Questions tagged [design]

For questions about planning and implementation of a computer network. Use this tag when you have questions about how to design your network and what things to take into account when implementing a new network infrastructure.

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32 views

SFP/SFP+: Extender? F/F panel passthrough?

My primary question is this: Is it possible to have a simple passive SFP/SFP+ bulkhead passthrough connector, with two female SFP/SFP+ sockets facing opposite directions and wired directly together, ...
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2answers
23 views

'Flat' FlexVPN Network Design with multi gateways [duplicate]

The use case is a meshed ip radio network where the radio's move around alot. Multiple gateway's (FlexVPN Spokes) are statically located to re-bridge the meshed radio network when the radio's travel ...
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5answers
3k views

Cascading Switches. Will it affect performance?

I am really new to large scale networking and all I know is the basics. I will be doing a network for a huge workspace consisting of multiple offices. There will be a total of 308 Clients, with at ...
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4answers
143 views

Carving out a /28 network and still maintaining access to parent /24 network

In the diagram below, I'd like to carve out a /28 network from 192.168.0.0/24 and move it to another geographical location and still maintain access in and out of the original /24 network. ...
1
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1answer
42 views

Help with network setup [closed]

I have the following situation: Router 2 is a given. It is used by several people to go on the internet ('People we don't trust'). We are a tiny company that is supposed to go on the internet ...
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1answer
56 views

How to change ip TTL=1 on flat network for security [closed]

Working on a network at an high rise apartment complex. They have a core router/firewall acting as dhcp server and about 7 switches (all l3 switches). They have a few vlans to segment traffic based of ...
2
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0answers
36 views

Question about creating Subnets for a large amount of sites that will make a site-site tunnel to our datacenter [closed]

Our data center network is: 10.20.44.X/24 I want to have our sites use 10.X.X.X/24 (Site Number, VLAN, host) EG: Site 30 10.30.10.X/24 10.30.20.X/24 10.X would be corporate network 20.X would be ...
4
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2answers
373 views

why do we use a layer 2 switch in a DMZ rather than a layer 3?

I've been trying to learn about DMZs. It's hard to find a technical explanation that does not dive head long into the complexities of Cisco hardware, which I'm finding confusing as I'm new to ...
2
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4answers
155 views

What happens if I connect several switches together in a loop?

Suppose I want to network a stadium and I have 20 switches connected in a loop. My goal is to be able to connect a laptop to any of the switches and connect to the network and limit my TTL going ...
1
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1answer
94 views

What is difference between “topology of network” and “geometry of network”?

In the Internet some times, we hear of the term "geometry of the network": https://bit.ly/2VqI2YO Is there any difference between the term of "geometry of the network" and "topology of the network"? ...
2
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0answers
84 views

Is this a valid OSPF topology?

In the following topology: every Backbone router is an ABR. Router 2 belongs to three different areas, area 0, area 1, and area 4. is this a valid topology for OSPF ? it works as expected and it ...
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1answer
24 views

config of cisco 2950 switches [closed]

i have a cisco sw 48 port and 2 are gb ports. i have 4 servers and most of the ports are directly connected to the users i.e access port and some are going to the tp link switches and some are going ...
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2answers
122 views

Creating a network for three separate businesses in one building

What would be best practice in terms of creating a network to satisfy three separate businesses located in one building? The building in question has three floors, each floor has 25 workstations and ...
2
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1answer
385 views

Configuring multiple subnets with switch connected to single router interface

I have a design like this But I'm receiving a lot of mismatch errors and it doesn't work at all. I tried to ping 10.0.0.1 to no avail. I'm trying to configure the vlans on the switch 1 this way (...
4
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2answers
875 views

Internet structure and ISP networks in detail

I am studying about internet structure, ISPs and their interconnection. However, I have trouble connecting some terms and understanding the greater infrastructure of internet in more detail. I will ...
1
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0answers
48 views

How to design network with high availability in a multilevel small workplace [closed]

I want to create a network in my work 4 floors 50m2*4 workplace. Requirements are simple: Share internet ( < 20mb/s ADSL) while blocking someone from abusing download speed for long period. (...
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1answer
71 views

Trade Floor Network Design Feedback [closed]

I have an assignment that I am working on. Now I admit, I am far from knowledgeable and I have nowhere to turn to for help at the moment. I am not asking for someone to complete the assignment for me, ...
0
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1answer
417 views

Is forwarding rate important for selecting a collapse core switch in IP camera implementation?

