Estoy tratando de configurar 2 switches catalyst en stackwise pero al momento de reiniciar ambos switches para que carguen la configuracion para que uno sea activo y otro pasivo, me manda error el que va ser pasivo y me marca como recovery-mode.
Estaba viendo que requiere una licencia de network advantagepero queria corroborar si esa licencia tiene algun costo. Te sugiero contactar con un partner de Cisco de tu localidad para averiguar los precios que manejan ellos. Adjunto los requerimientos de stackwise, en algunos modelos se requiere que la version del IOS sea de los mas recientes, como menciona Luis, si haces el upgrade de licencia DNA debes contactar aun Cisco partner quien te puede ayudar con el proceso, y brindarte el precio.
StackWise Virtual is an advanced stacking technology that supports both core and distribution deployments through multiple topologies.
It provides higher scale for system virtualization at the network layer. All the switches in a Cisco StackWise Virtual solution must be of the same switch model.
All the switches in a Cisco StackWise Virtual solution must be running the same license level. All the switches in a Cisco StackWise Virtual solution must be running the same software version.
Contact the Cisco Technical Support Centre for the specific list of features that are supported under each one of these technologies. All inter-chassis system control communication between stack members is carried over the reserved VLAN ID from the global range.
The dual active and StackWise Virtual link configuration must be performed manually and the device should be rebooted for the configuration changes to take effect.
If this command is configured on a single SVI or router port that requires Layer 3 injected packets, all other SVIs or routed ports on the device also must be configured with the same first four most significant bits 4MSB of the MAC address.
If Layer 3 injected packets are not used, this restriction does not apply. If the running configuration of the switch in recovery mode has been changed without saving, the switch will not automatically reload. In this situation, you must write the configuration to memory and then reload manually using the reload command. Only configuration changes applied to VSL ports on the switch can be saved.
Network Engineering Stack Exchange is a question and answer site for network engineers. It only takes a minute to sign up. They are just out of box switches, turned on a few hours earlier.Unboxing - Cisco Catalyst c9500-16x-a
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Active 6 months ago. Viewed 2k times. Did any answer help you? If so, you should accept the answer so that the question doesn't keep popping up forever, looking for an answer. Alternatively, you can provide and accept your own answer. Active Oldest Votes. You need to change license license boot level network-advantage addon dna-advantage. Asim Asim 1. Sign up or log in Sign up using Google. Sign up using Facebook.
Sign up using Email and Password. Post as a guest Name. Email Required, but never shown. The Overflow Blog. Featured on Meta. Community and Moderator guidelines for escalating issues via new response…. Feedback on Q2 Community Roadmap.Not only did I get to come up with the name, they BU even paid me for my creativity. We will proceed with StackWise Virtual.
In this example, I came up with the name back in June of and only got to implement SV on the new Catalyst high-performance this month. Before I go into the actual configuration of SV, allow me to elaborate on the solution and architecture.
Sure you can still use the traditional approach of leveraging STP and FHRPs, but this is still complex and rigid in terms of design and operations. Now, I only have two logical devices to manage when in fact it could be as many as 10 total switches 8x IDF, 2x MDF consolidated down to two operational touch-points. Solution for the split brain scenario? The next question that I usually get is around hitless ISSU upgrades to StackWise virtual domain because customers are used to physical StackWise where a reboot of the entire stack is required.
Cable up the StackWise virtual links and dual-active-detection link, wr mem, reload and watch the join magic via the console. This blog post has gone a little longer than I wanted, but I hope you find the information useful. In the spirit of learning from our mistakes and sharing knowledge.
Instead, simply follow the config guide to dissolve the StackWise virtual stack the correct way and learn from my personal mistake.Hi chaps. Fisrt of all, I would like to apologize for lack of activity on this blog.Discharge monitoring report form
The company where I work was hit by NotPetya ransomware last summer. As a result, we worked absolutely crazy hours for many months to recover all our services and secure our network.
I simply had no spare time to contribute to this blog. Anyway, things are much more stable and steady now, so I will try to get back to my hobbies. Today I would like to give you a brief overview of StackWise Virtual technology, which Cisco has introduced in Denali Originally, only Catalyst 48XS switching platform supported this feature.
