Cisco Switching/Routing :: Upgrading Fans On 2821 Router
Apr 3, 2012
Basically I run 3 voice gateways on 2821 routers. In two of my routers I've had fan failures, one router has had two fans die and one has had just the one.
I was going to buy the offical Cisco fan replacement kit but then I thought with such as high failure rate I'd rather buy something else and better guarentee the service to my call centres.
So, what i'm asking is:
- Is there any reason why I cannot procure a standard 80mm 12V fan with a better rating (cooling and reliability) and install this in my 2821's?
I understand this may invalidate any warranties but mine have long expired.
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Apr 22, 2013
I've just plugged in 4 Nexus5548 switches and ran through the initial setup without any issues. However, the fans seem to be stuck on full speed. At the moment they're the loudest thing in the server room.
I know this isn't the most recent OS however I was hoping to avoid updating if necessary as I don’t have the service agreement linked to my account and can’t download the update without it. Is there anything else I can try first or anything I have missed?
Software BIOS: version 3.5.0 loader: version N/A kickstart: version 5.1(3)N1(1a) system: version 5.1(3)N1(1a) power-seq: Module 1: version v1.0 Module 3: version v2.0 uC: version v1.2.0.1 SFP uC: Module 1: v1.0.0.0 BIOS compile time:
[Code]......
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Apr 5, 2012
I have a 3750-48P when plugged in has fans that spin up, but no lights on the front of the chassis. Does this mean the power supply is bad? If its bad, why do the fans power up? Also, i am not receiving any data through the console.
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Oct 2, 2012
I have been given a task to upgrade 8T1's bundle to DS3 Fractional circuit. We are currently using 2821 router with 4 VWIC-2MFT. What card/module I need to order for upgrading to fractional DS3. Also are there any compatability issues with ISP or local router.
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Nov 13, 2012
Yesterday my router was hangs and my services was stuck. I start the router hard booted and it works fine.This was second time i was facing this kind of scenario. The attached are the "show tech support" of the cisco router 2821.
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Apr 15, 2012
I have a 2821 Router, with a VWIC2-2MFT card in it, with two T1s going into that card. The two T1s are a bundled MPLS line.
I then have a cable modem connection going into the gigabit Ethernet GE 0/1 port on the router.
Right now, the cable modem provides a backup connection in case the T1s go down.
What I was wondering is if there was a way to 'combine' the bandwidth from the two T1s with the cable modem?
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Mar 17, 2013
I've 3 interfaces on router:
Gb0/0-ISP01 with DHCP client
Gb0/1-ISP02 Static IP 192.168.2.x/24
Fa0/0 - LAN 192.168.1.1/24
I want to know, how to configure:1. Set the IP of interface Gb0/0 as dhcp client from ISP01 and make it as default route.
2. How to configure the ip nat.....overload?
3. How to use the ip sla to monitor internet connectivity to 8.8.8.8 for ISP01, if it fails, to go to ISP02.
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Sep 25, 2012
We've got Cisco 2821 for our 90mb/s Internet Access. Its CPU usage is around 80%. Show process cpu does not show any cpu proccess with high utilization. But we have got plenty of policing configured for our clients using policy maps. Can this policing affect cpu usage?
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May 5, 2013
I have customer that we have configured netflow on the 2821 router that their traffic is on. Currently the company they have contracted with for the analysis is seeing data duplication. Below is the configuration for the interface and the router
Cisco 2821;
interface GigabitEthernet0/0
description TVC-FI-Ethernet-Fiber-Ethernet link
ip address 216.255.164.33 255.255.255.248 secondary
ip address 192.168.5.1 255.255.255.0 secondary
ip address 216.255.166.129 255.255.255.128 secondary
[code]....
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May 21, 2012
One of our client wants to know "How many route entries a 2821 router or 881 router can support" Such as the 3750 can support 11k routes in ‘desktop routing’ mode. But I want to know the limitations on routers.
