DWDM Fiber Links issue

[umesteban29]

Good day folks,

I'm having an issue in a DC and I'm getting crazy. We have two data centers connected to each other by a DWDM Links.

I have a BAGG1 (Prod) with 5 DWDM Circuits

GE1/3/0/1 
GE1/3/0/2 
GE1/3/0/3 
GE2/3/0/1 
GE2/3/0/2

And BAG10 (BUR) with 3 DWDM Circuits

GE1/3/0/4 
GE2/3/0/3
GE2/3/0/4

The 3 links marked are flapping. But is a random flap. Last week two times, yesterday two times. This issue is beeing going for about 3 weeks.

Things done.

We replaced the modules

We replaced the SFPs

We tested the fiber

The ISP tested the fiber, they said they have a 10gb fiber where the links goes and also with other customer, so, the fiber is not the issue.

We swapped GE2/3/0/3 with GE2/3/0/4 in the BUR BAGG and GE2/3/0/4 flaps so I don't see a hardware or fiber issue

Could be the DWDM Multiplexers? Always they flap at the same time.

[Philip D'Ath]

So you are saying after swapping the ports the issue stayed with the DWDM?  That would suggest a hardware issue to me.

Are you sure all patch leads or anything else in the optical path is the same size and type (e,g. 50 micron, OM4, etc)?