Cisco Switching/Routing :: Netflow Configuration On 2821 Router?
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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Mar 13, 2012
Any major difrrence between Netflow v/s Netflow-Lite?
I am trying to understand if Cisco 4948E can do the same job as Cisco 4500E or not and difference between Netflow v/s Netflow-Lite will work for me to select correct product.
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Feb 18, 2013
I have a Cisco 2821 with two serial interfaces bundled using PPP multilink. I want to monitor traffic flow (net flow) on the multilink interface. I have tried configuring ip route-cache flow/ ip flow ingress / egress but no luck.The other thing is when I do sh ip cache flow I guess I should see the multilink interface in both Source and destination columns which is not happening (not showing in destination column).The other router with same config but with ATM sub-interface working properly (same IOS). Are there any hits on this ? Also, is it possible to use SPAN feature ? The monitoring server is at some other site (coming via WAN).
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Nov 10, 2011
I have problems in exporting translations of NAT from my router through NetFlow v9 ASR1006, to my server nfdump, any opensource or licensed software (collector) that I recommend.
ip nat log translations flow-export v9 udp destination 10.1.1.15 1181
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Apr 17, 2012
I have a router cisco 3825, it is configured with netflow for monitoring traffic with WhatsUpGold, but I can't monitor this router I don't know what is the problem.Device: Router Cisco 3825 IOS: C3825-ADVENTERPRISEK9-M 12.4. [code]
I have a switch4500 12.2 and a router 2801 IOS 15.1 and this device work well with the WhatsUp but these devices have the same configuration.I see diferents ouputs when I use show ip flow export, this output is for a router that work well with WhatsUp. [code]
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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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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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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 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 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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Mar 18, 2013
I have a SR520 just deployed at a remote site with Internet Access.
Working Environment:
Remote sites have SR520 with IPSEC VPN back to HQ and netflow v.5 works through the VPN back to our PRTG server.
Non-Working:
I cannot get Netflow data to our PRTG with this first SR520 implemented with Zone Base Security. I am not able to get my netflow traffic out. VPN is up and running. Internet is a dialer0 interface. I have a Kron job that does the copy run to tftp backup daily to the same PRTG server and it works fine.
Both my source interface and address on the TFTP command and the netflow commands are the same interfaces (VLAN75) and IP. The Destination ip is the same too (through the VPN tunnel).
Snipped:
flow exporter prtg
destination x.x.x.x
source Vlan75
[Code]....
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Feb 11, 2012
I am trying to figure out the Flexible Net-flow on Cat 4510R+E Switch running IOS-XE code. My Neflow flow software is manageengine 7.X. I am able to see the netflow interfaces but the traffic itself is not displayed. On the Switch I can see the netflow exporter statistics counter being incremented thereby confirming as being exported.
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Mar 17, 2013
I have a 370 with C3KX-NM-10G module & i want to enable NetFlow on it did the specified configs
Step 1 Flexible NetFlow Flow Recordsflow record miketestmatch datalink source-vlan-idmatch datalink dot1q prioritymatch datalink mac source-addressmatch datalink mac destination-addressmatch ipv4 versionmatch ipv4 tosmatch ipv4 ttlmatch ipv4 protocolmatch ipv4 source addressmatch ipv4 destination addressmatch transport source-portmatch transport destination-portmatch interface input physical snmpcollect interface output snmpcollect counter flowscollect counter bytescollect counter packetscollect timestamp sys-uptime firstcollect timestamp sys-uptime last flow record miketestegressmatch datalink destination-vlan-id match datalink dot1q priority match datalink mac source-address match datalink mac destination-address match ipv4 version match ipv4 tos match ipv4 ttl match ipv4 protocol match ipv4 source address match ipv4 destination address match transport source-port match transport destination-port match interface output physical snmp collect interface input snmp collect counter flows collect counter bytes collect counter packets collect timestamp sys-uptime first collect timestamp sys-uptime last Step 2 Flexible NetFlow Flow ExporterFlow exporter export-to-samplicatorDestination 10.1.1.8source Vlan1Transport udp 2055option interface-table timeout 60 Step 3 Flexible NetFlow Flow Monitors# Tie the Flow Monitor to the Flow Recordflow monitor mikektestrecord miketestexporter export-to-samplicatorcache timeout active 60flow monitor mikektestegressrecord miketestegressexporter export-to-samplicatorcache timeout active 60
& Applied it to g1/1/1 but without any luck , if netflow works on the
TenGigabitEthernet1/1/1 &
TenGigabitEthernet1/1/2
Only i have four switches stacked and nothing plugged to the
C3KX-NM-10G module
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Jul 23, 2012
router 7200 (12.2(33)SRE1)
two interfaces with traffic going through, placed in a Data-VRF
Another physical interface and loopback interface in the global routing-table.
ip flow ingress on all physical interfaces configured
It was running for at least a year: I was getting netflow packets on my analyzer from the box. Since a couple of weeks I get no netflow-packets anymore.debug ip flow export tells me "IPFLOW: Sending export pak to ... port 2055"
But the packet is not leaving the box. By setting up an ip sla monitor udp-echo I simulated some traffic (udp/2055) which is leaving the box.
[code]...
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May 8, 2013
I have 4506 with below sup, my requirement is to enable netfolw , but as i came to know that it is not supported in this sup, is there any additional option which can be explored to get the netflow working without replacing sup.
Card Type Model
-------------------------------------------------------------+-----------------------
Sup 6-E 10GE (X2), 1000BaseX (SFP) WS-X45-SUP6-E
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Apr 9, 2012
Ive tried to configure NetFlow on layer 2 without success. I configured the recondmonitorexporter like the configuration guide said. but still i dont receive any netflow traffic. I checked the firewall on the VM and it looks fine.
i have done the command under the ethernet interface :" layer2-switch flow monitor TEST input" - for layer2 input.
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Oct 23, 2011
Net flow on the Nexus 5596upI can't seem to find any information on the Nexus 5596 support of net flow. On Nexus 5596UP support of net flow ?
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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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Nov 12, 2009
If a Supervisor 6-E will support NetFlow on a Catalyst 4507R-E?If not, what are my options for NetFlow on a 4507R-E?
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Nov 3, 2011
To enable netflow export on ASR1001, do i need the firewall feaure license or not ?Docs are not really clear, NBAR requires FW license, but i am unsure about Netflow?
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Feb 6, 2012
I am trying to use the following commands on the switch but it is not supported:
ip route-cache flow
ip flow-export destination
Attached is the output for show version and show module commands from the switch.
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Jun 4, 2012
It is possible to configure the IOS NetFlow 122-58.SE2 in a Catalyst 3560?
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Dec 25, 2011
I need to know if Cisco Switch 2960 support Netflow. If it doesn't, how do I configure the switch to enable Netflow?
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Oct 30, 2011
I have a 3750E stackable swtch and I need to configure neflow on it. Are there any IOS versions that support netflow on the 3750E? Is there any possible to configure netflow on a 3750E? I do not see any netflow commands available on the switch?
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Jun 4, 2013
We have Cisco Catalyst 6509-V-E VSS Switch with Sup2T und IOS Version 15.0(1)SY2. We are gettin input netflow information from the gi2/3/7 but not output ... I am not sure why it does not work.
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