network update: 2024.12.23

blog/2024-12-23-network.md

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+---
+title: Network Team Update
+slug: 2024-12-23-network
+authors: coot
+tags: [network]
+hide_table_of_contents: false
+---
+
+## Overview of [sprint 77][sprint-77]
+
+### Initiator only mode for local roots
+
+We implemented the initiator-only mode for local roots peers described in
+[ouroboros-network#5020].  This feature will be available in
+`cardano-node-10.3` ([cardano-node#6055]).
+
+One will be able to specify `diffusionMode` (either `InitiatorOnly` or
+`IntiatorAndRespoinder`, the latter is the default) for all local roots in
+a given local roots group, e.g.
+
+```json
+{ "localRoots":
+    [ { "accessPoints":
+          [ { "address": "10.0.0.1"
+            , "port": 3001
+            }
+          ]
+      , "advertise": false
+      , "diffusionMode": "InitiatorOnly"
+      , "warmValency": 1
+      , "hotValency": 1
+      }
+    , { "accessPoints":
+          [ { "address": "10.0.0.2"
+            , "port": 3001
+            }
+          ]
+      , "advertise": true
+      , "diffusionMode": "InititiatorAndResponder"
+      , "warmValency": 1
+      , "hotValency": 1
+      }
+    ]
+, "publicRoots": []
+, "useLedgerAfterSlot": -1
+}
+```
+
+As part of [ouroboros-network#5020] we had to change how connections are
+identified in the simulated testnet environment.  We exposed
+`ConnStateIdSupply` through P2P interfaces, which allows us to use a global
+`ConnStateIdSupply` for all nodes in the simulation. This way, `ConnStateId` is
+unique for each connection in the simulation. See [ouroboros-network#5026].
+
+### Support systems with multiple IP addresses
+
+We merged [ouroboros-network#5017] which allows to run `cardano-node` on
+systems with multiple network interfaces or a single interface with multiple IP
+addresses.
+
+[sprint-77]: https://github.com/orgs/IntersectMBO/projects/5/views/1?filterQuery=sprint%3A%22Sprint+77%22
+
+### Reusable diffusion
+
+We were working on early integration of reusable diffusion work stream with
+`ouroboros-consensus` & `cardano-node`.   Reusable diffusion will allow us to
+support both `cardano-node` and `mithril-node` in the future. We are 
+pleased to say that we are running a `cardano-node` that uses
+refactored diffusion. See:
+
+* [design notes][reusable-diffusion]
+* issue: [ouroboros-network#4929]
+
+### Tx-Submission Logic
+
+We had a discussion with the consensus team (Karl Knutsson [CF], Nick Frisby
+[Tweag]) on network requirements for `tx-mempool`. See:
+
+* issue: [ouroboros-network#3311]
+* pr: [ouroboros-network#4887]
+* [ouroboros-network#4984] (Karl's changes on top of [ouroboros-network#4887])
+
+### SRV record support
+
+We continued working on the SRV support, see:
+* issue: [ouroboros-network#2883]
+* pr: [ouroboros-network#5018]
+
+### Technical Debt
+
+We renamed some of the test modules to be more consistent across various
+network components, see [ouroboros-network#5028].
+
+[Tweag]: https://www.tweag.io/
+[CF]: https://cardanofoundation.org/
+[cardano-node#6055]: https://github.com/IntersectMBO/cardano-node/pull/6055
+[ouroboros-network#2883]: https://github.com/IntersectMBO/ouroboros-network/issues/2883
+[ouroboros-network#3311]: https://github.com/IntersectMBO/ouroboros-network/issues/3311
+[ouroboros-network#4887]: https://github.com/IntersectMBO/ouroboros-network/pull/4887
+[ouroboros-network#4929]: https://github.com/IntersectMBO/ouroboros-network/issues/4929
+[ouroboros-network#4984]: https://github.com/IntersectMBO/ouroboros-network/pull/4984
+[ouroboros-network#5017]: https://github.com/IntersectMBO/ouroboros-network/issues/5017
+[ouroboros-network#5018]: https://github.com/IntersectMBO/ouroboros-network/issues/5018
+[ouroboros-network#5020]: https://github.com/IntersectMBO/ouroboros-network/issues/5020
+[ouroboros-network#5026]: https://github.com/IntersectMBO/ouroboros-network/issues/5026
+[ouroboros-network#5028]: https://github.com/IntersectMBO/ouroboros-network/issues/5028
+[reusable-diffusion]: https://github.com/IntersectMBO/ouroboros-network/discussions/4987#discussioncomment-11026976