> > On Waveserver, the issue appears to be a software defect that appears > when certain ports are configured with both Ethernet and OTU4 profiles > for 400G services. Resolution is based on recreating the client service > or hard rebooting the line card. There is no mention of a software > upgrade, but since the article is from 2023, I'd expect that should > already have been done.
This is a not uncommon bug on Ciena stuff. Thankfully it doesn't happen often and is a straightforward fix, although bouncing a card is obv not ideal in a lot of cases. On Mon, Jan 13, 2025 at 6:42 AM Mark Tinka <mark@tinka.africa> wrote: > > > > On 1/12/25 09:25, Mark Tinka wrote: > > > > > This sounds like a Ciena-specific issue. > > > > I have found the below on their knowledge portal: > > > > > https://my.ciena.com/CienaPortal/s/article/6500-Submarine-How-to-clear-Loss-of-Alignment-Marker-alarm-on-M2M-port > > > > > > > https://my.ciena.com/CienaPortal/s/article/Waveserver-5-Intermittent-errors-BIP-errors-or-Loss-of-Alignment-Marker-on-the-equipment-connected-to-WS5-client-ports > > > > > > We don't run Ciena, but I have reached out to a good mate at Ciena to > > see if he is aware about this and if their kit is implicated. I'll let > > you know when I hear back. > > No feedback yet from my Ciena contact, but I finally got full access to > those knowledge articles. > > The 6500 issue appears to be an AOC cable length difference between M2M > (mate-to-mate) ports. Ensuring the AOC cables are the same clears the > LOA alarm. > > On Waveserver, the issue appears to be a software defect that appears > when certain ports are configured with both Ethernet and OTU4 profiles > for 400G services. Resolution is based on recreating the client service > or hard rebooting the line card. There is no mention of a software > upgrade, but since the article is from 2023, I'd expect that should > already have been done. > > Both the 6500 and Waveserver have this issue only when 400G services are > delivered. > > The articles do point to "submarine" applications, but I'd ignore that > since the equipment used for terrestrial and submarine is largely the > same (very minor differences in the line cards). > > Will ping if my Ciena contact reaches back. > > Would be good to validate the above with your provider, and let us know > please. Thanks. > > Mark. >
