logical network diagram, is dhcp server is in correct place?

Toggle sidebar Toggle sidebar
R

revenn

Commendable
Dec 29, 2016
3
0
1,510
Hello everyone!

I am a student and I am projecting a small network to school (for grade). My network is in two buildings. I wanted describe the network but better idea is place here logical network diagram:

sieci_projekt.png


Like you can see, there is DHCP server, 3 layer switches, 2nd layer switches, router itp. Is it logically correctly?

Because I'm not sure for example if I create some ranges on dhcp server, how does 3-layer switches is going to know which ip give to which vlan? (yep, there will be like 6 vlan's so also 6 ip adresses ranges)

Please tell me something about this? I don't want whole configuration etc, just a quick look of a specialist.


 
Solution
B
Technically it would work but it is really depends why you have the red and blue connections to all your servers and router. If it is to show redundant connections then that is fine but it is not simple to actually implement. If these are layer3 redundancy then you have the problem of your devices having 2 different ip addresses. You can solve this by running a routing protocol on end devices themselves and having them advertise a loopback address onto both connection. In general people do not run routing protocols on server but you can do it. Your other option is to run these layer 2 and let spanning tree do it but it tends to be a little slow to cut over. The best solution if your switches support it is to use port...
Sort by date Sort by votes
B

bill001g

Titan
Aug 9, 2012
28,325
2,755
125,640
You really only need 1 dhcp server in a whole company even when it has offices all over the world. You would need a extremely stable network to do that but it is done by large companies. Most people that are using microsoft put the function on their domain controller.

The magic that makes this work is a special feature in layer 3 switches that will forward DHCP messages to the DHCP server. It has inconsistent names between switches but in general it is called "ip helper"
 
Upvote 0 Downvote
R

revenn

Commendable
Dec 29, 2016
3
0
1,510
So I am setting ip adresses ranges on dhcp server and on layer 3 switches I'm not setting anything about IP? because teacher said that I neet this 3-layer switches but I don't know for what.

So my diagram is logicly correct?
 
Upvote 0 Downvote
B

bill001g

Titan
Aug 9, 2012
28,325
2,755
125,640
Technically it would work but it is really depends why you have the red and blue connections to all your servers and router. If it is to show redundant connections then that is fine but it is not simple to actually implement. If these are layer3 redundancy then you have the problem of your devices having 2 different ip addresses. You can solve this by running a routing protocol on end devices themselves and having them advertise a loopback address onto both connection. In general people do not run routing protocols on server but you can do it. Your other option is to run these layer 2 and let spanning tree do it but it tends to be a little slow to cut over. The best solution if your switches support it is to use port aggregation and bond the 2 device ports together. The key difference being that the instead of going to a single switch you go to 2 different ones. This is the method high end data centers user but the switches must have support for multichassis port aggregation.

You want a connection between the main switches also for redundancy purposes or even 2 if want to protect against a cable failure.

 
Upvote 0 Downvote
Solution
You must log in or register to reply here.

TRENDING THREADS

Latest posts

Moderators online

Share this page

COMPANY
RESOURCES
FOLLOW
Top Bottom