Cisco :: 7606 / 2811 - SNMP And Netflow Difference Displaying Different Data For Same Interfaces
Nov 29, 2012
I've got an issue with SNMP and netflow tools. They are displaying different data for the same (sub)interfaces.I've got metroethernet link which connects root A (Cisco 7606, 12.2(18)SXF8) and root B (Cisco 2811, 12.3(11)TS). MPLS is configured on the link (behind root B there is no more MPLS). I'm attaching root configurations (I've ommited parts of config).Interfaces are:
Root A - gi2/6.2144
Root B - fa0/1
I've configured SNMP and netflow on both devices. I'm using two SNMP tools (CA Spectrum and eHealth) and two netflow tools (CA NetQoS Reporter Analyzer and Fluke Networks NetFlow Tracker) to collect the data. SNMP tools show the same info for defined (sub)interface.Netflow tools also show the same info for defined (sub)interface. I'm attaching reports from one SNMP tool and one netflow tool for the same time period.
1. Looking at SNMP tool, it can be seen quite amount of that data in both in and out direction.
2. Looking at netflow tool, it can be seen quite amount of that data in out direction, while in direction shows small amount of data.
I'm aware that Cisco has difficulties with SNMP counters on subinterfaces. I'm also aware that MPLS netflow has its own difficulties.Root B netflow configuration is quite simple as it has just 2 interfaces to configure netflow on (Fa0/0 and Fa0/1). So I would guess SNMP and netflow data should match, but they don't. When you look at SNMP tool reports for roots A and B, it can be seen that traffic volume is practically mirrored.
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Aug 17, 2011
Cisco 2951 w/ HWIC-4ESW
IOS 15.0(1)M5
#sh ip flow int
Vlan533
ip flow ingress
ip flow egress
#
The SVI sends the flow data just fine, however I also continue to receive flow data from most other interfaces.
I have attached a screenshot of one of our netflow collectors indicating that many of the interfaces are sending flow data even though not configured to do so. We have two different netflow collectors, from different vendors and both confirm the same interfaces sending flow data.
Normally I wouldn't care and ignore it, however one of them uses a license limit by interface and is a bit problematic.
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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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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
[code]....
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Mar 18, 2012
I would like to run some NetFlow monitoring on a few sub interfaces on a router. This is a 7301, with an NPE-G1.What I want to know is, does Cisco have a page anywhere (because I can't find one) that lists typical additional CPU and memory loads one can expect when enabling NetFlow on an (sub)-interface; perhaps for a given speed (Mbps) and/or number of flows?I don't want to enable NetFlow and then bring the device to a grinding halt, how can I know what sort of overhead to expect?
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May 17, 2013
How can i enable Netflow for each Vlan Or interface indvidually in Cisco ASA? currently i have setup Netflow and only 2 interfaces are shwoing traffic for Netflow which are not even as my physical or Vlan interfaces . (see screen shot )
EscapeASA# sh interface ip brief
Interface IP-Address OK? Method Status Protocol
Internal-Data0/0 unassigned YES unset up up
[Code].....
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Jun 26, 2012
I've configured N7K to export layer 2 flows. Using 2 different flow collectors (open source and commercial), gaps/drops in the reported traffic are observed on a periodic basis.Problem doesn't seems to be with the exporters, hence I wondering if netflow configuration on N7K can be tweaked to address this symptom. Using the 'show exporter' command, no errors/drops are observed. [code]
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Feb 14, 2011
I'm trying to gather netflow data over an IPSEC VPN and through my research I've learned that I need to configure Flexible Netflow. However, I have a Cisco 2801 router with the latest ROMMON and IOS and the Flexible Netflow options aren't available.
For instance:
flow exporter dwtmonitor
destination 10.0.16.172
source Loopback0
transport udp 2055
output-features
When I type "flow exporter <name>" it only allows me to enter "flow <name>" and there's no "destination" options or anything else.
ROMMON: 12.4(13r)TIOS: 12.4(25d)
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Nov 9, 2012
I am trying to fetch data on netflow analyzer 9 by Cisco router 2911. But netflow is unable to show any data.
cr2911-01#sh runn | sec ip flow
ip flow-cache timeout active 1
ip flow-export version 5
ip flow-export destination 10.1.208.32 9996
[code]...
