Re: [OSPF] OSPFv2 option bit
"Santosh P K" <sanpk316@gmail.com> Wed, 03 October 2007 09:34 UTC
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Date: Wed, 03 Oct 2007 15:04:10 +0530
From: Santosh P K <sanpk316@gmail.com>
To: Anton Smirnov <asmirnov@cisco.com>
Subject: Re: [OSPF] OSPFv2 option bit
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Thanks a lot Smirnov :) On 10/3/07, Anton Smirnov <asmirnov@cisco.com> wrote: > > its reserved. Out of all these three which one shall i consider. > > Consider exactly for which purpose? Education, implementation, new > standard proposal? The answer depends. > > EA (External Attribute) never took off the ground, you can disregard it. > LLS is in Experimental state now, not Standards track, that's the reason > why it is not listed in IANA assignment. > > Thanks, > > Anton > > > > Santosh P K wrote: > > Hi All, > > I was going through the option bits of OSPFv2. I have couple of > > doubts on this please clarify. > > > > > > In RFC 2328 in A.2 it says > > +----------------------------------------------+ > > | * | * | DC | EA | N/P | MC | E | * | > > +----------------------------------------------+ > > That is > > Value Description > > ------ ---------------- > > 0x01 Reserved > > 0x02 E-bit > > 0x04 MC-bit > > 0x08 N/P-bit > > 0x10 EA > > 0x20 DC-bit > > 0x40 Reserved > > 0x80 Reserved > > > > > > > > In RFC 4813 OSPF Link-Local Signaling sec 2.1 it says > > +---+---+---+---+---+---+---+---+ > > | * | O | DC| L |N/P| MC| E | * | > > +---+---+---+---+---+---+---+-+-+ > > > > That is > > Value Description > > ------ ---------------- > > 0x01 Reserved > > 0x02 E-bit > > 0x04 MC-bit > > 0x08 N/P-bit > > 0x10 L-bit > > 0x20 DC-bit > > 0x40 O-bit > > 0x80 Reserved > > > > > > > > In IANA document (http://www.iana.org/assignments/ospfv2-parameters) > > last updated 2007-08-14 says > > > > > > Value Description Reference > > ------ ---------------- --------- > > 0x01 MT-bit [RFC4915] > > 0x02 E-bit [RFC2328] > > 0x04 MC-bit [RFC1584] > > 0x08 N/P-bit [RFC3101] > > 0x10 Reserved > > 0x20 DC-bit [RFC1793] > > 0x40 O-bit [RFC2370] > > 0x80 DN-bit [RFC4576] > > > > > > In all the three documents there is a conflict for bit 0x10, RFC 2328 > > uses it as EA bit , RFC 4813 uses it as L bit and IANA document says > > its reserved. Out of all these three which one shall i consider. > > > > > > Thanks and regards > > Santosh P K > > > > _______________________________________________ > > OSPF mailing list > > OSPF@ietf.org > > https://www1.ietf.org/mailman/listinfo/ospf > _______________________________________________ OSPF mailing list OSPF@ietf.org https://www1.ietf.org/mailman/listinfo/ospf
- [OSPF] OSPFv2 option bit Santosh P K
- Re: [OSPF] OSPFv2 option bit Anton Smirnov
- Re: [OSPF] OSPFv2 option bit Santosh P K
- Re: [OSPF] OSPFv2 option bit Santosh P K
- Re: [OSPF] OSPFv2 option bit Abhay Roy
- Re: [OSPF] OSPFv2 option bit Acee Lindem