Cisco WAN :: Checksum Error In 1841

Jul 30, 2012

Error : compressed image checksum is incorrect 0xDC5C5348 Expected a checksum of 0x066C5349I have uploaded a new firmware but same issue after booting, I have check the MD5 checksum in the image and Cisco and they are matching and verified, what could be the reason for all of this ??

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Cisco WAN :: 2821 Checksum Error While Loading IOS

Aug 10, 2012

I have a cisco 2821 router and it has an advanceip image in the flash each time on reboot it gives the message software forced crash and checksum error and finally goes into rommon. i tried xmodem and tftpdnld -r but same problem persists. I even changed the CF with a working router's flash but the same problem occurs.I also loaded an ipbase image of about 13Mb size and all the same problem repeats with it .

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Cisco Switching/Routing :: Input Error And CRC Error On Router 1841?

Mar 12, 2013

The router 1841 is connected directly to the layer switch. the network diagram is below:
 
Office A --> Switch (L3) --> Router 1841 --> Internet --> Office B
 
However, when I transfer the file from Office A to office B, the speed very slow ( only around 40 kb/second), and there are an input error and CRC error:
 
Cisco-R1841#sh interfaces FA0/1
FastEthernet0/1 is up, line protocol is up
Hardware is Gt96k FE, address is 0019.e02f.03dd (bia 0019.e02f.03dd)

[Code]......

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Cisco WAN :: Check Sum Error In 1841

Oct 7, 2012

The router is always giving the below error: 

Error : compressed image check sum is incorrect 0xDC5C5348
Expected a check sum of 0x066C5349

 I have uploaded a new firmware but same issue after booting, I have check the MD5 check sum in the image and Cisco and they are matching and verified, what could be the reason for all of this ?

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Cisco :: LMS 4.2 Possibility To MD5 Checksum All IOS Images In Repository?

Oct 8, 2012

Recently we upgraded a switch with an image from the repository in LMS. After the installation of the image it seemed corrupt.
 
My question now is : Can we do a MD5 checksum on all the images in the local repository to verify that all images are ok to use?

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AAA/Identity/Nac :: 1841 Giving Error In Authentication

May 15, 2013

I have an 1841 that was working fine - I could SSH to it with my Radius login and console into it with local credentials ("Fred").I added another use ("Mike") with priv 15 so the end user could log in locally via console if needed.After that, we can both log in via console, but when we try to enter privileged mode we get "% Error in Authentication", before even entering the   password.I can still log in via Radius SSH with no problems and access privilege mode via SSH.What am I missing so we can have two different users be able to log in locally with different credentials and access privileged mode, and keep my ssh radius working?

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Cisco WAN :: 1841 / Dual WAN With CEF Load Balancing And VPN Client Error

May 7, 2012

I have a Cisco 1841 router connected to two different lines  (same ISP) and I would like to load balance between them. I think I have  achieved this point, but the problem is that remote VPNs do not work (only from Dialer1).This is my diagram:
 
ISP1----ISP Router----------Fa0/1 ROUTER 1841
----------Fa0/0 LAN
ISP2 ----------------pppoe Dialer1 ROUTER 1841
 
I  have tried to redirect all my vpn traffic through the Dialer1 with PBR, but it does not work.

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Cisco Switching/Routing :: 1841 No Error On Connected Switch Interface

Feb 18, 2013

We are using Cisco Router 1841 and users reporting issue related to VoIP. After investigation, seeing input errors on Router LAN interface, but there is no error on connected switch interface. [code]

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Cisco Firewall :: PIX535 Booting With (Failed To Enable Checksum Capability)

Oct 18, 2011

I recently bought one Pix 535 from ebay, it comes with software version 7.22 and I upgraded it to 8.0.4, during booting, this message always comes up: "Failed to enable checksum capability", like the following:
 
//output copy
------------------------------------------------------------------------------+|          System BIOS Configuration, (C) 2000 General Software, Inc.          |+---------------------------------------+--------------------------------------+| System CPU           : Pentium III    | Low Memory           : 637KB         || Coprocessor          : Enabled        | Extended Memory      : 1023MB        || Embedded BIOS Date   : 11/28/00       | Serial Ports 1-2     : 03F8 02F8     |+---------------------------------------+--------------------------------------+
Cisco Secure PIX Firewall BIOS (4.1) #0: Tue Dec  5 17:35:26 PST 2000Platform PIX-535Flash=i28F640J5 @ 0x300
Use BREAK or ESC to interrupt flash boot.Use SPACE to begin flash boot immediately.Reading 123392 bytes of image from flash.