At the moment of writing of these notes, Cisco announced support of the feature across all Catalyst series. Cisco simplified VSS and named it differently. SWV combines two and only two physical switches into one single logical entity. Hence the new name — StackWise Virtual.
One switch becomes Active Supervisor, which is responsible for all Management and Control functions L2 and L3 protocols.Turfco dealers
Both switches perform forwarding functions though. For example, Catalyst CQ switch has 24 40Gbps ports. It is very likely that 2 or maximum 4 ports will be allocated for SWV link. This results into maximum virtual ring bandwidth of Gbps. It is not unusual for traffic to arrive on one switch and to be forwarded via the port on another switch — Gbps backplane capacity is what makes it latency-free.
That is, hashing functions are still consulted, but scope is limited to local interfaces. If MEC consists of two physical interfaces one per switchthen each switch will send data over its local interface. Alternatively, if MEC consists of four physical interfaces two per switch, like on the picture abovethen hash functions will load balance traffic across two local interfaces.
Switches will boot as a single logical entity, like with StackWise It is possible to configure dedicated Dual Active Detection link, but I personally see no point. In case of 40Gbps switches, why would you waste two 40Gbps ports one per switch for heartbeat function? Assuming there will be at least one MEC which is very likely to be trueno dedicated interfaces are needed for Dual Active Detection to work.
Downstream switch replicates this information to remote SWV member. This is done by both members of SWV Domain. In simple words, downstream switch performs a function of repeater for fast hello packets. The moment you do this the following events are generated on the switch with Active Supervisor some output is omitted for simplicity :. Standby switch takes over Active Supervisor role, so both switches are now Active, but because Dual Active condition was also detected, original master shuts down all its interfaces.
The following output confirms that DA condition was triggered by Active supervisor. To recover from Dual Active condition assuming SWV Link is operational againyou have to reboot switch that is in a recovery mode ex-Active Supervisor.
Ignore warnings that it is an Active switch and it will reboot the whole stack. This will not happen. Reload command will only reboot one switch in a split stack scenario. Once switch comes up and configuration is synchronized stack is formed again. Reloaded switch will become Standby Supervisor until whole stack is rebooted and election process selects new Active Supervisor using configured priorities.Similarly to the old Virtual Switching System VSSthe stackwise virtual allows the clustering of two chassis together into a singlelogical entity, to allow high availabilityscalabilitymanagement and maintenance.
This capability enables a loop-free Layer 2 network topology, since the StackWise Virtual switches are treated as one logical switch for both access and core switches. The StackWise Virtual switch also simplifies the Layer 3 network topology by presenting itself as one logical switchthus reducing the number of routing peers in the network.
StackWise Virtual link red links : it carries data traffic and in-band control traffic between two switches. The data is sent over a StackWise Virtual link under the following circumstances :. Remember: The active and standby switches support hardware forwarding that will individually perform the desired lookups and forward the traffic on local links to uplink neighbors.
StackWise Virtual on Catalyst 9500
Dual-Active-Detection link blue link : If the standby switch detects a complete loss of the StackWise Virtual link, it assumes the active switch has failed and will take over as the active switch.
However, if the original StackWise Virtual active switch is still operational, both the switches will now be Cisco StackWise Virtual active switches. This situation is called a dual-active scenario. To avoid this destructive scenario you need to implement the dual-active-detection link ; there are two methods to detect dual active scenario: fast-hello or enhanced PAgP.
Note : in case of dual-active condition stackwise virtual link down the active switch shuts down all of its non-SVL interfaces to remove itself from the network and the standby switch takes over Active Supervisor role.
To recover from Dual Active condition assuming stackwise virtual link is operational againyou have to reboot switch that is in a recovery mode ex-Active Supervisor. Note: All the commands should be executed on each switch A and B ; then save the configuration and reload the switches.
Note : During a dual active condition the active switch generates these messages:. Remember : By default, switch priority is 1. To do it check this command:. WhoisUP 0.N920c rom
Jun 12 An article by Fabio Semperboni Tutorial. The stackwise virtual allows the clustering of two chassis together into a single, logical entity, to allow high availability, scalability, management and maintenance. Fabio Semperboni. Tags: Basic configurationCatalystStackVirtual. Join us on LinkedIn! Join us on Facebbook! Follow Us on Twitter! Subscribe to our RSS Feed! Join us on Youtube!
