Cisco CCNP SWITCH (300-115): The Complete Course

Explore the Cisco CDM model, detailing core, distribution, and access layers. Learn how this architecture enables scalable, redundant networks with high-throughput switching, QoS, policy-based routing, and backbone aggregation.

Understand switching as forwarding frames by destination MAC, learning source MACs into a CAM table, using ARP for MAC discovery, and flooding when needed, with layer 2 to multi-layer switching.

Learn layer 2 switching: build the CAM table by learning source MACs, forward frames by destination MAC, flood broadcasts on unknown destinations, and use ARP for MAC resolution.

Explore the similarities and differences between layer 3 routing and switching, highlighting forwarding by destination IP, gateways, and the role of ASIC hardware in high-speed layer 3 switching.

Explore layer 4 switching, where a switch forwards traffic by inspecting DCP and UDP port numbers at the transport layer and applying access lists.

The switch learns end devices' mac addresses from the source mac in frames and builds its mac table via arp requests or broadcasts depending on ip presence.

Investigate layer 2 switch tables and how content addressable memory stores MAC addresses and exit interfaces, highlighting their roles in security and quality of service in switches.

Explore how multilayer switching forwards frames by destination MAC and packets by destination IP, while validating UDP port numbers and integrating layer 2 and layer 3 processing.

Explore first-generation multilayer switching, covering how the route processor creates entries to identify destination IPs and how the switch engine forwards packets based on those entries.

Explore second generation multi-layer switching, where a distributed forwarding information base across six ASICs enables fast packet forwarding without route processor lookups.

Learn how switch tables learn MAC addresses via content-addressable memory and how the feature manager compiles ACLs while the switching database manager stores them in SDM for security and QoS.

Explore the forwarding information base and its components, showing how it maintains the routing table within networks with multi-layered information, including L2 information and related data.

The packet rewriter in multi-layer switching forwards data by rewriting the packet header, updating the source and destination MAC addresses, TTL, and next-hop information, and recalculating checksums under ACLs.

Learn to configure switch ports as access or trunk ports across multiple switches, using interface commands, enable trunk encapsulation dot1q, and verify with show commands.

Learn to use the interface range command on Cisco switches to configure multiple ports at once, verify with show interface range, and apply default or trunk settings.

Learn to use macro commands on Cisco switches by defining interface ranges and a macro name, then applying the macro to multiple interfaces to configure them consistently.

Learn to configure descriptions on switch interfaces across multiple switches, assign device mappings for PCs, servers, gateway, and uplinks, and verify with interface range commands.

Configure Cisco switch port speed by setting 100 Mbps or 1 Gbps on individual interfaces or via an interface range (fa0/1 - fa0/3), then verify using show commands.

Learn to configure switch port duplex on Cisco switches by selecting interface, choosing full or half duplex, and applying forceful settings while understanding default duplex behavior.

Configure error-disable on Cisco switches by selecting disable causes and setting recovery conditions and the minimum time (default five minutes, as low as 30 seconds).

Explore how Cisco discovery protocol (cdp) operates by default on Cisco switches and routers, view neighbor relationships with show cdp neighbor, and enable or disable cdp globally or per interface.

Enable and verify the link layer discovery protocol (lldp) on Cisco switches, an open standard similar to cdp, and learn how to view neighbors and status with show commands.

Explore switching and its functions, including address learning, forwarding by destination MAC, flooding, and loop avoidance via spanning tree protocol.

Understand store-and-forward, cut-through, and fragment-free switching, including error detection and destination MAC forwarding, and how switches learn MAC addresses to forward frames efficiently.

Explore unicast, broadcast, and multicast MAC address types and how switches flood broadcast and multicast frames to all ports except the source.

Define a broadcast domain as the set of LAN-connected devices that receive a broadcast frame. Switches flood the frame to all interfaces within the domain.

Explore collision domains, a set of LAN-connected devices where one frame transmission is heard by all others on the segment, such as PCs connected to a hub.

