Cisco :: Flexible Netflow Configuration With IPSec 887
Oct 29, 2012
I am trying to configure netflow/flexible netflow on some branch site 887 routers which have a IPSec tunnel back to the main office. It is my understanding that the router will not encrypt traffic that it generates itself so the standard netflow will not work. The workaround I have seen is to use flexible netflow rather than standard.
I have tried to configure flexible netflow with the following configuration;
flow exporter EXPORTER-1
destination 192.168.10.1
source Vlan1
transport udp 9996
[Code]...
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Jan 28, 2013
I was working with Opmanager software to monitor my network, and i downloaded the Netflow plugin, i tried to enable the netflow on my core switch c3560 but I was surprised that it does not support the NetFlow, after many resersh most of URL's say it does not support until i found another URL from Cisco Says that it support Flexble netflow now, but i think we should update the IOS.
[URL]
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Oct 18, 2012
i want to activate flexible netflow on my WS-X45-SUP7-E with IOS cat4500e-universalk9.SPA.03.02.00.SG.150-2.SG. I've started with a simple configuration like this:
Configuring a Flow Monitor for IPv4/IPv6 Traffic Using the Flexible NetFlow
“NetFlow IPv4 Original Input” Predefined Record
SUMMARY STEPS
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Sep 2, 2012
we have a local Netflow collector working fine. We also have a centralised collector that we’d like to use to send the same Netflow data, but it is not being received. We need to send the data via an IPSEC VPN.
When I do a 'show flow-export counters' I can see the packets sent increasing. The local collector is receive netflow data. I am using the below config,
access-list global_mpc extended permit ip any any
!
!IP far end of VPN
[Code].....
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Nov 29, 2012
we have a Cisco ASA 5510 8.4, this device is reachable through a lan to lan IPsec vpn. We are able to activate the netflow export (we see flow export counters incrementing), but the flow is not passing through the vpn. Our netflow collector is on the other side of the IPsec tunnel so we define it linked to the internet interface.Is the export possible through the vpn? I read in a Solarwinds forum that it should not be possible.What ip address is choosen as source interface by ASA? Is there a way to force a source interface?
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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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Sep 6, 2012
I have a 4510 with sup7e and I would like to deploy netflow on this switch. The network will contain the 4510 switch where there will be 4 blades installed, each blade contains a separate Zone (vlan) . These 4 zones will then trunk upto a firewall via ten gig link over sub-interfaces. There will be an ip address assigned to each vlan on the 4500 switch but there can not be routing enabled between the vlans on the switch.
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Jan 21, 2013
Below is the show ver of 6509 switch , how to enable netflow
sh ver
Cisco IOS Software, s72033_rp Software (s72033_rp-IPSERVICESK9_WAN-M), Version 12.2(33)SXI7, RELEASE SOFTWARE (fc1)
Technical Support: [URL]
Copyright (c) 1986-2011 by Cisco Systems, Inc.
Compiled Mon 18-Jul-11 05:50 by prod_rel_team
[code]....
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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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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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Dec 4, 2012
I'm trying to setup an IPSEC tunnel above GRE using the topology in the attached image file.However the traffic between the 2 endpoints: lo0 on R5 (10.0.5.1) and lo0 on R4 is traveling via the GRE tunnel without being encapsulated in IPSEC: I'm using 2 routing protocols:
- OSPF area 0 for the connectivity between R1,R2 and R3
- EIGRP AS 1 for the internal sites connectivity
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Mar 2, 2012
Got some issues when setting up IPSEC/VPN on the asa 5505. I want to connect from the ipad with the built in IPSec client..Get errors when i run the debug crypto isakmp
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Apr 12, 2011
I am having a tough time getting my VPN client to reach any devices on my office network. I have a Cisco SR520 configured with IPSec to terminate Cisco VPN client sessions. The client is able to connect successfully. I get a username/password challenge, and then I get assigned a pool IP address on the client computer. So the VPN connection looks good at that point but I cannot reach any devices in the office network.
Config below:
Building configuration...
Current configuration : 8066 bytes
!
! Last configuration change at 06:14:35 PDT Wed Apr 13 2011 by admin
! NVRAM config last updated at 06:17:11 PDT Wed Apr 13 2011 by admin
!
version 12.4
[code]......
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Feb 10, 2011
Having a problem getting an ipsec tunnel to work between 2 asa 5505. This in one of the two configs.
