version? The flash isn't large enough to hold two versions. Doesn't the IOS get loaded and run from NVRAM? I don't want to take down an operational router but may have no other choice?
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Jun 25, 2011
I am looking for example of ACL to deny overlap fragments,i have 3 messages on a router 3845 , follow cisco documentation it might be an attack on a host the recommendation was to create an ACL to deny overlap,
.Jun 25 07:35:49.097: %IP_VFR-3-OVERLAP_FRAGMENTS: GigabitEthernet0/0: from the host 183.216.33.100 destined to xx.xx.205.102
.Jun 25 07:35:49.101: %IP_VFR-3-OVERLAP_FRAGMENTS: GigabitEthernet0/0: from the host 183.216.33.100 destined to xx.xx.205.102
.Jun 25 07:36:29.566: %IP_VFR-3-OVERLAP_FRAGMENTS: GigabitEthernet0/0: from the host 183.216.33.100 destined to xx.xx.205.102
[URL]
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May 2, 2011
I have 3845 Router which is continuously rebooting; console output is attached.
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Sep 26, 2011
Using particular coax cable between a MGX and a Cisco 3845 router. The router has a NM-1A-T3/E3 network module (most likely since the label that the guys onsite saw at the back of the router says 1A-T3.The MGX meanwhile has a AXSME-16T3E3 front card and a SMB 8TE (?) back card, based on what our client said. There is presently a miniBNC-to-BNC coax cable connecting the MGX to the 3845, muck like the picture below. There are CRC errors on the ATM interface and the client would like to replace this cable. Unfortunately, I cannot find the exact Cisco cable for this.
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Jul 25, 2012
In our Environmet we have 3845 Edge Router Current Ios Version is Version 12.4(1a),(c3845-advipservicesk9-mz.124-1a.bin)As management got another fiber leased line(Single Mode) for which i have install SFP slot part number HWIC-1GE-SFP,after installation of HWIC-1GE-SFP in router the follwing slot is showing
GigabitEthernet0/1/0
%HWIC_1GE_SFP-6-SFP_IN: Interface GigabitEthernet0/1/0 1000BaseLX SFP has been inserted
Interface IP-Address OK? Method Status Protocol
GigabitEthernet0/1/0 xx.xx.xx.xx. YES manual up down
for testing purpose i tried the same procedure into the switch and its working fine where as in Router the link is not coming up ,
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Aug 4, 2011
One customer Router Cisco 3845 has been restarted with bus error given below,
" System returned to ROM by bus error at PC 0x603697BC, address 0xD0D0D11 "
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Nov 18, 2011
in my lab environment, I have a site-to-site VPN between a Pix515E and Cisco 3845 router, using AES-256/DH-5/SHA for isakmp and AES-256/SHA/PFS group5 for the site-to-site VPN, I can only push about 26Mbps IPSec traffics (tested with Iperf). CPU on the Pix515E is running at 96% utilization
Now if I replace the Pix515E with another Cisco 3845 router, I can push about 100bps. Why such a big difference between the data sheet and actual real world
[code]...
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Jan 19, 2010
I have a Router 2821 with c2800nm-advipservicesk9-mz.124-24.T1.bin and with a Cisco Integrated Service Engine(s) Cisco Unity Express 7.1.1 in slot 1 , this router shows a high cpu utilization.I think is a bug with the IOS , because there is no voicemail configured on the CUE, there is no traffic to the CUE , just traffic from:
- voice calls
- ospf
The ospf is not the cause of the high cpu , because the high cpu utilization appears before I put the ospf proccess on the router.
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Jan 20, 2011
Have high cpu utilization on Cisco 7609 router. when i check output "Sh proc cpu sort".
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Apr 12, 2011
I have problems with the Router 2801.When i give the command show processes cpu, the command show me that the router is working in 98%.
I have vlans like voice vlan and others, I have one 20 Mb Wan Link and I redirect all traffic from my lan to this link and when i browse in internet or i do downloads the router goes to 98%, when i don't make it the router processes goes down.
I thought be problem with hardware, but i exchange to another router and the same problem happened.Before this situation, I had one link with 12 Mb and nothing happened, when i exchange this to the 20 mb link the problems starting.
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May 9, 2011
there is no logging in the access-list (there is only one inbound access list).Using QoS or not, doesn't seem to make a differenceAll route-caching features are ON. (CEF, Flow, Policy, Fast)Yet the minimum CPU utilisation I have seen is 25%/25%... On average it's 40% during the day, but once traffic picks up to around 6000 packets per second, the router is gone...I have a 50/50 Mbps connection, but I can use only 6 for VoIP ?
Show interfaces:
GigabitEthernet0/0 is up, line protocol is up
Hardware is MV96340 Ethernet, address is 0014.1c26.7c30 (bia 0014.1c26.7c30)
Description: $ETH-LAN$$FW_INSIDE$
MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
reliability 255/255, txload 6/255, rxload 7/255
[code]...
