lldp

In this blog post we looked at the new support for vendor neutral discovery protocol LLDP in vSphere 5. Unfortunately LLDP is only available on the Distributed Virtal Switches and not for ordinary vSwitch. However, for a long time we had CDP (Cisco Discovery Protocol) in the vSwitches, but as the name implies is a Cisco proprietary method. If running Cisco devices this is no problem, but for example HP Procurve has no full support for CDP. This means that they cannot send any CDP data, but is actually... [Lire la suite]

One common issue with networking in virtualized environments is the outgoing ports from the virtual switches to the physical network switches. Configuring with VLANs and similar must be done very carefully to ensure that all ports are correctly setup. It is often quite hard to track patch cables going from the server chassis to the switch port and it is often also difficult to determine the relation between the ESXi server NIC ports to the VMNICs visible inside ESXi. A very helpful tool is a network discovery protocol, for... [Lire la suite]