This trick works from any erspancapable switch including all of the cisco nexus switches as well as some catalyst switches and cisco routers. But esx sending data as gre transparent ethernet bridging when it must be gre erspan with erspan header. Download cisco nexus v virtual ethernet module for. The encapsulated remote switched port analyzer erspan enables you to monitor traffic on multiple network interfaces or vlans and then send the monitored traffic to one or more destinations. This is great if you want to send traffic to a sensor or if you want to take a closer look at it with a packet analyzer like wireshark. Erspan on the nexus 5xxx the rants of a data center. Dec 30, 2011 now, you can use the nexus 7000 and nexus 3000 as of nxos 5.
Vmware nsx for vsphere is built on top of vsphere distributed switch and cannot be run on top of cisco nexus v. Mystajones if youre not making mistakes, then youre not doing anything. We also help clients with virtualization and cloud computing on customized development, training. Does someone have the vmware esxi instruction how to add a new vmknic to. Has anyone worked with this sort of configuration before. For more information about configuring networking on the discover appliance, see the extrahop admin ui guide. Nexus 7000 erspan known working config the it networking.
Cisco nexus 7018 series switch on cisco nxos software release 5. As demand on deep packet inspection and analysis grew, so did the development on span and cisco cam up with rspan and. Transparency in the eye of the beholder with virtualization, vms have a transparent view of their resources. It was relatively painless, but definitely worth reading about what is involved. I think that this is the reason why cisco not forwarding this data to span destination port. Mostly use this for erspan and ordinary switching function. Cisco nexus 5000 series configuration manual pdf download. Erspan configuration on cisco ios xe span and rspan allow us to copy traffic from one interface to another. Upgrading the nexus v to sv i performed my first nexus v upgrade last week, upgrading from sv12 to sv. Ccie dc nexus 7000 erspan known working config hi mark, just to add, i was reading the nxos and cisco nexus switching book 2nd edition on page 406 towards the end and it says with erspan you must first specify an ip address that is used at the source ip of all gre packets. Capability l3control has to be specified for portprofile of erspan. It has redundant hot swapable power supplies, redundant hot swapable fans. Decapsulation erspan traffic with open source tools. The asr supports erspan source monitoring only on fast ethernet, gigabit ethernet, and portchannel interfaces.
Span session creating a span session on a nexus 9k. May 03, 2015 from another blog posting on another site. The first patch refactors the existing erspan v1s header structure, making it extensible to put additional v2s header. It sounds like from more investigation you would need the nexus v support contract to download this, based on what you are telling me that appears to hold true since you have nexus 7000 support contracts assigned to your cco but you cannot download it. Cisco nexus v implementation trainingjware download. The video demonstrates how to perform packet capture on cisco nexus v with span and erspan. Page 11 configuration example for an erspan source session configuration example for an ip address as the source for an erspan session configuration example for truncated erspan additional references related documents cisco nexus 5000 series nxos system management configuration guide, release 5. They have opened a trouble ticket with umbrella it to troubleshoot the issue. Span allows traffic on the same esxi host as the packet capture machine to be captured, while erspan allows the packet capture machine to be on a different esxi from a source or even multiple layer 3 hops away. Recently i worked on a project that monitor network traffic using spanswitch port analyzer sessions from cisco switches. Hi there, customer use hyperv on windows server 2012r2 with nexus v. Nov 28, 2015 erspan erspan is a cisco proprietary feature and is available only to catalyst 6500, 7600, nexus, and asr platforms to date.
Cisco nexus v advanced edition 23 download software v2. For example, a specific uplink can be shut down or a specific virtual port can have erspan. Erspan on the nexus 5xxx the rants of a data center crash. Port mirroring with a virtual nexus switch gfi software. Erspan erspan is a cisco proprietary feature and is available only to catalyst 6500, 7600, nexus, and asr platforms to date. The issue was first seen in a nexus 5596 running 6. Looks like the device doing your erspan doesnt know its. It also would be useful to understand the differences in headers produced by different equipment. Microsoft ata however does not currently support erspan and requires the gre be decapsulated by a switchrouter.
You can capture traffic from a virtual guest os running in vmware or hyperv by simply setting the guest oss. Cisco nexus v switch for vmware vsphere is available in two separate editions. Cisco nexus v virtual switch product overview the cisco nexus v virtual machine access switch is an intelligent software switch implementation for vmware esx environments. Used on asr sctp stream control transmissionprotocol wan widearea network qos quality of service sp switch processor. This roadmap is subject to change at the sole discretion of cisco, and cisco will have no liability for delay in the delivery or failure to deliver any of the products or features. The idea is to create vmknic on vswitch and migrate on the vds nexus afterword. Erspan my new favorite packet capturing trick packet pushers 3.
