# O-RAN 7.2x Fronthaul — hosts file
#
# The fronthaul (Split Option 7.2x) runs directly over Ethernet:
#   eth : 802.1Q VLAN 202 : eCPRI : O-RAN CUS-plane
# There is NO IP layer, so VisualEther keys the swim-lanes on Ethernet
# MAC addresses via <mac-message>. This capture is transmit-side only —
# every eCPRI frame flows O-DU -> O-RU (147 122 frames in the full trace).
#
# Source: srsRAN_Project #604 (srs_gen1_tb_cisco.pcap.gz) — an srsRAN
# Distributed Unit driving a Cisco Radio Unit.

# --- Fronthaul endpoints (Layer 2 / MAC) ---
3c:fd:fe:ed:21:08    📡 O-DU
ec:79:49:f8:d9:55    📶 O-RU

# --- Sync plane (S-plane / SyncE) ---
# The O-DU is a PTP time receiver; 8c:94:1f:56:45:1c is the network reference /
# boundary clock (also the ESMC/SyncE source). PTP and ESMC use L2 multicast.
8c:94:1f:56:45:1c    🕰️ PTP Ref-Clock
01:1b:19:00:00:00    ⏱️ PTP (multicast)
01:80:c2:00:00:02    🔗 SyncE (multicast)
