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Date: Tue, 14 Jan 2014 15:45:35 +0400
From: Dennis Yusupoff <dyr@smartspb.net>
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To: freebsd-net@freebsd.org
Subject: Re: Set UDP packet size in ng_netflow/ng_ksocket?
References: <52D51153.6020607@smartspb.net> <20140114103323.GS8472@FreeBSD.org>
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I didn't find any open Netfow v5 specification, so why wouldn't add
ability to set MTU size for v5 also as it already has done for v9?
Anyway most people exporting netflow to open-source utuilties, such as
flow-tools, that, AFAIK, doesn't care about exact datagram size.


14.01.2014 14:33, Gleb Smirnoff пишет:
> The ng_ksocket is irrelevant here. This is ng_netflow, who decides on
> datagram size. AFAIR, the size of Netflow datagram is dictated by the Cisco
> Netflow, and full sized datagram fits into 1500 MTU. Probably it was designed
> to be used on 1500 MTU sized networks.
>
> You can hack sources and redefine NETFLOW_V1_MAX_RECORDS or NETFLOW_V5_MAX_RECORDS
> so that datagram would fit your link.
>

-- 
Best regards,
Dennis Yusupoff,
network engineer of
Smart-Telecom ISP
Russia, Saint-Petersburg