Table Of Content

ARCH Designing Cisco Network Service Architectures Version 2.0 Lab Guide 05.03.07 DISCLAIMER WARRANTY: THIS CONTENT IS BEING PROVIDED “AS IS.” CISCO MAKES AND YOU RECEIVE NO WARRANTIES IN CONNECTION WITH THE CONTENT PROVIDED HEREUNDER, EXPRESS, IMPLIED, STATUTORY OR IN ANY OTHER PROVISION OF THIS CONTENT OR COMMUNICATION BETWEEN CISCO AND YOU. CISCO SPECIFICALLY DISCLAIMS ALL IMPLIED WARRANTIES, INCLUDING WARRANTIES OF MERCHANTABILITY, NON-INFRINGEMENT AND FITNESS FOR A PARTICULAR PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE. This learning product may contain early release content, and while Cisco believes it to be accurate, it falls subject to the disclaimer above. ii Designing Cisco Network Service Architectures (ARCH) v2.0 © 2007 Cisco Systems, Inc. Table of Contents Lab Guide 1 Overview 1 Outline 1 Case Study 1: MegaCorp Campus Design 2 Activity Objective 2 Visual Objective 2 Required Resources 2 MegaCorp Campus Case Study Scenario 3 Campus Design: Business Factors 4 Campus Design: Technical Factors 5 MegaCorp Campus Design Tasks 6 Activity Verification 8 Case Study 2: CP Hotels Addressing and Routing Design 9 Activity Objective 9 Visual Objective 9 Required Resources 10 CP Hotels Case Study Scenario 10 CP Hotels Design Tasks 19 Activity Verification 20 Case Study 3: CP Hotels Network Initiatives 21 Activity Objective 21 Visual Objective 21 Required Resources 21 CP Hotels Case Study Scenario 22 CP Hotels Design Tasks 24 CP Hotels Design Tasks 24 Activity Verification 26 Case Study 4: CP Hotels Security and IPsec VPN Network 27 Activity Objective 27 Visual Objective 27 Required Resources 27 CP Hotels Case Study Scenario 27 CP Hotels Design Tasks 32 Activity Verification 33 Case Study 5: DS Medical Research Institute Network Infrastructure 35 Activity Objective 35 Visual Objective 35 Required Resources 36 DS-MRI Case Study Scenario 36 DS-MRI Design Tasks 37 Activity Verification 39 Answer Key 41 Case Study 1 Answer Key: MegaCorp Campus Design 41 Case Study 2 Answer Key: CP Hotels Addressing and Routing Design 45 Case Study 3 Answers: CP Hotels Network Initiatives 49 Case Study 4 Answer Key: CP Hotels Security and IPsec VPN Network 53 Case Study 5 Answer Key: DS Medical Research Institute Network Infrastructure 57 © 2007 Cisco Systems, Inc. Lab Guide iii iv Designing Cisco Network Service Architectures (ARCH) v2.0 © 2007 Cisco Systems, Inc. ARCH Lab Guide Overview This guide presents the instructions and other information concerning the activities for this course. You can find the recommended solutions in the Case Study Answer Key. Outline This guide includes these activities: This guide includes these activities: (cid:132) Case Study 1: MegaCorp Campus Design (cid:132) Case Study 2: CP Hotels Addressing and Routing Design (cid:132) Case Study 3: CP Hotels Network Initiatives (cid:132) Case Study 4: CP Hotels Security and IPsec VPN Network (cid:132) Case Study 5: DS Medical Research Institute Network Infrastructure Case Study 1: MegaCorp Campus Design This case study enables you to practice the skills and knowledge learned in the “Reviewing Cisco Network Service Architectures” and “Enterprise Campus Network Design” modules. This Case Study is based on a fictional company, MegaCorp. MegaCorp is a rapidly-growing and leading knowledge worker-based company with many large offices. They operate in the insurance, financial, marketing, services, and/or government areas of business. You represent a Cisco Premier Partner and have been called in by the CIO to review the MegaCorp design. The design is focused on their campus network. Activity Objective In this activity, you will create a high level design for the campus portions of the MegaCorp network. After completing this activity, you will be able to meet these objectives: (cid:132) Document and explain the real customer requirements for this scenario. (cid:132) Complete and present an optimal high-level design, including diagram, physical and logical topology descriptions, recommended switch models and alternatives, other significant details, notes on how your design will support IP Telephony, and notes on what your Power over Ethernet (PoE) recommendations are. Describe and defend the pros and cons for your optimal design, and how it improves on the existing MegaCorp design. (cid:132) Describe any other technical design factors the detailed design should incorporate. (cid:132) Present a high-level approach for how to smoothly migrate from the old to the new network design. (cid:132) Describe how to mitigate risks in the present MegaCorp design using Cisco switches. (cid:132) Complete and present a design using Metro Ethernet components as provided in this Case Study to connect to remote office buildings. Visual Objective There is no visual objective for this case study. Required Resources These are the resources and equipment required to complete this activity: (cid:132) Case Study guidelines, presented in the Course Introduction (cid:132) MegaCorp Campus Case Study Scenario, presented here in the Lab Guide (cid:132) A workgroup consisting of two to four students (cid:132) Blank sheets of paper and a pencil 2 Designing Cisco Network Service Architectures (ARCH) v2.0 © 2007 Cisco Systems, Inc. MegaCorp Campus Case Study Scenario MegaCorp has a large campus network supporting 10,000 users. The campus consists of 8 equally-sized buildings. Each building has 5 floors of approximately 30,000 square feet per floor with 2 wiring closets (A and B) per floor. The present campus network uses a design recommended by their present switch vendor, who is no longer in business. The design uses stackable switches in a daisy-chain in each closet. The end switches in each daisy chain connect to a pair of building switches. Spanning tree is disabled in the closets – the switches detect link state loss and only activate one of the two uplinks at a time. Access ports are 10 Mbps and uplinks 100 Mbps in many cases. The two building switches are connected with a trunk to each other. Each building switch connects back to one