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Nama : Abdul Karim NIM : 1412401054 MK : IT Network Governance Personal Assignment 1 Session 2 Mr. Bob is an IT director at Trust Oil and Gas, a medium-sized petrochemical company based in Houston. It also has operations in the Gulf of Mexico and in South America. Mr. Bob is in charge of the network infrastructure, including routers and switches. His group includes personnel who can install and configure Cisco routers and switches. The Trust Oil and Gas CIO wants to begin migrating from the voice network to an Unified Communications (UC) solution to reduce circuit and management costs. Existing data WAN circuits have 50 percent utilization or less but spike up to 80 percent when sporadic FTP transfers occur.

Tugas 1 Abdul Karim

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Nama

: Abdul Karim

NIM

: 1412401054

MK

: IT Network GovernancePersonal Assignment 1Session 2Mr. Bob is an IT director at Trust Oil and Gas, a medium-sized petrochemical company based in Houston. It also has operations in the Gulf of Mexico and in South America. Mr. Bob is in charge of the network infrastructure, including routers and switches. His group includes personnel who can install and configure Cisco routers and switches.

The Trust Oil and Gas CIO wants to begin migrating from the voice network to an Unified Communications (UC) solution to reduce circuit and management costs. Existing data WAN circuits have 50 percent utilization or less but spike up to 80 percent when sporadic FTP transfers occur.

Mr. Bob hands you the diagram shown in Figure 1. The exiting data network includes 35 sites with approximately 30 people at each site. The network is Multiprotocol Label Switching (MPLS) WAN, with approximately 200 people at the headquarters. The WAN links range from 384-kbps circuits to T1 speeds. Remote-site applications include statisti- cal files and graphical-site diagrams that are transferred using FTP from remote sites to the headquarters.

Figure 1. Trust Oil and Gas Current Network

Mr. Bob wants a UC solution that manages the servers at headquarters but still provides redundancy or failover at the remote site. He mentions that he is concerned that the FTP traffic might impact the VoIP traffic. He wants to choose a site to implement a test before implementing UC at all sites.

The following questions/directives refer to this case study:

1. What are the business requirements for Trust Oil and Gas?

2. Are there any business-cost constraints?

3. What are the networks technical requirements?

4. What are the networks technical constraints?

5. Approximately how many IP phones should the network support?

6. What type of UC architecture should you propose?

7. What quality of service (QoS) features would you propose for the WAN?

8. What PoE recommendations would you make?

9. Would you propose a prototype or a pilot?

10. What solution do you suggest for voice redundancy at the remote sites?

11. Diagram the proposed solution.Jawaban.No 1

Pesyaratan bisnis minyak dan gas bumi adalah Perusahaan ingin memberikan layanan suara di jaringan terkonvergensi.No 2

Kendala bisnis-biaya adalah Solusinya harus menyediakan biaya berkurang melalui jaringan suara dan data yang ada terpisah.No 3.Persyaratan teknis jaringan adalah sebagai berikut: Memberikan IP telephony melalui jaringan data. Memberikan redundansi suara atau failover untuk daerah terpencil. Mencegah lalu lintas FTP dari berdampak pada lalu lintas suara.

No 4.Kendala teknis jaringan adalah sebagai berikut: Panggilan-pengolahan server harus berada di kantor pusat.

No 5.Ada 200 telepon IP di kantor pusat, dan 35 * 30 = 1.050 telepon IP jarak jauh, dengan total 1250 telepon IP.No 6.Mengusulkan arsitektur panggilan pengolahan terpusat WAN dengan CallManager sebuah (CM) klaster di kantor pusat.No 7.Gunakan low-latency antrian (LLQ) pada link WAN untuk memberikan prioritas tertinggi untuk menyuarakan lalu lintas. Kemudian menentukan kelas lalu lintas untuk lalu lintas biasa dan lalu lintas FTP.Membuat reservasi bandwidth untuk lalu lintas suara dan pembatasan bandwidth maksimum untuk lalu lintas FTP.Penerimaan panggilan Control (CAC) dianjurkan untuk membatasi jumlah panggilan dari dan ke situs remote.

No 8.Untuk membuktikan bahwa panggilan dapat menjalankan lebih dari link WAN, mengimplementasikan situs percontohan.Pilot akan menguji fungsi desain selama bertahun-WAN dengan atau tanpa lalu lintas FTP.No 9.Merekomendasikan penggunaan Survivable jauh Site Telephony (SRST) untuk menyediakan layanan voice dalam hal kegagalan WAN, dan mengubah rute panggilan ke Public Switched Telephone Network (PSTN).

No 10.

Diagram solusi yang diajukan.

Gambar diatas menunjukkan diagram, yang menunjukkan markas dan dua lokasi terpencil untuk kejelasan. Arsitektur ini diduplikasi untuk semua situs remote.Setiap situs menggunakan router suara yang terhubung ke kedua IP WAN dan PSTN.SRST menyediakan bertahan hidup suara dalam kasus ini dari WAN kegagalan.Sekelompok CM dilaksanakan di kantor pusat.Server CM berada di data center dalam jaringan berlebihan