[code]....
 
I did copy startup-config from my existing Pix515E (8.0.4) to this PIX535, I did NOT pay attention if I had the same "failed to enable checksum capability" before image upgrade or startup-config change?how I can get over with it?

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Cisco Firewall :: Validate ASA 5505 Image Checksum / Integrity After Copied To Flash

Jan 6, 2013

I've had occasional issues with 5505 upgrades going south when the boot hangs on the image load due to a corrupt image. I need a way to validate the checksum of the new image after it is copied to flash. Remote upgrades become a real pain when you have to go onside just to delete an image, copy it into flash again, and boot.

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TCP Error - Communication Error Occurred Operation Timed Out

May 1, 2012

I'm trying to open certain websites but the browser gives me this message: "Network Error (tcp_error) A communication error occurred: "Operation timed out" The Web Server may be down, too busy, or experiencing other problems preventing it from responding to requests. You may wish to try again at a later time.

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Servers :: Error Code - 500 Internal Server Error

Apr 20, 2011

i'm currently studying at a college which has a website with a student intranet that is available to log in from any computer. So far it has been working well and I can log in on my home laptop and upload documents and look at presentations etc. Today for no reason when I try and log in I get the message Error Code 500: Internal Server Error and the webpage does no appear.I have had no problems previously and this has only happened today and yesterday, I went down to the college and accessed the website fine from the computers in the library but still no joy from my home computer.

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Cisco :: DM Vpns On 1841

Feb 1, 2013

I am putting an pre-labbed DMVPN Hub config onto a production 1841. We had to upgrade the IOS to support protection with NAT so the current IOS we're running is c1841-adventerprisek9-mz.124-25g.bin.I can paste the configuration in fine (via the tunnel interfaces) and the router accepts it however the 'show dmvpn', 'debug dmvpn' and other related commands don't work. I have checked the IOS feature navigator and it definitely shows that DMVPN phase 1 and 2 are supported in this image.

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Cisco :: 1841 Can't See Console

Nov 17, 2012

I have a 1841 router and I can ping the f/0 port from my pc. However when i try to console to it, it is not showing up anything but a blinking cursor. I tried all different baud rates on my teraterm but still not luck. I picked the baud rate disconnected and reconnected everytime and still nothing. Then I tried to telnet to it using teraterm but it would just open a console window and then close.

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Cisco WAN :: NAT Does Not Exist Twice On 1841

Apr 28, 2013

a have a router CISCO 1841 and I configured a NAT inside from the router to the firewall like this :ip nat inside source static firewall_adresse  public_adresse and its work fine and when a added it I do this command "wr" to save the configuration and I restarted the router many times and it still work fine,but in the last five months this NAT does not exsit twice and I must add it a gain.

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Cisco WAN :: How To Enable GUI For 1841

Nov 23, 2011

How to enable GUI for a Cisco 1841?

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Cisco WAN :: 1841 QOS For Rdp Traffic

May 9, 2012

We have an MPLS that connects our main office with our 7 branch offices.  We have 3Mb coming into the main office and 1.5 into all of the branch offices.  I would like to give rdp traffic the highest priority.  We have a Cisco 1841 at all branches and a Cisco 2811 at the main office. Do I have to configure QOS on all routers or just the one at the main location?

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Cisco WAN :: 1841 Does T IOS Have More Features

Jan 12, 2012

I have a cisco 1841 router and want to run BFD i think it needs IOS 12.4T..It has currently 12.4 but no T does the "T" IOS have mroe features?

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Cisco :: How To Enable GUI For 1841

Nov 23, 2011

How to enable GUI for a Cisco 1841?

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Cisco WAN :: Low Throughput On 1841

Apr 23, 2013

We have a 1841 setup with WAN and LAN subinterfaced(2 WAN connections, 1 internal VLANs) and I am recieving some pretty horrible throughput when traversing the router to the WAN.
 
I am receiving about 2 MBPS down but around 5 up.Currently there is a ACL on the WAN interface, and as well we are running NAT NVI.  It is possible that this might have something to do with it, but I am not sure.
 
Most of the CPU is going to IP input however I cannot seem to determine the cause.  One thing I am thinking is the overload for NVI is using a route-map.  Could that cause it to process switch instead of fast/CEF switch?

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Cisco WAN :: 1841 / QOS Over IPSEC VPN?

Mar 25, 2011

i have 6 sites using tandberg visioconference system, each site have a cisco router 1841 configured with ipsec vpn, i have a 4 conference a week and my bandwidth is 2 meg, and when people are working we have a lot of problems and cut in our visio conference.
 
