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.
185
questions
0
votes
2answers
23 views
what happend when inbound traffics over the limit of bandwidth? [closed]
Sorry for my English.
Let's say there is a chat server in AWS and it has bandwidth limit like 5Gbps. Someday, massive user comes and it spikes a lot of traffic in a second and finally it overs 5Gbps ...
0
votes
0answers
11 views
How can i estimate or calculate how much bandwidth I will need with a new ISP based my traffic history? [closed]
firstly I would like to point out that I am not very proficient with networking but I am dedicated to solving a particular problem I have.
I live in a house with several roommates, and to make a long ...
0
votes
1answer
32 views
Why are download and upload bandwidths different? [closed]
If I take any internet connection speed test (e.g. https://www.speedtest.net/) at home then a report is provided which shows different download and upload speeds. Why is this? How is downstream and ...
0
votes
1answer
24 views
Virtual Circuits in a narrow band network
I know that in a broadband network a virtual circuit is established like in an X.25, frame relay and ATM. Is there a virtual circuit established in narrow band network and if yes then how is it ...
0
votes
2answers
42 views
Reconciling multiple definitions of Bandwidth
I am confused about the meaning of the term 'Bandwidth' in a wireless transmission environment. The two most common definitions I could find are:
difference between the upper and lower frequencies in ...
0
votes
4answers
53 views
why we make each burst of data 2 times the product of bandwidth and delay?
Below is from my textbook:
if we need to send data in bursts and wait for the acknowledgment of each burst before sending the next one. To use the maximum capability of the link, we need to make the ...
2
votes
3answers
96 views
How do you calculate required uplink on a Switch? [duplicate]
Lets just say i have an access switch with 8 1G port downlink, and all downlink ports are connected to the users. I want to connect said switch to an aggregation switch.
How do I determine the ...
1
vote
1answer
55 views
TCP Bandwidth and delay guarantees
I was wondering if TCP can provide bandwidth and delay guarantees? Or does it have to implemented on the application layer?
0
votes
2answers
24 views
How could the line rate of T1 be 1.544 Mbps?
T1 signal is the output of a 24-to-1 digital multiplexer whose inputs are 64 kbps each (plus one framing bit).
But a multiplexer is simply an electronic device that selects between several inputs and ...
-1
votes
1answer
30 views
What would the bandwidth be while transferring from a machine with a 2.5 Gbps NIC to a machine with a 10 Gbps NIC?
I have two machines connected via a managed network switch capable of supporting 10 Gbps bandwidth.
What would the bandwidth be if I transfer data from machine 1 with a 2.5 Gbps network card to ...
2
votes
1answer
1k views
Worst-case efficiency of PPP escaping mechanism
Will transferring over PPP data stream containing only reserved bytes 0x7E, 0xFF, 0x03 reduce bandwidth by 50% because of escaping?
Then it seems to be very stupid if not say moronic. Such poor ...
1
vote
1answer
47 views
Link utilization
I have a topology below (two switches S1 and S2), each interface has two metrics (ifinutilization and ifoututilization).
%ifinutilization = ( (ifinoctets * 8) * 100 ) / ifspeed
%ifoututilization =...
1
vote
2answers
186 views
Tx and Rx network metrics
Rx means Receive, and Tx means Transmit. I need to know how can i calculate link utilization (Bandwidth utilization) from these metrics ?, do i need to average them or getting maximum ?
0
votes
1answer
40 views
Monitor individual device traffic on Cisco RV042
I am able to monitor Total Traffic consumption on the Cisco RV042 router using SNMP and PRTG.
I want to be able to monitor traffic used by each device on my net
9
votes
1answer
576 views
What does bandwidth (digital) really mean?
Recently I came across a new kind of NIC capable of 400Gbps (It kind of blew my mind).
Does it mean it's electric circuitry is capable of serializing/deserializing (SERDES) 400G bits per second of ...
1
vote
1answer
25 views
Streaming Online Video from Home: Bandwidth and Provider Restrictions? [closed]
This is merely meant as a thought experiment, because I reckon it's generally a bad idea with regards to scalability, security, etc., BUT:
Imagine a person wanted to start streaming videos from his ...
1
vote
4answers
132 views
does fiber optic transmit data as fast as light?
I dont know where to ask this question. So i think its best suited for networking community.
