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Questions tagged [architecture]

For questions about network architecture, where it is a framework for the specification of a network's physical components and their functionality and configuration.

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1answer
36 views

Is there a recommended way of making Network Diagrams? [on hold]

I am used to draw network diagram without following any particular template, norm or convention. Is there such a thing ? Something like a framework to represent physical and logical diagrams or both ...
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1answer
18 views

How bandwidth is divided in a network? [closed]

so given a certain bandwidth how is this bandwidth for a specific link divided when different links sprout out of a single link? Is it equally divided or it there a better optimal way? Also, this ...
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1answer
23 views

Is Hub the DMZ in a Spoke-Hub architecture?

In a spoke hub architecture, is the DMZ another spoke (I.e. peered to the hub), a stand-alone vent, or the hub itself (for example as a subnet)? This question is mostly for azure implementation.
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1answer
45 views

Advice to correct and improve a network diagram

I need to build a "secure"-network diagram with Visio for my school. I already build it but I want to get some advise about it to tell me if I made some big mistake or if I can improve it. My diagram ...
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4answers
651 views

Abstract language to describe network deployments?

Is there any more or less standard/spec that is, vendor neutral, for network configuration language? Say, a VPC with networks and virtual machines would become an XML or JSON file. Something like, &...
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2answers
165 views

Spine and Leaf architecture with LACP

In a spine and leaf architecture with Link Aggregation between spine and leaves (active-active) like this: Do we have the same active-atcive link aggregation between the leaf and the server? Is the ...
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2answers
167 views

How to connect high-availability routers to high-availability firewalls

I have two Juniper routers (a SRX340 and a SRX320), each with a leased line, on the same IP range. They are designed to be connected together on specific network ports so that the SRX320 takes over if ...
4
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1answer
381 views

Architecture for management network in large data center?

I've read about data center network architectures - Fat-tree, Clos (or spine-leaf), DCell, BCube... None of these make any specific mention of the management network, which I expect would be out-of-...
2
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1answer
103 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 ...
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1answer
271 views

VXLAN ingress replication limitations?

I've been trying to search for data on the scaling figures of the various network ASICs with regards to the maximum number of remote VTEPs they can handle when doing ingress-replication (a.k.a. Head-...
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1answer
454 views

What problem does Frame Relay or ATM solve that Ethernet does not?

Frame Relay is a technology that exists from 1988 (more or less). Ethernet is older (mid 70's). Why we classify as a WAN technology Frame Relay if Ethernet can do the same (and even better!)? As far ...
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2answers
576 views

How to build a ISP (Internet Service provider)? What are the core components required? [closed]

I am trying to understand the cost of building an ISP. The core components required, licences, backbone and any leases. I have searched a lot on the internet and i am not able to figure out the basic ...
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2answers
559 views

OSI and TCP/IP: which is the relation? [duplicate]

In the "network" literature there are always explanations of this two reference models: OSI and TCP/IP. The TCP/IP conceptual model is indeed a "fact" in terms of implementation. Anyone can find the ...
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2answers
699 views

What is the difference between “Network Model” and “Network Architecture”?

I have a great confusion about the terms "Model" and "Architecture". Is the TCP/IP is a model or architecture?. If it is model then what is architecture? What does the both terms refers to.
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3answers
6k views

What is a headend device?

I see the term headend thrown around a lot at work? What sort of device in what role gets considered a headend?
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2answers
620 views

Searching in TCAM vs RAM

I understand the higher level of TCAM and how it differs from CAM and also RAM. My question is from the architectural point of view. I've read that TCAM search is really faster than RAM due to the ...
2
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1answer
269 views

Distinguishing different devices on wifi/radio frequency connections

I am wondering how does the devices on a wireless connection recognize each other between all other devices, for example A wifi signal from an access point at 2.4GHz wave on channel 2 would ...
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1answer
50 views

load balancer in high availibility

I want to apply the following architecture, where i have two app servers in order to ensure high availibility. Do i need to use two dedicated servers for load balancer or is it possible to use a ...
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1answer
1k views

connecting two routers, each connected to a different ISP

I have two routers, one wireless connected to ISP1 with optical cable, and the second one connected to ISP2. The second router is cisco 860 series, i will configure ACL lists and zone based firewall ...
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1answer
64 views

