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New Member

Bytes Received/Packet received in CPI report

Hey guys,

I am working on a  client session report in Prime infrastructure and dont understand tthis report coloums

Header 1Header 2Header 3Header 4Header 5
Bytes receivedBytes sendPacket receivedPacket sendData retries
1892332393113790

Can any one tell me what is the difference between Byte and a Packet, on ethernet world one packet is equal to 1500 bytes (MTU). My 2nd question how do they calculate Data retries ? Data retries in bytes or packets ?

what results can we get from this coloums.

Thanks

1 ACCEPTED SOLUTION

Accepted Solutions
VIP Purple

Re: Bytes Received/Packet received in CPI report

In wireless 3 different types of wireless frame types.

1. Control Frames (eg RTS,CTS, ACK, etc)

2. Data Frames (frame which carry user data)

3. Management Frames (Beacons, Association request/response, etc)

Frame size varies depend on type of the frame. Like 1500 MTU for wired, 2304 will be equivalent MTU size for wireless.

So in your client session report, it include everything of these differnet type of frames. To work it out relation with bytes to packets, you need to know how many frames & size of each frame.

Data re-tries are how many times same frame is trying to send (due to collisions in this half duplex mode), it is not in bytes or packets, it is just a count

HTH

Rasika

**** Pls rate all useful responses ****

4 REPLIES
Bronze

Bytes Received/Packet received in CPI report

In most computer systems, a byte is a unit of data that is eight binary digits long. A byte is the unit most computers use to represent a character such as a letter, number, or typographic symbol (for example, "g", "5", or "?"). A byte can also hold a string of bits that need to be used in some larger unit for application purposes (for example, the stream of bits that constitute a visual image for a program that displays images or the string of bits that constitutes the machine code of a computer program).

Packet switching is a communications paradigm in which packets (units of information carriage) are routed between nodes over data links shared with other traffic. In each network node, packets are queued or buffered, resulting in variable delay. This contrasts with the other principal paradigm, circuit switching, which sets up limited number of constant bit rate and constant delay connections between the nodes for their exclusive use for the duration of the communication. When a unit of data, beginning at the application layer (top layer) is transmitted to lower layers, headers and trailers are appended to it. Once the unit of data reaches the IP layer and source and destination IP addresses are added to it, it then is known as an IP datagram. The unit of data, feeling a little bloated from having all this extra baggage is then sent to the link layer where source and destination MAC addresses are perpended to it. Now it is called a frame - and more accurately an Ethernet frame (if the physical layer is Ethernet). To be precise, the unit of data passed between the IP layer and the network interface card is really a packet of data. Thus, a packet can be an entire IP datagram or perhaps a fragment of an IP datagram.

In computer networking, the maximum transmission unit (MTU) of a communications protocol of a layer is the size (in bytes) of the largest protocol data unit that the layer can pass onwards. MTU parameters usually appear in association with a communications interface (NIC, serial port, etc.). Standards (Ethernet, for example) can fix the size of an MTU; or systems (such as point-to-point serial links) may decide MTU at connect time.

New Member

Re: Bytes Received/Packet received in CPI report

Thanks Aqeel

VIP Purple

Re: Bytes Received/Packet received in CPI report

In wireless 3 different types of wireless frame types.

1. Control Frames (eg RTS,CTS, ACK, etc)

2. Data Frames (frame which carry user data)

3. Management Frames (Beacons, Association request/response, etc)

Frame size varies depend on type of the frame. Like 1500 MTU for wired, 2304 will be equivalent MTU size for wireless.

So in your client session report, it include everything of these differnet type of frames. To work it out relation with bytes to packets, you need to know how many frames & size of each frame.

Data re-tries are how many times same frame is trying to send (due to collisions in this half duplex mode), it is not in bytes or packets, it is just a count

HTH

Rasika

**** Pls rate all useful responses ****

New Member

Re: Bytes Received/Packet received in CPI report

Hey Rashika,

thaks for explanation but still I am unable to find any report in Cisco Prime that tells me how many frames or size of each frames. Is there any way on controller side to find out frame size or Avg. frame size ?

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