Abstract: In a method for detecting loops between ports in a point-to-multipoint Gigabit Passive Optical Network, GPON, based access network, the GPON based access network may comprise an Optical Line Terminal, OLT, coupled with a plurality of Optical Network Units, ONUs. Each ONU may comprise a plurality of ports. The method may comprise a step of transmitting loop detection frames from a source port and a step of monitoring traffic that is received at a destination port. If a loop detection frame is received at the destination port, the method may further comprise a step of blocking traffic transmission and reception at the destination port.

Abstract: In a method for detecting loops between ports in a point-to-multipoint Gigabit Passive Optical Network, GPON, based access network, the GPON based access network may comprise an Optical Line Terminal, OLT, coupled with a plurality of Optical Network Units, ONUs. Each ONU may comprise a plurality of ports. The method may comprise a step of transmitting loop detection frames from a source port and a step of monitoring traffic that is received at a destination port. If a loop detection frame is received at the destination port, the method may further comprise a step of blocking traffic transmission and reception at the destination port.

Abstract: The embodiments herein relate to a method and system for continuous detection of dead and impaired IPTV streams by introducing a hardware block to continuously monitor all IPTV streams for health without software intervention as disclosed in the embodiments herein. Each IPTV packet header is looked up in the multicast forwarding database (TCAM) table. When there are matching entries, the packets are metered and compared with the expected rate for the IPTV stream. A periodic scan of all the meters in hardware is carried out. If any stream is received less than its expected rate, an “impaired error” counter is incremented for the particular stream.