ben.de-clercq@hpe.com wrote: The 5700 switch does have boundary PTP or is that Transparent PTP?
Hi! he we were discussing on PTP against HPE Aruba switch series, not against HPE FlexNetwork and/or HPE FlexFabric switch series.
Beside the fact that IEEE 1588 version 2 and IEEE 802.1AS standard profiles are supported, the HPE FlexFabric 5700 Switch Series supports these types of basic clock nodes:
- Ordinary Clock (OC): A PTP clock with a single PTP port in a PTP domain for time synchronization. It synchronizes time from its upstream clock node through the port. If a clock node works as the clock source and sends synchronization time through a single PTP port to its downstream clock node, it is also called an OC.
- Boundary Clock (BC): A clock with more than one PTP port in a PTP domain for time synchronization. A BC uses one of the ports to synchronize time from its upstream clock node, and uses the other ports to synchronize time to the relevant upstream clock nodes. If a clock node works as the clock source and synchronizes time through multiple PTP ports to its downstream clock nodes, it is also called a BC.
- Transparent Clock (TC): A TC does not need to keep time consistency with other clock nodes. A TC has multiple PTP ports. It only forwards PTP messages among these ports and performs delay corrections for the messages, instead of performing time synchronization. TCs include the following types:
- End-to-End Transparent Clock (E2ETC): Forwards non-P2P packets in the network and calculates the delay of the entire link.
- Peer-to-Peer Transparent Clock (P2PTC): Forwards only Sync, Follow_Up, and Announce messages, terminates other PTP messages, and calculates the delay of each link segment
Reference: HPE FlexFabric 5700 Switch Series Network Management and Monitoring Configuration Guide (5200-4622, November 2017), page 46 (sheet 55 of 312).
Note: ironically instead the latest HPE FlexFabric 5700 Switch Series QuickSpecs (Edition 15, 18 November 2019) the PTP - RFC 1588 - is erroneously reporting the switch series as IEEE 1855 compliant...and no specification about clock nodes type is provided.