IP SLA Request size (ARR data portion) UDP Jitter

[alexneishell]

Looking through the documentation for ip sla udp jitter, Cisco says these are the default values -

"By default, ten packet frames (N), each with a payload size of 10 bytes (S), are generated every 10 ms (T), and the operation is repeated every 60 seconds (F)."

however, looking at sh ip sla configuration on my router I get different values -

*******************************************************************

ip sla 1001

udp-jitter 2.2.2.2 20000 source-ip 1.1.1.1

ip sla schedule 1001 life 3000 start-time now

sh ip sla configuration

Entry number: 1001

Owner:

Tag:

Operation timeout (milliseconds): 5000

Type of operation to perform: udp-jitter

Target address/Source address: 1.1.1.1/2.2.2.2

Target port/Source port: 20000/0

Type Of Service parameter: 0x0

Request size (ARR data portion): 32

Packet Interval (milliseconds)/Number of packets: 20/10

**********************************************************************

This is confusing to me. According to this, the operation is sending 10 frames, at 32 bytes each with 20 ms between frames. Is this correct? Or are these default parameters for UDP Jitter? If so, this definitely does not match up with the data presented on cisco.com

thanks,

Alex

[AFROJ AHMAD]

Hi Alex ,

for UDP-jitter ,  Request Data size is :32( By Default) ,however you can change it .

NMS-6500(config-ip-sla-jitter)#request-data-size ?

  <16-1500>  Number of bytes in payload

for ICMP ECHO ,

Request Data size is :28  ( By Default)

Thanks-

Afroz

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[alexneishell]

Afroz - appreciate the reply. So my test operation would end up being

ten packet frames (N), each with a payload size of 32 bytes (S), are generated every 20 ms (T), and the operation is repeated every 60 seconds (F).

this is quite different than what the documentation says.

[AFROJ AHMAD]

Hi Alex,

Can you share the document .

Thanks-

Afroz

[alexneishell]

this is the link Afroz - http://www.cisco.com/en/US/docs/ios-xml/ios/ipsla/configuration/15-s/sla_udp_jitter.html

The wording I referenced is right above Table 1

[AFROJ AHMAD · Accepted solution]

Hi Alex,

Thanks for sharing the Doc ..

As per my understanding ,this is given just as an example or could be a documentaion Bug because if you look at the table 1 , you will see what is true.

I have highlighted it in the Image attached.

Thanks-

Afroz

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[alexneishell]

all good, and appreciate the responses.

[AFROJ AHMAD]

If this post helped you ,kindly mark it as resolved