Questions tagged [bandwidth]

For questions about bandwidth where bandwidth is the amount of data that can be carried from one point to another in a given time period (usually a second). This tag is suitable when your question is about network congestion, speed, throughput and of course low bandwidth problems.

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2
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1answer
722 views

can average througput be greater than bandwidth?

Is it possible for the throughput to be greater than the bandwidth of the cable ?Is it normal to have an average throughput of 10.401 Mbits/s on a cable of 10Mbits/s ?
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1answer
3k views

How to limit the internet bandwidth to specific department in my company, using a Cisco Router?

I have this case: In my Company we have 2 Internet Access in production R1-A router and R2-B router they are both in separate networks, R2-B have the highest priority which it use to Call Center. ...
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1answer
3k views

How exactly does “bandwidth” in the Cisco IOS affect network performance?

While troubleshooting a problem that a client reported I came across the IOS interface setting bandwidth. For whatever reason their interface was set to bandwidth 20. I understand that it doesn't ...
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3answers
5k views

QoS or more bandwidth?

Being in SP field I sometimes hear folks say "we do not need QoS, just let's make sure we have enough bandwidth". This has always been bothering me, because currently we have a network without any QoS ...
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3answers
2k views

How test dedicated bandwidth - 10 Mbps

Level 3 has recently installed a dedicated internet conection (10 Mbps 1:1) in my company. When I use speedtest.net or any other test website, speed values are vey poor (1.56 for download, and 2.39 ...
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1answer
77 views

What is the bandwidth (in Gbps) of a today Tv telecommunication satellite? [closed]

I'm impressed on the amount of channels of a television satellite. In Europe, for example, Hotbird 13 supply 1000+ television channel, Astra 19.2 and Astra 28 others 2000 or 3000 channels, some in HD....
2
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3answers
2k views

Is the bandwidth of cable constrained by its length?

If a certain cable has a bandwidth of 10 mbps, that means in can contain 10 megabytes of data inside it at any given second. However, does this assume some standard length? The analogy I've been ...
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1answer
378 views

Networking, dedicating bandwidth to specific networks

I need to configure a cisco router where 5mb will be split between 2 separate networks one for voice 1mb and one for data 4mb with voice being the main priority. The only way i can think of doing it ...
4
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1answer
1k views

Rate limiting specific IP adresses on Cisco 2960S and 2960X series

We are looking into rate limiting some specific IP addresses down to 5mbit for various bandwidth reasons. Is is possible to rate limit ingress and egress traffic for specific IP addressees on the ...
4
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2answers
960 views

Equal WAN bandwidth for all LAN devices using Sonicwall NSA 2400/2600

I have a Sonicwall NSA 2400 (soon to replace with NSA 2600). The LAN has a widely varying number of users/devices. Some days there are 10 people onsite, some days 75-100. I want to be able to ...
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4answers
2k views

MikroTik bandwidth management [closed]

I have a 16mbps/1mbps speed for Internet access. When a user downloads a file at full speed or torrent, other users can't browse because connections time out. Is it possible to share bandwidth ...
2
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1answer
472 views

Do physical wire properties impact the choice between T568A & T568B?

Trying figure out the key differences between T568A and T568B wiring, if any exist. I found claims in a thread that T568A has advantages over T568B due to the fact that each twisted-pair in a cat5/...
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2answers
5k views

Limit bandwidth in cisco router with policy-map doesn't work

I have a problem with my scenario in limiting bandwidth of ubuntu PC in GNS3 with class-map and policy-map. this is my topology in GNS3: The R1 is a cisco 3725 router with c3725-adventerprisek9-mz....
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1answer
3k views

Limit Internal LAN Traffic and Internet Traffic - Managed Switch?

I have a small business network (192.168.10.x/24) with a pfSense firewall (about 20 hosts: mix of Windows, Macs and Linux machines and printers...). The ISP modem from the WWW connects to the firewall ...
2
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2answers
564 views

Is there an upper or lower bound of bandwidth given a particular RSS value?

When my computer is in the same place, the RSS (received signal strength) value it receives from my router tends to stay constant at around -60dBM. However, my bandwidth tends to fluctuate a lot over ...
6
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2answers
5k views

Limit egress traffic 2960G

This is to support a user who has the requirement of simulating specific speeds for download/upload. We have configured a limit using service-policy that as successfully limiting upload speed (...
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2answers
2k views

Cisco 3750-X Stack Bandwidth

I am currently managing a large datacenter spine-and-leaf topology. On our leafs, we use stacked 3750-X switches. I want to know how much bandwidth is currently going across the stack links (...
5
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4answers
11k views

Cisco Router Limiting Bandwidth

I have a Cisco 2621XM connected straight to my ISP modem. I have a computer on the second interface of the router. Topology: ISP -> Modem -> Cisco Router -> Computer When I run a ...
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2answers
968 views

Why are downloads slower if the server is far away?

