Personal Assignment 1 Session 2 NIM : 1412401470 Nama : KETI 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 outh !merica. Mr. Bob is in char"e of the net#or$ infrastructure, includin" routers and s#itches. His "roup includes personnel #ho can install and confi"ure %isco routers and s#itches. The Trust Oil and Gas %IO #ants to be"in mi"ratin" from the &oice net#or$ to an 'nified %ommunications ('%) solution to reduce circuit and mana"ement costs. *xistin" data +! circuits ha&e percent utilization or less but spi$e up to / percent #hen sporadic 0T1 transfers occur. Mr. Bob hands you the dia"ram sho#n in 0i"ure 2. The exitin" data net#or$ includes 3 sites #ith #ith approx approxim imatel ately y 3 people people at each each site. site. The net#or net#or$ $ is Multip Multiprot rotocol ocol 4abel 4abel #itch #itchin" in" (M14) +!, #ith approximately 5 people at the head6uarters. The +! lin$s ran"e from 3/7-$bps circuits to T2 speeds. 8emote-site applications include statisti- cal files and "raphicalsite dia"rams that are transferred usin" 0T1 from remote sites to the head6uarters.
0i"ure 2. Trust Oil and Gas %urrent et#or$ Mr. Mr. Bob #ants #ants a '% soluti solution on that that mana"es mana"es the ser&er ser&erss at head6ua head6uarte rters rs but still still pro&id pro&ides es redundancy or failo&er at the remote site. He mentions that he is concerned that the 0T1 traffic mi"ht impact the 9oI1 9oI1 traffic. He #ants to choose a site to implement a test before implementin" '% at all sites. The follo#in" 6uestions:directi&es refer to this case study;
2. +hat are the business re6uirements for Trust Oil and Gas<
5. !re there any business-cost constraints< 3. +hat are the net#or$=s technical re6uirements< 7. +hat are the net#or$=s technical constraints< . !pproximately ho# many I1 phones should the net#or$ support< >. +hat type of '% architecture should you propose< ?. +hat 6uality of ser&ice (@o) features #ould you propose for the +!< /. +hat 1o* recommendations #ould you ma$e< A. +ould you propose a prototype or a pilot< 2. +hat solution do you su""est for &oice redundancy at the remote sites< 22. ia"ram the proposed solution.
!ns#ers ; 2. The company #ants to pro&ide &oice ser&ices in a con&er"ed net#or$. 5. The solution should pro&ide reduced costs o&er the existin" separate &oice and data net#or$s. 3. he technical re6uirements are as follo#s; 1ro&ide I1 telephony o&er the data net#or$. 1ro&ide &oice redundancy or failo&er for the remote sites. 1re&ent 0T1 trafCc from impactin" the &oice trafCc. 7. The technical constraint is as follo#s; %all-processin" ser&ers need to be located at head6uarters. . There are 5 I1 phones at head6uarters, and 3 D 3 E 2 remote I1 phones, for a total of 25 I1 phones. >. 1ropose the +! centralized call-processin" architecture #ith a %allMana"er (%M) cluster at head6uarters. ?. 'se lo#-latency 6ueuin" (44@) on the +! lin$s to "i&e the hi"hest priority to &oice trafCc. Then deCne trafCc classes for re"ular trafCc and 0T1 trafCc. Ma$e band#idth
reser&ations for the &oice trafCc and maximum band#idth restrictions for the 0T1 trafCc. %all !dmission %ontrol (%!%) is recommended to limit the number of calls from and to a remote site. /. To pro&e that calls can run o&er the +! lin$s, implement a pilot site. The pilot #ould test the desi"n=s functionality o&er the +! #ith or #ithout 0T1 trafCc. A. 8ecommend the use of ur&i&able 8emote ite Telephony (8T) to pro&ide &oice ser&ices in the e&ent of +! failure, and reroute calls to the 1ublic #itched Telephone et#or$ (1T). 2. ho#s the dia"ram, #hich sho#s head6uarters and t#o remote sites for clarity. This architecture is duplicated for all remote sites. *ach site uses a &oice router that is connected to both the I1 +! and the 1T. 8T pro&ides &oice sur&i&ability in the case of +! failure. ! %M cluster is implemented at the head6uarters. The %M ser&ers are in the data center in a redundant net#or$.
