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Question about backbone networks

By mycroftH25 ยท 5 replies
May 19, 2015
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  1. Hey guys,

    I have question about backbone networks. Need Help!

    If an organisation has 3 departments.

    Key servers are in different departments โ€“ so a user from 1 department X reads and writes to file servers in another department Y. And both users access mail from a server in department Z.

    The traffic and broadcast storms originating in one department is causing bandwidth saturation in other departments.

    The core of the network is slow and is unable to meet the response time requirements of various critical business applications.

    What is the solution based on core technology design, LAN technologies and design solutions to address inter-departmental traffic issues?

  2. jobeard

    jobeard TS Ambassador Posts: 12,790   +1,506

    major faux paux. Broadcasts should not go beyond the current subnet.

    I would guess
    1. you're departments are co-located in the same building
    2. and all are on one subnet
    For large companies per the above, likely the 192.168.x.y is insufficient and your lan is using a subnet like 10.x.y.z for ease of network administration.

    Broadcasts should be limited to resource online/offline and contained within the network segment where the device is attached. Users / systems in HQ do not need the status of a printer going offline the the shipping department.

    • segment the departments into unique subnets
    • then add static routes between them according to their need
    eg: the company domain server would be needed by all (dept <-> srvr)
    including the email and directory system.

    FEW departments need access to the sales group or its data

    You need to analyze the departmental workflow to begin this project, and implement one network change at a time.
  3. jobeard

    jobeard TS Ambassador Posts: 12,790   +1,506

    Attached is a common layout (topology) - - how does it compare to yours?

    Attached Files:

  4. mycroftH25

    mycroftH25 TS Rookie Topic Starter

    The topology is similar but the departments.

    But the KEY servers are in different departments, which is directly affecting other departments.
    Causing bandwidth saturation and slow response times.

    The answer would focus more on LAN technologies and designs.

    Thanks so much, it got me thinking :)
  5. jobeard

    jobeard TS Ambassador Posts: 12,790   +1,506

    The router / dept stops the broadcast storms flooding the entire network
  6. jobeard

    jobeard TS Ambassador Posts: 12,790   +1,506

    Btw: DHCP has an impact with multiple routers - - really can't use a central DHCP in the DC for the whole site. (of course it still controls the DC itself)
    Resources under each router need DHCP assignments from that router, and fixed assets (servers & printers) need address reservation or static addressses. The central DNS still holds all such fixed assets.

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