London Met COM 635 Assignment.

Department of Computing BSc(Hons) Computer Networks and Security ASSIGNMENT Level: 6 (Full-time equivalent Year 3) Module: COM635 Network Management Assignment: Routing protocol design Issue date: Review cut-off: ...

Department of Computing BSc(Hons) Computer Networks and Security ASSIGNMENT Level: 6 (Full-time equivalent Year 3) Module: COM635 Network Management Assignment: Routing protocol design Issue date: Review cut-off: Week Beginning Submission deadline: 10:30 am, Sunday 26th July 2020 Estimated completion time: 25 hours Set by: Nigel Houlden Verified by: Vic Grout To be completed by student: I certify that, other than where collaboration has been explicitly permitted, this work is the result of my individual effort and that all sources for materials have been acknowledged. I also confirm that I have read and understood the codes of practice on plagiarism contained within the Glyndwr Academic Regulations and that, by signing this printed form or typing my name on an electronically submitted version, I am agreeing to be dealt with accordingly in any case of suspected unfair practice. Name: ------------------------------------------------------------------ ------------ Student number: ------------------------------------------------------------------ ------------ Date submitted: ------------------------------------------------------------------ ------------ Signature: Are extenuating circumstances being claimed? YES / NO If so, give reference number: ----------- --------------------------- To be completed by lecturer: Summary of specific feedback on this work:Summary of advice for improvement of future work: Detailed comments follow, either on separate sheets or annotated to student’s work … Grade/Mark: Assignment Brief The selection of an appropriate Routing Protocol is an important management decision; it must fit with the network design overall and be scalable. To give you a deeper insight into why the choice of Routing protocol is important, you are tasked to design your own. For this assignment you are to design a theoretical routing protocol. During your lectures you will have covered how many of the more common Routing Protocols calculate ‘cost’, use metrics and how frequently they pass updates. Your final design although theoretical must work with the Internet Protocol (IP): either IPv4, IPv6 or both. You must consider the factors above and others that you think are relevant when designing your Routing Protocol. Your submission should be a 3000 (±10%) word report. Tables, references and diagrams will not be included in the word count. The submission must be via Moodle in Microsoft Word format. Example (non-exhaustive) [1] Equation [1] gives the cost calculation for EIGRP, indicating the K values and which metrics they influence, your Routing Protocol must have a cost calculation. The calculation you produce will obviously include metric(s) values, you must justify why you have made these selections. C=(k1b+256 k2b−l +k3d)(k r−5 k4 )Figures 1 and 2 show the packet format and the internal packet route format for EIGRP, the structure of figure 2 is a Type, Length, Value (TLV) that fits in to the EIGRP packet format. Table 1 gives the description of each field in the EIGRP packet format. Your design should have similar figures showing the structure of a routing packet. Version (8) Opcode (8) Checksum (16) Flags (32) Sequence Number (32) Acknowledgment Number (32) Autonomous System Number (32) Type (16) Length (16) Value (32) Other Type, Length and Value (TLV’s) Figure 1 EIGRP Packet Format Next Hop (32) Delay (32) Bandwidth (32) MTU (24) Hop Count (8) Reliability (8) Load (8) Reserved (16) Prefix Length (8) Destination (8 / 16 / 24 / 32) Figure 2 EIGRP IP Internal Route Packet Format Field Description Version Identifies the EIGRP process version Opcode Identifies the EIGRP packet type – Update (0x01), Query (0x03), Reply (0x04), Hello (0x05). It determines the TLVs that follow the EIGRP header. Checksum The checksum of the entire EIGRP packet, excluding the IP header. Flags 1st LSB bit (0x00000001) – Initial bit, used indicate the first set of routing updates upon establishing a new neighbour relationship. 2nd LSB bit (0x00000002) – Conditional Receive bit, used in the Cisco proprietary reliable multicast protocol – Reliable Transport Protocol (RTP). Sequence & Acknowledge Used by RTP for reliable EIGRP message exchange. Type / Length / Value TLVs are comprise of a 16-bit Type field, a 16-bit Length field, and a vary number of fields depends on the type of TLV. General TLVs: 0x0001 – EIGRP parameters – K values and hold time. Size of 12 bytes. 0x0002 – Message Digest 5 (MD5) authentication data. Size of 40 bytes. 0x0003 – Sequence. Used by RTP. 0x0004 – Software versions – IOS and EIGRP release versions. Size 8 bytes.0x0005 – Next Multicast Sequence. Used by RTP. 0x0006 – EIGRP stub parameters. IP TLVs: 0x0102 – IP internal route. Size of 28 bytes. 0x0103 – IP external route. Size of 48 bytes. Table 1Description of EIGRP Packet Structure Your design should have originality, justification, simplicity and a packet structure. Guidance Students are encouraged to make a prompt start on assignment work and are given appropriate support to do so. All material submitted for review by the cut-off date above will receive formative feedback allowing the work to be developed and improved. Any guidance given after the cut-off date above may, depending on its level and nature, be taken into account in the grading criteria that follow. Also note that, although it will be fairly easy, to come up with a cost/objective metric/function and packet structure, higher marks will only be gained for properly assessing and justifying your choices.