VDC
What is VDC? Virtual Device Contexts (VDC) is a feature which is used to create multiple virtual switches from one physical switch. How many vdc we can create? it depends which supervisor engine we are using. Please see as below: SUP1: 4VDC* *** starting from 6.2(2), Sup-1 also support admin VDC. It gives us the option […]
FEX
Understanding Cisco NEXUS 2000 Series Fabric Extender (FEX) 1. N2K acts as a remote line card for Cisco Nexus switches with no local switching. N2K is managed by a Parent switch such as 5K, 6K, 7K or 9K. 2. N2k can’t switch traffic locally. All traffic is sent to the parent switch that provides central […]
Hardware arc
The Cisco Nexus Series switches are modular and fixed-port network switches designed for the data centre. Cisco Systems introduced the Nexus Series of switches on January 28, 2008. The first chassis in the Nexus 7000 family is a 10-slot chassis with two supervisor engine slots and eight I/O module slots at the front, as well […]
L2 Security
A network switch (also called switching hub, bridging hub, officially MAC bridge[1]) is a computer networking device that connects devices together on a computer network by using packet switching to receive, process, and forward data to the destination device. Unlike less advanced network hubs, a network switch forwards data only to the devices that need […]
DHCP
Agenda What is DHCP and how DHCP works? What is DHCP relay Agent and how it works? What is DHCP snooping? Why do we need DHCP snooping? How DHCP snooping works? There are two ways of assigning an IP address on a device: Static Automatic:we use protocol so that the device can obtain its IP […]
FHRP
Agenda What is FHRP? Why do we need to FHRP? Different type of FHRP What is HSRP and how HSRP works? Explanation of HSRP State HSRP Tracking Load Balancing using multiple group VRRP ICMP Redirect GLBP FHRP First Hop Redundancy Protocol is designed to allow transparent fail-over at the first-hop IP router. FHRP enable two or […]
Port-channel
Agenda What is port-channel or EtherChannel? How we create Port-channel and how it work? Why we create Port-channel? Practical where we see mismatch can be major issue? Why Negotiation is always better choice? Port-channel is a technique which is used to combine multiple physical links into a single logical link. Traffic that is switched or […]
RSTP
RSTP Rapid Spanning Tree Protocol (RSTP) is defined in standard IEEE 802.1w. RSTP has a much faster convergence than 802.1d due to the following features: RSTP is not using a timer-based algorithm like traditional STP, and uses regular BPDU’s sent at every hello time interval as a form of keepalive. In STP we have to […]