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Feb 19, 2013
I wan to migrate from a router 2800 to L3 switch 3750G , the thing is that we have several vlans and we use a router sometimes with each interface configure with correspoinding vlan subnet ip to route traffic between vlans there is no static or dynamic routing only directly connected interfaces on router routing traffic to each other ?How would i configure a L3 switch interface for simillar functionality , below is my current router configuration
!
ip domain name yourdomain.com
multilink bundle-name authenticated
!
vtp mode transparent
[code]...
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Feb 22, 2013
I have a cisco 2821 router where as a cisco 2960 switch with connect on router as a trunk & one user vlan . this is my WAN router all traffic are internal . i have 2MB data connectivity on my WAN side. i have to Give a specific Bandwith on my SAP traffice . like when SAP traffice will come they all time get around 50 % bandwidth of my channel. If SAP resuest are not comming then other traffice will get full bandwith .
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Mar 20, 2012
How to get fiber optic modules for Cisco 2821 series router. I can not find anything apart a SFP module which contains only one SFP port.
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Mar 14, 2013
i've configured Cisco VPN CLient on a router 2821, and it is working fine.I could access inside resourses normally>the problem is that when i connect with VPN i lost connectivity to internet? What is wrong with my configuration? Below the running config of the router.
CISCO2821#sh run
Building configuration...
Current configuration : 5834 bytes
!
version 12.4
[Code].....
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Dec 18, 2012
I have a 2821 router and need to add another Ethernet port.
However, all the Ethernet modules seem to be End of Sale and the suggested replacements are only compatible with the ISRg2 range.
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Feb 9, 2013
When i connect the Router 2821 through the Consol get error message at regular interval of time %ENVMON-4-FAN_LOW_RPM: Fan 1 service recommended.
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Oct 3, 2010
We've got a cisco 2821 router which periodically stops routing all traffic. It seems to happen about once every 2 weeks, and I can't find anything that could be causing it. There are no entries in the log and the router stays up and running but requires a restart to begin processing traffic again. We're running 12.4(13r)T11.Any thoughts, or troubleshooting steps to track this down?
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Mar 12, 2013
I start configuring Cisco 2821 router for multicast . First short description and attached sheme explanation. Let we say I have small network with 100 users. One router and Cisco switch 3560. Two VLAN’s, one for data another for multicast. Data from internet works fine but now I want to connect multicast servers (or source of more multicast streams) from another subnet. Router have three interfaces.I expect there should be no problems with multicast configuration, but unfortunately it is not like I expect. What I did ?
First step: enable multicast routing
Second step: on both interfaces (Fe 0/1 and Fe 0/2) - ip pim sparse-mode
Third step: configure switch that users are connected to access port in VLAN 222 (temporary to see if multicast work)
When I start VLC on computer nothing happend. If I try to connect computer on same subnet where is source of multicast streams it works fine.What I am doing wrong ? Is there anything about routing ? All subnets are directly connected. RP is not needed if I have one router or ?
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Jun 25, 2012
I have just bought myself a Cisco 2821 ISR.At present in my home I have a Cisco 2621XM. Fast Ethernet 0/0 is connected to a 3524XL as a trunk to provide my LAN with inter-vlan routing. it works great. Fast Ethernet 0/1 is connected to my ISP's cable modem and uses the command "Ip address dhcp" to get an IP and all other info from my ISP.FA 0/1 is Ip nat outside and the FA 0/0 and all sub interface like 0/0.1 .24 .168 etc all ip nat inside.I get intervlan routing and access to the internet via this router.I have this 2821 to replace the 2621XM as I plan to run CME on it and want gigabit routing on my vlans as at the moment on the 2621 routing between vlans it at half duplex or seems to be.I have configured the 2821 to ip nat outside on gig 0/0 and ip nat inside on gig 0/1 and all of the sub interfaces (same setup as my 2621 but with gig ethernet)I have no access to the internet at all but I can ping www.google.co.uk and other domain names from the terminal session when I am connected to the 2821 via the console or telnet/SSH. the gig 0/0 has an IP assigned from my ISP too but no other nodes on the network can ping outside.Am I missing something here? the version of IOS is V 15.
