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.
0
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0answers
9 views
how to calculate the total throughput? [closed]
suppose that we want to send some data from city A to city C.
What is the total throughput in terms of the bandwidths of the communication channels?
2
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1answer
33 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
268 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
65 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 ...
5
votes
4answers
1k 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
44 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
121 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
43 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
83 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 ...
2
votes
4answers
334 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
232 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
89 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 ...
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3answers
58 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
61 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
32 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
116 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
237 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
166 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
50 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
122 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
80 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
0answers
447 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
74 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
2k 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
152 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
44 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 ...
1
vote
1answer
419 views
How can I calculate the network throughput using ping responses?
I have the tcpdump data for the below mentioned command.This is to perform a test on the network to derive the bits per second.
Is it possible?
sudo ping6 fd9c:b4f9:3108:1045:213:5003:59:324e -c 10 -...
4
votes
2answers
176 views
increasing bandwidth between two Cisco switches?
2 Cisco 3750 switches are connected via port 22(Trunk). First switch consists of 3 VLANs(each vlan have 7 ports such as 1-7,8-14,15-21) and 2nd switch consists of 2 VLANs. what solution can i use to ...
2
votes
2answers
121 views
Finding the available capacity on switch interface in bytes or bits
Below is the output from my "show interface " command
PE1.18:01:44#sh interfaces Ethernet 3
Ethernet3 is up, line protocol is up (connected)
Hardware is Ethernet, address is 001c.7374.3d95
...
1
vote
2answers
242 views
What does minimizing maximum link utilization mean?
I was reading a networking material and it mentions that for optimizing a network, for congestion control and QoS, we need to minimizing maximum link utilization. I don't understand what does this ...
1
vote
1answer
75 views
Testing MCS Index Rates
my question might be a little too "newbie" style, but..
How can MCS index rates be set/restricted? For example, is it possible to set the MCS index to 5 at 20 Mhz bandwidth with 64-QAM Modulation and ...
2
votes
1answer
267 views
How does router do traffic control?
I googled a lot about this question, but I didn't find anything useful.
If, let's say, the router just drop the packets when the transfer rate exceed the limitation, then there should be TCP ...
1
vote
2answers
457 views
How do I prevent any one user from hogging all the bandwidth?
We upgraded from 20 Mbps to 50 Mbps DIA about two months ago. This required a router upgrade as well. Since then, anyone who starts a large HTTP download - e.g. an ISO, large spreadsheet or log, movie ...
2
votes
5answers
96 views
How 2 computers with different speeds communicate
This is one extremely basic and probably equally dumb question that I just couldn't ever find a definite answer to.
Suppose we have 2 computers one that can transmit data at say 10 bits per second (A)...
5
votes
3answers
133 views
Stupid question about bandwidth
An engineer and I were discussing that if our network has more network than actual needed would cause wasting bandwidth. For examples, if our company has only 200 devices are actually on a network, ...
0
votes
1answer
4k views
iperf: send specific volume?
I wanted to test some different test cases. I wanted to transmit 1MB, 10MB, 100MB, ..., 1GB, ... and measure bandwith with iperf.
In the manual stands that I can use a combination of -l and -n ...
5
votes
2answers
867 views
Speed benefits when switching from 1Gb copper LAN to Fiber Optic
We are trying calculate how will the network performance improve when we switch from 1Gb copper LAN to Fiber Optic.
We have 5-20 people simultaneously working on a Server via the 1Gb LAN.
There are ...
1
vote
1answer
155 views
What bits does iftop count when calculating and displaying the network bandwidth [closed]
I've googled and read, and googled and read. Everything I've found makes reference to it counting IP packets, but it obviously displays Bits/Byte and packets come all manner of size.
What bits does ...
1
vote
2answers
129 views
Network bandwidth management and priority
I'm trying to understand the mechanism by which bandwidth is consumed so that I can set the appropriate QoS and/or priority policies on the firewall. Here's the scenario:
Our setup is a Fortigate ...
2
votes
1answer
4k views
Iperf results on UDP Bandwidth
I am currently testing iperf with a view to automating some testing servers for our company.
To do this I am using an iperf server in the cloud which is well connected and is only 5 hops away from ...
2
votes
3answers
2k views
Why can insufficient bandwidth reduce latency?
In this article, it is stated that latency does not affect bandwidth, but insufficient bandwidth can reduce latency.
Can someone explain me the latter part of the statement? How would insufficient ...
1
vote
1answer
73 views
What is the meaning of the word 'band' in the following terms: broadband, baseband and bandwidth?
I am interested in the terminology of the following words: baseband, broadband and bandwidth applied in tellecomunications. What is the meaning of the words, how were they formed and what do they mean ...
1
vote
3answers
205 views
Does bandwidth limit apply only from my ISP to my network?
My network is subscribed to a 16 Mbps cap. So if I download a file from let's say Facebook, does the ISP download the file from Facebook at a different speed then sends it to my network at 16 Mbps? Or ...
1
vote
1answer
357 views
Setup a server for traffic monitoring using wireshark in bridge mode [closed]
i was able to get a hold of a server with 2 ethernet ports to start learning about traffic inspection using wireshark.
The server and software are setup. I would like to know how i can configure the ...
0
votes
1answer
570 views
Frame size, propagation delay and bandwidth relationship [closed]
I found in some forum this formula for calculating the frame size in function of the propagation delay and the bandwidth : frame size >= 2*(propagation delay)*bandwidth, I could not however find ...
4
votes
2answers
342 views
How does link aggregation work in reality?
I'm concerned that I'm misunderstanding how aggregators work in the scenario below:
I have a project where I need 40 Gbps links between switches. My plan was to have my three switches use all four of ...
1
vote
3answers
373 views
Max bandwidth of wireless access point with gigabit backhaul
I'm looking at setting up a network with full WiFi coverage.
Right now I'm still comparing access points to mesh.
I see the options for AC access points offer wireless bandwidth in excess of 1Gbps. ...
0
votes
3answers
463 views
How to detect the available bandwidth on a link without congesting it?
A lot of applications have been designed to help us detect the bandwidth on a link (Link throughput capacity) connecting two servers such as iperf. Unfortunately, these softwares congest the network ...
1
vote
1answer
6k views
Is it better to use channel 13 than channel 11 on 2.4GHz band
When I analyzed the wifi networks in my area, most of them are set on channel 1 and channel 6, so it would be most wise for me to set it on channel 11.
My router however, provides the option to set ...
2
votes
1answer
2k views
What are the capacity and speed of a cable?
In my work, I come across with a cable with TB/s capacity and speed in GB/s.
I did some search and found and article from Cisco trying to explain the two terminologies in terms of a water tap. The ...
