Re: [IPFIX] [IANA #476592] clarify IPFIX interface information elements
Nevil Brownlee <n.brownlee@auckland.ac.nz> Fri, 29 July 2011 15:02 UTC
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Subject: Re: [IPFIX] [IANA #476592] clarify IPFIX interface information elements
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Hi Amanda: WG consensus (on the IPFIX list) is that we should NOT make this change. Instead, it looks as though we should make a clarifying statement about it, but we haven't yet reached agreement on where that statement should appear. Cheers, Nevil On 27/07/11 09:40, Amanda Baber via RT wrote: > Hi Nevil, > > Are you OK with these changes? > > thanks, > Amanda > > On Tue Jul 26 12:42:44 2011, paitken@cisco.com wrote: >> Dear IANA, >> >> Subject to the WG chair / expert reviewer's approval, and per the WG >> email attached below, I propose the following four clarifications be >> made to the IPFIX Information Elements registry at >> http://www.iana.org/assignments/ipfix/ipfix.xml >> >> Note that the changes are highlighted in red for convenience, though >> this colour is not intended to be used in the registry. >> >> Thanks, >> P. >> >> >> #10 ingressInterface >> >> OLD >> The index of the IP interface where packets of this Flow >> are being received. The value matches the value of managed >> object 'ifIndex' as defined in RFC 2863. >> Note that ifIndex values are not assigned statically to an >> interface and that the interfaces may be renumbered every >> time the device's management system is re-initialized, as >> specified in RFC 2863. >> NEW >> The index of the logical or virtual IP interface where >> packets of this Flow >> are being received. The value matches the value of managed >> object 'ifIndex' as defined in RFC 2863. >> Note that ifIndex values are not assigned statically to an >> interface and that the interfaces may be renumbered every >> time the device's management system is re-initialized, as >> specified in RFC 2863. >> END >> >> >> #14 egressInterface >> >> OLD >> The index of the IP interface where packets of >> this Flow are being sent. The value matches the value of >> managed object 'ifIndex' as defined in RFC 2863. >> Note that ifIndex values are not assigned statically to an >> interface and that the interfaces may be renumbered every >> time the device's management system is re-initialized, as >> specified in RFC 2863. >> NEW >> The index of the logical or virtual IP interface where >> packets of >> this Flow are being sent. The value matches the value of >> managed object 'ifIndex' as defined in RFC 2863. >> Note that ifIndex values are not assigned statically to an >> interface and that the interfaces may be renumbered every >> time the device's management system is re-initialized, as >> specified in RFC 2863. >> END >> >> >> #252 ingressPhysicalInterface >> >> OLD >> The index of a networking device's physical interface >> (example, a >> switch port) where packets of this flow are being received. >> NEW >> The index of a networking device's physical interface >> (example, a >> switch port) where packets of this flow are being received. >> The value matches the value of managed object 'ifIndex' as >> defined in RFC 2863. >> Note that ifIndex values are not assigned statically to an >> interface and that the interfaces may be renumbered every >> time the device's management system is re-initialized, as >> specified in RFC 2863. >> END >> >> >> #253 egressPhysicalInterface >> >> OLD >> The index of a networking device's physical interface >> (example, a >> switch port) where packets of this flow are being sent. >> NEW >> The index of a networking device's physical interface >> (example, a >> switch port) where packets of this flow are being sent. >> The value matches the value of managed object 'ifIndex' as >> defined in RFC 2863. >> Note that ifIndex values are not assigned statically to an >> interface and that the interfaces may be renumbered every >> time the device's management system is re-initialized, as >> specified in RFC 2863. >> END >> >> >> -------- Original Message -------- >> Subject: IPFIX export: SNMP versus physical Interface >> Date: Tue, 26 Jul 2011 13:30:17 +0100 >> From: Paul Aitken<paitken@cisco.com> >> To: IETF IPFIX Working Group<ipfix@ietf.org> >> >> >> >> Dear IPFIXers, >> >> I noticed that the definitions of fields 10 and 14, and fields 252 and >> 253 are confusingly similar. See below. >> >> Cisco uses fields 10 and 14 to export the logical or virtual interface >> (eg. SVI, tunnel), while fields 252 and 253 export the actual physical >> interface. >> >> For example, if we have an SVI configured on a VLAN, the SNMP index of >> the SVI would be exported using fields 10 and 14, while the SNMP index >> of the physical port in that VLAN would be exported with fields 252 > and 253. >> >> So I propose to update fields 10 and 11 to say, "the index of the >> logical or virtual interface ...", to contrast with 252 and 253 which >> say, "The index of a networking device's physical interface ...". >> >> And I propose to add the following text (copied from 10 and 14) to 252 >> and 253, to clarify that these are also SNMP ifIndex values: >> >> The value matches the value of >> managed object 'ifIndex' as defined in RFC 2863. >> Note that ifIndex values are not assigned statically to an >> interface and that the interfaces may be renumbered every >> time the device's management system is re-initialized, as >> specified in RFC 2863. >> >> >> The existing definitions are below for reference. >> >> Please shout now if you disagree. >> >> Thanks, >> P. >> >> >> 10 ingressInterface unsigned32 identifier current >> >> The index of the IP interface where packets of this Flow >> are being received. The value matches the value of managed >> object 'ifIndex' as defined in RFC 2863. >> Note that ifIndex values are not assigned statically to an >> interface and that the interfaces may be renumbered every >> time the device's management system is re-initialized, as >> specified in RFC 2863. >> >> See [RFC2863] for the definition of the >> ifIndex object. >> >> >> 14 egressInterface unsigned32 identifier current >> >> The index of the IP interface where packets of >> this Flow are being sent. The value matches the value of >> managed object 'ifIndex' as defined in RFC 2863. >> Note that ifIndex values are not assigned statically to an >> interface and that the interfaces may be renumbered every >> time the device's management system is re-initialized, as >> specified in RFC 2863. >> >> See [RFC2863] for the definition of the >> ifIndex object. >> >> >> 252 ingressPhysicalInterface unsigned32 identifier current >> >> The index of a networking device's physical interface >> (example, a >> switch port) where packets of this flow are being received. >> >> See [RFC2863] for the definition of the ifIndex object. >> >> >> 253 egressPhysicalInterface unsigned32 identifier current >> >> The index of a networking device's physical interface >> (example, a >> switch port) where packets of this flow are being sent. >> >> See [RFC2863] for the definition of the ifIndex object. >> > > > -- --------------------------------------------------------------------- Nevil Brownlee Computer Science Department | ITS Phone: +64 9 373 7599 x88941 The University of Auckland FAX: +64 9 373 7453 Private Bag 92019, Auckland 1142, New Zealand
- Re: [IPFIX] [IANA #476592] clarify IPFIX interfac… Nevil Brownlee