Switching

Hi J-net. After upgrading several our ex3300/4200 chassiss we've got increasing output drops on "ge" interfaces.

 

user@switch> show interfaces ge-0/0/25 extensive | match Drops:
Errors: 0, Drops: 0, Framing errors: 0, Runts: 0, Policed discards: 0, L3 incompletes: 0, L2 channel errors: 0, L2 mismatch timeouts: 0, FIFO errors: 0,
Carrier transitions: 0, Errors: 0, Drops: 2195782, Collisions: 0, Aged packets: 0, FIFO errors: 0, HS link CRC errors: 0, MTU errors: 0,

 

So far I can't see any impacts caused by those drops but our zabbix started to comlane a lot. Has anyone had the same "issues" or it just can be ingnored (I haven't found such behavior in Release Notes)

There are 12 open PR for 15.1R5.5 with drop conditions listed.

 

https://prsearch.juniper.net/InfoCenter/index?page=prsearch#qt=drop&bv=15.1R5&sid=ex&dt=0&mode=simpleall&start=0&srtBy=igeneric1&rs=2&nsl=_007!generic2!Open!Y|_006!docdatetime!0!N|_002!junosversion!2!N

 

I would check to see if your configuration usage would match any of these known issues.  None of them are cosmetic but actual traffic drops.

 

If you don't seem to match an existing PR, I would open a JTAC ticket and have the issue investigated.

Hi,

 

We realised prior to 15.1 the EXs were never reporting it. Have you resolved the issue?

 

Thanks

Yesh

Hi Korsakov 

 

1. What is the utilization of the inteface ge-0/0/25? If the interface capacity is saturated we might see some drops

2. Is the output drops happening on all the interface ?

3. Can you connect PC to the port and try to ping the IRB IP and check if the drops are there ?

 

Thanks

Arul

HI,

Did you get this resolved?   We are seeing similar issues on our 4200s that we just upgraded to 15.1.

If you have cos configured and running 15.1r5, then u seem to be hitting following pr.

https://prsearch.juniper.net/InfoCenter/index?page=prcontent&id=PR571053

To resolve the issue u may refer the following thread..

https://forums.juniper.net/t5/Junos/How-to-avoid-Dropped-packets/td-p/15519