I have a three floor admin building which houses 300 staff with the possiblity of another 90 over the next three years. Top floor houses the admin team, the remaining two floors house the customer service team. At present the LAN has three network segments connecting to a single router in the building,
with either a 10Mbps or 100Mps switch on each floor. Cabling is copper throughout, and the wiring plan has evolved in an adhoc way over a number of years. There appears to be no redundancy within the wiring. The servers are within the same network segment as some of the staff
computers. I need to design a LAN upgrade that will be able to support the above, but am finding this a lttle difficult..
The aim is produce a cost effective solution. I am not required to give specific costings.
My upgarde solution should be sufficient for an increase of 150% traffic, should optimise performance and use of resources. Any additons to the network must be justified.The document does not states any equipment being used at the moment.
To let you understand this is one of the main headquaters, the other being Birmingham. The analysis and findings from the current network below:
Glasgow's LAN has three network segments connecting to a single router in the larger building,with either a 10Mbps or 100Mps switch on each floor. Cabling is copper throughout, and the wiring plan has evolved in an adhoc
way over a number of years. There appears to be no redundancy within the wiring. There is currently no network infrastructure in the warehouse building. The Glasgow servers are within the same network segment as some of the staff computers. Birmingham's LAN has a single network segment. LAN performance within the main sites is unsatisfactory due to excessive traffic within many parts of the network, and reliability is poor.
Quick and dirty recommendation would be to replace all IDF switches with 4500 series switches. All capable of doing layer 3. This will be your access layer.
All feeding back to a Data Center, MDF, locaiton to another 4500 used as your distro layer, which is then connected to your router, your core layer.
In the distrobution layer you will connect servers in the DC and dual feed all the IDF's to either two 4500 distro switches or dual supervisor engines in the one chassis.
For all servers you will dual home them into 2 different chassis or cards.
Replace copper uplinks with dual fiber runs.
You could get away with running 3750G stacks in the IDF's. This allows for single control of the entire switch stack and not seperate devices which will save some of the cost of going for the big guy of the 4500's. You can build VLAN's to allow access to only specific networks and restrict Internet access to only those allowed to access.
This will give you a high bandwidth and high availability in your design. This is very high level but should help point you in the right direction.
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