Result of the command: "show run"
: Saved:ASA Version 8.3(2) !hostname 20Pullmandomain-name skeincenable password IKxxneNMTRgDw/Xd encryptedpasswd 2KFQnbNIdI.2KYOU encryptednames!interface Vlan1nameif insidesecurity-level 100ip address 172.16.1.70 255.255.255.0 !interface Vlan2nameif outsidesecurity-level 0ip [Code]...
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May 15, 2013
I am not having much success setting up a IPSec VPN tunnel between a RV042 V3 running v4.0.0.07 firmware and PIX 525 running 8.0(4) code.
Let's say the configuration looks like this:
The RV042 has public IP 70.0.0.1 and private LAN IP 192.168.1.1 /24 The PIX has outside IP 69.0.0.1 and inside LAN IP 172.16.0.1 /24 The RV042 is running as DHCP server on it's private LAN A Windows server at 172.16.0.2 is the DHCP server on the PIX's inside LAN.
I've tried every option on the RV042 for Phase 1 and Phase 2, but I am not certain how to configure the Advanced features especially Aggressive Mode, Compress, Keep-Alive, AH Hash Algorithm and Dead Peer Detection.
On the PIX I've tried the basic setup through ADSM, but it's not as clear or obvious to configure both sides with compatible settings compared to setting up a tunnel between two RV042s.
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Feb 2, 2011
To understand and configuring VPN setup to give secure access to my DB & Application Server exist in my Datacenter, to other Service Provider organisation. They need to access those DB & Application Server sitting at their company LAN itself.
My DC Setup :-
1. Core Router 7609 with SPA-IPSEC-SSC400-1 ( Cisco 6500/7600 IPSec VPN SPA Bundle 1 )
2. Core Switch 6513 with FWSM, ACE, SVC ( Network Analyser ), SUP 720
3. Distribution 6509 SUP 720
All the DB & Application Server connected to Distribution Switch in various VLAN,The Server support team from another company need the access to those, for that we will take MPLS link connecting out Core Router.
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Feb 8, 2012
I want to configurate cisco ipsec vpn client at asa 5505. At my asa the software version is 8.4. Any link or some material to config ipsec vpn client at asa 5505 version 8.4.
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Apr 29, 2013
We have dns server(only Internal IP) inside our network, right now we have configured Remote Access VPN using Public IP and we connect it using the same Public IP. I need to use FQDN instead using Public IP. What is the configuration for this.
-Device : ASA 5520
-Configuration Type : IPSec
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Sep 12, 2011
I configurated Ipsec vpn at asa 5510. my inside ip 192.168.10.156my public ip: 85.x.x.xmy peer ip : 62.x.x.x
the project is that:
the remote site want the interesting traffic like that:
source ip 172.16.1.104 can access destination ip 10.0.154.27
My inside ip is 192.168.10.0/0 and i can not to change it 172.16.1.0/24 and i can not to add this ip at my network.
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Oct 25, 2011
I have problems with a vpn configuration for point to point ipsec tunnel.Communication stops randomly, I have the ability to view any record or log of court?
model cisco router on a 877
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Apr 29, 2013
I tried any type of combination and just couldn't make it works. Only PPTP works well. Whether Apple iOS IPSec VPN is supported or not?
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Apr 17, 2013
I have configured the netflow to gathering flow from my cisco 2800 as below:
interface GigabitEthernet0/0
description ### To VNPT_FTTH_20M ###
no ip address
ip flow egress
ip route-cache flow
[Code]...
But i still not see users addresses(each individual hosts will go though) What and where i am configured wrong? I also attached here the map network.
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Jan 8, 2013
configured the monitor and exporter on the wcs 5508 running 7.4.100.0 and it is not working.
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Mar 1, 2012
How NetFlow works when NAT is enabled in the Cisco Router? ...the translation of IP addresses is done before or after save the packets in the flow caches?
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Jan 9, 2013
i just came to know Assurance feature license doesn't come for free when upgrading from LMS4.2 or NCS1.1. It has to be purchased. Before buying this license, i would like to know if IPv6 netflow is supported.
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Feb 5, 2013
I have an issue with Netflow that I have been unable to solve. I have an ASA5510 that is sending netflow data to a FogLight NMS and it works fine until I reboot the server. After the server is rebooted, the flows no longer are received until I reload the ASA. Once the ASA is rebooted, flows work fine. I can remove and reconfigure the netflow configuration on the ASA and that will start the netflow again, but that is painful.
Is there any way to easily stop/restart or re-initiate the netflow from the ASA easily?
