Cisco Switching/Routing :: 3750X Netflow Packets Are Not Being Exported To Server After Update

Feb 5, 2012

Basically I have netflow which i'm trying to use to export to a netflow collector. I'm pretty sure that the 3750-X does support netflow. I've recently updated IOS on the 3750-X to support flexi netflow.For some reason the netflow packets are not being exported to the server. I'm using Opmanager which should present the netflow stats in the form of a graph. I'm using a universal IOS image. (C3750E-UNIVERSALK9-M), Version 12.2(58)SE2 3750-X WS-C3750X-24T-S

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Cisco Switching/Routing :: 7200 - Netflow / Packets Not Sent?

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.


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Cisco Switching/Routing :: NetFlow / 6500 / Export Packets Were Dropped Due To No Fib?

Mar 13, 2012

I have a problem with the 6500 not exporting netflow data. They are not exported due to no fib.I have read somewhere that this has something to do with VRF. VRF are running on the router.ip flow ingress has been applied to desired ip int.Is there anything I could do to make it export netflow data?
VSS-core-XXX-rs1#sh ip flow export
Flow export v5 is enabled for main cache
  Export source and destination details :
  VRF ID : Default
    Source(1) (Unknown)


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Cisco Switching/Routing :: Netflow Support On 3560 / 3750X Platforms

Feb 8, 2012

I'm looking at implementing a new DMZ and wanted Netflow capability for security monitoring.The architectural principles I have to adhere to dictate that the switches within the DMZ are layer 2 however to get Netflow I need a minimum of a 3560/3750X, Network Services module, IP Base IOS with ip routing and CEF enabled.To do this and still keep the switch functioning as a layer 2 device the intention was not to configure SVI's or any static/dynamic routing protocols.Will Netflow still work in that scenario?

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Cisco Switching/Routing :: 3750x 24s Not Forwarding Packets

Mar 1, 2013

We have a 3750x 24s acting as a root switch for about 10 other 3750x's. Everything else seems fine, but the device stopped forwarding packets to the applied static route. [code]

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Cisco Switching/Routing :: 3750X Switches Dropping Packets On Uplink Interface?

May 9, 2013

We have a remote site that is using 3750X switches as layer 2 switches back to our home site.  The uplink port is showing dropped packets but the utilization on the link is never about 10%.  We have a 100Mb circuit to this site.  Our speed tests and iperf tests are not showing any issues that we can see.  However the port is still droping packets.  It is not dropping at a high rate but they are dropping.          
switch#sh platform port-asic stats drop gi1/1/4
  Interface Gi1/1/4 TxQueue Drop Statistics    Queue 0      Weight 0 Frames 0      Weight 1 Frames 0      Weight 2 Frames 0    Queue 1      Weight 0 Frames 52876      Weight 1 Frames 2      Weight 2 Frames 0    Queue 2      Weight 0 Frames 0      Weight 1 Frames 0      Weight 2 Frames 0    Queue 3      Weight 0 Frames 0      Weight 1 Frames 0      Weight 2 Frames 1330874    Queue 4      Weight 0 Frames 0      Weight 1 Frames 0      Weight 2 Frames 0    Queue 5      Weight 0 Frames 0      Weight 1 Frames 0      Weight 2 Frames 0    Queue 6      Weight 0 Frames 0      Weight 1 Frames 0      Weight 2 Frames 0    Queue 7      Weight 0 Frames 0      Weight 1 Frames 0      Weight 2 Frames 0switch#
Is there a way to capture these dropped packets to see what they are?  We do have VOIP phones at the site and are using Qos.

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Cisco Switching/Routing :: 3750X Rolling Stack Upgrade / Update

Mar 19, 2013

This feature doesn't work as advertised on the Release Notes and other documentation.  After 12 hrs of lab work and a tlwo day support call to TAC, they finally came back to me that:
  IOS Upgrade works well if you use the command force-reload, without force-reload, it won't work.  --"of course with this command the complete stack will go down and the purpose of RSU will not serve"   
Then they pointed me to a bug that I could not find in the bug tracker unless I searched by the bug ID number ??   CSCua78897
Unfortunately this bug has a closed status and is not slated to be fixed ? 