My access list goes someting like
access-list 1 permit 10.0.0.0 0.255.255.255
access-list 1 permit 192.168.1.0 0.0.0.255
access-list 100 permit ip 10.0.0.0 0.255.255.255 any
access-list 100 permit ip 192.168.1.0 0.0.0.255 any
and so on
I still cannot access the internet.....
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Apr 11, 2012
The have around 80 staff and I think the current infrastructure is overkill for the size of the company. The current kit is old and they have no GB ethernet ports. They currently have:-
Core Switch:
1x Cisco c6509with a 48 port fast ethernet module (WS-X6248-RJ-45)
and an 8 port fibre module (WS-X6408A-GBIC)
I'm looking to replace this with something with 72 ethernet ports and 8 fibre ports
Access Switches:
2x 3500Replacement needs at least 48 ports and 2 fibre modules each
and 2x 5500Replacement needs at least 72 ports and 2 fibre modules each.
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Jun 7, 2012
I have a Cisco 2821 Router. Its ethernet Interface(E1) is connected to an ISP's Gateway.The outside interface IP is 207.x.x.1, The ISP has given 6 public IPs (202.x.x.1- 202.x.x.6) to use in LAN.
I have configured the router`s Internal Interface(E0) with a public IP address. (i.e. 202.x.x.1)
My Internal LAN PCs are in a private range of 192.168.1.0/24 subnet. Now I wanted my PC users to access the Internet while the Routers public IP remains on internal interface. How can I do the same?
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Dec 6, 2011
I have a 2Fe-2W Card and wanted to find out if it can be picked up and installed on a Cisco 2821? Below is the version
Cisco IOS Software, 2800 Software (C2800NM-ADVENTERPRISEK9-M), Version 12.4(8a), RELEASE SOFTWARE (fc2)
Technical Support: [URL]
Copyright (c) 1986-2006 by Cisco Systems, Inc.
ROM: System Bootstrap, Version 12.4(1r) [hqluong 1r], RELEASE SOFTWARE (fc1)
System image file is "flash:c2800nm-adventerprisek9-mz.124-8a.bin"
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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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Jan 31, 2013
I am in the process of upgrading our network switches and wondering if the .lic file will work with the new software or if I have to rehost for the move to 15.0. Its a remote site and I would like to get some solid info before I pull the trigger.
Also which IOS should I be upgrading to?
c3750e-ipbasek9-mz.150-2.SE.bin
or
c3750e-universalk9-mz.150-2.SE.bin
[Code].....
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Jan 15, 2011
We want to upgrade the IOS from 15.0(1) to 15.1 for some reason. Here is the output of my router's "show ver":
Cisco IOS Software, C2900 Software (C2900-UNIVERSALK9-M), Version 15.0(1)M4, RELEASE SOFTWARE (fc1)
Technical Support: [URL]
Copyright (c) 1986-2010 by Cisco Systems, Inc.
Compiled Thu 28-Oct-10 18:32 by prod_rel_team
ROM: System Bootstrap, Version 15.0(1r)M9, RELEASE SOFTWARE
[code]....
We have enabled the technology package license "uc" in the previous version, would it be loss after the upgrade?
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Jan 27, 2012
I have a 5412zl 10.215.x.x/16 Most of the connections on this switch are on vlan1. B9 is the port which is connected to a Cisco 2821 Router. The port on that end is GE0/1. The port on the cisco side is not a trunk but configure with an ip of 10.215.1.30/24 Its part of a some ip access group. The network that i now sit on is a 172.x.x.x/24 (behind cisco router, about 3 hops to that main 2821)We current have a system on my side that talks to a server on the 10.215. that has no issues. I'm trying to access some switches on the 10.215. and have had no luck reaching them.
