by Ted Haubein | Jul 1, 2012 | High Availability, Switching
The Cisco Definition Unidirectional Link Detection or UDLD is a Layer 2 protocol that works with the Layer 1 mechanisms to determine the physical status of a link. At Layer 1, auto-negotiation takes care of physical signaling and fault detection. UDLD performs tasks...
by Ted Haubein | May 31, 2012 | Switching
Cisco Tech Days The local Cisco Office in Kansas City hosted another great Tech Days presentation. I was especially excited about this event because they covered the features of the new Cisco 3850 Switch. This is the first line of Cisco Switches with an embedded...
by Ted Haubein | May 25, 2012 | Switching
The term EtherChannel or PortChannel is a a method of aggregation that allows multiple physical Ethernet links to be combined or bundled at Layer 2 into one logical interface or channel. Bundling Ethernet interfaces at Layer 2 is vary similar to that of PPP or MLFR...
by Ted Haubein | Jul 25, 2011 | Switching
Private VLAN or PVLAN often used by Service Providers partitions the Layer 2 broadcast domain of a VLAN into subdomains, allowing you to isolate the ports on the switch from each other. A subdomain consists of a primary VLAN and one or more secondary VLANs. All VLANs...
by Ted Haubein | Jan 27, 2011 | Routing, Switching
The term 802.3 is an IEEE standard or specification for Ethernet, a method of physical communication in a local area network or LAN. The Institute of Electrical and Electronics Engineers or IEEE is the governing body which maintains the standards. In general the 802.3...
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