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Apr 22, 2013
I see these errors on my 6500 router which acts as my server farm and has hundreds of servers connecting to it. I have just taken over these routers from another guy and think the errors may have been there for quiet awhile. I have another router which doen't seem to have these errors. Can you tell me how to turn off netflow? Will it cause any problems to my server farm? Is there a risk to the router if I disable something?
I ask this cause the server guys are having problems with certain servers. I am not sure if they are because of this or not. I really would like to clear the logs. [code]
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May 22, 2013
I was trying to get Netflow setup on one of my 7K VDCs and ran into a problem. While netflow data was reaching the collector, IP src/dst information was not appearing in the analyzer tool. I could not see any information about conversations. So I contacted the company that makes the collector/analyzer and the directed me to a blog on their site and told me to setup the 7K exactly as it is described in the blog post. I did and a bit later the ip src/dst address information appeared. So the only difference between the two configurations was that in the first case I tried to define a record and in the second case, no record was defined and instead the orginial-netflow parameter was used in the "flow monitor" section. [code]
I referenced the document "Cisco Nexus 7000 Series NX-OS System Management Configuration Guide,Release 6.x", Chapter 19 - Configuring NetFlow.It's clear to me that I didn't do something right in defining my own record since that's really the only difference between the config that worked vs the config that didn't. However, the documentation I referenced doesn't really provide useful information about how to create a record (above and beyond what I can already see by typing '?' at the CLI).
For example, the "match" command makes no sense to me. Usually when you have a match command it is accompanied by some sort of ACL. In the "flow record" section a match command would be something like "match ipv4 source address" but that's it. What does that mean? Match anything that has a IPv4 source address?? That doesn't make much sense. The collect commands are equally as bewildering. If I want to define my own record (and not use the original-netflow parameter) what do I need to do in the "flow record" sub-configuration to get Nexus to send ip src/dst information to the collector (which, I would think, is basic information to send - what good is netflow data without it)?
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Feb 7, 2010
I have a question regarding netflow and NAT. I have read some documentation (on ASR1000) regarding monitoring NAT process on Cisco ASR1000 that can be done using netflow version 9 (the term was called netflow event logging a.k.a NEL). The problem is, I have not found the netflow collector that can do that. I have queried several software such as manage engine "Netflow Analyzer" and Lancope, but they said their software can not do that.
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Jan 10, 2011
We have a 1841 router and would like to enable netflow. Will this degrade the router's CPU and memory performance.
1841>sh verCisco IOS Software, 1841 Software (C1841-IPBASE-M), Version 12.4(1c), RELEASE SOFTWARE (fc1)Technical Support: [URL] Copyright (c) 1986-2005 by Cisco Systems, Inc.Compiled Tue 25-Oct-05 17:10 by evmiller
ROM: System Bootstrap, Version 12.4(13r)T, RELEASE SOFTWARE (fc1)
1841 uptime is 1 day, 4 hours, 47 minutesSystem returned to ROM by power-onSystem restarted at 11:04:25 MYT Mon Jan 10 2011System image file is "flash:c1841-ipbase-mz.124-1c.bin"
Cisco 1841 (revision 7.0) with 114688K/16384K bytes of memory.Processor board ID FCZ113311Y62 FastEthernet interfacesDRAM configuration is 64 bits wide with parity disabled.191K bytes of NVRAM.31360K bytes of ATA CompactFlash (Read/Write)
Configuration register is 0x2102
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Apr 5, 2012
I am trying to setup Netflow to identify a problem I am having with a video conferencing system. Here are the commands that I have entered into the 6509 I am working on. I have checked this against another 6509 I have and these match. Not able to get netflow to show up on the solarwinds server. I have configured it to accept the netflow source coming from the 6509 I am working on.
ip flow-export version 9
ip flow-export destination 1.1.1.1 2055
ip flow-export sourc vlan 254
[Code].....
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Dec 13, 2010
how I configure netflow on a cisco 877 router.
I have an interface e0/4 that is 172.1.1.1 on router one (network one) which links to another router (onnetwork two) which has an interface of e0/4 172.1.1.2 which allows two networks to communicate. Network one is 192.168.0.0 /24 and network two is 10.255.255.0 /24.
How do i configure netflow to monitor the traffic going through these interfaces?
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Jan 12, 2011
I have a WS-C3560X-24P with this SW version 12.2(55)SE1. It has several L3 Vlan interfaces.How do I enable it to send Netflow traps?It does not support the ip flow-export commands.
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