Subject: [Isis-wg] spf implementation for level2

From: nabendu das <[email-masked]>
Date: Fri, 5 Oct 2001 04:28:31 -0700 (PDT)

hi list,

about SPF implementation as per  ISO -10589, TENT and PATH are of the form <N, d(N), adj(N)> where N is a system identifier of 8 octet. But level2 SPF database & level2 forwarding database stores the address prefixs of the destination area. now my question is how to get area or area prefix after the SPF because we are operating the SPF only on system IDs. one thing can be done to get the area addresses from the LSP of the IS .  but then how to arrange the SPF & forwarding database for level 2. for level1, we can hash on system ID & can store all the info of SPF &  forwarding database in a single linked list for all the systems whose ID hashes to a particular hash value. 

u plz guide me for level 2 data structures for SPF & forwarding & also how to arrange those data structures. can we use hashing, & if so how is it done  on the area addresses/ area prefixes.

thanking in advance

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