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Aug 19, 2012
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Apr 26, 2013
I am trying to get my Cisco 2811 to authenticate four DSL connections and load balance them by attaching the four DSL to a switch (each DSL going to a seperate VLAN) and then trunking all four VLAN's to a ethernet interface on the 2811. My issue, I can not get more than one DSL to authenticate at a time, for example Dialer1 will connect and then it will disconnect and Dialer2 will connect, etc... I have the modems in bridge mode and I am using seperate user/pass for each DSL account and I have verified that the user/pass are correct.
Below is my config from the router and a couple of messages that came across the console.
*Apr 27 01:12:11.915: %DIALER-6-UNBIND: Interface Vi2 unbound from profile Di1
*Apr 27 01:12:11.927: %LINK-3-UPDOWN: Interface Virtual-Access2, changed state to down
[Code].....
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May 26, 2013
I have a Cisco 2811 router with 2 ADSL interfaces and we have 2 internet lines associated with it. One is with Telstra and one is with iiNet. All internet traffic from inside the office is routed through Telstra line. The iiNet line is used for incoming emails, establishing VPN etc. The problem is that we are not able to "PING" the iiNet's IP address from the outside world however, PING works for Telstra IP. What do I need to configure on the router if I want to PING and Putty in the router using both Telstra's and iiNet's IP from outside world?
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Jun 7, 2011
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My managment-system (with a mrtg lookalike function) is collecting data from the CMTS every few minuts collecting data regarding data in downstream and upstream, total of modems and so on.
The problem I have seen is that the CMTS is not giving me the correct data when a ED3.0 modem is downloading or uploading.
E.g:
ED3.0 downloading with a speed of 100mbps:
snmpwalk -c COMMUNITY HOST -v 2c .1.3.6.1.2.1.31.1.1.1.10.1025
IF-MIB::ifHCOutOctets.1025 = Counter64: 3299718
[Code].....
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Jun 20, 2012
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Feb 13, 2012
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Nov 21, 2012
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Computers are connected to san through switch.
SAN: Equallogic PS 4100 E
Switch: Dell Power Connect
Computer: Dell T610
OS: Centos 5
Virtualization: Kvm
NIC: 8
I am not sure about network card brand now.
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May 18, 2011
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Another question I have out of curiosity. Is it possible to make the controller T1 port of a VWIC 1MFT-T1 or a VWIC 2MFT-T1 act as a fast Ethernet.
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Apr 18, 2012
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Jun 6, 2012
We are facing output queue problems on our ATM interfaces. A lot of output queue errors are been shown as below.
Cisco 2811 -> ATM Link -> <-ATM Link <- Cisco 3945 Routers.
Cisco 2811 Version is 124-15.T9.bin
Cisco 3945 Version is SPA.150-1.M1.bin
Cisco 2811 Output Errors
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Apr 5, 2011
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Mar 11, 2013
Cisco Prime LMS 4.2.3 is sending SNMP request too big for asa interface buffer.LMS is running on Windows server incoming SNMP request (528 bytes) from IP address x.x.x.x Port 50592 Interface "inside" exceeds data buffer size, discarding this SNMP request.
212005: incoming SNMP request (%d bytes) from %s exceeds data buffer size, discarding this SNMP request. It is very much like this error
Error Message %PIX-3-212005: incoming SNMP request (number bytes) on interface interface_name exceeds data buffer size, discarding this SNMP request.
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how do I change the SNMP request size in LMS? I can only find the following that might be an option
[URL]
just using default settings with snmpv3
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Sep 7, 2012
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Mar 23, 2013
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May 24, 2012
I have to configure router 2811 for Data and Voice network.However I have only one Fast Ethernet interface. [code]
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Apr 17, 2012
We are using LMS 4.0 with license of 100 Users. We are managing 12 devices till now. But from last two days I am trying to add a device ( i.e. 2811 router) and after adding the device in DCR (Inventry> Device Administration>Add/Import/ Manage Devices) it displays message i.e. devie added succesfully. But this added device is not displayed in Inventry> Device Administration>Add/Import/ Manage Devices.
observation :
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2. New added device is reflecting in Known device list if we generate a report for know device ( under path Reports>Invenrty>Management Status>Known Device List).
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Feb 14, 2012
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Aug 18, 2012
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Jan 30, 2011
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Mar 5, 2011
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Aug 25, 2012
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Oct 6, 2012
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Apr 17, 2012
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I have tried and deleted and added the stack in CiscoPrime, but with same result.
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Sep 13, 2011
Why aren't the fa ports that i assign to a voice vlan showing up when i issue show vlan?
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