Here is the access list that i found that port is configured to use:
permit ip 10.215.0.0 0.0.255.255 172.18.0.0 0.0.255.255 permit ip 10.254.0.0 0.0.255.255 172.18.0.0 0.0.255.255 permit ip 10.215.0.0 0.0.255.255 172.14.0.0 0.0.255.255 permit ip 10.254.0.0 0.0.255.255 172.14.0.0 0.0.255.255 permit ip 10.215.0.0 0.0.255.255 192.168.2.0 0.0.0.255 permit ip 10.254.0.0 0.0.255.255 192.168.2.0 0.0.0.255 permit ip 10.215.0.0 0.0.255.255 192.168.20.0 0.0.0.255 permit ip 10.254.0.0 0.0.255.255 192.168.20.0 0.0.0.255 I would think the first permit would allow me to get through to the 10.215 side but maybe i need to set something up on the hp size to let it know how to get back? I'm very new to this stuff.
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Jul 31, 2012
I have 2821 router configured with two subinterfaces. This router is connected on cisco 2960 switch. The trunk on 2960 is configured without any prunning of vlans. I noticed that udp broadcast traffic is being forwarded through my router on native vlan 1 (this interaface do not have ip address configured). Below is configuration:
Router:
interface GigabitEthernet0/0
no ip address
duplex auto
[Code]....
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Jul 2, 2012
Currently I have a network that looks like this:
ASA5510 - - - Internet - - - ASA5510
| |
EIGRP EIGRP
| |
2821 -----------MPLS----------1841
BGP
The MPLS connection is currently down, I'm trying to run a failover Site-to-Site VPN over the internet. All of the examples I've read have both connections involved in the failover coming out of one device. Since I'm not working that way, what is going to be the best way to failover? Do I need to set up some sort of IP SLA in the config? Or can I somehow weight routes in EIGRP in a way that the connection will failover from Internet to MPLS when the MPLS goes down and vice versa when the MPLS connection comes back up?
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Mar 10, 2013
What is the maximum VPN Clients that could be connected to cisco router 2821, with this IOS c2800nm-adventerprisek9-mz.124-20.T.bin
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Jan 14, 2008
I have a 3725 router that is reporting the following syslog message:
%FAN-3-FAN_FAILED: Fans had a rotation error reported.
When I do a show environment all, I am getting the following message:
Fan status: Warning- low fan rpm condition detected.
Both the the fans are functional and are rotating fine. How do I repair?
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Jan 4, 2013
I am currently running a 4506 with a sup V engine. I have purchased a sup 7 engine. Is there a guide on how to perform this task. I am sure I need to do an IOS update as well.
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Aug 30, 2012
we have two core swiches 6506 and around 55 cat 3550 switches. currently we are on the process of replacing the cat 3550 switches to 3750 switches.We need 10/1000/1000 speed, ip base image with upgrade options. Our up links from cat 3550s(sfps) are single mode and dual mode fiber mode with 1 gbps ports on core switch.
At present we are not upgrading to 10 gb modules on core. Spread over 15 floors each floor needs 2 up links(single mode , and dual mode). since cat 3750 sfps are smaller in size existing gibics cannot be used. Looking for the best option of cat 3750 switches with 1 gb up links which can be upgraded to 10 gb later when we replace the modle on core. Requirements:
1- Cat 3750 switches 55 in no with sfps for 1 gb up link (dual mode fiber and single mode fiber)
2- stacking option
3- 10/100/1000 speed
4- ip base image upgradable to ip service image
5- ipv6 compatibaility. Network is spread over 15 floors so from each floor we need two sfp up links 1 gbps using dual mode and single mode
-6-Should be upgradable to 10 gb in future when we upgrade the core modules
Or is it better to go for 10 gb module in core as well as edge switches ? if so what should be the modules?
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Jun 4, 2012
I am planning to upgrade my cat6500 using ISSU but can not find my doc to follow yet.
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