Satellite network hardware

I'm having some problems with the selection of components for the construction of a satellite network. For communication with satellite, I want to use DS-CDM 760 modem from Comtech. But there is a ...
2
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1answer
4k views

Nested private networks (private network within private network) [closed]

I'm preparing a network setup for a building with five apartments and some common infrastructure, and being no network professional I'm stuck with the question of topology and overall setup that would ...
3
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1answer
48 views

Fiber Trenching Design (L1)

We are in the process of building a new campus which will be 10 single-story buildings on 20 acres. The buildings are laid out in a U shape. The bottom of the U will host all IT services (servers, DC, ...
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1answer
37 views

Managment Network: provide wireless access to 3 campus [closed]

During an interview I was asked to provide a basic outline of a project managment for a network position. The objective was to provide wireless access to 3 campus (let's say each of 1000 people) that ...
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2answers
302 views

Small business multiple gateways with different internet providers

At a small business with under 10 PCs they have 3 general purpose wifi routers with internet from different ISPs. They want to have a single network so that if they have to switch the gateway the ...
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2answers
554 views

what is a Network Architecture [closed]

what is the exact difference between network architecture and network design? can I call the whole company network design as a network architecture.? why network architecture needed?
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1answer
349 views

OSI model, clarification about the role of SAP

I'm studying the OSI architecture model and I have doubts about the role of the SAP (Service Access Point). From what I'm getting it's an interface between the (N+1)-PDU and the (N)-SDU but does it ...
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4answers
1k views

What Exactly is SDN?

Is SDN a buzzword or is it a protocol, standard, or recommendation? What differentiates SDN from VMware NSX, for example?
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1answer
106 views

Is wireless network sutabile for VoIP services? [closed]

We are moving our HQ to a new building, I am responsible for designing the network and the data center, I was thinking to make it all wireless, but what about the voice services, can we get a good ...
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1answer
2k views

Router vs. switch between ISP and firewall

I have always used a "dumb" (unmanaged) switch as the entry point and distribution to my LAN network. ISP's copper goes into the switch and about six or 8 other connections come out of the switch to ...
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1answer
3k views

Routing with a firewall vs L3 switches

Referring to the following Cisco SAFE design : http://www.cisco.com/c/en/us/td/docs/solutions/Enterprise/Small_Enterprise_Design_Profile/SEDP/chap5.html#wp1058019 Why use an L3 switch in front of a ...
5
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2answers
1k views

Routing protocol for Large scale hub and spoke VPN

I'm looking at implementing a linux-based VPN setup with approx 1200 remote sites connecting into two redundant data centers/DCs. Each remote site has 4 networks, and each DC has ~10. The VPN itself ...
4
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1answer
1k views

Will an ERICSSON T720G GPON ONU & a Linux box work as an upstream PPPoE BRAS in our demo setup?

I am a volunteer teacher trying to get my students fired up by learning Broadband. Accordingly I am building a small scale DSL/PPPoE Broadband network that they can touch, deconstruct and put back ...
8
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4answers
42k views

What is the advantage of an “area” in OSPF configuration?

As we know, during OSPF configuration we use the area. Each area has its different number, while there is only one area (area 0) which creates communications between all other attached areas. I am ...
7
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5answers
3k views

Redundant IP link aggregation for failover operation without route failure detection

I am looking for a technology to achieve TCP connection fault tolerance with the help of two links between hosts and without time delays for route failure detection. Something like this: ...
8
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6answers
419 views

What is the name of these broadband street cabinet connectors, and are they secure?

Can anyone help enlighten me, do these connectors have a formal name/standard? These are found in a street side ISP broadband cabinet for residential customers in the UK. Would I be correct in ...
9
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2answers
4k views

What is backpressure in the context of routers?

There are several references to backpressure as regards to the internal bandwidth and switching fabrics of routers and switches. What exactly does backpressure mean, and what are the real world ...
8
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3answers
763 views

Distributed L3 Switching

Traditional data center architectures centralize the routing. All inter-vlan traffic must transit the core, even when hosts share a network access point. It would be more efficient to perform inter-...
10
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3answers
1k views

OSPF link cost design

What kind of processes and/or tools do you use to design OSPF cost on links in your environments?