I have a big problem, i want to make a high level QOS priority to my TANDBERG visio conference system between my sites, the issues is that there is an IPSEC VPN in my cisco routers between those sites and as i know if the traffic is crypted we can not separate the packets or give higher priority to packets over anothers.
 
can i mark traffic in the lan interface and and make a high priority befors the packets go through the ipsec tunnel?

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Cisco WAN :: 1841 Two ISP Redundancy?

Jul 16, 2012

We have cisco 1841 router with two ISP . But we facing the problem whenever our secondary ISP Link goes down the Primary has also went down.We have only one default route for primary Link

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Cisco VPN :: ASR 1002 / ISR 1841 - Get VPN

Mar 6, 2011

OK ran into a little problem with getting this to work. Only group members participate in the encryption process, correct? 
 
I have numerous remotes all coming into one central location.    I set up a KS and have currently only 2 of the remote routers set up as GM's, with the intention of the others coming into play as I move forward.   Here is basically what I have in my KS and GM's:
 
KS
crypto isakmp policy 10 encr aes authentication pre-share group 2crypto isakmp key testkey address [code]......... 
 
GM's
crypto isakmp policy 10 encr aes authentication pre-share group 2 lifetime [code]....
 
So I applied the crypto map to the serial interfaces on my routers on either side of the cloud (central-ASR1002 and remote-ISR1841).   When I did this, ALL the remotes went down and I'm not sure why. Even the ones that didn't have anything to do with gdoi.  Ya, it wasn't good.   I thought that only the group members would be affected.  
 
Is it the fact that my acl is encrypting any to any?  Surely I don't have to reverse that and have two statements with the same syntax. I'm basically just trying to encrypt all traffic from specific remotes back to the central side.   However, I'm trying to do it without taking down the rest of my network .

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Cisco WAN :: 1841 - Upgrade To 15.0?

Sep 14, 2011

I have recently started a new job where the IOS on the 1841 routers is version 12.4. These are from 2006 mainly, probably when the routers were bought.should I upgrade to 15.0? Mainly just to plug security holes that cisco have found?

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Cisco WAN :: 1841 - LAN Can't Ping WAN

Jan 24, 2011

I'm setting up an 1841 as a basic router for now and I cant get it to work.
 
[code]....

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Cisco :: 1841 With 12.4(24)T5 - EEM IP SLA Not Working

Jul 30, 2011

EEM script. I have tried below script on 1841 with 12.4(24)T5  but not working
  
snmp-server enable traps ipsla
snmp-server enable traps event-manager
ip sla 10

[Code].....

I want to try ping remote ip every 5 mins , if ping fails wait for 3 mins then trigger reload , and router come up again if ping fails reload again.

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Cisco VPN :: 1841 - NAT Rule On PIX

Jan 31, 2013

Here is the setup : 
site 2 site ipsec 
pix 515 as the server (static ip) 
Cisco 1841 (dhcp client) 
 
ezvpn client works fine for normal users that want to just authenticate with the Cisco vpn client. i have a site 2 site setup from the pix to my house, the connection is "up"  on both ends, i see phase2 initiate under the pix logs . try to ping nothing happens, even drop down the byte size and the DF bit  (aka ping xxx.xxx.xxx.xxx -l 100 -f ) ping to the next routed interface hop and i get "no translation group found for icmp src outside: xxx.xxx.xxx.xxx <--- my internal network  dst inside xxx.xxx.xxx.xxx <----  pix internal network . 
 
Am i missing a NAT rule on the pix or the 1841? 

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Cisco VPN :: 1841 - How To Setup IOS SSL VPN

Jan 25, 2013

i've been trying to setup an SSL VPN on my 1841 lab router but with no luck. i tried both clientless (anyconnect 2.5) and using a vpn client (anyconnect 3.0).
 
i'm using a win 7 PC with IP 172.16.1.50 directly connected to 1841 FE0/1 port. tried disabling PC FW, used both IE and FF and delete cookes but to no avail. below are my config and some show and debug output.

SSL_VPN_GW#show webvpn gateway
 
Gateway Name                       Admin  Operation
------------                       -----  ---------
SSL_VPN_GW                         up     up
 
SSL_VPN_GW#show webvpn context(code)

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Cisco WAN :: 5510 / 1841 - New Set Up To Use PBR

Dec 13, 2011

Here is my current situation, I have 3 Internet connections as below, at the moment they are terminate into the ASA.
 
