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Hi, Regarding the local and remote degrade issue, related with comment #246 from Eric. Note that the draft does include a FEC_degraded_SER indication (see Table 155–9—MDIO/PCS and PMA status variable mapping). My updated proposed resolution:
If there is an adjacent PHY 400GXS sublayer then the value of remote degrade in STAT<6> is equal to the value of rx_am_sf<2> from the 400GXS sublayer, and local degrade in STAT<7> is equal to the value of rx_am_sf<1>
from the 400GXS sublayer. If there is no adjacent PHY 400GXS sublayer, meaning that the 400GBASE-ZR PCS is directly connected to a MAC-RS, then the value of remote degrade in STAT<6> is set to the value of local degrade in STAT<6> of the
received status octet in the receive direction of the 400GBASE-ZR PCS, and the value of local degrade in STAT<7> in the transmit direction is set to 0.
If there is an adjacent PHY 400GXS sublayer then the value of remote degrade in STAT<6> is set to 1 if rx_am_sf<2> from the 400GXS sublayer is set to 1 or FEC_degraded_SER is set, and to 0 otherwise, and the value
of local degrade in STAT<7> is set to the value of rx_am_sf<1> from the 400GXS sublayer. If there is no adjacent PHY 400GXS sublayer, meaning that the 400GBASE-ZR PCS is directly connected to a MAC-RS, then the value of remote degrade in STAT<6> is set to one if STAT<7> of the received status octet
in the receive direction of the 400GBASE-ZR PCS is set to 1 or FEC_degraded_SER is set, and to 0 otherwise, and the value of local degrade in STAT<7> is set to 0.
If there is an adjacent PHY 400GXS sublayer, then the value of remote degrade in the received STAT<6> is passed to tx_am_sf<2> in the transmit direction of the 400GXS sublayer, and local degrade in STAT<7> is
passed to tx_am_sf<1> in the transmit direction of the 400GXS sublayer. If there is no adjacent PHY 400GXS sublayer, meaning that the 400GBASE-ZR PCS is connected to a MAC-RS, then the value of remote degrade in STAT<6> is passed to the DTE management entity to indicate a remote degrade
event, and local degrade in the received STAT<7> is passed to the remote degrade bit in STAT<7> in the transmit direction of the 400GBASE-ZR PCS.
If there is an adjacent PHY 400GXS sublayer, then the value of remote degrade in the received STAT<6> is passed to tx_am_sf<2> in the transmit direction of the 400GXS sublayer, and tx_am_sf<1> in the transmit
direction of the 400GXS sublayer is set to one if local degrade in STAT<7> is set to 1 or FEC_degraded_SER is set, and to 0 otherwise. If there is no adjacent PHY 400GXS sublayer, meaning that the 400GBASE-ZR PCS is connected to a MAC-RS, then the value of remote degrade in STAT<6> is passed to the DTE management entity to indicate a remote degrade
event, and local degrade in the received STAT<7> is passed to the transmit direction of the 400GBASE-ZR PCS. Please let us now your opinion Leon To unsubscribe from the STDS-802-3-DWDM list, click the following link: https://listserv.ieee.org/cgi-bin/wa?SUBED1=STDS-802-3-DWDM&A=1 |