I have been given the task of creating a network diagram for my newly located company. As a novice of networks, it would be great if you could iron out some of my problems...
Could anyone point me in the direction of online methodologies for designing such a diagram, ranging from a high, to a very low level of detail. The site is about 1km long (at it's greatest) with 11 seperate buildings all connected to a central comms room.
Are there any standards to which I should follow??
NetViz is a very good tool for making network diagrams with ultra detail ranging from geographical level to a very low level detail.
If you have Microsoft Visio Prof, You could use different tabs to indicate each level, starting with a high level geographical overview, then moving on to a general network diagram (without ip addresses and other details), and then move on to individual locations (which gives more details on IP addresses etc).
With network diagrams you often find that by determining exactly what you want the structure of the diagram will determine itself. The types of diagrams will generally fall into either the logical or physical categories, and can then be drawn accordingly.
It may be that you would like to know where the network equipment is situated in each building, so a series of diagrams for each building could be drawn showing where each item is located within a comms rack. Alternatively, you may be more interested in the physical connections, in which case you could start with a high level diagram of the 11 buildings, with just the one or two routers in each that handle the inter-building connections shown. You could then have further diagrams for each building to show the internal connections to other routers / switches / critical servers etc. with the diagram constructed to clearly show the interconnections rather than the precise location of the equipment.
A logical diagram may be more concerned with the location of VLANs and associated trunks, IP numbering domains etc. This can be high level, showing which VLANs / IP ranges are used within the various switches, trunks or buildings, or low level where you indicate which VLAN is assigned to which port.
One word of advice - unless your network is incredibly stable, don't go down to too much detail on the diagrams as they will either require a large amount of maintenance to record moves and changes, or go out of date quickly. Show what is required to help you in your job, especially in troubleshooting situations, and no more.
I'm afraid I haven't got any links I can give you at the moment as all the diagrams I have are internal and relate to customers. If I manage to find anything else I'll post it, but don't hold your breath!!
[toc:faq]The ProblemOn traditional switches whenever we have a trunk
interface we use the VLAN tag to demultiplex the VLANs. The switch needs
to determine which MAC Address table to look in for a forwarding
decision. To do this we require the switch to do...
[toc:faq]Introduction:Netdr is a tool available on a RSP720, Sup720 or
Sup32 that allows one to capture packets on the RP or SP inband. The
netdr command can be used to capture both Tx and Rx packets in the
software switching path. This is not a substitut...
IntroductionOSPF, being a link-state protocol, allows for every router
in the network to know of every link and OSPF speaker in the entire
network. From this picture each router independently runs the Shortest
Path First (SPF) algorithm to determine the b...