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grant123 Veteran
Joined: 23 Mar 2005 Posts: 1080
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Posted: Sun Aug 25, 2013 10:15 am Post subject: Determine ideal MTU without ping? |
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I'm currently connecting to the internet by tethering to my cell phone. I'd like to determine my ideal MTU but from what I understand this is done via pings and I get 100% packet loss when pinging so my ISP must be dropping them. Is there anything else I can do to figure this out? |
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PaulBredbury Watchman
Joined: 14 Jul 2005 Posts: 7310
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Posted: Sun Aug 25, 2013 2:06 pm Post subject: |
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You didn't mention who you're trying to ping. Try e.g.:
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Hu Moderator
Joined: 06 Mar 2007 Posts: 21490
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Posted: Sun Aug 25, 2013 2:51 pm Post subject: |
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With the right configuration, PMTUD should handle this for you. Have you disabled PMTUD? |
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grant123 Veteran
Joined: 23 Mar 2005 Posts: 1080
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Posted: Sun Aug 25, 2013 3:08 pm Post subject: |
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PaulBredbury, I lose all of those pings unfortunately.
Hu, how is PMTUD enabled/disabled on Gentoo? |
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massimo Veteran
Joined: 22 Jun 2003 Posts: 1226
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Posted: Wed Aug 28, 2013 5:53 am Post subject: |
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grant123 wrote: | PaulBredbury, I lose all of those pings unfortunately.
Hu, how is PMTUD enabled/disabled on Gentoo? |
disable pmtu discovery
Code: | sysctl -w ip_no_pmtu_disc=1 |
enable pmtu discovery
Code: | sysctl -w ip_no_pmtu_disc=0 |
_________________ Hello 911? How are you? |
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grant123 Veteran
Joined: 23 Mar 2005 Posts: 1080
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Posted: Sun Sep 01, 2013 7:40 am Post subject: |
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Thank you! |
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