Hi Peter, Thanks for your response. See my questions below -
On Tue, Apr 17, 2018 at 2:31 AM, Peter Psenak <ppse...@cisco.com> wrote: > Hi Uma, > > please see inline: > > > On 17/04/18 00:14 , Uma Chunduri wrote: > >> Dear All, >> I am neutral to combining the content of OSPF and IS-IS into a single >> draft. >> However, I have 2 questions on this draft. >> 1. >> 0 1 2 3 >> 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 >> +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ >> | Type | Length | Algorithm | Metric Type | >> +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ >> | Alg. Type | Priority | >> +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ >> | Sub-TLVs | >> + + >> | ... | >> | | >> +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ >> */ Algorithm: Flex-Algorithm number. Value between 128 and 255/* >> */ inclusive./* >> */ Algorithm Type: Single octet identifying the algorithm type used/* >> */ to compute paths for the Flex-Algoritm. Values are defined in/* >> */ "IGP Algorithm Types" registry defined under "Interior Gateway/* >> */ Protocol (IGP) Parameters" IANA registries./* >> Why there are two fields "Algorithm" and "Algorithm Type" ? >> > > these are being renamed in the next update to: > > Flex-Algorithm - Single octet value between 128 and 255 inclusive > 1. "Algorithm " as defined in the draft - I see is nothing but a light weight sub topology (with out MT ADJs) computed using an "Alg. Type". As of now - "Algorithm" type X is using "Alg.Type" Y to compute routes? After the change you mentioned, this would become "Algorithm" type X is using "Alg.Type" Y to compute routes? IMO, Overloading of the terms cause lot of confusion (and mis-understanding) down the line. This happened already in a different context for IS-IS; ask me how I will give clear example. I followed the other thread and agree with some of the points raised by Jie w.r.t what is being defined and what is being done. > > IGP Alg. Type - Single octet. Value between 0 and 127 inclusive, that > identifies IGP algorithm type used to compute paths for the Flex-Algoritm. > Values are defined in "IGP Algorithm Types" registry defined under > "Interior Gateway Protocol (IGP) Parameters" IANA registries > What are we saving here by overloading the terminology?
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