Compared to the vpc feature of the nexus, the unified control plane aspect of vss mode allows for the full system capabilities to be used on a multichassis etherchannel, so l3 etherchannels, mpls awareness, full qos capabilities, and other features are usable across both of the systems. It provides the signaling path used for synchronizing the two supervisor engines control planes, as well as providing the data path for any user data traffic needing to pass between the two chassis. This includes the popular cisco nexus product family and highlights the main capabilities of the nexus product line and its nxos operating system. Overview chapter 1, this document cisco nxos software commandline interface primer chapter 2 cisco nxos software virtual portchannel. Since the vpc pairs are seen as a single mec from the vss perspective, one must make sure the member links that are participating in the mec are bundled together with the same portchannel id on the cisco catalyst 6500. Cisco virtualized packet coredistributed instance denial of. I will only have 2 links instead of the 4 in the diagram below no cross connects. See also our carole reeces blog about it, configuring backtoback vpcs on cisco nexus switches, and the cisco whitepaper with details. Vss on cisco 45004500x switches router switch blog. For the love of physics walter lewin may 16, 2011 duration. This technology allows for enhancements in all areas of network design, including high availability, scalability, management, and maintenance. Dear all, as we know nexus is expensive, if we are just talking on vpc function in nexus, what is functional difference between vss and vpc. Etherchannel,multichassis etherchannel,vss,vpc and ecmpequal cost.
This article provides configuration that will allow you to easily enable vss on these switches. View the cisco virtualized packet core vpc product from cisco systems. I have one core block with nexus vpc layer2 and three distribution blocks with 4500x vss layer3. You can find an overview of the feature and how to configure it on the nexus 5000 series switch in the virtual portchannel quick configuration guide. Cisco public 2 vss and vpc no blocked ports, more usable bandwidth, loadsharing. Cisco nxos software vpcs and cisco catalystvirtual switching systems vss are of similar technologies. However, the key difference between vpc and vss is that vss creates a. Simplifying networks using vpc and vss cisco public. Vpc fundamentals and connectivity options net201 duration.
Vss supports fast ethernet connection but vpc on nexus 9k does not support fast ethernet which was our challenge to move isps 100 mbps connection without adding another device. If we use vss, it could be installed in several cisco devices, which are very cheaper. Data center design with cisco nexus switches and virtual portchannel. Peer configuration check bypass for cisco nexus 5000 series running. So i stripped all the port channel config and setup a vpc per link between the n9k and the two vpcs on the n9k for the core connections and finally a single port channel on the 6509 with all 4 troubles. Mar 14, 2020 vpc is also differ from vss in cisco 6500 catalyst switch, where vss has the switches with only one control plane and two data plane while in vpc environment nexus switches have two data plane and two control plane.
O vpc e semelhante ao vss virtual switch system no catalyst 6500s. Vss was first available in cisco 6500 but it has recently been introduced to cisco 4500 and 4500x. Cisco catalyst 6500 vss and cisco nexus 7000 vpc it tips. Quick tutorial on how to set up a cisco catalyst 4500 x pair with vss. This section covers cisco data center technologies found in small and large enterprise organizations around the globe. Helping businesses of all sizes identify and implement technology solutions with ease and precision.
Ciscos virtual switching system vss is a pretty common technology that joins two physical cisco catalyst switches into one logical switch thereby joining the two data planes. Hi is it possible to run vss core layer like 6500 and have another set of switches like n5k7k as distrubution running vpc. Configure the vsl port channel and member ports the virtual switch link vsl, like the vpc peerlink in vpc, is clearly a vital part of the vss. Virtual switching system vss is a new and exciting technology on ciscos catalyst 6500 switches, allowing for the virtualization of 2 physically separate catalyst 6500s into a single logical entity for configuration, management, network design and packet forwarding.
What is functional difference between vss and vpc in nexus. Cisco 4500 4500x 6500 vss configuration lab minutes. Both technologies are similar from the perspective of the downstream switch but there are differences, mainly in that the control plane works on the upstream devices. Its products range in areas of iot, sdn, nfv, cloud, sdwan, ai, data centers, storage, security, and more. Dec 14, 2015 the vss and vpc systems have an explicit configuration between the cisco distribution switch pair. Before configuring vss on cisco 4500 please verify hardware and software requirement. Etherchannel,multichassis etherchannel,vss,vpc and ecmpequal. Oct 12, 2016 cisco stackwise technology unites up to nine individual switches into a single logical unit, using special stackinterconnect cables and stacking software. For cisco etherchannel technology, the term multichassis etherchannel mcec refers to either technology interchangeably. Introduction to cisco vss madnetworks technical blog. The vulnerability is due to insufficient handling of usersupplied data by. For vpc, you would likely connect the two switches together by 10 g links, preferably one on each of two different line cards for robustness, and declaring that link to be a portchannel and a vpc.
Etherchannel,multichassis etherchannel,vss,vpc and. As depicted, members of a vpc are distributed between each cisco nexus 7000. Cisco virtual switching system is a clustering technology that pools two cisco catalyst 4500x series switches into a. Cisco nexus 5000 series vpc design and configuration paul.
I liked the vss model but vpc can be a lot easier to fix when it goes wrong since blowing it up and starting over isnt as big of a deal. I just need to extend the vlans onto n5k7k and these switches will be having few servers directly connected to them serverhost vpc there will be 1 link to each distr. Vpc is allowed and works, but we need to design it to operate at l2 only. Software versions to form the vsl as well as determine which switch becomes. Well, recently i had the opportunity to install vss in a customers data center as part of a complete network migration from an old nortel switch network to a new cisco network using primarily catalyst 6509 switches with sup 720 10 g supervisors. Cisco virtualized packet core vpc sdn and nfv product. Feb 16, 2015 issu demonstration in servicesoftwareupgrade allied telesis. Configuring cisco virtual switch system vss on cisco. Cisco public 2 vss and vpc no blocked ports, more usable bandwidth, loadsharing distribution or link failure. The virtual switching system is created by converting two standalone catalyst 6500 systems to a virtual. At this time being, vpc is implemented on cisco nexus 9000, 7000, 5000 and 3000 series platforms with or without cisco nexus 2000 series fabric extenders. Issu demonstration inservicesoftwareupgrade youtube.
