TSN (Time-Sensitive Networking)

An independent per-port descriptor BFM, written clean-room from tsn_switch‘s own documented ingress/egress descriptor interface and CSR register map — not from its internal forwarding FSM — drives SEND_INGRESS/drains RECV_EGRESS on the real catalog tsn_switch. A passive checker builds its own MAC-learning/destination-lookup model purely from observed ingress traffic and cross-checks every real egress port firing and its echoed descriptor fields against it. Covers source learning, unicast forwarding with split-horizon, and flood-on-miss/broadcast-DA — the generic L2 forwarding contract this descriptor-level abstraction exposes. This is a header/descriptor-level model (parsed {da,sa,vlan,prio,len} fields, not raw byte-stream Ethernet framing); the MAC/PHY datapath is the separate catalog gmac IP per tsn_switch‘s own integration-guide pointer.

Key Features

• Independent descriptor BFM: SEND_INGRESS/RECV_EGRESS task API drives/observes the real per-port ingress/egress descriptor ports directly — no shared code with the DUT
• Passive checker builds its own MAC-table (learn-on-SA, lookup-on-DA, split-horizon, flood) purely from observed ingress traffic and cross-checks real egress port selection + field echo against it
• Self-checking interop TB: MAC learning, unicast forward, flood-on-miss, broadcast-DA, plus a directed wrong-expected-egress-port injection proving the checker catches it
• Descriptor-level scope only — no raw Ethernet byte-stream framing/CRC (that’s the separate gmac/eth_t1_mac MAC-layer VIPs); 3-port default topology as configured in the RTL

Standards & Compliance

IEEE 802.1 TSN task-group standards, 802.1AS (gPTP), 802.1AE (MACsec)

Pairs With

Built to lean against these catalog IPs during integration:

• tsn_switch