If you need better visibility into your network, download scrutinizer and be. In the configuration i can not see required erspan id and the frames are not recognized by the cisco gear. The annoyance is that whilst you can monitor the configuration of your nexus v through. Learn about support options and licensing for vmware cisco nexusv. Quick span with the nexus v posted on september 19, 20 november 19, 2014 by vallard today i thought id take a look at creating a span session on the v to monitor traffic. The umbrella it administrator can enable erspan on the nexus v to gain visibility into the vapp traffic. Sep 07, 2017 you can see cpu load for 5 min when i ran erspan on sup2t for a port having 500mbps traffic.
This chapter describes how to configure the local and encapsulated remote er switched port. The network segment command is a new command introduced in the cisco nexus v switch for microsoft hyperv. Rod gabriels tweet clued me in that my latest work for techtarget, vmware vswitch vs. After a few days in production the web vapp deployed by silver group is showing a performance degradation. Network segments are used to create layer 2 networks on the vsm. My company has created products like vsearch super vcenter, vijavang apis, eam apis, ice tool. The cisco nexus v mirrors traffic sent between virtual machines by sending erspan to an external cisco catalyst 6500 switch. I configured erspan from esx to cisco 6509 and can see now packets from esx host. Dears, i have a setup in the lab where i have configured erspan on cisco aci fabric which pretty similar to erspan on nexus switches 7k or 5k, i got the capture where i can see only the outer header for the packets but its not helpful. In the configuration i can not see required erspanid and the frames are not recognized by the cisco gear. Advanced edition adds advanced security capabilities and cisco virtual security gateway for nexus v switch to the base functionality of essential edition. Aug 27, 2014 upgrading the nexus v to sv i performed my first nexus v upgrade last week, upgrading from sv12 to sv. Intro to cisco nexus v free download as powerpoint presentation. What we are now trying to do is setup the erspan destination on a nexus 7k, then monitor the session to a physical interface and hand that off to ata as raw packets.
Overview of troubleshooting and packet capturing tools in. Encapsulated remote mirroring erspanid cisco nexus 5000 tomwinia sep 22. An erspan copy of cisco nexus 9300 series switch 40g uplink interfaces will miss the dot1q information when spanned in the rx direction. Apr 29, 20 the video demonstrates how to perform packet capture on cisco nexus v with span and erspan.
This document outlines the configuration for nexus v erspan sessions terminating on nexus 7000 and catalyst 6500 switches. Think about this, cisco v is an access switch connecting the serversjust on a virtual environment cisco nexus 5000 series. Cisco nexus v activation faqs cisco nexus v installation guides. Erspan is a cisco proprietary feature and is available only to catalyst 6500, 7600, nexus, and asr platforms to date.
Download the new protocol packs when available from cco from. So i want to decapsulatedecode the erspan packets where i can. Nexus 5000 switch with erspan enabled may see a slow leak in the monitor process, and that can potentially lead to an unexpected crash monitor hap reset. When troubleshooting the nexus v switch, there are a couple of different log bundles that can be generated within the environment.
This is ciscos first offering of high density, low latency 10 gigsec ethernet switch. If you have vsphere environment already operating with cisco nexus v and you are considering a jump to the api driven nsx world, this article will also help you understand the benefits and disadvantages of making that jump. The essential edition is available at no cost and includes all the basic switching features. Cisco nexus v system management configuration guide.
The asr supports erspan source monitoring only on fast. Erspan my new favorite packet capturing trick packet pushers. Cisco nexus v for vmware vsphere system management. The cisco nexus v series vem runs as part of the vmware esx or esxi. Sep 22, 2016 is the encapsulated remote mirroring compatible with cisco erspan. We had to work with a limitation of 2 x 10g port available on analyzer. With the cisco nexus v with our forthcoming release, you will have another alternative. For example, the headers produced by a nexus v switch configured with headertype 2 seems to differ from that produced by a 6500. Legal disclaimer many of the products and features described herein remain in varying stages of development and will be offered on a whenandifavailable basis. Everything is fine, but they think upgrade own server for windows 2016. Cisco nexus v virtual switch blog cisco data center. Nexus 5000 series switch erspan configuration example cisco. Implementing and configuring the cisco nexus v this fiveday course includes courseware based on 6.