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Dec 26, 2012
I have the following commands on my Cisco 3845 router running IOS version 12.2(24)T4:
ntp server 192.168.1.1 prefer
ntp server 192.168.1.2
ntp source loopback0
I see that the router is sending out NTP version 4; however, my NTP server is configured to accept only NTP version 3. Anything other than version 3 will be dropped.
How do I go about to configure NTP on the Cisco IOS router to send out only version 3 and not version 4?
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Jul 20, 2011
I have the following problem with DFM 3.0.2:
One of my customers has got a Cisco 3845 router with some E1 controllers in it. DFM sometimes generates an alert that says the controllers are flapping, meanwhile there is no syslog, or snmp-trap generated in the router itself. If the cables disconnected/connected, or a shut/no shut command was issued ont the interfaces, the router generates the syslog and snmp-trap as it is required.
So in a nutshell it seems that there is no flapping ont the controller, but for some reason DFM thinks that there was one.
I searched for bugs, but wasn't be able to find anything relevant neither in DFM, nor in the IOS itself (c3845-advsecurityk9-mz.124-24.T2.bin)
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Jun 3, 2013
Is there any risk to install an HWIC-2FE card into a production 3845 router while it is in a powered up state? Is it recommended to power it down first, then install it?
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Sep 2, 2010
I have a problem in configuring two pair of backup interface on my customer's router (3845). It's ok when I configure just one of them. If I configure both pairs of interfaces into backup interface, one of them will be in disabled mode, as shown below :
WANR01#sh ip int bri
Interface IP-Address OK? Method Status Protocol
GigabitEthernet0/0 172.16.199.106 YES NVRAM up up
GigabitEthernet0/1 172.16.3.5 YES NVRAM up up
Serial0/0/0 unassigned YES NVRAM administratively down down
Serial0/0/1 unassigned YES NVRAM administratively down down
FastEthernet0/1/0 125.213.133.186 YES NVRAM standby mode down
FastEthernet0/2/0 172.112.22.6 YES NVRAM standby mode/disabled down
FastEthernet0/2/1 123.231.177.238 YES NVRAM up up
Loopback0 172.16.199.12 YES NVRAM up up
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Apr 25, 2013
I have VPN Router (3845) in Head Office and VPN Router (1921) at Branch Office. I have also internet router (1921) which passes through ASA 5520 to internal Network at Head Office. I can give internet connectivity to Head Office Users by giving access in ASA 5520 with following lines: nat (inside) 1 192.168.2.13 255.255.255.255.
I have added line for internet access for Branch Users in following manner in ASA 5520: nat (inside) 1 173.16.33.4 255.255.255.255. My Head Office user can access internet but my branch office user cant access internet. how can i give internet access to my branch office users?
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Apr 16, 2011
I have 3 Cisco Routers as following :G.SHDSL Router : Cisco 3845 withISDN and Branch Router : Cisco 2811.How My Network works :Branch Router has two type of connection ( First one : G.SHDSL link work as Main link and the other one ISDN Link work as Backup link )when main link goes down the ISDN link goes up ...( Note : i applied IP SLA with tracking ) ...
My Problem :i want to delete default route from ( G.SHDSL Router )0.0.0.0 0.0.0.0 dialer 3..My network works properly with these configuration but when i delete the default route 0.0.0.0 0.0.0.0 dailer3 , my network goes down ( Failover technique not works)
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Dec 6, 2012
I have on 7200 series router with NPE-G1 module which is facing high CPU utilization. I have not found any particular process causing this high CPU utilization as it is caused due to interrupts. I have already enabled fast switching by "ip cef" command. Please suggest how to normalize the utilization as it is impacting the network and causing slowness. Please find below the output of show process cpu and also find attached the show tech of the device. Also let me know if any other output is required.
[CODE]...
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Jul 29, 2012
We have a 7206 router which acts as a MPLS Hub router for around 100+ remote locations. Bandwidh at mpls hub(terminated on this router) is 50 Mbps.
We have noticed that Memory utilization in this router gradually increases and when it reaches 100% this router hangs. It happence in frequesncy of 10 days and we have to restart the router when memory is 100%.
CPU utilization is normal i.e below 20%, WAN bandwidth will never cross 30mbps.
We are running OSPF on this router
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May 3, 2011
I have problems with router 2801, the version is
Cisco IOS Software, 2801 Software (C2801-ADVENTERPRISEK9-M), Version 12.4(24)T4, RELEASE SOFTWARE (fc2)
When i start a download the processes of the router cpu stay in 99%/97%. When i'm not doing a download the processes stay in 3%/0%. I have one 20 mb link to Wan.
I did the troubleshooting seeing the this document :
[URL]
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