Cisco vss

The conversion is a one-time process that requires a few simple configuration steps and a system reload. Once the individual chassis reload, they are converted into the Virtual Switching System. All control plane functions are centrally managed by the active supervisor engine of the active virtual switch chassis, including :. The VSLs can be configured with up to eight links between the two switches across any combination of line cards or supervisor ports to provide a high level of redundancy.

If for some rare reason all VSL connections are lost between the virtual switch members leaving each virtual switch assumes the role as the active virtual switchand each virtual switch controls only its local ports.

Duplication of this configuration can possibly have adverse effects to the network topology and traffic. To avoid this disruptive scenario, Cisco has implemented different mechanisms to address this dual-active scenario:. If either switch regardless of priority is initiated prior to the subsequent switch, it always assumes the role of the active virtual switch. To find more informations about etherchannel read this article. WhoisUP 0. Nov 26 An article by Fabio Semperboni Tutorial.

The VSS allows the clustering of two chassis together into a single, logical entity. This technology allows for enhancements in all areas of network design, including high availability, scalability, management, and maintenance. Fabio Semperboni. Join us on LinkedIn! Join us on Facebbook! Follow Us on Twitter! Subscribe to our RSS Feed! Join us on Youtube! Intelligent Routing Platform. Email Updates Enter your email address to receive notifications of new posts. Ciscozine on Facebook.

We use cookies to ensure that we give you the best experience on our website. If you continue to use this site we will assume that you are happy with it. OK Read more.Go to Solution. Let assume cpe-1 and cpe-2 are Cisco routers. In this case, you can simply create a sub-interface an each device connecting to the VSS with dot1.

Now you create vlan 10 with dot1q encapsulation on the and add it to what ever interfaces that are connecting to the cpes with an ip address on th svi.

View solution in original post. I tried to search for some documents on Easy VSS, have not found yet. Any links to Easy VSS would be a great help. All of us don't know what bugs lurk beneath, unless you want to be the "guinea pig".

Cisco's quality control, when it comes to the stability of their IOS codes, have taken a significant "hit" for the last two years. Bugs that should've been picked up early on, prior to public release, weren't. For example: you connect cpe-1 to and cpe-2 to I personally like to use dot1q, so in the future if I need to add another vlan, I don't have to have an outage to change the port from access port to trunk.

E release software and it supports VSS. Another problem here is SSH is not supported. Any idea what can be done as this is the latest software release. Buy or Renew. Find A Community. We're here for you!

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cisco vss

Reza Sharifi. VIP Expert. Hi,The links coming from cpe1. Hi, The links coming from cpe1 and cpe2 can be bundled and made layer3 port channel on VSS swirtch? No, the link can't be in a Porchannel as cpe-1 cpe-2 are 2 different devices.

If cpe-1 and 2 were for example Cisco stacked, then yes, you could put both links in a Portchannel on the s and also on VSS. Can you eloborate how I can use dot1q encapsulation for this scenario? Leo Laohoo.View All Topics. Buy or Renew. Find A Community. We're here for you! Cisco Community : Technology and Support. 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.

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cisco vss

Wireless and Mobility. Is there a run a set of commands from a Small Business Switches. Server Networking. Endpoint Security. Why my wifi internet status changes to Wireless Security and Network Management.

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VSS on Cisco 4500/4500X Switches

Cristian Matei.In a VSSthe data plane of both clustered switches is active at the same time in both chassis. VSLs can carry regular user traffic in addition to the control plane communication between the VSS members. VSS actually does a better job of emulating a single switch with one active, and one or more standby control plane allowing it to fully support a dual-homed L3 routed link.

Before finishing VSS configuration for Cisco series switchesyou need to know the basic requirement. Only Enhanced PAgP used to be supported but, as of 3. Here we choose to use Fast Hello, although more than one method can be configured.

Physical vs. Quad-sup VSS configuration with in-chassis redundant sups: In-chassis redundant sups in rommon mode with active uplinks. If a VSS does not meet the requirements for SSO redundancy; it will be incapable of establishing a relationship with the peer switch. Configure VSL links. Convert switch to VSS mode. Confirm and switch will reload!

On Switch 2 1. Adjust switch priority! Share This Post.In a VSS, the data plane of both clustered switches is active at the same time in both chassis. VSLs can carry regular user traffic in addition to the control plane communication between the VSS members. For more information about hardware to support please refer VSS Hardware requirement.