ADSL Modem 1 (routed mode)     ADSL Modem 2 (routed mode)  Mid band Ethernet Tail (10m/10m)
ASA 5510 LAN Switch
 
I want to change it to the following, in order to use PBR on the router. ADSL Modem 1 (/29 Ip block)  ADSL Modem 2 (/29 ip block)                Mid band Ethernet Tail (10m/10m) (/28 block)
Router ASA 5510 LAN Switch
 
I need your opinion on the following points
 
1. What is the best suited router considering i have 2 adsl connections and i will need 3 WAN + 1 LAN ports in total.
2. Where should I run the NAT ? on ASA or the router. (I do have around 20 L2L IPSEC VPN tunnel on the ASA). In the new setup I would like to use ADSL 1 for the internet browsing and use ADSL 2 and Ethernet Tail for incoming service (+some outgoing to specific destinations or based on specific services)
3. I have an old 1841 with 2 Ethernet ports, am i better off buying 2 x ADSL2+ cards and use them with expansion slots?
4. Both adsl connections are PPPOA based, Can I put both adsl modems into bridge mode and create pppoa connections on 1841? (I will still have to buy a HWIC 2 ports Ethernet card).
5. Should i go for any of the above options or am i better of buying a new router?

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Cisco WAN :: 1841 Not Able To Reboot

Jul 15, 2012

I have a cisco 1841 router which isn't able to boot properly from its IOS. it always prompt me on ROMMN.

Here it is:

System Bootstrap, Version 12.4(13r)T8, RELEASE SOFTWARE (fc1)
Technical Support: [URL]
Copyright (c) 2008 by cisco Systems, Inc.
PLD version 0x10
[Code]....

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Cisco WAN :: 1841 - NAT Configuration

Sep 4, 2011

I have a little problem configuring NAT on router 1841, like this is the topology:
 
 
                    WAN (PUBLIC´S ADDRESS)   fast0/0        fast0/0/0                PUBLIC´S ADDRESS                        INSIDE (192.168.1.0/24)
ROUTER ====== X.X.X.X/30============= ROUTER ======== Z.Z.Z.Z/29 ============ SW 3560==============
  (ISP)      .253                                         .254 CLIENT  . 47                                                .48    
 
 
The connection with ISP or Extra net is a metro Ethernet, so the isp gave two ip address to the client: WAN (/30)
LAN (/29) Which be the public addresses to be used by the client if you need to publish any server on the network (like WWW), so they do not have any device that will could do the nat, like an asa or linux server, so the router has to do the Nat, because the SW 3560 does not support this feature.
 
 So... I did the following:
 
On router 1841:
 inter fast 0/0
description WAN
no shut
[ code ]... 
 
I create an interface Blackpool to simulate the LAN connection (192.168.1.0/24)
 
Inter loopb 0
ip address 192.168.1.254 255.255.255.0
ip nat inside
 [ code ] ...
 
ON SWITCH:
 
interface vlan 448
description LAN-ME
ip address Z.Z.Z.48 255.255.255.248
no shut
 ip route 0.0.0.0 0.0.0.0 Z.Z.Z.47
  
But if i try to do ping from the ip address 192.168.1.0/24 to any server´s internet the ping fails, but if i do the ping from v LAN 228 the ping is success. I will think that route map could solve the problem.

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Cisco :: Browsing Through 1841 Way Too Slow?

Jul 5, 2012

I have an 1841 running Advanced Security IOS (12.4(25) I think, have to check when I get home) that I'm using to learn about CBAC and IOS' firewall functionality. Its external interface is connected to my Windstream DSL modem in bridge mode, and the router is doing the PPPoE authentication. It's also doing NAT for my internal network, and is acting as a firewall using CBAC inspect statements and ACLs.

Everything is working at at least a baseline level: the DSL authenticates and connects, and machines on the inside can browse the web. The problem is that browsing to some sites is slow or times out. Not all sites, just some. Latency seems to be okay when doing pings. The problem seems to happen with https connections, but again, not all of them. Gmail works fine (I have it set to always use https), while my bank and credit card sites either time out or take minutes to load.

I have an "inspect https" line in my config, and have allowed https through my outbound ACL.

I'm looking for next steps for troubleshooting this. I've check CPU utilization and it's very low; not sure what else it could be. I only have a few inspect statements, for the common stuff: tcp, udp, icmp, pop3, imap, dns, tftp, ftp, and ntp.

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Cisco 1841 Router - NAT Configuration?

Apr 8, 2011

I have 2 cisco 1841 routers the one is connected to my local network and the other is the stub router and it only has 2 fastethernet interfaces. fao/1 connected to the local network and fa0/0 connected to the internet and to the other router. How can i configure NAT on the fa0/0 which is sharing the internet and local network

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