As fiber optic transmit data using light. So we are getting/sending data at the speed of light ??
I did ...
0
votes
1answer
29 views
Bandwidth limit between CPE and Provider Equipment
I have 4 different WAN links for redundancy one of them is 15mbps MPLS and the other ones are 30mbps Internet , 50 mbps Internet and 10 mbps MPLS , the way that it is set up is that we have load ...
1
vote
0answers
43 views
why we need to make the size of our burst 2 times the product of bandwidth and delay? [duplicate]
A textbook which says:
The bandwidth-delay product defines the number of bits that can fill the link. This measurement is important if we need to send data in bursts and wait for the acknowledgment ...
5
votes
1answer
136 views
Getting lot of unwanted broadcasts on my network
I am pretty new in Networking (noob), while I was monitoring my network using Wireshark, and I found that there is a lot of broadcasts happening all over the network, broadcast on Local network ...
0
votes
0answers
18 views
Bmon - Find average bandwidth usage of a tool
I am using bmon network analyser and I am wondering if the way to calculate the average bandwidth usage of a scanning tool like Nmap, is to measure the total number of RX and TX bytes and divide them ...
1
vote
1answer
52 views
How to score links in a network represented as graph?
I am working on an academic research about networks. I have proposed my model a a graph that nodes are users with commodity hardware connected to each other via internet as graph links. I know this is ...
1
vote
2answers
1k views
How to measure max bandwidth with Wireshark?
I'm trying to measure the max bandwidth usage of my LAN with Wireshark. I´ve done several packet captures but I don't know how to obtain the max bandwidth usage.
Any Idea?
Thank you in advance
2
votes
2answers
516 views
Fiber to copper conversion, what are the odds?
My ISP says they bring optical fiber to their junction box outside and they bring the copper cable inside from the junction box. And they're promising a symmetrical bandwidth with a speed upto 50MBps. ...
2
votes
2answers
566 views
Transferring data speed of Fast Ethernet
I am wondering that between 2 hosts in LAN, when i send one file which weights 1Mb versus 1 file weights 0.3Mb from the first host to the second host using TCP/IP protocol, would the latter come first?...
2
votes
1answer
115 views
RSVP bandwidth value configuration in Juniper MX
Can someone please explain is it a good practice to change RSVP bandwidth value of an interface?
We have two bundle links between R1 and R2 namely ae13 and ae22 . Both R1 and R2 are Juniper MX ...
6
votes
1answer
548 views
Bandwidth limit Cisco 3400 ME problem
I want to limit bandwidth (speed) of interface of Cisco 3400 ME switch.
I did these:
policy-map parent
class class-default
shape average 64000
And in gi0/2 interface I apply it: service-policy ...
1
vote
1answer
125 views
Bandwidth & shape average combined
Here is a class-map that our provider has configured :
class ce_ef_output
police 2600000
class ce_af1_output
police 5360000
class class-default
bandwidth 592
class class-default
shape ...
7
votes
4answers
2k views
Can throughput exceed the bandwidth of a network
I took an introductory course to networking this semester and I was wondering:
looking at things at the layer 4 level using TCP can the throughput on the network exceed its bandwidth? According to the ...
3
votes
1answer
399 views
Can I limit bandwidth for certain IP address, subnet or VLAN on Cisco 881?
I have a router with several workstations running on the switched ports. I need to limit their WAN bandwidth. I tried to use rate-limit on Vlan1, but it looks like it had no effect. What is the ...
2
votes
1answer
330 views
What is max speed of WiFi Direct (P2P)?
I'm looking for information on what kind of speeds theoretically can devices connected through WiFI Direct achieve, assuming all devices support WiFi ac?
0
votes
1answer
65 views
Estimating bandwidth requirements and productivity gain from traffic data
My small office has a 30Mbit/s internet connection, on which two or three people work. We could get twice the bandwidth at a substantial cost.
I imagine a bandwidth upgrade would slightly improve ...
3
votes
2answers
270 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 ...
3
votes
4answers
597 views
What is the difference between Ethernet types, considering bandwidth?
Different types of Ethernet (standard Ethernet, Fast Ethernet, Gigabit Ethernet) have different speed of data transfer (10 Mbit, 100 Mbit, 1 Gbit). Why is that?
On the physical layer, the speed of ...
