Reference architecture optimal network designs with cohesity. The following topologies are valid for these nxos versions. The first section deals with the supported nexus 50005500 fex topologies. The fex, unlike a traditional switch, has no capability to store a forwarding table or run any control plane protocols.
The diagram below clearly illustrates the differences in both logical and physical topology between a non vpc deployment and a vpc deployment. These locations are composed of regions and availability zones. Introduction to fex and cisco nexus commands free download as powerpoint presentation. Currently this is a manual process configuration is done separately on. In this topology, servers would be dual homed to multiple fex. This is the first of a series of four blog posts that i plan to publish over the coming weeks. This pdf is about comprehensive coverage of the cisco nexus. Another theme was that the vntags former cisco term and vnlink technology present in the nexus 2k fex are logically present in the cisco v, and literally present in the cisco nic adapter technologies named adapter fex and vm fex. One goal of the talk was to provide fairly solid coverage of vpc and fex nexus 2000 designs and best practices. Nexus 2000 fabric extenders supportedunsupported topologies.
The vpc links facing the cisco ucs fabric interconnects, po and po14, do not carry any fcoe. Cisco nexus 20007000 vpc design options anas tarsha. Lets see the topology example where the fex is connected to the switches with vpc dualhomed fex. A fabric extender fex for short is a companion to a nexus 5000 or nexus 7000 switch. The vpc keepalive link is any layer 3 interface, including the mgmt0 port, that is used to send udp pings between the vpc peers. Cisco aci tutorial a configuration guide rednectars blog. The cisco nxos software has been designed to allow an upgraded dualhome fex to interoperate with vpc secondary switches running the original version of cisco nxos while the primary switch is running the upgrade version. Otherwise, youre stuck with an extended layer two topology by way of nexus. Physical diagram fabric extenders and parent switches. Cisco ucs and nexus 9000 switch infrastructure 1 executive summary enterprise data centers are already realizing the tremendous benefits of server and storage virtualization solutions to consolidate infrastructure, reduce operational complexity, and dynamically scale application infrastructure. Make sure you follow my blog so you dont miss out on the continuing story. The two nexus devices present as a single channel to each firewall.
When the port is admin down the packets are successfully sent via the peerlink. Switch vpc topology and straight through fex topologies host vpc. It relies on its parent 50007000 to perform those functions. In this case nic on server must support lacp so that the two fexs appear as a single switch. When exiting, pka, pl, and vpcs will be reinitialized.
Hp virtual connect flex10 and nexus vpc virtual portchannel. Aug 03, 2012 the picture above hows the supported vpc topology for the nexus 7000. May 07, 2012 bogo, you can do vpc to the host as of the enhanced vpc update in a dualhomed fex topology, as posted above. Jun 16, 20 there are certain differences as listed below. In this topology, a server would be connected to a single fex, but could be multihomed to a 2nd fex. Depending on the model of firewall there may be a link between them to maintain state. Fabric extenders fex overview posted mar 20, 2014, 7. Data center design with cisco nexus switches and virtual. Designing for vpc, fex, and datacenter virtualization.
Data center access design with cisco nexus 5000 series. Topology c is called straightthrough vpc in which each nexus 2000 fex is connected to one parent nexus 7000 while the server is dual attached to a pair of nexus 2000. We choose the activeactive solution because vpc provides seamless switchover and faster convergence in case of switch. Hp virtual connect ethernet modules will work seamlessly with cisco nexus infrastructures and this new network design. Bd new question 408 which two fex topologies trade deterministic. Cisco nexus 2300 platform fabric extenders data sheet. With this configuration, only the fex with that particular serialnumber can be connected to these ports, and receives this configuration.
Even though it says its a 10gbps port fex you can configure the fex non uplink ports as 1gbps shutdown the port and change speed on the nexus 5ks instead of using the maxlinks 1 is the default control under the fex commands, use a portchannel and have that do. Cisco aci tutorial a configuration guide cisco aci tutorial part 1 note. Best practices for virtual port channels vpc on cisco nexus 7000 series switches. In the flexpod topology both cisco ucs fabric interconnects and netapp storage systems are connected to the cisco nexus 7000 switches through vpc. We can see that the nexus 2200 shipped with nxos 4. Cisco nexus 50007000 fex topologies jeremy waldrops blog. In a vpc topology, all links between the aggregation and the access layer would be forwarding and part of a virtual portchannel. Cisco content hub cisco nexus 5600 series nxos software. Dears, please find the attached state of a fex nexus. Data center access design with cisco nexus 5000 series switches.
