A virtual switch can detect which virtual machines are logically connected to each of its virtual ports and use that information to forward traffic to the correct virtual machines. They are used to establish a connection between the virtual and the physical network. Virtual switches work very much like their physical counterparts, Ethernet switches, but lack some of their advanced functionality. How to configure CDP in Standard Switch (vSS):įor vSS we need to this by ESXi shell command.įirst check what type of mode is set (listen is by default), then enable mode (add your mode option).VMware has designed the vSphere suite to mimic the functions of a physical network, so a lot of the network hardware you’ll find in the real world, you will also find virtualized in vSphere. So check with your Network Teams what is the best option for them (or for Virtual Administrators). In our implementations, most are set with Both, but some we use Listen. Note:Depending on your Network / Virtual environment you can choose any of these options. Listen mode – The ESXi/ESX host detects and displays information about the associated Cisco switch port, but information about the vSwitch is not available to the Cisco, Switch administrator.Īdvertise mode – The ESXi/ESX host makes information about the vSwitch available to the Cisco switch administrator but does not detect and display information about the Cisco switch.īoth mode – The ESXi/ESX host detects and displays information about the associated Cisco switch and makes information about the vSwitch available to the Cisco, switch administrator.
ĭifferent ways to grab Physical Switches vs Virtual Switches information : Since there was only one vSwitch created in the ESXi, so I remember there was a way to configure this LLDP (we were using Juniper Switches) in the vSwitch using the vsish command. Since this was a new installation(new Switches, ESXi hosts, etc.), there was no vCenter and also no Storage Network (we still need to check where and which cables are connected). By using CDP (for CISCO) or Link Layer Discovery Protocol (LLDP for HP, Juniper, or others brands) Network teams can quickly get this information, even we can check this in the vCenter (see images below). When you have your vCenter and all VMware Infrastructure installed, this is easy to enable and discover.
Since we did not have access physically to the Switches/ESXi hosts and we need to double-check if the cabling was correct, and also which interface was connected to which switch port. This week we install new ESXi hosts from a remote location. In this article, we go through CDP and also through LLDP, how to Enable Link Layer Discovery Protocol (LLDP) in vSwitch, but also for vDS and how to check the information in vCenter provided by this feature.
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