From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mails.dpdk.org (mails.dpdk.org [217.70.189.124]) by inbox.dpdk.org (Postfix) with ESMTP id 92A4E4617B; Mon, 3 Feb 2025 04:05:55 +0100 (CET) Received: from mails.dpdk.org (localhost [127.0.0.1]) by mails.dpdk.org (Postfix) with ESMTP id 822524060F; Mon, 3 Feb 2025 04:05:55 +0100 (CET) Received: from inbox.dpdk.org (inbox.dpdk.org [95.142.172.178]) by mails.dpdk.org (Postfix) with ESMTP id 11ED3400EF for ; Mon, 3 Feb 2025 04:05:55 +0100 (CET) Received: by inbox.dpdk.org (Postfix, from userid 33) id 0B61F4617C; Mon, 3 Feb 2025 04:05:55 +0100 (CET) From: bugzilla@dpdk.org To: dev@dpdk.org Subject: [DPDK/ethdev Bug 1638] Differences in how different Intel NICs handle maximum packet length for jumbo frame Date: Mon, 03 Feb 2025 03:05:55 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: new X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: DPDK X-Bugzilla-Component: ethdev X-Bugzilla-Version: unspecified X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: nandinipersad361@gmail.com X-Bugzilla-Status: UNCONFIRMED X-Bugzilla-Resolution: X-Bugzilla-Priority: Normal X-Bugzilla-Assigned-To: dev@dpdk.org X-Bugzilla-Target-Milestone: --- X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: bug_id short_desc product version rep_platform op_sys bug_status bug_severity priority component assigned_to reporter target_milestone Message-ID: Content-Type: multipart/alternative; boundary=17385519540.DB20A29Fb.2122258 Content-Transfer-Encoding: 7bit X-Bugzilla-URL: http://bugs.dpdk.org/ Auto-Submitted: auto-generated X-Auto-Response-Suppress: All MIME-Version: 1.0 X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org --17385519540.DB20A29Fb.2122258 Date: Mon, 3 Feb 2025 04:05:54 +0100 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: http://bugs.dpdk.org/ Auto-Submitted: auto-generated X-Auto-Response-Suppress: All https://bugs.dpdk.org/show_bug.cgi?id=3D1638 Bug ID: 1638 Summary: Differences in how different Intel NICs handle maximum packet length for jumbo frame Product: DPDK Version: unspecified Hardware: All OS: All Status: UNCONFIRMED Severity: normal Priority: Normal Component: ethdev Assignee: dev@dpdk.org Reporter: nandinipersad361@gmail.com Target Milestone: --- 10 Gigabit Ethernet devices from Intel do not take VLAN tags into account w= hen calculating packet size while Gigabit Ethernet devices do so for jumbo fram= es. Implication: When receiving packets with VLAN tags, the actual maximum size of useful payload that Intel Gigabit Ethernet devices are able to receive is 4 bytes = (or 8 bytes in the case of packets with extended VLAN tags) less than that of I= ntel 10 Gigabit Ethernet devices. Resolution/Workaround: Increase the configured maximum packet size when using Intel Gigabit Ethern= et devices. Affected Environment/Platform: All. Driver/Module: Poll Mode Driver (PMD). --=20 You are receiving this mail because: You are the assignee for the bug.= --17385519540.DB20A29Fb.2122258 Date: Mon, 3 Feb 2025 04:05:54 +0100 MIME-Version: 1.0 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: http://bugs.dpdk.org/ Auto-Submitted: auto-generated X-Auto-Response-Suppress: All
Bug ID 1638
Summary Differences in how different Intel NICs handle maximum packet= length for jumbo frame
Product DPDK
Version unspecified
Hardware All
OS All
Status UNCONFIRMED
Severity normal
Priority Normal
Component ethdev
Assignee dev@dpdk.org
Reporter nandinipersad361@gmail.com
Target Milestone --- 

10 Gigabit Ethernet devices from I=
ntel do not take VLAN tags into account when
calculating packet size while Gigabit Ethernet devices do so for jumbo fram=
es.

Implication:
When receiving packets with VLAN tags, the actual maximum size of useful
payload that Intel Gigabit Ethernet devices are able to receive is 4 bytes =
(or
8 bytes in the case of packets with extended VLAN tags) less than that of I=
ntel
10 Gigabit Ethernet devices.

Resolution/Workaround:
Increase the configured maximum packet size when using Intel Gigabit Ethern=
et
devices.

Affected Environment/Platform:
All.

Driver/Module:
Poll Mode Driver (PMD).

You are receiving this mail because:
  • You are the assignee for the bug.
=20=20=20=20=20=20=20=20=20=20
= --17385519540.DB20A29Fb.2122258--