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From: subashab@codeaurora.org
To: Aleksander Morgado <aleksander@aleksander.es>
Cc: "Bjørn Mork" <bjorn@mork.no>, "Daniele Palmas" <dnlplm@gmail.com>,
	"Network Development" <netdev@vger.kernel.org>,
	stranche@codeaurora.org
Subject: Re: RMNET QMAP data aggregation with size greater than 16384
Date: Thu, 05 Aug 2021 16:57:00 -0600	[thread overview]
Message-ID: <77b850933d9af8ddbc21f5908ca0764d@codeaurora.org> (raw)
In-Reply-To: <CAAP7ucK7EeBPJHt9XFp7bd5cGXtH5w2VGgh3yD7OA9SYd5JkJw@mail.gmail.com>

> I may be mistaken then in how this should be setup when using rmnet.
> For the qmi_wwan case using add_mux/del_mux (Daniele correct me if
> wrong!), we do need to configure the MTU of the master interface to be
> equal to the aggregation data size reported via QMI WDA before
> creating any mux link; see
> http://paldan.altervista.org/linux-qmap-qmi_wwan-multiple-pdn-setup/
> 
> I ended up doing the same here for the rmnet case; but if it's not
> needed I can definitely change that. I do recall that I originally had
> left the master MTU untouched in the rmnet case and users had issues,
> and increasing it to the aggregation size solved that; I assume that's
> because the MTU should have been increased to accommodate the extra
> MAP header as you said. How much more size does it need on top of the
> 1500 bytes?

You need to use an additional 4 bytes for MAPv1 and 8 bytes for 
MAPv4/v5.

--
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora 
Forum,
a Linux Foundation Collaborative Project

  parent reply	other threads:[~2021-08-05 22:57 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-31 22:45 Aleksander Morgado
2021-08-05 19:10 ` subashab
2021-08-05 20:32   ` Aleksander Morgado
     [not found]     ` <CAGRyCJHYkH4_FvTzk7BFwjMN=iOTN_Y2=4ueY=s3rJMQO9j7uw@mail.gmail.com>
2021-08-05 21:01       ` Aleksander Morgado
2021-08-05 21:12         ` Daniele Palmas
2021-08-05 22:57     ` subashab [this message]
2021-08-06 14:08       ` Aleksander Morgado
2021-08-06 18:42         ` subashab
2021-08-06 19:58           ` Bjørn Mork
2021-08-06 20:22             ` Aleksander Morgado
2021-08-06 22:30               ` subashab
2021-08-07 10:55                 ` Bjørn Mork
2021-08-09 21:40                   ` subashab
2021-08-12 12:02                     ` Daniele Palmas
2021-08-13  6:21                       ` subashab
2021-08-13  6:25                         ` Bjørn Mork
2021-09-03 13:55                           ` Daniele Palmas
2021-09-08  6:21                             ` subashab

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