As branch router, we use an RB4011iGS+ with an S-RJ01 SFP connected to the 1GB leased Ethernet uplink. The 1GB cable from the basement is planned to be updated to fibre later this year. So once this happend, we will just have to replace the S-RJ01 SFP module with an optical one.
Intallation and setup with VLANs, Queus and VoIP went smooth and everything was working. All was rainbows and unicorns until we got user complaints on sporadic short (3-5 seconds) interruptions in Teams/Zoom meetings and SIP VoIP.
The log of the RB4011 shows short link down/up events on the SFP(+) interface:
Code: Select all
mar/04 11:48:11 interface,info sfp-sfpplus1 link down
mar/04 11:48:12 interface,info sfp-sfpplus1 link up (speed 10M, half duplex)
mar/04 11:48:14 interface,info sfp-sfpplus1 link down
mar/04 11:48:15 interface,info sfp-sfpplus1 link up (speed 1G, full duplex)
...
mar/04 14:12:17 interface,info sfp-sfpplus1 link down
mar/04 14:12:18 interface,info sfp-sfpplus1 link up (speed 10M, half duplex)
mar/04 14:12:20 interface,info sfp-sfpplus1 link down
mar/04 14:12:21 interface,info sfp-sfpplus1 link up (speed 1G, full duplex)
...
mar/04 14:26:14 interface,info sfp-sfpplus1 link down
mar/04 14:26:15 interface,info sfp-sfpplus1 link up (speed 10M, half duplex)
mar/04 14:26:17 interface,info sfp-sfpplus1 link down
mar/04 14:26:18 interface,info sfp-sfpplus1 link up (speed 1G, full duplex)
Setup:
RB4011iGS+ running ROS 6.48.1
MikroTik S-RJ01 (supported for RB4011 according to the MikroTik SFP support table) 1GB Copper SFP module for WAN uplink to ISP Cisco switch
As a temporary solution, we changed the uplink connection from S-RJ01/SFP to the ether1 port of the RB4011. This works fine without issues and link flaps using the same cable to the basement. Is there any known issue with S-RJ01 in RB4011? Or shall we RMA the S-RJ01 module?