If a VSS does not meet the requirements for SSO redundancy; it will be incapable of establishing a relationship with the peer switch.

cisco vss

Before configuring VSS on Cisco please verify hardware and software requirement. First you have to configure the same virtual switch domain number on both switches of the VSS. The virtual switch domain is a number between 1 and After domain number you must configure one switch to be switch number 1 and the other switch to be switch number 2. Then you need to configure VSL with a unique port channel on each switch.

To avoid this situation, check that both port channel numbers are available on both of the switches.

You need to add the VSL physical ports to the port channel. Interface status will show UP, but the line protocol will be down. After you enter this command it will prompted to confirm the action. Enter yes. The system creates a converted configuration file, and saves the file to the bootflash:. After you confirm the above commands on both switches, the running configuration is automatically saved as the startup configuration and the switch reboots.

When switches are being converted to VSS, you should not set them to ignore startup-config. If done, the switch can be enabled to parse the startup-config at the rommon prompt. Ignoring startup-config in VSS mode causes a switch to boot in a semi-VSS mode, which can only be corrected by a reboot and by enabling the parsing of startup-config. Catalyst Confidence: VSS on the Up to two physical Cisco switches allow operating as a VSS.

But wen the active or standy sup failes the second sup in the chasis boots in standalone mode but not in the vss mode. Configuring VSS. Hope it help. Hope it will clear you about VSS. Dear Ashish. There is a bug in one variant of implementation, which causes the crashes of the switch 2. If you want, we can talk more about it.

cisco vss

I tried two variants, one always crashes. The other one, which is similar to the one described here, really works. I then changed. Removed priority of switch 1, and moved the port-channels to gig ports, then, as magical, it worked.

Cisco 6500 VSS Configuration Example

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.Before I begin, let me point you to the Cisco docs that will serve you well. Catalyst Release It is not my intention to rewrite the Configuration Guide. My goal here is to provide you with the commands necessary to get VSS up and running.

However, there are some hardware and software requirements which I will repeat. This is important. The supervisors must completely match, down to the PFCs. As stated above, both will work. However, if the Sups and line cards are not all the same, there can be issues. This can be confirmed with the show redundancy command. I have not personally seen this so this is more book knowledge than personal experience. The priority tells which will begin as the!

Higher number gets priority switch virtual domain 9 switch 1 switch 1 priority switch 2 priority exit. We will be using 1 and 2. The etherchannel mode must be set to on. Best practice for etherchannel is normally! But this is not a normal etherchannel. This is a special type of etherchannel and!

Answer yes and then be patient. It takes a while for the switch to reboot. Higher number gets priority switch virtual domain 9 switch 2 switch 1 priority switch 2 priority exit. A console connection to switch 1 will show the active switch. A connection to switch 2 will show it to be the standby switch.

The two switch configs have been merged into 1. In truth, the config on switch 1 is maintained while anything other than VSS from switch 2 is lost. For example, had you given both switches a hostname, the hostname of the merged switch would be that of switch 1. To reference the modules on switch 1 or switch 2, the command is now show modules switch 1 or show modules switch 2.So Spanning tree is not required. HSRP works like active and standby, if the active devices go down, the standby device will become in active.

It is part of the FHR Protocols. HSRP work with active and standby devices, also you could include more devices to be part of the HSRP group, but they will be in listen state. By default the priority is In order to enable the failover the preempt command is used.

Remember, the HSRP groups must be have communication between them, it could be through trunk interfaces or routing protocols.

To add to Julio's info, VSS is also supported on the replacement series, the series, it's also supported on some of the later series and I suspect it will be supported on some of the just announced Catalyst series. When Julio mentions "2 networks", I suspect he has in mind physical gateway devices. As Julio goes on to explain, HSRP provides a virtual gateway IP; one that multiple devices support, but only one device actively supports it i. Also there are several of varieties of HSRP, i.

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:. What are the pros and cons of both. Labels: Routing Protocols. I have this problem too. Julio E. VIP Advisor. Please rate the comment if it is useful Hi Julio, Thnx for ur reply. You are welcome.

Etherchannel,Multichassis Etherchannel,VSS,VPC and ECMP-Equal Cost Multipath

By default the priority is In order to enable the failover the preempt command is used. You can use the following command to verify the status on a switch HSRP also works on routers show standby vlan 10 Hope it is useful Joseph W. VIP Expert. To add to Julio's info, VSS. Re: Hi. Latest Contents. Created by SammyAko on AM. Hello, the router is unable to assign IP address to the Created by AqeelHasan on PM.

Powershell scripts for Cisco switch inventory.


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