I know that because of the distance the data has to travel, and light only being so fast, the connection will take longer, and the first bit should arrive slower than downloading from a server which ...
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1answer
175 views

Dynamic bandwith sharing in SonicWall

In Sonicwall, we "split" T1 line into two lines: Internal LAN (so we can get on the internet) and Client line (so clients can work with server that we host). We simply dedicated 25% of bandwidth to ...
2
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1answer
524 views

Where Does TCP overhead factor in when it comes to Wifi speeds?

Is it taken into account by the standards before they give the theoretical maximums per stream, per generation? How could the loss in bandwidth due to TCP overhead be calculated?
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1answer
160 views

bandwidth vs latency - question on stuart cheshire paper

I am trying to get my grips around bandwidth and latency. I have read Stuart Cheshire's essay, however, there are a couple of paragraphs that I cannot understand. Paraphrasing: Assume we are to ...
5
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2answers
214 views

Extended ACL bandwidth consumption

While preparing for CCNA exam, I found this recommendation in a book: Place extended ACLs as close as possible to the source of the packets that will be filtered. Filtering close to the source of ...
5
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1answer
348 views

Mechanisn for performing bandwidth accounting on Cisco routers

We're about to purchase a pair of Cisco 7201s for our edge routers, and some Juniper EX4200s for core. And I'm looking for implement bandwidth accounting for our hosted servers on this hardware (most ...
10
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3answers
18k views

What is the relationship between the bandwith on a wire and the frequency?

I am trying to learn networking (currently Link - Physical Layer); this is self-study. I am very confused about one particular thing: Suppose I want to send a data on the wire something like this: ...
2
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1answer
867 views

Bandwidth Speeds

I have a Cisco Catalyst 6500 with the 720 Supe card. I would like to get the upload and download utilization of a specific port. I would like it from SNMP, I have looked for the correct MIB but no ...
6
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4answers
49k views

How can I view bandwidth use by ip/host on a Cisco router?

My company has a 100mbps Internet connection and we have recently experienced extreme slowness when using the Internet (our provider's speedtest page indicated .25 Mbps download speed). When we ...
2
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1answer
5k views

QoS bandwith calculation

Please explain: I have two routers with QoS on them.. Both WAN-facing interfaces have a bandwidth command with the same value (100000) but the priority queue (also the other reservations) calculates ...
11
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1answer
7k views

Traffic generation from Cisco IOS device to prove WAN circuit

In essence I want to know if there is any way that we can use extended ping or any other command variants to prove to the customer that that the circuit is able to achieve the minimum CIR. The CE ...
6
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1answer
774 views

Bandwidth calculation for protocol over different Data/Physical links

I am trying to calculate what the bandwidth utilisation for a specific protocol would be over different links. As a start, I have the utilisation for this protocol over Ethernet. E.g 70kbytes/sec, and ...
9
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2answers
2k views

Switch-Assisted Load Balancing w/ Fault Tolerance

While studying for Cisco and Microsoft certifications I read a lot about NIC Teaming, Etherchannels and similar stuff. I know you can do static teaming in MS Windows Server or creating a port-...
22
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4answers
9k views

Does physical distance affect download speed?

I just had an argument with a colleague of mine and thought I'd just reach out to the experts on this. Here's the scenario. We were using a website that measures your connection's speed. We tested ...
7
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2answers
294 views

What determines the degree of parallelism that can occur over a network?

I'm trying to learn more about how a network (both LAN and Internet) handles traffic, and one part of this is the question of parallelism. In the documentation for Speedtest.net, in describing how ...
10
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3answers
4k views

Why does my UDP Broadcast wireless communication is capped at 1MBs?

I am trying to implement Network Coding over a meshed network. Therefore I need to send packets to several destinations, this is way I am using Broadcast packets. But I can not understand why this is ...
8
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2answers
507 views

Determining optimal bandwidth needs for the office

We're currently using the Cisco 1921/K9 router along with SG300 L3 switch and other L2 switches in the office environment. We're hooked up to a 10M fiber line for internet but not sure if we need that ...
4
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7answers
980 views

Media Transfer rates…is using laser over fiber the fastest?

My simple understanding is that one of the advantages of going to fibre (light) is that you transfer things at a lot higher rate than a standard cable using the light frequency. Adjusting the light ...

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