I then looked at using 100g qsfps for the n9k interconnect and realized instead of a third port channel, the better way to go would be a vpc. Design guide figure 4 illustrates another vpc topology consisting of cisco nexus 5000 series switches and cisco nexus 2000 series fabric extenders in straightthrough modethat is, each fabric extender is singleattached to a cisco nexus. Hi nuredin, i think, if the connections between the vss and nexus are layer3, you would have a faster convergence with no stp issue. While vss makes use of multi ether channel mec to bond cisco catalyst series switches together, vpc is used on cisco nexus series switches for the same purpose.
In fact, the client switch thinks that it has an etherchannel group with a single switch. With vss, as the control plane is merged between the two devices, there is no loop, so stp is not actively needed not actively here, hp tends to disable stp but not cisco. Both switches have the vssup2t10g supervisor that we will use for vss. Cisco catalyst 3850 series and cisco catalyst 3650 series. Another cool feature is efsu enhanced fast software upgrade which allows you to upgrade the ios version without any downtime. In a vss, the data plane of both clustered switches is active at the same time in both chassis.
Aug 12, 2017 a virtual switching system vss combines a pair of catalyst 4500x series switches into a single network component, enabling them to function as one logical switch. From the client switch, theres really no difference in functionality. Recently i had the opportunity to prepare two 4500x switches and two nexus 9372 and configure vss and vpc on them respectively. The cisco virtual switching system is a clustering technology that pools two cisco catalyst 4500e series switches with cisco catalyst supervisor engine 7e or 7le or two catalyst 4500x series switches into a single virtual switch. In order to do so, you need a portchannle from each nexus to both vss switches the same way you have it in your diagram but the key is that these portchannels can not be in a vpc, they need to be regular portchannles with 30 ip on the portchannles interface. Hi is it possible to run vsscore layer like 6500 and have another set of switches like n5k7k as distrubution running vpc. That allows them to act as a single logical switch when connected to the etherchannel. The virtual switching system is created by converting two standalone catalyst 6500 systems to a virtual switching. In this tutorial i will be using two cisco catalyst 6504 switches with 72010g vss supervisors to show you how to configure vss and verify that its working. Feb 15, 2016 as depicted, members of a vpc are distributed between each cisco nexus 7000.
Virtual port channel vpc nexus vs virtual switching system vss catalyst. From an operational standpoint, vss presents a single management point, 24 sups with one active. Data center design with cisco nexus switches and virtual. A vulnerability in the ingress udp packet processing functionality of cisco virtualized packet core. I check and i saw that vss is kind of similar to vpc in catalyst. Feb 12, 2018 this feature is not available right now. Dual cisco catalyst 6509 switches nonvss mode aggregation layer. The individual switches can be any combination of cisco catalyst 3750 and cisco catalyst 3750e series switches. If your nexus 5000 isnt new in box nib, then the first thing you will want to do after powering up is to verify that the software licenses match what.
Vss supports layer 2 and layer 3 mcec where vpc only supports layer 2 mcec which could be a challenge with some connections fast ethernet support. The cisco catalyst 6500 series virtual switching system vss allows the clustering of two chassis together into a single, logical entity. May 10, 2018 vpc also allows the creation of layer 2 portchannels that span two switches. Vss stack to nexus vpc can anyone help with linking a 4500x vss stack to a pair of nexus 5k connected vpc.
The etherchannel is configured as a trunk with vlans 10, 11, 12, and 100, with the native vlan set to 999. Apply bug fixes and deploy new features and services through inservice upgrade of the complete cisco ios software image. Therefore, the failover scenario of the vpc between vss is the same as that between vpc and a single physical host. The cisco nexus products dont support vss, but are able to provide similar capability i. Virtual switching system vss is a method to combine two physical switches into one logical switch to achieve physical redundancy, spanningtree blocking elimination, and increased bandwidth. Cisco nxos software vpcs and cisco catalyst virtual switching systems vss are similar technologies. Details on concepts and configuration requirements are outside the scope of this document. Issu demonstration in servicesoftwareupgrade allied telesis. Di software could allow an unauthenticated, remote attacker to cause both control function cf instances on an affected system to reload, resulting in a denial of service dos condition. At l2, the switches behave like one switch, while retaining their distinct identities, unlike the cisco vss technique used with the 6500 switches. Cisco stackwise technology unites up to nine individual switches into a single logical unit, using special stackinterconnect cables and stacking software. Software versions to form the vsl as well as determine which switch becomes active and hot standby from a control plane perspective lmp lmp. Cisco virtual switching system is a clustering technology that pools two cisco catalyst 4500x series switches into a single virtual switch. Cisco vpc and vss you can equate the two 6500 running vss to be one logical device.
Virtual switching system vss configuration for cisco 4500. Short and sweet cisco vss this post is a short, sweet and to the point copypaste resource for configuring ciscos virtual switching system. Apr 20, 2016 quick tutorial on how to set up a cisco catalyst 4500 x pair with vss. The vss and vpc systems have an explicit configuration between the cisco distribution switch pair. The vss cisco virtual switching system is a clustering technology that pools two cisco catalyst 4500e series switches with cisco catalyst supervisor engine 7e or 7le or two catalyst 4500x series switches into a single virtual switch.
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