2
votes
1answer
522 views
QOS police vs bandwidth - is this configuration wrong?
I understand bandwidth in QOS is use to guarantee a minimum bandwidth
I understand police in QOS is to set a limit to the maximum bandwidth.
class test_out
police **1608000** 50000 100000 conform-...
1
vote
2answers
105 views
Can large ISPs really offer 1Gb “dedicated” service to every home and business?
Hopefully this is on topic for this site.
While researching synchronous carrier service, so called EDIA or Ethernet Dedicated Internet Access, to a rural location in New Hampshire, USA, I came across ...
1
vote
3answers
99 views
Do throughput rates include corrupt packets? Is throughput = packet loss + good packets or is throughput = good packets?
Normally network devices/software show some kind of current throughput. For example my home router shows the throughput for each connected device in its web interface. Or every web browser when ...
3
votes
1answer
127 views
Is Cisco SG300-10PP & QoS appropriate to share bandwidth?
We're going to let some empty space in our office building soon.
The potential client needs an internet connection for their systems (including VoIP).For ourselves we have a resilient ethernet setup, ...
0
votes
1answer
55 views
Leased 1GB fibre firewall with multiple IP LANS & tenants [closed]
I’m in desperate need of some unbiased advice and suggestions.
Everyone I ask seems to want to sell me a £2-5,000 firewall appliance and £1500+ per year of support/licencing.
I have a 1gb leased ...
2
votes
3answers
367 views
How can 1000BaseT transmit on Rx & receive on Tx pins?
How can 1000-BaseT (Gigabit ethernet twisted copper pairs) technology transmit over the Rx pins & receive over the Tx pins?
It's baseband technology (hence the name), right? Discrete digital ...
2
votes
1answer
891 views
How to check the Juniper Switch's port bandwidth?
I use the CoS method limited the EX3300's switch port bandwidth to 200m.
But I have a question, how to check whether it works?
Is there the Juniper Switch EX3300's switch port have a bandwidth ...
6
votes
2answers
494 views
Why is internet speed called Bandwidth?
Why do we refer to our internet speeds as "bandwidth" with units of measurement like "10 Mbps"?
As I understand it, Bandwidth is, as the name implies, the width of the frequency band, typically ...
1
vote
1answer
58 views
How get more data rate : Change the number of bits, the bandwidth or the packet duration
I found definition say that, the rate of packet is define by
R=N/BD [b/Hz/s]
where N is the number of bits , B is the bandwidth and D is the packet duration.
So suppose that R'=N/BD.
If I would ...
1
vote
0answers
179 views
Cisco ASA 5512 one download blocks all others until download finishes [closed]
My company has a 50 Mbps Down/Up connection. I just migrated from a PIX 515E to an ASA 5512. Previously, one user could download a large file from the internet and block all other users from accessing ...
0
votes
1answer
208 views
different between Bandpass chanel and Baseband channel? [closed]
What is the different between Band-pass Chanel and Base-band channel?
can we convert analog data to analog signal using base-band signal?
1
vote
1answer
1k views
Nokia/Alcatel Lucent SAR-8 7705 port utilization
Typically I use the following command to show port utilization percentage:
monitor port 1/1/8 rate interval 5
As an example, this would result in the following output every few seconds:
============...
2
votes
1answer
135 views
Definition of bandwidth capacity for an internet connection
First, I want to test the data rate of a fibre-optic internet connection, but I understand that results are affected by the circumstances of the test, like number of hops between the CPE and the other ...
5
votes
2answers
5k views
Cisco Router (ISR4221) Throughput - Why so slow?
I'm looking for a new router for a new branch of hour company. I got experience with cisco L2 & L3 Switches but not that much with Routers.
I was looking at the ISR4000 series, specifically the ...
2
votes
2answers
243 views
Multi Chassis Ether Channel Best Practice
in our topology we have our Data Server(Multi Virtual Servers) and Backup Server exist in two different buildings and the current connection between them as below:
Connection explanation:
*1st ...
3
votes
1answer
47 views
LAN side 1Gb link showing WAN 4Mbps throughput in SNMP
I am a-bit confused here.
I have a FW connected to L2 switch then to an ISP router.
My ISP link has a 4Mb capped on the egress.
[My FW] <-1Gb link-> [p0 L2 Switch p1] <-1Gb link-> [ISP ...