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Cisco Switching/Routing :: 4948 - Difference Between Netflow / Netflow-Lite

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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Cisco Switching/Routing :: 3750X - IPBase And GhostCast Server

Jul 23, 2012

I imagine this question has been posted a million times before but here goes.  I am trying to image a number of machines via Ghost Cast server across a 3750X stack running multiple V LAN's.  I am running the IP BASE image so am aware that multicast functionality is limited.

 I am running 12.2(55)SE3. I have tried adding both V LAN's into an IGMP group using the "ip igmp join-group" command which shows both V LANs as part of the group but to no real effect.  To be honest though I am clutching at straws!  I'm just starting to read through the documentation so hopefully that will work.

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Cisco Switching/Routing :: 3750X / DHCP Server Not Handing Out Specific IPs

Apr 17, 2013

I have a DHCP server for a subnet that has only lightweight WAP's in it.  The DHCP server is running on the gateway for this subnet which is a 3750X 2 switch stack running 12.2(53r)se2.I have the following configured:

ip dhcp excluded-address
 ip dhcp pool DHCP-VL20
ease 3
The server hands out up to 18 IP addresses and no more, with 20 devices on the subnet.  Scanning the subnet with a 3rd party network management system I see the following IP's never get handed out or used: - 162 (manually excluded) - 168 - 176
and of course  2 IP's I have manually excluded, 11 IP's in all that wont get handed out.  It should only be 2 that don't get handed out.  I've double and triple checked the exclusion and thats the only one.  so I run a 'sh ip dhcp pool' and see this:
Pool DHCP-VL20 :
Utilization mark (high/low)    : 100 / 0
Subnet size (first/next)       : 0 / 0
Total addresses                : 30

[edit]I should also mention that "sh ip dhcp bind" does not show these randomly excluded IP's in use.  They also do not show up in any arp table I can find.I have looked all over the config and I cant find where these extra 9 addresses are being excluded. how to free up these 9 seemingly random exclusions?  Haven't issued a reload and I haven't deleted and rebuilt the DHCP server yet, production network.

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Cisco Switching/Routing :: Catalyst 6500 Update And HTTP Server?

Mar 24, 2013

cisco WS-C6509-E Core switch with IOS  "s72033-ipservicesk9_wan-mz.122-18.SXF11"
i have 2 question 
Q.1 i want to upgrade this switch what is the latest IOS ver. supported by this module ?
Q.2  i need to enable http server on this switch when i run this comman it's accsebt but i cant get http work

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Cisco :: 4507 - NetFlow Exporter Stops Sending Packets

Nov 4, 2012

Have a Cat 4507 with Supervisor 7-E, setup configuration to send NetFLow information to an external server, everything worked great but after 2 weeks, the exporter is showing zero packets sent and the following error is at the console:

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Cisco Switching/Routing :: Netflow On SR520

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.
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).

flow exporter prtg
destination x.x.x.x
source Vlan75

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Cisco Switching/Routing :: Netflow On Cat 4510R+E With IOS-XE?

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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Cisco Switching/Routing :: How To Enable NetFlow On 3750

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 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 &
Only i have four switches stacked and nothing plugged to the

C3KX-NM-10G module

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Cisco Switching/Routing :: Enable Netflow Fo 4506

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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Cisco Switching/Routing :: NetFlow Layer2 On Nexus 7k

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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Cisco Switching/Routing :: Netflow On Nexus 5596

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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Cisco Switching/Routing :: NetFlow On Catalyst 4500-E Series

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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Cisco Switching/Routing :: How To Enable Netflow Export On ASR1001

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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Cisco Switching/Routing :: NetFlow Command Support On C4503?

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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Cisco Switching/Routing :: Configure The IOS NetFlow 122-58.SE2 In A Catalyst 3560?

Jun 4, 2012

It is possible to configure the IOS NetFlow 122-58.SE2 in a Catalyst 3560?

