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... ..00 = explicit congestion notification: not ECN-capable transport (0)

asked 2018-09-19 14:10:11 +0000

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Hello i'm newer in Wireshark and packeges information.

But i always see this messenger on much packeges:

"... ..00 = explicit congestion notification: not ECN-capable transport (0)"

is it mean my network congestion or only my network don work with ECN ?


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answered 2018-09-19 16:32:02 +0000

Hi, your second guess is right - not ECN-capable transport means ECN is not used in this connection.

If it were used you'd see 10 โ€“ ECN Capable Transport, ECT(0) or 01 โ€“ ECN Capable Transport, ECT(1). In case of network congestion AND if ECN is used you'd see 11 โ€“ Congestion Encountered, CE.

Value of 00 is quite common in general purpose networks outside of datacenters.

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thanks you very much

washington gravatar imagewashington ( 2018-09-20 02:14:14 +0000 )edit

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Asked: 2018-09-19 14:10:11 +0000

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Last updated: Sep 20 '18