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14 votes
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Can throughput exceed the bandwidth of a network

The bandwidth is the number of bits that can be sent on a link in one second. The throughput is the amount of data that is sent, and that will need to subtract the protocol overhead from the bandwidth,...
Ron Maupin's user avatar
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12 votes
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Bandwidth vs Throughput vs Data(bit) rate

Some of these terms are used differently by different people, but below is what is generally accepted. Bandwidth is the number of bits per second that a link can send or receive, including all flows. ...
Ron Maupin's user avatar
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11 votes

Bandwidth vs Throughput vs Data(bit) rate

Daily I see peoples even specialists in communication do mistakes about the three mentioned terms: Bandwidth: The unit of it is Hz, so it is mathematically is: High_Used_Frequency - Low_Used_Frequency....
Salar Kheder's user avatar
8 votes
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Cisco Router (ISR4221) Throughput - Why so slow?

That's by product design. ISR 4k come with a platform shaper (upgradeable to ~2x the value by license upgrade with the "PERF" license). Cisco say that the limits of the platform shapers can be fully ...
Marc 'netztier' Luethi's user avatar
7 votes
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Does distance of one user from WiFi AP have negative impact on other connected users?

Does distance of one user from WiFi AP have negative impact on other connected users? Yes, this is true at least in the traditional 802.11 network. Why? By the nature of 802.11 wireless, a channel (...
YLearn's user avatar
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5 votes
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How can I calculate the network throughput using ping responses?

ICMP has got an overhead of 8 bytes, IPv6 of 40 bytes, (assumed, untagged) Ethernet of 38 bytes. With a payload length of 1388 bytes, the total per packet is 11,792 bits on the wire. Ping doesn't ...
Zac67's user avatar
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5 votes

Do packets take the same amount of time when they are within the MTU?

I'm not completely sure what you mean. A link will have a bandwidth. Let's assume 10 Mbps ethernet. Ethernet has some overhead: a seven octet synchronization, a one octet start-of-frame delimiter, a ...
Ron Maupin's user avatar
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5 votes
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What's the term for throughput including all Ethernet overhead?

I simply call this link speed or L1 throughput; with Ethernet, this is the nominal speed. You can directly calculate the maximum, effective L4 throughput for TCP over IPv4 over standard Ethernet (...
Zac67's user avatar
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4 votes

Can I increase throughput and decrease network latency by installing multiple NICs?

This is an interesting but complicated topic and like most things engineering the answer is: It depends! In this case the lack of detail adds ambiguity (I'm not allowed to comment asking for ...
MerlinTheMagic's user avatar
4 votes
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Does the direction of a throughput bottleneck matter?

If a network has a throughput bottleneck, does it matter whether the slow link comes before or after? No it doesn't, Only matters when destination is before or after that bottleneck link. What ...
Anirudh Malhotra's user avatar
4 votes

How to calculate throughput in Kpps?

The bandwidth test will not help you properly determine your firewall needs, as it is only testing how much available bandwidth you have. Graphing either through RouterOS or through a third party ...
Brian Winning Jr.'s user avatar
4 votes
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Throughput up to 1.2Gbps?

As you can see on the image the device has multiple interfaces. The 1.2Gbps throughput is the total traffic it can process on all ports, not per port.
Teun Vink's user avatar
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4 votes
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Cisco routers THROUGHPUT - MTU and packet size

When calculating the possible throughput, which pacet size should I take? Short answer: search the internet for "IMIX" or "Internet Mix" The basic issue is this: network devices process and ...
mere3ortal's user avatar
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4 votes
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What is the relationship between throughput and latency

i.e. 1000 packets * 400ms latency (i.e. 400ms RTT - I understand latency to usually refer to RTT) = at least 400 seconds to deliver the HTTP payload. Well that would only be true if every single ...
Marc 'netztier' Luethi's user avatar
3 votes

Theoretical: Bottleneck in a switch stacking environment

With a 10 Gbit/s uplink, 10 Gbit/s stack interlinks and only 100 Mbit/s edge ports the uplink bottleneck is rather theoretical. 48 FE ports on each switch can transport an aggregate, peak edge-to-...
Zac67's user avatar
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3 votes

Cisco routers THROUGHPUT - MTU and packet size

The MTU is dictated by the link. For example, ethernet has an MTU of 1500, while frame relay on a serial interface has a much larger MTU. Other factors can reduce the MTU. For example, a tunnel will ...
Ron Maupin's user avatar
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3 votes

Lower throughput with fixed TCP window size?