of the two core switches. The core switches have a link between them and operate at Layer 2 only. All the uplinks and the connecting link are in one VLAN. The building switches route the building subnets into the one core VLAN, which every building switch is connected to. The present design uses one VLAN per department. Real-estate “wars” have led to departments being spread over different parts of different floors in each building. Shuffling ports to different VLANs to support personnel moves keeps several recent technical institute grads busy. MegaCorp thinks their current network is very stable. They only have an outage every month or two, and staff can usually fix them within an hour by turning off one of the two building switches. In the evening, they power it up, and disconnect switches until the STP problem is found. The staff doesn’t mind the overtime pay. © 2007Cisco Systems, Inc. Lab Guide 3 The following diagram showing is provided for your convenience. L2 only L2 only L3 hop between building and core VLANs Campus Design: Business Factors The MegaCorp networking staff has lots of switching experience, but little technical depth on how switching and routing work. They like to keep things simple. (“This is the power plug.”) MegaCorp has approached your firm as a reseller. They asked for a quote on Cisco equipment to replace their existing equipment, using the existing topology, cabling, and overall design approach. They have received the equipment quote already. The CIO thinks the networking staff is fairly skilled, but has occasional doubts. Yet the CIO said “my staff has lots of advanced experience”. The CIO wants you to provide a second opinion on the networking staff’s design. The CIO mentioned compliance with recommended practices, taking advantage of new technology, high speed networking, data / voice convergence, 24 x 7, and high availability. In short, you are getting mixed signals from the customer. The CIO did indicate that the PBX is due for replacement with IP Telephony, and MegaCorp hopes to take advantage of some of the Cisco Call Center functionality. The CIO is well aware that stability is important for those technologies to work well. And what is this Cisco TelePresence that the Cisco Account Manager mentioned? The CIO also specifically mentioned the Cisco collaboration with Nokia and Motorola, to produce hybrid cell and 802.11 phones. At this time, you are not expected to design for IP Telephony except for the influence your campus switch design. 4 Designing Cisco Network Service Architectures (ARCH) v2.0 © 2007 Cisco Systems, Inc. The company is now using the offices from 6 AM to 12 midnight, with different people working different hours to service customers in different time zones. Many cubicles are virtualized or used for hoteling, with different occupants at different times or on different days. MegaCorp prides itself on providing good customer service. Campus Design: Technical Factors You conducted a network baseline. The baseline monitoring indicates that there is a moderate degree of STP instability in the current network. This causes bursts of 50 second outages that employees do not complain about, because they have gotten so used to them. There is evidence that the 100 Mbps uplinks from the closets are congested. The technical staff think Cisco VTP sounds interesting, as it might save having to create VLANs on switches to support moves, adds, changes. The CIO wants more availability than MegaCorp has at present, and has specifically asked for a design using three building switches instead of two, to get better availability. The network staff asked that the switches quoted be “IPT and wireless ready”, whatever that means. The draft Bill of Materials given you by the technical staff indicates a plan for all switches to be equipped for Power over Ethernet (PoE) on all ports. They also asked for an option for equipment without PoE since power injectors sound less costly to some of the lead technical staff. © 2007Cisco Systems, Inc. Lab Guide 5 MegaCorp Campus Design Tasks Complete these steps: Step 1 Determine what MegaCorp’s business and technical requirements really are (or should be), and how to convince MegaCorp that you are correct. (Do not spend a lot of time on this.) _______________________________________________________________ _______________________________________________________________ _______________________________________________________________ Step 2 Determine a recommended design, and its pros and cons, as well as how it improves the current MegaCorp design. Diagram the design, and use bullet lists to itemize specifics. Be prepared to justify any changes to the MegaCorp plan that you propose. Include in your plans: (cid:131) Physical topology (port counts, links, and link speeds, diagrams) (cid:131) Logical topology (VLAN locations and scopes, Layer 2, Layer 3, other protocols (VTP, STP choice, STP settings, routing protocol, First Hop Routing Protocol, etc.) (cid:131) Recommended switch models and alternatives (cid:131) Other significant details (cid:131) Plans for IP Telephony support (cid:131) Recommendation for PoE _______________________________________________________________ _______________________________________________________________ _______________________________________________________________ Step 3 Identify other technical design elements that the detailed design should include (e.g. type of STP, security measures, etc.) _______________________________________________________________ _______________________________________________________________ _______________________________________________________________ Step 4 Provide a high level plan for how the network could be smoothly migrated over to the new equipment over several months. _______________________________________________________________ _______________________________________________________________ _______________________________________________________________ 6 Designing Cisco Network Service Architectures (ARCH) v2.0 © 2007 Cisco Systems, Inc.