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In this case study, you will choose the better of two solutions for your network and justify your choice.
1. | Consider the following scenario. Your team is a group of highly paid consultants for a small, developing country. MPLS technology has been selected because of its traffic-engineering capabilities. This system will require traffic engineering to help manage increases in traffic as the network grows. On the Web, research the benefits and drawbacks of ordered control vs. non-ordered control; then recommend a solution for the LDP protocol. What are your recommendations ? |
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2. | Now do the following:Answer the following questions.
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Answers
1. | This group exercise and case study were designed for real-time study. The information listed below may change over time, so it is recommended that this research be conducted by each student of this course Ordered control vs. independent control was not an issue at the time - just as cut-through switches vs. store and forward switches were not issues. The technology has advanced significantly since the start of MPLS. Currently several manufacturers offer independent control for start-up and ordered control after the network links are established |
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In this exercise, you will work with RFC 3036 and translate LDP messages. Use RFC 3036 to find the correct answers.
1. | Match the correct message type number in hex to the correct title of the message by recording the correct message number in the space provided. Message type numbers available for selection are:
0001, 0100, 0200, 0201, 0300, 0301, 0400, 0401, 0402, 0403, 0404 ____ Address Message ____ Address Withdraw ____ Hello ____ Initialization ____ Keep Alive ____ Label Abort Request ____ Label Release ____ Label Request ____ Label Withdraw Message ____ Labels (Series) ____ Notification |
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2. | Type Length Values (TLVs) are a subset of LDP messages. Match the correct TLV number in hex to the correct title of by recording the correct message number in the space provided.TLV numbers available for selection are: 0101, 0103, 0104, 0201, 0202, 0300, 0400 ____ ADDRESS LIST ____ ATM ____ FRAME RELAY ____ HOP COUNT ____ KEEP ALIVE ____ PATH LINK ____ STATUS |
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3. | In the hello message in Figure 2.19, fill in the message type number and the TLV number. |
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Answers
1. | See Section 3.7 of RFC 3036. 0300 Address Message 0301 Address Withdraw 0100 Hello 0200 Initialization 0201 Keep Alive 0404 Label Abort Request 0403 Label Release 0401 Label Request 0402 Label Withdraw Message 0400 Labels (Series) 0001 Notification | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
2. | Please refer to the tables in the following answer explanation. 0101 ADDRESS LIST 0201 ATM 0202 FRAME RELAY 0103 HOP COUNT 0400 KEEP ALIVE 0104 PATH LINK 0300 STATUS The following tables are from the reference sheets for RFC 3036.
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