I need to select a core switch that will connect my access switch to an IP surveillance's server. The point is that in my network I'll have 109 IP camera sending real time traffic to the server and I'...
3
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1answer
243 views

OSPF Area Design

Have a hub and spoke design where each Branch has a single router with a WAN connection to DataCenter1 Hub and another WAN connection to DataCenter2 Hub. There is no OSPF running elsewhere in the ...
4
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3answers
802 views

Theoretical: Bottleneck in a switch stacking environment

Quick question regarding stacking environments and their limitations regarding traffic bottlenecks. Assuming the following use case: We have a stack of 8 switchs, forming a Half 10Gbps stack ring. ...
4
votes
1answer
801 views

Should a Metropolitan Area Network (MAN) be setup with a router at each site?

Should a Metropolitan Area Network (MAN) be setup with a router at each site? Or, because the connections between sites are usually at layer two, should each site operate on one "master" switch which ...
2
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2answers
132 views

Re-tagging identically tagged VLANs

Given multiple networks all with the same VLAN tag, is VLAN re-tagging a wise thing to do in order to keep them separated on the same physical network? If so, how can I achieve this without getting ...
2
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1answer
105 views

network infrastructure configuration design in a openstack environment to enable instances to have a public IP as floating IP

Has anyone had an idea of what are the possible configuration design of a network infrastructure in an OpenStack environment to enable instances to have a public IP as a floating IP? An example below ...
2
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1answer
179 views

vlans - How to manage vlans in this scenario?

Note: This is not a project of an existing or future real network but only my laboratory in GNS3. Hey, I have a network project presented as in the diagram where: pfSense works as a firewall and ...
2
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1answer
199 views

Proper network design for office use

I have two 4G LTE router modems in my office which we want our clients connect to these modems to have access to the internet. I have a shared server which should connect to these both modems that ...
1
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1answer
232 views

Network design question for datacenter

We have new customer and they said their traffic requirement is ~40GB so i am planning to order some hardware and have some question or doubt in mind. I am planning to put Nexus 5000 for Core layer ...
1
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1answer
124 views

diff btw PTSN and DSL?

I have seen DSL compared to PTSN (public switched phone network). What are some of the major differences? Is there anything about this answer to a similar question [https://www.quora.com/What-is-...
1
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1answer
320 views

Hardware implementations of BFD

Is there any hardware implementation of BFD (Bidirectional Forwarding Detection)? In such case, what will be the average times for discovering a link failure instead of a path failure? Thanks
3
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4answers
2k views

L3 Core to Firewall question

I'm in need of some advice regarding the implementation of the network core layer of a network I need to design. I've found some similar questions asked (and answered) already, but none have really ...
0
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3answers
2k views

Calculate max transfer speed in LAN network

We have a LAN network between consumers and producers servers. Producers' output path has been mounted in consumers. There is a 10 Gig switch between producers and consumers and the link between each ...
5
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1answer
5k views

Do i need to configure VLANS on my router/firewall or just the switch?

I finally took time to map my entire shitty network to understand exactly what the guy before me did, and i must admit i'm a little bit surprised even if i'm not a network expert... Just take a look ...
3
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3answers
604 views

Need some advice with network topology

Hi Network Engineer experts out there, I need to refresh our network infrastructure since our network is not secure and not very structured. Right now, our network doesn't have VLANs, everything is ...
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2answers
133 views

L2 network design questions

Good afternoon everyone. I would like to know the textbook answer to a network I've been asked to assist with. I have an IT cupboard which serves the location as the MDF. I then have a variety of ...
1
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2answers
775 views

