Rx power low warning

[leyakhath muhammed]

given below is the error on our secondary side switch 2960X

This fiber(ten1/49-50) is a LAN switch directly connected to dell N4064F switches (LACP).

Because of the below-depicted error on the picture, our WAN connectivity is intermittent between primary and secondary. What causes intermittent whole networks. Please advise me.

        (Primary ) SW-----------------WAN link-------  (Secondary ) SW

                          |                                                                                |

                          |                                                                                |

                        FW(HA) (static to BGP)                                           FW(HA)(OSPF to BGP)

                         | |                                                                                ||

                     2960X                                                                           2960X  

                         ||  (LACP)                                                                    ||(LACP)                                                        

                       N4064F  (Dell)                                                           N4064F(Dell)

                         ||||                                                                               ||||

                       VM                                                                                 VM                                                           

[Reza Sharifi · Accepted solution]

You may have a bad SFP+ in that port. The other option to look at is to clean the fiber patches with alcohol and see if that makes a difference. Are there any errors on the interfaces (sh interface)?

HTH

[Giuseppe Larosa · Accepted solution]

Hello @leyakhath muhammed ,

as suggested cleaning the fiber connectors may likely solve do it at both ends of the RX fiber  ( and on remote TX).

To check if one SFP+ may be not working or there is a fiber issue you can create a remote loop connecting the fibers together with a junction if both SFP+ complain the issue may be on the fiber if one SFP+ is up looped and the other ip up looped with alarm on rx power you should change that SFP+.

Hope to help

Giuseppe