Questions tagged [topology]
For questions about network topology, where a network topology is the arrangement of a network, including its nodes and connecting lines.
74 questions
2 votes
1 answer
548 views
Why is the spine-leaf topology non-blocking?
I understand that a Clos switch network is non-blocking when the number of spine switches—corresponding to the middle stage in a three-stage Clos architecture—is at least equal to the number of uplink ...
- 23
2 votes
1 answer
226 views
Using NAT to isolate multiple network with the same IP space
I'm trying to create a network architecture that allows multiple identical IP space to be isolated with one and the other. To do so, I'm thinking that NAT could do this with the following topology. ...
- 121
2 votes
1 answer
115 views
MSTP Path Selection Issue in Ring Topology (Juniper EX2300-C & Cisco 3560-CX)
I'm currently setting up a prototype ring (or small mesh) network using MSTP, and I'm running into an issue with path selection. The network consists of three switches: Switch N: Juniper EX2300-C (...
- 21
0 votes
1 answer
89 views
3 firewalls on a layer-2 switch, 1 acts as a default gateway for all devices
I am currently trying to setup a network madeup of a large layer-2 switch, some computers connected to that switch, 3 Cisco Firepower 1120 ASA Firewalls, and other networks beyond 2 of the firewalls, ...
2 votes
3 answers
144 views
Dumb question about OSPF with router-on-a-stick
Suppose that we have several sites connected using fiber Ethernet, with each site having its own router. But due to certain requirements1, the routers cannot be connected point-to-point directly – ...
- 389
0 votes
2 answers
859 views
DNS - DMZ or internal zone & firewall topology
I'm kind of new to networking. Suppose that all my VLANs have access to the web server and authoritative DNS server but only VLAN 40 has access to the Internet while VLANs 10, 20 and 30 do not have ...
Jun
1 vote
2 answers
318 views
should I go multiple switch or one big switch
So I have a 2.5Gbps NIC on my server PC, but my main questions are: note: I'm using consumer grade switches will a 2.5Gbps switch split the load with two 1 Gbps switch? will the 1Gbps be better on ...
- 13
-1 votes
2 answers
776 views
Why is inter-VLAN communication not working in my network set-up in Cisco Packet Tracer?
I have created a simple bus topology connecting 2 switches and a router, with each switch connected to their respective end devices through ordinary star topology. The switch model used was 3560-24PS ...
- 13
0 votes
1 answer
166 views
Is a Token Ring network a bus?
[This is a question I have realised has been bugging me since I had to learn about Token Rings, 30-odd years ago. I clearly have a wrong understanding here, but I never managed to figure it out.] I ...
- 109
3 votes
1 answer
2k views
Setting up a pfsense router between two private subnetworks
I have a situation like in the picture: I want to add a pfsense router inside an existing 192.168.1.0/24 subnet and have these possibilities: I want the 192.168.73.0/24 network to have access to the ...
- 31
0 votes
0 answers
19 views
Is is possible to create a network using supernetting like this? [duplicate]
I need to create a network in the range 200.1.x.x and split it into 3 LANs which consist of 1250, 1750, and 1500 hosts respectively. This network should be able to expand to a total of 56 networks. ...
- 1
1 vote
1 answer
741 views
Hot potato routing topology
Im trying understand hot-potato routing better using this diagram that I have made. It shows R1 and R2 in automous system 1 (AS1) are receiving full routes from their parent providers P1 and P2 ...
- 55
1 vote
1 answer
656 views
What are the stages in a 5-stage clos network?
A 3-stage clos topology makes sense to me. You have servers->leaves->spines. However you see at the bottom of that same page it has a "Clos three-tier network with superspines". That ...
- 221
0 votes
2 answers
125 views
Which access methods and topologies are used for 10/40/100 Giga Ethernet?
So I'm learning about different Ethernet types and it's stated that the Standard Ethernet operates at Bus/Star and uses CSMA/CD as an access method. The same is stated for Fast Ethernet and Giga ...
0 votes
2 answers
725 views
what is the main function of root bridge and ring master?
When we learn the STP or RSTP,we all learn the election of root bridge, the lowest priority number or MAC address of switch will become the root bridge.So here is my first question: 1.So what can the ...
- 91