LSDB DataSet » History » Version 16
Davide Pesavento, 05/09/2025 04:56 PM
Minor formatting fixes
| 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 `/$ROUTER_NAME/lsdb` and `/localhost/lsdb`. |
| 4 | 12 | Ashlesh Gawande | |
| 5 | 1 | Vince Lehman | ## LSAs |
| 6 | 2 | Vince Lehman | |
| 7 | All LSAs have 3 fields in common represented by an **LsaInfo** block: |
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| 8 | 1 | Vince Lehman | |
| 9 | LsaInfo := LSA-TYPE TLV-LENGTH |
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| 10 | 12 | Ashlesh Gawande | Name |
| 11 | 1 | Vince Lehman | SequenceNumber |
| 12 | 12 | Ashlesh Gawande | ExpirationTime |
| 13 | 1 | Vince Lehman | |
| 14 | SequenceNumber := SEQUENCE-NUMBER-TYPE TLV-LENGTH |
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| 15 | 16 | Davide Pesavento | NonNegativeInteger |
| 16 | 1 | Vince Lehman | |
| 17 | 12 | Ashlesh Gawande | ExpirationTime(Point) is the time according to the sender when the LSA will expire. |
| 18 | 1 | Vince Lehman | |
| 19 | ## Adjacency LSAs |
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| 20 | 12 | Ashlesh Gawande | |
| 21 | 16 | Davide Pesavento | All Adjacency LSAs in the LSDB are published as a [[NFD:StatusDataset|Status Dataset]] at `/$ROUTER_NAME/lsdb/adjacencies` and `/localhost/lsdb/adjacencies`. |
| 22 | 1 | Vince Lehman | |
| 23 | AdjacencyLsa := ADJACENCY-LSA-TYPE TLV-LENGTH |
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| 24 | LsaInfo |
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| 25 | Adjacency+ |
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| 26 | |||
| 27 | Adjacency := ADJACENCY-TYPE TLV-LENGTH |
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| 28 | Name |
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| 29 | Uri |
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| 30 | Cost |
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| 31 | |||
| 32 | ## Coordinate LSAs |
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| 33 | 12 | Ashlesh Gawande | |
| 34 | 16 | Davide Pesavento | All Coordinate LSAs in the LSDB are published as a [[NFD:StatusDataset|Status Dataset]] at `/$ROUTER_NAME/lsdb/coordinates` and `/localhost/lsdb/coordinates`. |
| 35 | 1 | Vince Lehman | |
| 36 | CoordinateLsa := COORDINATE-LSA-TYPE TLV-LENGTH |
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| 37 | LsaInfo |
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| 38 | HyperbolicRadius |
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| 39 | 10 | Ashlesh Gawande | HyperbolicAngle+ |
| 40 | 1 | Vince Lehman | |
| 41 | Double := DOUBLE-TYPE TLV-LENGTH(=8) |
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| 42 | double-precision floating-point number in binary64 format as defined in IEEE 754 |
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| 43 | 4 | Vince Lehman | |
| 44 | 1 | Vince Lehman | |
| 45 | HyperbolicRadius := HYPERBOLIC-RADIUS-TYPE TLV-LENGTH |
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| 46 | Double |
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| 47 | |||
| 48 | HyperbolicAngle := HYPERBOLIC-ANGLE-TYPE TLV-LENGTH |
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| 49 | Double |
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| 50 | |||
| 51 | ## Name LSAs |
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| 52 | 12 | Ashlesh Gawande | |
| 53 | 16 | Davide Pesavento | All Name LSAs in the LSDB are published as a [[NFD:StatusDataset|Status Dataset]] at `/$ROUTER_NAME/lsdb/names` and `/localhost/lsdb/names`. |
| 54 | 1 | Vince Lehman | |
| 55 | 16 | Davide Pesavento | NameLsa := NAME-LSA-TYPE TLV-LENGTH |
| 56 | LsaInfo |
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| 57 | PrefixInfo* |
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| 58 | 1 | Vince Lehman | |
| 59 | 15 | Alexander Lane | PrefixInfo := PREFIX-INFO-TYPE TLV-LENGTH |
| 60 | 16 | Davide Pesavento | Name |
| 61 | Cost |
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| 62 | 15 | Alexander Lane | |
| 63 | 1 | Vince Lehman | ## TLV-TYPE assignments |
| 64 | |||
| 65 | Type | Assigned value | Assigned value (hex) |
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| 66 | ------------------------------------------- | ----------------- | -------------------- |
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| 67 | LsaInfo | 128 | 0x80 |
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| 68 | SequenceNumber | 130 | 0x82 |
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| 69 | AdjacencyLsa | 131 | 0x83 |
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| 70 | Adjacency | 132 | 0x84 |
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| 71 | CoordinateLsa | 133 | 0x85 |
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| 72 | Double | 134 | 0x86 |
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| 73 | HyperbolicRadius | 135 | 0x87 |
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| 74 | HyperbolicAngle | 136 | 0x88 |
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| 75 | NameLsa | 137 | 0x89 |
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| 76 | LsdbStatus | 138 | 0x8A |
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| 77 | 12 | Ashlesh Gawande | ExpirationTime | 139 | 0x8B |
| 78 | 1 | Vince Lehman | Cost | 140 | 0x8C |
| 79 | Uri | 141 | 0x8D |
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| 80 | 14 | Alexander Lane | PrefixInfo | 146 | 0x92 |
| 81 | 12 | Ashlesh Gawande | |
| 82 | 16 | Davide Pesavento | See [[Routing_Table_Dataset|Routing Table Dataset]] for other assignments. |