Explore csma/cd, a media access control method in local area networks and early internet technology, which senses a busy channel, backs off, and transmits or stops on collision detection.

Understand how a local area network forms a single broadcast domain and how a switch can create separate broadcast domains using vlans.

Configure switch ports to predefined VLANs; static VLANs use port-based membership so devices connected to specific ports join the assigned VLAN.

Dynamic vlan assignment explained: switches learn host mac addresses, query the vlan management policy server for membership, and assign devices to vlan 100 or 200, with dot1x/radius replacing mac-based methods.

The lecture explains how VLAN tagging adds an extra header containing the VLAN ID to frames as they traverse switches, guiding frame delivery across switches and domains.

This lecture introduces isl encapsulation, a Cisco proprietary inter-switch link protocol that wraps frames with a 26-byte header and 4-byte trailer, enabling dirty tagging and a 15-bit identifier.

Learn how 802.1q acts as an open standard for trunking, inserting four bytes as smart or single tagging to add a protocol identifier and QoS control within ethernet frames.

Learn to configure inter-vlan routing with router on a stick across multiple switches, using trunks and subinterfaces for VLANs 20, 30, 40, 50, and 60.

Configure inter-vlan routing via switch virtual interfaces. Create VLANs 10, 20, 30, 40, 50, 60 and SVIs with IP addresses to serve as gateways.

Configure dynamic vlan with md5 authentication using radius, create users and groups, and apply a policy to wired ports via 802.1x on switches and ISE.

Apply a dynamic vlan lab to verify md5 authentication and session management between a test pc and switch, configuring identities, policies, and interface states for Shivah.

Learn to configure dynamic vlan with peap authentication, setting up radius server details, identities, groups, and policy rules on switches and access points.

Explore dynamic vlan lab with peap verification, configuring switch port 48, dhcp, and authentication to verify user sessions and ip address assignment.

Learn how VTP, a layer 2 trunking protocol, automatically propagates VLANs across switches, enabling centralized VLAN creation and management with server, client, and transparent modes.

Explore the VTP server mode as the default in switch practice, enabling creation and deletion of VLANs, processing and forwarding VTP updates, and storing information in flash memory.

Explore VTP client mode in switches, understand that it is not the default mode, cannot create or delete VLANs, and only accepts updates from the VTP server.

Discover how VTP transparent mode differs from server mode by allowing local VLAN creation and deletion while not updating or accepting VTP domain updates, yet forwarding updates on trunks.

Examine the default VTP configuration in switch networks, noting that the domain name, VTP password, and VTP mode default to server. The video highlights VTP versions 1, 2, and 3.

This lecture explains how VTP works, including domain name and password effects, update propagation, and configuration-number rules for accepting updates across switches.

Master VTP working requirements, including domain name and password matching, and trunk port connectivity between switches. Examine VTP versions 1 through 3 and the role of VTP messages.

Explains VTP messages, including advertisements and advertisement requests, detailing server and client roles, domain name, password, configuration data, subset advertisements, and sequence numbers.

Discover how VTP pruning prevents unnecessary broadcasts by filtering propagation across switches, and how enabling it on one switch automatically applies to all switches in the network.

Explore dynamic trunking protocol (DTP) and how Cisco switches auto-negotiate trunks over cross cables, highlighting default DTP behavior and manual options to configure ports as transport.

Explain native vlan in 802.1Q trunking, showing how untagged frames are forwarded on the native vlan and how switches handle tagging and flooding.

Explore how VTP operates in a hands-on lab, configuring domain names, server/client/transparent roles, pruning, and password settings, and observing update propagation across switches.

Apply the spanning tree protocol to prevent frame looping by placing interfaces in forwarding or blocking state, and ensure address learning and floods avoid broadcast storms and MAC-table instability.

Explore STP tasks: how the root bridge is elected by the bridge ID (priority plus MAC), and how designated and root ports use the lowest cost to forward traffic.

Explore bpdu basics, the bridge protocol data unit, where switches hello every two seconds to elect a root bridge. Learn about root-to-non-root and non-root-to-root bpdu configurations.

