Router# configure terminal Router(config)# interface gigabitethernet 0/0 Router(config-if)# no shutdown Router(config)# interface gigabitethernet 0/0.10 Router(config-subif)# encapsulation dot1Q 10 Router(config-subif)# ip address 192.168.10.1 255.255.255.128 Router(config)# interface gigabitethernet 0/0.20 Router(config-subif)# encapsulation dot1Q 20 Router(config-subif)# ip address 192.168.10.129 255.255.255.192 Use code with caution. Phase 4: Dynamic IP Allocation (DHCPv4 Server)
The objectives of the case study are:
Understand REST API architectures (Northbound vs. Southbound APIs).
static routing until a permanent dynamic routing solution is decided. Core Phases of the Revision B Case Study
Because different VLANs reside on separate subnets, a Layer 3 device must route traffic between them. In Rev B, this is typically handled via a approach or Layer 3 multi-layer switches. Router-on-a-Stick Subinterface Blueprint ccna-2v7.0 case study -rev b-
A critical best practice reinforced in Rev B is the modification of the native VLAN from the default VLAN 1 to an unused VLAN (e.g., VLAN 99) to prevent VLAN hopping attacks. The command switchport trunk native vlan 99 is applied. Additionally, switchport mode trunk and explicitly allowed VLANs using switchport trunk allowed vlan add ... ensure only required traffic traverses the trunk.
To successfully integrate these business networks, administrators must implement an optimized, secure topology utilizing dual-stack infrastructure, robust layer 2 mitigation, and structured edge routing. This article provides a comprehensive technical breakdown of how to solve the entire case study. Core Technical Pillars
Common troubleshooting issues include mismatched native VLANs, incorrect subinterface encapsulation, and missing default gateways on hosts.
. It simulates a real-world scenario where a company (often identified as the Carl I. Samson Company or C.I.S. Co) has acquired another business with multiple locations, requiring a unified, secure network infrastructure. Core Objectives & Scenario static routing until a permanent dynamic routing solution
OSPF will fail to form adjacencies if network statements or area assignments are mismatched.
: Configured on all access ports to allow rapid client transitions while preventing rogue switches from introducing spanning-tree loops.
Mitigate Rogue DHCP servers by configuring untrusted ports and enabling option 82.
: Allocates appropriate host headroom for desktop infrastructure. 20 root primary spanning-tree vlan 30
VLAN segmentation, Inter-VLAN routing, and Spanning Tree Protocol (STP).
To build a secure, functional network during this corporate merger, network administrators must configure . 🛠️ Case Study Overview and Topology
The Revised B case study often emphasizes advanced static routing and IPv6 connectivity. 3.1 Layer 3 Switch and Router Interfaces
spanning-tree mode rapid-pvst spanning-tree vlan 10,20 root primary spanning-tree vlan 30,99 root secondary Use code with caution. 3. Inter-VLAN Routing & Redundancy