LSDB DataSet » History » Version 17
Alexander Lane, 05/19/2025 02:53 PM
| 1 | 12 | Ashlesh Gawande | # LSA TLV encoding for NLSR-to-NLSR and NLSR-to-NLSRC (LSDB DataSet) communication |
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| 2 | 1 | Vince Lehman | |
| 3 | 16 | Davide Pesavento | LSDB datasets are published in the namespace `/$ROUTER_NAME/lsdb` and `/localhost/lsdb`. |
| 4 | 12 | Ashlesh Gawande | |
| 5 | 1 | Vince Lehman | ## LSAs |
| 6 | 2 | Vince Lehman | |
| 7 | All LSAs have 3 fields in common represented by an **LsaInfo** block: |
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| 8 | 1 | Vince Lehman | |
| 9 | LsaInfo := LSA-TYPE TLV-LENGTH |
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| 10 | 12 | Ashlesh Gawande | Name |
| 11 | 1 | Vince Lehman | SequenceNumber |
| 12 | 12 | Ashlesh Gawande | ExpirationTime |
| 13 | 1 | Vince Lehman | |
| 14 | SequenceNumber := SEQUENCE-NUMBER-TYPE TLV-LENGTH |
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| 15 | 16 | Davide Pesavento | NonNegativeInteger |
| 16 | 1 | Vince Lehman | |
| 17 | 12 | Ashlesh Gawande | ExpirationTime(Point) is the time according to the sender when the LSA will expire. |
| 18 | 1 | Vince Lehman | |
| 19 | 17 | Alexander Lane | Additionally, all three utilize the following encoding for double-precision floating point numbers in differing fields: |
| 20 | |||
| 21 | Double := DOUBLE-TYPE TLV-LENGTH(=8) |
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| 22 | double-precision floating-point number in binary64 format as defined in IEEE 754 |
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| 23 | |||
| 24 | 1 | Vince Lehman | ## Adjacency LSAs |
| 25 | 12 | Ashlesh Gawande | |
| 26 | 16 | Davide Pesavento | All Adjacency LSAs in the LSDB are published as a [[NFD:StatusDataset|Status Dataset]] at `/$ROUTER_NAME/lsdb/adjacencies` and `/localhost/lsdb/adjacencies`. |
| 27 | 1 | Vince Lehman | |
| 28 | AdjacencyLsa := ADJACENCY-LSA-TYPE TLV-LENGTH |
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| 29 | LsaInfo |
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| 30 | Adjacency+ |
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| 31 | |||
| 32 | Adjacency := ADJACENCY-TYPE TLV-LENGTH |
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| 33 | Name |
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| 34 | Uri |
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| 35 | Cost |
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| 36 | |||
| 37 | 17 | Alexander Lane | Cost := COST-TYPE TLV-LENGTH |
| 38 | Double |
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| 39 | |||
| 40 | 1 | Vince Lehman | ## Coordinate LSAs |
| 41 | |||
| 42 | All Coordinate LSAs in the LSDB are published as a [[NFD:StatusDataset|Status Dataset]] at `/$ROUTER_NAME/lsdb/coordinates` and `/localhost/lsdb/coordinates`. |
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| 43 | 10 | Ashlesh Gawande | |
| 44 | 1 | Vince Lehman | CoordinateLsa := COORDINATE-LSA-TYPE TLV-LENGTH |
| 45 | LsaInfo |
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| 46 | HyperbolicRadius |
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| 47 | 4 | Vince Lehman | HyperbolicAngle+ |
| 48 | 1 | Vince Lehman | |
| 49 | HyperbolicRadius := HYPERBOLIC-RADIUS-TYPE TLV-LENGTH |
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| 50 | Double |
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| 51 | |||
| 52 | HyperbolicAngle := HYPERBOLIC-ANGLE-TYPE TLV-LENGTH |
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| 53 | Double |
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| 54 | |||
| 55 | ## Name LSAs |
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| 56 | 12 | Ashlesh Gawande | |
| 57 | 16 | Davide Pesavento | All Name LSAs in the LSDB are published as a [[NFD:StatusDataset|Status Dataset]] at `/$ROUTER_NAME/lsdb/names` and `/localhost/lsdb/names`. |
| 58 | 1 | Vince Lehman | |
| 59 | 16 | Davide Pesavento | NameLsa := NAME-LSA-TYPE TLV-LENGTH |
| 60 | LsaInfo |
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| 61 | PrefixInfo* |
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| 62 | 1 | Vince Lehman | |
| 63 | PrefixInfo := PREFIX-INFO-TYPE TLV-LENGTH |
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| 64 | Name |
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| 65 | Cost |
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| 66 | 17 | Alexander Lane | |
| 67 | Cost := COST-TYPE TLV-LENGTH |
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| 68 | Double |
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| 69 | 15 | Alexander Lane | |
| 70 | 1 | Vince Lehman | ## TLV-TYPE assignments |
| 71 | |||
| 72 | Type | Assigned value | Assigned value (hex) |
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| 73 | ------------------------------------------- | ----------------- | -------------------- |
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| 74 | LsaInfo | 128 | 0x80 |
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| 75 | SequenceNumber | 130 | 0x82 |
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| 76 | AdjacencyLsa | 131 | 0x83 |
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| 77 | Adjacency | 132 | 0x84 |
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| 78 | CoordinateLsa | 133 | 0x85 |
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| 79 | Double | 134 | 0x86 |
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| 80 | HyperbolicRadius | 135 | 0x87 |
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| 81 | HyperbolicAngle | 136 | 0x88 |
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| 82 | NameLsa | 137 | 0x89 |
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| 83 | LsdbStatus | 138 | 0x8A |
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| 84 | 12 | Ashlesh Gawande | ExpirationTime | 139 | 0x8B |
| 85 | 1 | Vince Lehman | Cost | 140 | 0x8C |
| 86 | Uri | 141 | 0x8D |
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| 87 | 14 | Alexander Lane | PrefixInfo | 146 | 0x92 |
| 88 | 12 | Ashlesh Gawande | |
| 89 | 16 | Davide Pesavento | See [[Routing_Table_Dataset|Routing Table Dataset]] for other assignments. |