Cisco nexus 5000 series configuration manual pdf download. The picture above hows the supported vpc topologies for the nexus 5000. Jan 08, 2012 one important feature is that the fex port configuration needs to exist on the both n5ks. It is strongly recomended to always cross reference this document with the nxos specfic release notes to avoid any confusion. Select a device on the map, click or to show the neighbor dialog. What also isnt clear from the picture is whether the firewall is l2 transparent or l3 routed and whether the firewalls are set up activeactive or active. Hence all the singly connected hosts via the fex also lose connectivity to the network. With its nexus 2000 fexes as the representative, cisco fex functions to extend the switching fabric of the core and aggregated switches nexus 50007000 series switches. The output of this command provides details as to the software versions, operational configuration, uplink status, and much more. Aug 28, 2012 a fabric extender fex for short is a companion to a nexus 5000 or nexus 7000 switch. Provides verbose status information about a particular nexus 2000. Also, in my testing, there has been no such disruption when failing between 5ks. Topology map create dynamic l3l2 map you can also drag and drop devices from the site pane to create a new topology map.
Fex topology example all hosts are dual homed to fex two fex per rack both fex are dual homed to two parents two virtual access switches virtual access switches are dual homed to aggregation switches. Each fex is has multiple links to a pair of 5k switches in the same vpc domain, and a single vpc portchannel is configured down to the fex. When the local link of a fex vpc is phy down packets are not forwarded via the peerlink and are dropped on egress. As the name implies, the fex extends the fabric ie, the network out.
If the cisco nexus 5500 platform is used in conjunction with the layer 3 engine, at the time of this writing cisco nxos 5. The server is connected to the port 30 of the n2248tp fex. Aws network architecture simplest way to guarantee uptime. With the introduction of the enhanced vpc, the three topologies supported by a cisco nexus 5500 series device and fex are the singlehomed fex topology, the. May 05, 2014 the vpc primary switch is running the upgraded version and the vpc secondary switch is running the original software version.
Introduction to fex and cisco nexus commands network switch. Comprehensive coverage of the cisco nexus switches pdf. And when it comes to configuration, you can just configure e10011 on each 5k. Gigabit ethernet connectivity would make use of the fabric extenders concept. Apr 10, 2019 the document describes the various topologies supported when the nexus 2000 fabric extender switches fex used when it is connected to the parent switches or to the end hosts. Hp virtual connect flex10 and nexus vpc virtual portchannel configuration this paper will outline the steps to configure the virtual connect flex10 modules and cisco nexus 50007000 series switches as a virtual portchannel. Similar to the netbrain rich client, you can extend neighbors dynamically to expand the map. View and download cisco nexus 5000 series configuration manual online. The topology diagram depicts two nexus 5k acting as parent switches with physical connections to two downstream nexus 2k fex acting as the 10g physical termination points for the connected server. Aws network topologyarchitecture linkedin slideshare. Randy, yes, youre describing an orphan port scenario, which is a big reason to dualhome your fexes.
Running configuration example for a vpc straightthrough topology. Amazon ec2 is hosted in multiple locations worldwide. To solve this problem, fex can be connected to two cisco nexus 7000 series switches in activestandby mode or activeactive mode vpc. The cisco nexus b22dell blade fabric extender is designed to simplify data center server access architecture and operations in environments in which thirdparty blade servers are used.
Nov 03, 2011 with straightthrough fexs, you know the fexs are a pair, because they will share the same fex number on each 5k. The following table compares the sample running configuration that must be configured for the peer switches shown in the switch vpc topology and the fex straightthrough topology host vpc. In this case nic on server must support lacp so that the two fex s appear as a single switch. Displays the status of frontpanel host ports on a particular fex. It is crucial that the fabrics do not mix, maintaining san ab isolation best practices. If so, then you do not need to vpc the portchannels off the fex, as they are already vpc on the 5k side. Cisco nexus 2000 series nxos fabric extender configuration. Its possible to assign a fex serial number to the fex configuration. Cisco fex, or fabric extender technology makes the central part of ciscos data center strategy. The document describes the various topologies supported when the nexus 2000 fabric extender switches fex used when it is connected to the parent switches or to the end hosts. Virtual port channel vpc content what is vpc advantages of vpc configuring vpc. The next section will show the nexus 7000 fex topologies. Cisco nexus 5000 series switch cli software configuration guide, nxos 4.
Fex topologies for nexus bacon, overlays and virtualization. So from my understanding you have something similar to the following topology. In this case, the fex connected to switchport 11 will be numbered as 101. A fex that is connected to both virtual port channel vpc peers via port channel. Since the fex is configured as the fex 100 on both switches the interface is called e100. Nexus 7k getting started examples part1 basics, vdc and vpc. Topology c is called straightthrough vpc in which each nexus 2000 fex is connected to one parent nexus 5000 while server is dualhomed. There seems to be some confusion on what the supported nexus 70005000 fex topologies are.
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