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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0answers
8 views
How do i calculate utilization of a link at a steady state [on hold]
I am trying to solve this homework question.Looks like lecturer didnt teach us about utilization so it confused me a little bit
Consider a direct link with capacity 12 Kbps (12000 bits per second) ...
0
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1answer
21 views
Leased 1GB fibre firewall with multiple IP LANS & tenants [on hold]
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 ...
0
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0answers
24 views
Which routers can monitor network traffic? [closed]
I have an Apple Time Capsule router. It is not able to monitor or analyze network traffic. I have many devices connecting to the router and need some way to know where any large amounts of data ...
0
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3answers
41 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 ...
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1answer
24 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 ...
5
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2answers
122 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 ...
0
votes
1answer
25 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
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0answers
61 views
Cisco ASA 5512 one download blocks all others until download finishes
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 ...
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0answers
32 views
Poor VPN Performance
Initial configuraion
<internet provider WAN> -- router/modem -- switch ------ clients(s)
The "router/modem" DHCP handles 192.168.1.X.
New configuration
<internet provider WAN> -- ...
0
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1answer
21 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
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0answers
101 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:
============...
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1answer
40 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 ...
4
votes
2answers
588 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 ...
1
vote
2answers
73 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 ...
2
votes
1answer
41 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
80 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
76 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 ...
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vote
2answers
74 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
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2answers
135 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 ...
0
votes
1answer
36 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
169 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
1answer
198 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 ...
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5answers
87 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
118 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, ...
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votes
1answer
1k 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 ...
4
votes
2answers
358 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
121 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
96 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 ...
0
votes
1answer
2k 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 ...
1
vote
3answers
1k 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
46 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 ...
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3answers
162 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
250 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
376 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 ...
1
vote
3answers
278 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
270 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 ...
0
votes
1answer
3k 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
699 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 ...
1
vote
2answers
2k views
Why traffic shape/police ingress traffic?
Pardon me for my ignorance. I have not tried QoS nor traffic shaping/policing before.
I have been pondering on whether can/why would we want to shape/police ingress traffic if you have no control ...
3
votes
1answer
193 views
Differences between Enterprise internet connections with the same nominal bandwidth
First of all, I am new to the forum and am unsure whether this is the right place to post my question. If this is not the right place, I would appreciate you letting me know the best website to ask ...
2
votes
2answers
499 views
What is Interface's Nominal Bitrate?
If you check show int tranceiver command on Nexus Switch 10Gbit Ethernet port, the output shows the nominal bitrate is 12000 MBits/sec instead of 10000 MBits/sec. As I know 12 bytes Interframe Gap + 8 ...
0
votes
1answer
179 views
Does Server Internet Bandwidth affect internet client download speeds
I'm studying computer networking and have a good understanding of tcp/ip how data travel across the internet and etc. But one thing I keep wondering is that does a Server's Internet Bandwidth affect ...
2
votes
1answer
274 views
TC & Qdisc Rules with 'Leaf' classes [closed]
I'm trying to determine a class which would be used as default for new IP's on my network, here's my current setup:
# Delete qdisc rule
tc qdisc del dev br-lan root
# Add qdisc rule
tc qdisc add dev ...
1
vote
1answer
225 views
Cisco IOS: Limiting internet bandwidth usage for specific VLAN
I would like to limit the usage of a 10 MBit internet connection for a specific internal VLAN to 2 MByte (on a Cisco router, IOS 15.3).
Is that possible in general?
How can the router make sure that ...
4
votes
1answer
610 views
limit bandwidth on a Cisco switch port,
Our company has a 3/.5 DSL connection. On this connection we have a VPN where the execs are able to access files on the network as well as VOIP. On this connection we also have our exchange email ...
0
votes
1answer
161 views
Limit bandwidth of a particular application [closed]
How to limit the connection (upload and download) speed of a particular application (e.g., a particular exe file) in accessing the internet?
Apparently, it is easy to allow or block completely using ...
2
votes
3answers
23k views
Bandwidth vs Throughput vs Data(bit) rate
I totally understand the difference between bandwidth and throughput. While bandwidth shows the maximum amount of data can be transmitted from a sender to a receiver, throughput is the actual amount ...
1
vote
1answer
163 views
Is bandwidth a sum of network speed each computer in sub network?
I'm not good at English But I really confused about this.
I used the word computer but it can be mobiles or any of devices which can have networking.
Let just the Internet bandwidth is 100Mbps, ...
2
votes
2answers
1k views
How does throttling of network traffic work for TCP/IP?
I have tried to find the answer on how network throttling works e.g. by ISP when they limit your access to say 100 Mbps. As far as I know TCP/IP itself does not have any mechanisms for that, so it is ...
0
votes
1answer
36 views
Finding the TCP throughput for intermediate switches along a transmission path
I am working on network simulation where my network should be as close from real-world conditions as possible. I am coding a function that calculates the latency and bandwidth of between switch A and ...
