Am 23.06.2020 09:28, schrieb Marek Greško:
Hi
if you need clampmss then it is highly probable there is a PMTU
discovery problem. The clampmss does not work for UDP.
Is there a way to check if I have this problem?
I probably counted the size incorrectly. So you are able to ping with
size 1464 and not with 1466. How about trying same ping sizes from the
internet towards your site? I mean trying to ping from sites with
higher MTU than yours without lower MTU links in the path.
lucabert@ns:~$ ping -4 -M do -s 1465 bpi.d.lucabert.com
PING bpi.d.lucabert.com (93.241.91.232) 1465(1493) bytes of data.
From 62.156.246.57 (62.156.246.57) icmp_seq=1 Frag needed and DF set
(mtu = 1492)
ping: local error: Message too long, mtu=1492
ping: local error: Message too long, mtu=1492
ping: local error: Message too long, mtu=1492
^C
--- bpi.d.lucabert.com ping statistics ---
4 packets transmitted, 0 received, +4 errors, 100% packet loss, time
3965ms
pipe 2
With paket size of 1464 it works...
You know MTU is a size of l2 frame, so using ipv6 you are able to use
higher payload sizes because of ip header size.
OK, thanks!
Luca Bertoncello
(lucab...@lucabert.de)
--
_____________________________________________________________________
-- Bandwidth and Colocation Provided by http://www.api-digital.com --
Check out the new Asterisk community forum at: https://community.asterisk.org/
New to Asterisk? Start here:
https://wiki.asterisk.org/wiki/display/AST/Getting+Started
asterisk-users mailing list
To UNSUBSCRIBE or update options visit:
http://lists.digium.com/mailman/listinfo/asterisk-users