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Cisco Switching/Routing :: Does Catalyst 2960 Support Netflow

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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Cisco Switching/Routing :: 3750E NetFlow Commands Available On Switch

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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Cisco Switching/Routing :: 6509 - Not Getting Output Netflow Information

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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Cisco Switching/Routing :: Nexus 7010 NX-OS 5.2 Netflow FPS Information

May 22, 2012

How to get a summary of netflow statistics on NX-OS? On IOS you could do sh ip cache flow which would show what I need? Can't find a similar command on the Nexus Platform.

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Cisco Switching/Routing :: NAT Translation Netflow V9 - Router ASR1006

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 1181

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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 secondary
ip address secondary
ip address secondary


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Cisco Switching/Routing :: Nexus 5000 Support Of Netflow

Jun 8, 2009

I can't seem to find any information on the Nexus 5000 support of netflow. I assume that means it doesn't do netflow.

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Cisco Switching/Routing :: 3825 Router - Netflow Isn't Working With WhatsUpGold

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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Cisco Switching/Routing :: Unable To Enable Netflow On Cat 4503-E (Sup7-E)

Dec 17, 2011

I am working with a Catalyst 4503-E with a Sup7-E. I'm trying to enable Netflow, and I have read the following guides: Catalyst 4500 Series Switch SW Configuration Guide, Release IOS ...
I have also enabled Netflow in IOS 12.1/12.2 and figured the process was similar (It seems to be). CEF is enabled, and I have all the pre-reqs according to the document above, however, the flow commands don't exist, they simply say "command unrecognized". I have included my sh version below.
sh version (edited):
Cisco IOS Software, IOS-XE Software, Catalyst 4500 L3 Switch Software (cat4500e-UNIVERSAL-M), Version 03.01.01.SG RELEASE SOFTWARE (fc1)


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Cisco Switching/Routing :: 7606 / Netflow TCAM Threshold Exceeded

Nov 6, 2011

following errors.
Nov  7 21:34:50: %EARL_NETFLOW-SP-STDBY-4-TCAM_THRLD: Netflow TCAM threshold exceeded, TCAM Utilization [99%]
Nov  7 21:44:44: %EARL_NETFLOW-SP-4-TCAM_THRLD: Netflow TCAM threshold exceeded, TCAM Utilization [91%]
I've already found this kinds of cases, in this community. So, It seems that Changing the current configuration to 'mls aging fast threshold ## time ## ' is most suitable in our situation.But, I don't know how to calculate the apt threshold value and time value.
[1] sh run | in mls
mls ip multicast flow-stat-timer 9
mls flow ip interface-full
no mls flow ipv6
no mls acl tcam share-global
mls cef error action freeze


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Cisco Switching/Routing :: Different Netflow Export Profiles On Cat 6513 With Sup720

Aug 28, 2012

Is it possible to have one netflow export profile (may not be the right word...) to send all the flow information to one collector and another profile to only send traffic to and from centain IP addresses to another collector? If it is possible on the hardware and software, any quick sample config?
#sh ver
Cisco IOS Software, s72033_rp Software (s72033_rp-ADVIPSERVICESK9_WAN-M), Version 12.2(33)SXH4,
#sho module 7
Mod Ports Card Type                              Model              Serial No.
--- ----- -------------------------------------- ------------------ -----------
  7    2  Supervisor Engine 720 (Active)         WS-SUP720-3B       SAL1115LJBR
Mod MAC addresses                       Hw    Fw           Sw           Status
--- ---------------------------------- ------ ------------ ------------ -------
  7  0017.9444.9814 to 0017.9444.9817   5.3   8.4(2)       12.2(33)SXH4 Ok
Mod  Sub-Module                  Model              Serial       Hw     Status
---- --------------------------- ------------------ ----------- ------- -------
  7  Policy Feature Card 3       WS-F6K-PFC3B       SAL1115L2NH  2.3    Ok
7  MSFC3 Daughterboard         WS-SUP720          SAL1115LH7W  2.6    Ok

Mod  Online Diag Status
---- -------------------
  7  Pass

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