Cisco Support Community
cancel
Showing results for 
Search instead for 
Did you mean: 
Announcements

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. And see here for current known issues.

New Member

Ping with larger packet size using -l

Hi,

I have a query regarding the ping with larger packet size using -l in Windows based systems.When i ping my remote site devices using normal ping the response is ok .The pipe between the two sites is 1G .Same is ok for a packet size of 10000 bytes but when multiple sessions are opened to the same device using -l with 10000 bytes packet starts dropping what can i assume about it although the link utilization is hardly 5mbps .

1 REPLY
Cisco Employee

Ping with larger packet size using -l

Hi Farooq,

When you send packets larger than the path mtu, these packets need to be fragmented. The fragmented packets then need to be reassembled by the destination host. The fact that ping packets are being dropped might have to do with the destination host not being able to properly reassemble all the packets. If you are trying to test the capacity of the circuit, I would suggest better tools such as iperf.

Regards

Harold Ritter
Sr. Technical Leader
CCIE 4168 (R&S, SP)
harold@cisco.com
México móvil: +52 1 55 8312 4915
Cisco México 
Paseo de la Reforma 222 Piso 19
Cuauhtémoc, Juárez
Ciudad de México, 06600
México
176
Views
0
Helpful
1
Replies
CreatePlease login to create content