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? Best regards Arne Lie SINTEF ICT, Dept. of Communication Systems NO-7465 Trondheim, NORWAY Dir. phone +47 73 59 27 03 - mobile +47 450 20 040 e-mail: arne.lie@xxxxxxxxx > -----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. > > cheers, > > JJK / Jan Just Keijser -- 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