Understand how STP uses an implicit cost to influence designated port selection and root bridge election. Identify the default costs for common interfaces and how to adjust them.

Learn how STP selects the root bridge using default priority 32768 and the lowest MAC address, with the root bridge id and BPDU cost guiding port roles.

Explore how switches elect the root bridge in the stp process, as they exchange bpdu messages and compare bridge priorities, using the mac address to break ties.

Discover how STP uses root bridge election, DP and RP selection, and port costs to determine forwarding and blocking states, preventing loops.

Explore the three spanning tree protocol timers: hello time, forward delay, and max age, and how they drive hello transmissions and port states in listening and learning.

Explore the STP port states: disabled, blocking, listening, learning, and forwarding, and learn how each state affects data transmission, prepares for forwarding, and governs MAC learning.

The lecture introduces spanning tree protocol topology changes, detailing three types: direct changes (direct link down), indirect changes, and insignificant changes triggered by devices turning on or off.

Explore STP Portfast, the STP states (disable, blocking, listening, learning, forwarding), and how Portfast forces forwarding on activation for access ports.

Explore rapid convergence in the spanning tree protocol with uplinkfast, showing how non-root switches place the alternate port directly in forwarding when the root goes down, reducing downtime.

Learn how spanning tree elects root and port roles, and how backbone fast prevents inferior BPDU issues by querying neighbors to quickly reestablish a new root path.

Explore the spanning tree protocol (stp) in a lab setup, learning root bridge selection, port roles (root port, designated, blocking), and cost-based path decisions using mac addresses and link costs.

Explore STP port states, the 15-second listen/learning sequence, and how Portfast immediately moves a port to forwarding when a device becomes active, with configuration on access ports.

Learn how STP portfast accelerates port transitions by skipping listening and learning, jumping directly to forwarding when a port becomes active, and how to enable it per interface or globally.

This lecture explains spanning-tree uplink fast, showing how non-root switches quickly place an alternate port in forwarding state when the root port fails, reducing convergence time.

examine the STP uplink fast lab setup across switches one through four, configuring root priorities and enabling uplink fast to keep traffic forwarding when a link flaps.

Explore how STP backbone fast prevents inferior bpdu and speeds convergence after a root port or link failure, using neighbor queries and the blocking, listening, learning, and forwarding states.

Explore how spanning tree backbone fast prevents inferior BPDU updates, with hands-on lab steps to enable it on all switches and verify root port selection.

Explore STP root guard introduction and how it prevents unauthorized BPDUs from changing the root by keeping ports in root inconsistent state and blocking until topology stabilizes.

Explore STP root guard in a hands-on lab, configure root guard on designated ports across switches, observe blocking and unblocking when BPDUs arrive, and restore normal operation.

Understand how STP loop guard prevents bridging loops by placing non-BPDU receiving ports into a loop-inconsistent state, remaining silent until BPDUs arrive and returning to normal operation.

Enable loop guard on spanning-tree ports to block BPDU-less links and place them in a loop-inconsistent state. Observe that when BPDU arrives, the port remains silent and traffic resumes normally.

Explore how stp bpdu guard prevents rogue bpdu from becoming the root by placing offending access ports into an error-disabled state.

Enable bpdu guard on switch interfaces or globally, then verify that receiving a bpdu places the port in a disabled state, reinforcing correct spanning-tree behavior.

explain stp bpdu guard and bpdu filter on switch ports, showing guard takes action only when receiving bpdus, and filter blocks bpdus on access ports.

Perform a hands-on lab to enable BPDU filter on a switch, blocking STP BPDUs globally or on specific interfaces, and observe port states and spanning-tree behavior.

Learn how udld detects unidirectional link faults between switches connected by fiber cables, verifies bidirectional links by exchanging messages, and uses normal and aggressive modes to reestablish connections.

Explore the UDLD lab in switch, learn to enable UDLD on interfaces and interface ranges, compare normal and aggressive modes, and understand how unidirectional link detection shuts down troubled ports.