Preventing Load balancing in EIGRP

In a recent project, I have been told to consider four Hubs (two in HQ, and two in DR), where each branch will have EIGRP neighborships with all four, as part of a DMVPN based WAN. I have tested this ...
2
votes
1answer
515 views

Network design questions

I've been handed a project, and I'm familiar but not experienced enough to make a solid decision on this. I'm actually on the firewall side of things. We've lost our lead engineer and I'm wondering if ...
4
votes
2answers
407 views

Defining hierarchical BGP route-maps

I work for an MSP with a relatively small network. We're implementing a new set of Cisco ASR 1001-Xs on our edge and I'm trying to improve our BGP configuration. The routers are running: IOS XE ...
2
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2answers
567 views

F5 as a backbone router

We've been using the LTM and ZebOS for some time now. Time and again we've run into OSPF bugs, and an upgrade usually resolved them. ZebOS's BGP has been relatively stable in that regard. We're ...
-1
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2answers
454 views

Valid use cases for packet deduplication? [closed]

(On-the-fly) packet de-duplication is an advertised feature of some devices in which exact copies of packets can be allegedly filtered out at near line-speed. Ignoring the plausibility of this working ...
7
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2answers
477 views

What certifications are there for Fiber Optic termination and splicing?

As a knowledgeable person in computer networks I have always had an itch for learning how to create custom-length fiber optic cables. So, as a personal goal, I want to get trained and certified in ...
1
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1answer
46 views

Deploying a balanced, redundant network with 2 WAN networks

I've been tasked with upgrading our network and could use some input. We have 2 networks coming in currently to a single C7206VXR. We are now adding a second 7206 and wish to use it properly to better ...
1
vote
1answer
115 views

Guidelines for network design of bladecenter

I'm setting up a lab environment consisting of an IBM Bladecenter H (equipped with 4-NICs blade servers and 4 Cisco 3012) and 2 3750 as Aggregate switches. The blade servers will host VMWare and ...
1
vote
1answer
161 views

What is the advantage in using sub-domains in network naming conventions? [closed]

Although our devices are named things like: atln-0102-rt06-ge0 I often see naming conventions that use sub-domains like this: cr06-0102-ge0.atln.example.net Or even: ge0.cr06-0102.atln.example....
1
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2answers
377 views

Network distribution/core design implementation

Can the Cisco 3650 do the job of distribution/core layer? We have at least 250 devices that will be connected to the network. More info : The Cisco 3650 is needed for inter-vlan routing.
4
votes
1answer
580 views

Is there benefit to iBGP peering between CEs in a BGP dual-homed design?

Two companies wants to exchange some private prefixes (4K prefixes) using eBGP. Each company will have two border routers (with OSPF as IGP, and mutual redistribution & aggregate in eBGP) So, ...
1
vote
1answer
3k views

General best practice for VLANs and domains

I recently took a job at a school. This is only my second position as an IT professional. My only experience with corporate networks is in a large school district at another school. They used VLANs to ...
4
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3answers
204 views

Campus Area Network questions

Looking for design principles in regards to a Campus Area Network? We are a medium sized company with < 250 employees spread across 4 offices. We will soon be combining 2 offices into 1 larger ...
2
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4answers
271 views

Wireless AP placement

Attaching office studio layout with my proposed Ubiquiti AP placement. All 28 desks occupied with heavy WiFi users that like to complain;) Is the placement the best possible? Do you think that one ...
2
votes
1answer
218 views

Rate limit based on VLAN

My ISP company has some PoPs in remote areas, as shown in diagram. It is currently, it's getting all prefixes from Local IX and getting only a default route from the upstream Internet provider. ...
1
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1answer
27 views

Power Budget Based on Miniums?

I'm currently looking at 40Gbase-LR and am curious about the advertised power budget. Here are the specifications: Transmit max 2.30dBm Transmit min -7.00dBm Receive max 2.30dBm Receive ...
1
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0answers
30 views

Directly Connected Multihomed Hosts [closed]

I'm looking to directly connect a host (dual NICs) to a clustered appliance. The clustered appliance consists of two controllers each with their own NIC and VIP. In the event of a controller failure, ...