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I am wondering if its the fact its Easter delaying it of if they had a problem with the release. Its now 2nd April and not there. I have been waiting on its release all month. I've had a pair of CX switches in a stackwise-virtual configuration for a few weeks now. We're running We are also running Stackwise virtual support for X requires at least Any idea why it isn't supported on the 40G links yet?
Could it be that both 40G interfaces are terminated on the same ASIC, and therefore not really redundant? Upgrade to Stackwise-virtual is working on that code release without any issues for us so far. Buy or Renew. Find A Community. We're here for you! Turn on suggestions. Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type. Showing results for. Search instead for. Did you mean:. Catalyst X - Stackwise Virtual soon?
Labels: Other Switching. Accepted Solutions. Re: Catalyst X - Stackwise Virtual soon? Starting with release Mark Malone.
VIP Mentor. Does it working properly? Everyone's tags 1. Tags: Just tried to configure it but failed. Activating VSL on a 40G interface triggers an error message saying that this interface is not supported. Julio E.Your software release may not support all the features documented in this module. For the latest caveats and feature information, see Bug Search Tool and the release notes for your platform and software release.
To find information about the features documented in this module, and to see a list of the releases in which each feature is supported, see the feature information table at the end of this module. Use Cisco Feature Navigator to find information about platform support and Cisco software image support. An account on Cisco. All the switches in a Cisco StackWise Virtual solution must be of the same switch model.
All the switches in a Cisco StackWise Virtual solution must be running the same license level. All the switches in a Cisco StackWise Virtual solution must be running the same software version. Contact the Cisco Technical Support Centre for the specific list of features that are supported under each one of these technologies. All inter-chassis system control communication between stack members is carried over the reserved VLAN ID from the global range.
The dual active and StackWise Virtual link configuration must be performed manually and the device should be rebooted for the configuration changes to take effect.
If this command is configured on a single SVI or router port that requires Layer 3 injected packets, all other SVIs or routed ports on the device also must be configured with the same first four most significant bits 4MSB of the MAC address.Spanish/english forms
If Layer 3 injected packets are not used, this restriction does not apply. This applies to all Layer 3 ports, SVIs, and routed ports.
High Availability Configuration Guide, Cisco IOS XE Fuji 16.9.x (Catalyst 9500 Switches)
Cisco StackWise Virtual is a network system virtualization technology that pairs two switches into one virtual switch. Switches in a Cisco StackWise Virtual solution increase operational efficiency by using single control and management plane, scale system bandwidth with distributed forwarding plane, and assist in building resilient networks using the recommended network design.
Cisco StackWise Virtual allows two physical switches to operate as a single logical virtual switch using a 40G or 10G Ethernet connection. A typical network design consists of core, distribution, and access layers. The default mode of a switch is standalone. When two redundant switches are deployed in the distribution layer, the following network challenges arise:.
If VLAN IDs are reused between access layers then, it will introduce a spanning tree loop that will impact the overall performance of the network.
Spanning tree protocols and configuration are required to protect Layer 2 network against spanning tree protocol loop, and root and bridge protocol data unit management.
Additional protocols such as first hop redundancy protocol are required to virtualize the IP gateway function. The standalone distribution layer system provides protocol-driven remote failure and detection, which results in slower convergence time.
We recommend Cisco StackWise Virtual model for aggregation layers and collapsed aggregation and core layers. The stack can be formed over a redundant 40G or 10G fiber links to ensure that the distribution or the aggregation switches can be deployed over a large distance. Note that STP keeps one of the ports connected to the distribution switches blocked on the access switches. As a result of this, an active link failure causes STP convergence and the network suffers from traffic loss, flooding, and a possible transient loop in the network.
On the other hand, if the switches are logically merged into one switch, all the access switches might form an EtherChannel bundle with distribution switches, and a link failure within an EtherChannel would not have any impact as long as at least one member within the EtherChannel is active. When access layer and aggregation layer are collapsed into a single StackWise Virtual system, MEC across the different access layer domain members and across distribution and access layer switches will not be supported.
MEC is designed to forward the traffic over the local link irrespective of the hash result.
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