Nov 29, 2016 hi there, customer use hyper v on windows server 2012r2 with nexus v. The following procedures explain how to configure an interface on an extrahop discover appliance to receive erspan traffic and how to configure the vmware server with the vsphere web client. This chapter describes how to configure the local and er ethernet switched port analyzer span. Cisco nexus v system management configuration guide, release 4. The course covers the key components and procedures you need to know to install, configure, manage, and troubleshoot the cisco nexus v switch. Implementing and configuring the cisco nexus and 5000. This vmkernel can be the same as the management vmk or it can be a dedicated interface. Cisco recommends that you install two vsms in an activestandby.
There is a gre header with protocol type set to 0x88be, but instead of a erspan header following it there is ethernet right away. The cisco nexus v is a virtual access software switch for vnetwork. Cisco nexus v for vmware vsphere system management configuration guide, release 5. Why erspan is important for network security plixer. Please reference this sample configuration for the cisco nexus 7000 series. Cos class of service erspan encapsulated remote switched port analyser. In true sysadmin form were both right and both wrong, of course, because it always depends on the situation, but i like the article. We will go through the concept of primary, secondary, isolated and community vlans, and experiment with server communication by placing the servers on different vlan. Cisco nexus 5010 series switch on cisco nxos software release 5. Nexus 7000 series switch erspan configuration example.
Logs can be gathered from each component of the nexus v switch the vsm and vems. Cscvf59161 n9k vpc erspan down destination reachable via peerlink. Erspan requires a vmkernel interface which is used as the gre tunnel source. Like other nexus switches, a techsupport file can be generated and downloaded from the vsm. Down and dirty network troubleshooting using traces vmware. Configure destination port destination cannot be a fex port or a portchannel. Is there any advanced options allowing to create this parameter. Dec, 2017 erspan has two versions, v1 type ii and v2 type iii.
Unfortunately, this verison isnt supported with the nexus v. Cisco nexus v, is up, wherein the inimitable david davis and i take opposing stances on vmware virtual networking. Configure the destination ip address in the erspan session. In a nexus v environment, it is not feasible to attach probe directly to the virtual switch. The nexus v provides vmlevel visibility and security for vmware server virtualization. I have a setup in the lab where i have configured erspan on cisco aci fabric which pretty similar to erspan on nexus switches 7k or 5k, i got the capture where i can see only the outer header for the packets but its not helpful. So you have to pick two critical switches and define span session destination on those 2 switches. The information in this document was created from the devices in a specific lab environment. In the first release of the cisco nexus v switch for microsoft hyperv. Transparency in the eye of the beholder with virtualization, vms have a transparent view of their resources 3. This is a long standing feature enhancement request to allow for easier capturing of traffic for monitoring and analysis as erspan allows you to statically place a network sniffer in the ip topology without having to relocate the sniffer to the local.
So i want to decapsulatedecode the erspan packets where i can see the inner header for the captured pkts. There is a bit that indicates the direction of traffic which seems to move to a different location on the v. How to configure cisco span rspan erspan with examples. Looks like the device doing your erspan doesnt know its rfcs. This patch series add support for erspan v2 based on existing erspan v1 implementation. This guide explains how to configure erspan on an extrahop discover appliance with a cisco nexus v switch that is running on a windows machine. Steve jin, vmware vexpert who authored the vmware vi and vsphere. Erspan with nexus v in a virtualized data center encapsulated remote span, or erspan can be used to monitor traffic remotely.
This software switch is embedded in the kernel of esx on a server to deliver vmaware network services. Span allows traffic on the same esxi host as the packet capture machine to be captured, while erspan. Should you, or someone you know, need these products and services, please feel free to contact me. How to configure cisco span rspan erspan with configuration commands having visibility in the traffic flowing through your network from specific hosts is an excellent way to troubleshoot problems or gather useful information and data. So the erspan header is missing, and the decode fails for any tool that tries. Is the encapsulated remote mirroring compatible with cisco erspan. Having scoured the internet and drawing a blank when looking for a simple process to follow when adding a vlan and subsequent vmware vm access port group and to a cisco nexus v switch, i ended up stitching together the cisco commands after reading lots and lots of cisco nexus configuration guides. For a comprehensive list of vmware vsphere features download the key features summary. At the end of the video, we will also go through a scenario where we have two sets of private vlan.
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