The Spanning Tree Protocol (STP) is a layer 2 loop prevention mechanism. There are multiple flavors that we need to be aware of: 802.1D (Original Standard) PVST – Per VLAN Spanning Tree PVST/PVST+ Per VLAN Spanning Tree (Cisco proprietary) Rapid Spanning Tree (802.1W) Multiple Spanning Tree/MST (802.1S) The basic premise of STP is: Elect one… read more »
1.1.c i Access ports Access ports are the port type that a client device would typically connect to and are assigned only one VLAN. Access ports carry traffic from the assigned VLAN to and from the client device. 802.1Q tags are not included on packets transmitted or received on access ports. Setting a port into… read more »
1.1.d Etherchannel EtherChannel is a technology that lets you bundle multiple physical links into a single logical link. Etherchannel consists of two parts Port-channel Interface: Logical interface representing the link bundle Member interfaces: Physical links that are part of the link bundle Goal is to hide the member interfaces to the upper layer Protocol so… read more »
1.1.b i CDP Devices send Cisco Discovery Protocol (Cisco proprietary protocol) announcements to the destination MAC address 01:00:0c:cc:cc:cc, out each connected network interface (messages sent in clear text). These multicast frames may be received by Cisco switches and other networking devices that support CDP into their connected network interface. By default, CDP announcements are sent… read more »
CCIE Enterprise Infrastructure Exam Topics 1.1.a i Managing MAC address table1.1.a ii Errdisable recovery1.1.a iii L2 MTU Managing MAC address table Looking at the MAC Addresses on the Switch is simple as typing one command. You get the VLAN it is assigned to, the MAC Address, the way it has been learned (static/dynamic) and on… read more »