The experience of forgetting information that you trust a digital device to store and remember for you
EIGRP can be configured in Named mode which simplifies the configuration of EIGRP under one area of config, instead of spread between the router section and all the interfaces.
Policy based routing (PBR) is a mechanism by which we can route traffic in a manner other than that based on its destination. PBR allows forwarding decision to be based on source, destination, protocol type (FTP, HTTP, etc. ) or incoming interface. How does it work? Traffic criteria defined by a route-map match Permit means… read more »
A static route is a manually configured route and will have a default administrative distance of 1.
Packet routing involves three main steps
router learns a particular route from multiple sources it can not use the metrics since they all use different units. This is where the administrative distance (AD) comes in. The protocol with the lower AD is chosen and that route installed in the RIB.
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 »
The “CCIE Enterprise Infrastructure – Host VM” includes a set of tools which can be useful to verify the correct implementation of certain features on the switch (e.g. Port-security, etc.) The macof is a member of the Dsniff suit toolset. It is used to flood the switch on a local network with MAC addresses. Macof… 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 »