Hi,
Arne Lie wrote:
Jan,
Hm, my observations are that if there are bit errors introduced in the PPP frame, the "ifconfig ppp0" will count such packets in the "error" tab. From this I anticipated that the PPP stack included CRC checking of its payload. By CRC-16 I mean 2 byte CRC, CRC-32 4 byte. Our customer wants 4 byte CRC. From RFC2823 I see both are mentioned. The question is, how does one select either? Perhaps it is not configurable via pppd?
RFC2823 is about PPP SDL on SONET/SDH ; AFAIK the pppd code does not
support this *at all* so I am not surprised that I did not find any
references to CRCs in the headers...
So the short answer to your question would be: no, PPP v2.4.5 does not
support CRC-16 or CRC-32.
HH,
JJK / Jan Just Keijser
-----Original Message-----
From: Jan Just Keijser [mailto:jan.just.keijser@xxxxxxxxx]
Sent: 20. april 2010 16:16
To: Arne Lie
Cc: linux-ppp@xxxxxxxxxxxxxxx
Subject: Re: CRC-16 or CRC-32
Arne Lie wrote:
Hi,
A very basic question: does PPP v2.4.5 support CRC-16 or CRC-32 (or
it may be configurable, in that case, how)?
what exactly do you mean by CRC-16 or CRC-32? ( I know what CRC means )
BTW, the word 'crc' does not appear anywhere in the ppp source code.
--
To unsubscribe from this list: send the line "unsubscribe linux-ppp" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
