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feat(isn): VLAN-4 routed sub-interface + addr on spine ISN ospfIf; ISN-CSW LLDP neighbor (v0.19.0)

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Real ACI multi-site spines carry the OSPF address toward the ISN on a
routed sub-interface, not the bare port: ospfIf id/dn are now
eth1/{49+si}.4 with addr=172.16.{site}.{si+1}/24 (same /24 as the
existing .254 peer); ospfAdjEp nests under the sub-if. Each spine ISN
uplink physical port also gets an ISN-CSW lldpAdjEp/cdpAdjEp
(sysName ISN-CSW{site}, portIdV Ethernet1/{si+1}, model N9K-C9364C,
locally-administered 02:1B:0D MAC hashed from site.id). Single-site
fabrics build none of this. Closes the autoACI Fabric (physical) gap
where spine uplink rows showed blank Local IP / Neighbor Port.
908 tests green.
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dtzp555-max
2026-07-07 08:17:23 +10:00
parent ff838e2467
commit f6c95a0105
12 changed files with 257 additions and 21 deletions
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CHANGELOG.md
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@@ -6,6 +6,31 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html)
(pre-1.0: minor bumps may include breaking changes to the sim's behavior).
## [0.19.0] - 2026-07-07
### Changed
- **Spine ISN-facing OSPF interface is now a routed VLAN-4 sub-interface**
(`build/underlay.py`) — real ACI multi-site spines carry the OSPF address
toward the IPN/ISN on a routed sub-interface (e.g. `eth1/49.4`), not the
bare physical port. `ospfIf.id`/dn now end in `.4` and carry a new `addr`
attribute (`172.16.{site.id}.{si+1}/24`, same `/24` as the existing
`172.16.{site.id}.254` peer); `ospfAdjEp` nests under the new sub-if
segment. The underlying physical port (`eth1/{49+si}`) and its
`l1PhysIf`/`ethpmPhysIf` are unchanged — LLDP/physical state stays there,
matching real hardware.
- **ISN CSW LLDP neighbor** (`build/fabric.py`) — each spine's ISN uplink
physical port now gets a simulated LLDP neighbor (`lldpAdjEp`/`cdpAdjEp`,
via the shared `add_adjacency` helper) representing the inter-site
network switch: `sysName=ISN-CSW{site.id}`, `portIdV=Ethernet1/{si+1}`,
model `N9K-C9364C`. Together with the sub-interface change above, this
closes the gap where autoACI's Topology "Fabric (physical)" view showed
`Local IP=-`/`Neighbor Port=-` for spine ISN uplinks — it now derives a
complete row from `ospfIf` (port + local IP), `ospfAdjEp` (remote IP),
and this `lldpAdjEp` (CSW-side port). Multi-site fabrics only; single-site
fabrics build none of this (unchanged: no OSPF/LLDP toward an ISN that
doesn't exist). New/updated assertions in `tests/test_pr19_tier2.py`,
`tests/test_pr3b_batch1.py`, `tests/test_pr5_topology_consistency.py`.
## [0.18.1] - 2026-07-07
### Changed