That's not a shock. These day we automatically tune the amount of RAM assigned to TCP buffers (aka the maximum TCP window size), and by specifying the window size you are turning off the automated ...
vk5tu's user avatar
  • 1,171
3 votes

Lower throughput with fixed TCP window size?

As Marco mentioned, Receive window sizes (rwin) will increase and decrease automatically during a TCP session depending on how lossy the connection ends up being. It is therefore possible that ...
OzNetNerd's user avatar
  • 2,337
3 votes

Lower throughput with fixed TCP window size?

Receive window sizes (rwin) will increase and decrease automatically during a TCP session depending on how lossy the connection ends up being. It is therefore possible that when you omit the -w flag ...
Mark Riddell's user avatar
3 votes
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Cisco ASR1001 licence throughput measurement

Yes those dropped packets would factor into available throughput, and this is because ACLs are processed by the ESP [Embedded Services Processor] which measures bandwidth. All those packets are being ...
Brian Winning Jr.'s user avatar
3 votes

Delays and throughput

Is transmission rate same as Bandwidth? In essence yes, with some small adjustments for the difference between the clocking of the media ("bandwidth") and the actual rate at which packets are ...
vk5tu's user avatar
  • 1,171
3 votes

How to determine the throughput of the TCP connection?

Yes, this is completely normal. And you use the minimum value of the calculations that you have done above. Think about how long it would take to move a box of paper down the hall - now imagine that ...
Fred Phillips's user avatar
3 votes
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How troubleshoot poor ipsec connection?

Normally you would first check whether all packets are being encapsulated and decapsulated OK by viewing ipsec counters on the tunnel endpoints. However if you want to look at packets, first you need ...
marctxk's user avatar
  • 1,181
3 votes
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Throughput in a 2 link network

I think the reason is : Having determined the throughput, we can now approximate the time it takes... The last packet is received in about a ms, and this doesn't change much the calculated ...
JFL's user avatar
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3 votes
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IPoIB with Netem (Latency emulation) Poor performance

The most common mistake made when using netem to emulate network delay is to not increase the packet limit. You didn't. Therefore you tail drop a lot of packets and tcp cannot build a queue long ...
Dave Taht's user avatar
  • 106
3 votes

Does distance of one user from WiFi AP have negative impact on other connected users?

An individual station will receive traffic at whatever speed it can, independent of any other stations. In infrastructure mode (with an AP), stations communicate with the AP, not each other, so the ...
Ricky's user avatar
  • 32.3k
3 votes

Does distance of one user from WiFi AP have negative impact on other connected users?

Well it depends... See, wireless interference is unfortunately inevitable, because wireless LAN communications are based on radio frequency signals that require a clear and unobstructed transmission ...
Boschko's user avatar
  • 171
3 votes

Can throughput exceed the bandwidth of a network

TCP also implements a receive window that's sent in the ACK for each received packet, so if you try to overload the host on the other end, it'll set the receive window to a smaller value as the TCP ...
Stuggi's user avatar
  • 2,269
3 votes
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Collect UDP packets lost during iPerf test

Depending on your Cacti version, we collect errors and discarded packets without any problems on Version 1.1.38. Here's how we do it. Select the tab Console, then extend Management and click devices....
Cow's user avatar
  • 1,732
3 votes

How could the line rate of T1 be 1.544 Mbps?

A T1 is 8000 frames per second. Each frame is 193 bits: a frame bit, followed by 24 8bit channels. 8000 * (1 + 8 * 24) gives a line rate of 1,544,000. Remember, the T1 was designed for voice ...
Ricky's user avatar
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