On Feb 27, 2013, at 10:50 AM, "Schwarz, Albrecht (Albrecht)" <[email protected]> wrote:
> Any (new) developed terminology by I2RS docs should refer to existing IETF > RFCs. > > E.g., > FIB > => initial term definition = RFC 1812, Appendix B, Glossary: > Forwarding Information Base (FIB) > The table containing the information necessary to forward IP > Datagrams, in this document, is called the Forwarding > Information Base. At minimum, this contains the interface > identifier and next hop information for each reachable > destination network prefix. Right, but note that this is called RIB in Cisco docs: http://blog.ioshints.info/2010/09/ribs-and-fibs.html This definition also doesn't really answer the question whether FIB contains only active routes - I assume it does. The BGP spec (RFC 4271) seems to imply the following definitions: - RIB: data structures internal to each routing protocol instance; - routing table: bag of routes obtained from different sources, possibly with multiple routes for the same prefix; - forwarding table = FIB: a cleaned-up table containing only selected active routes. Lada > > > BTW: RFC 1812 is still the "default (IPv4) router model". > > => initial FIB data model = RFC 2096 (-> RFC 4292) > > There are two options for I2RS: > - already existing definition, Y/N? > - existing definition sufficient, Y/N? > IF {Y,Y} THEN just refer > IF {N,-} THEN develop term definition > IF {Y,N} THEN develop derived definition (and refer to base term) > > Albrecht > > > -----Original Message----- > From: [email protected] [mailto:[email protected]] On Behalf Of > Ladislav Lhotka > Sent: Mittwoch, 27. Februar 2013 10:32 > To: Russ White; Rob (William) Rice > Cc: [email protected] > Subject: Re: [i2rs] Router Models > > Russ White <[email protected]> writes: > >>> 2. Does the RIB in your diagram include all routes from all sources >>> or just best routes (those to be used for forwarding)? >> >> All the routes from all sources. The RIB would select which routes to >> present to the FIB based on it's internal policy (such as admin >> distance). Perhaps the "policy cloud" should really be below the RIB, >> between the RIB and the FIB. >> > > It might be useful to have an upfront agreement on the definitions of terms > like RIB, FIB, routing table and forwarding table. Previously, we had an > interesting discussion about them in the NETMOD mailing list, see this thread: > > http://www.ietf.org/mail-archive/web/netmod/current/msg06920.html > > It turned ot that each of the two major router vendors uses these terms in a > somewhat different sense, and neither of them is identical with how they are > used in IETF documents. > > Lada > > -- > Ladislav Lhotka, CZ.NIC Labs > PGP Key ID: E74E8C0C > _______________________________________________ > i2rs mailing list > [email protected] > https://www.ietf.org/mailman/listinfo/i2rs -- Ladislav Lhotka, CZ.NIC Labs PGP Key ID: E74E8C0C _______________________________________________ i2rs mailing list [email protected] https://www.ietf.org/mailman/listinfo/i2rs
