Solved

ping -l

Posted on 2011-02-15
6
1,080 Views
Last Modified: 2012-05-11
whats the maximum value you can use for a ping -l

is this the same as the mtu value thats configured on the switch?

Thanks
0
Comment
Question by:jly999
  • 4
6 Comments
 
LVL 25

Accepted Solution

by:
RobMobility earned 300 total points
ID: 34896679
Hi,

I don't believe there is a limit in Windows - if the MTU size is exceeded, then the packet will be fragmented. You can prevent this by adding -f switch.

In other OS, there is a limit.

More information here:

http://msdn.microsoft.com/en-us/library/cc737478(v=ws.10).aspx

Regards,


RobMobility.
0
 

Author Comment

by:jly999
ID: 34896751
so if i'm seeing timeouts with  >ping -l 64000 could that indicate a network problem ?
pings below  24000 show no issue

I did think  1500-byte packet was the largest allowed..?
0
 
LVL 25

Expert Comment

by:RobMobility
ID: 34896783
Hi,

If you send a packet larger than the MTU, it's fragmented. If you include the -f switch, then packets are not fragmented.

Regards,


RobMobility.
0
Comprehensive Backup Solutions for Microsoft

Acronis protects the complete Microsoft technology stack: Windows Server, Windows PC, laptop and Surface data; Microsoft business applications; Microsoft Hyper-V; Azure VMs; Microsoft Windows Server 2016; Microsoft Exchange 2016 and SQL Server 2016.

 
LVL 25

Expert Comment

by:RobMobility
ID: 34896797
Hi,

It looks like 65535 including the ICMP header is the largest size permnittable for ping.

Regards,


RobMobility.
0
 
LVL 25

Expert Comment

by:RobMobility
ID: 34896815
Hi,

Thats IPv4 packet size maximum, although it is often regarded as the Ping Of Death as a buffer overrun can occur with such large pings.

Regards,


RobMobility.
0
 
LVL 24

Assisted Solution

by:rfc1180
rfc1180 earned 200 total points
ID: 34899538
64000 Bytes requires 512Kbps worth of bandwidth.
At 1500 bytes for the MTU, that would be 42 packets a second  (not including overhead at layer 2 and 3) assuming fragmentation on the intermdiary nodes (Routers). So, if you do not have the resources (Bandwidth, CPU, PPS, etc.) to handle that, you will get packet loss.

Billy
0

Featured Post

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Today, still in the boom of Apple, PC's and products, nearly 50% of the computer users use Windows as graphical operating systems. If you are among those users who love windows, but are grappling to keep the system's hard drive optimized, then you s…
Data center, now-a-days, is referred as the home of all the advanced technologies. In-fact, most of the businesses are now establishing their entire organizational structure around the IT capabilities.
Internet Business Fax to Email Made Easy - With  eFax Corporate (http://www.enterprise.efax.com), you'll receive a dedicated online fax number, which is used the same way as a typical analog fax number. You'll receive secure faxes in your email, f…
Get a first impression of how PRTG looks and learn how it works.   This video is a short introduction to PRTG, as an initial overview or as a quick start for new PRTG users.

867 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

19 Experts available now in Live!

Get 1:1 Help Now