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11.08.2007 at 01:36AM PST, ID: 22946870
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6.4

Ping large buffer size and ipfrag_time

Asked by el33t in TCP/IP, Linux Networking

Tags: , ,

Hi,

I ping my office Linux  router public IP from my home Windows XP SP2 machine:

ping <linux_public_ip> -l 10000 -t

and i get a reply from my router with that big buffer size.

Well packets getting fragmented to 1500 (MTU) as i can see in "iptraf" running on linux router.

If i do same on google.com obviously i get timed out.

TO achieve the same I digg alot and find this tcp parameter

/proc/sys/net/ipv4/ipfrag_time = 30

I make it 0 (secs)

and ping again and voila i get timed out and only get reply if i pass buffer size 1470...thats good.

But are there any side effects of this?

Thanks!Start Free Trial
[+][-]11.08.2007 at 01:38AM PST, ID: 20239970

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[+][-]11.08.2007 at 01:58AM PST, ID: 20240024

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[+][-]11.08.2007 at 04:17AM PST, ID: 20240481

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[+][-]11.08.2007 at 05:00AM PST, ID: 20240746

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[+][-]11.08.2007 at 05:29AM PST, ID: 20240921

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About this solution

Zones: TCP/IP, Linux Networking
Tags: ping, size, buffer
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Solution Provided By: KeremE
Participating Experts: 2
Solution Grade: B
 
 
[+][-]11.08.2007 at 05:34AM PST, ID: 20240953

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[+][-]11.08.2007 at 05:49AM PST, ID: 20241080

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[+][-]11.08.2007 at 05:51AM PST, ID: 20241089

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[+][-]11.08.2007 at 07:52AM PST, ID: 20242184

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