Isn't FEC required by the 400G spec?
On Wed, Apr 17, 2024 at 3:45 PM Aaron Gould <aar...@gvtc.com> wrote:
> i did. Usually my NANOG and J-NSP email list gets me a quicker solution
> than JTAC.
>
> -Aaron
> On 4/17/2024 2:37 PM, Dominik Dobrowolski wrote:
>
> Open a JTAC case,
> That looks like a work for them
>
>
> Kind Regards,
> Dominik
>
> W dniu śr., 17.04.2024 o 21:36 Aaron Gould <aar...@gvtc.com> napisał(a):
>
>> We recently added MPC10E-15C-MRATE cards to our MX960's to upgrade our core
>> to 400g. During initial testing of the 400g interface (400GBASE-FR4), I see
>> constant FEC errors. FEC is new to me. Anyone know why this is occurring?
>> Shown below, is an interface with no traffic, but seeing constant FEC
>> errors. This is (2) MX960's cabled directly, no dwdm or anything between
>> them... just a fiber patch cable.
>>
>>
>>
>> {master}
>> me@mx960> clear interfaces statistics et-7/1/4
>>
>> {master}
>> me@mx960> show interfaces et-7/1/4 | grep rror | refresh 2
>> ---(refreshed at 2024-04-17 14:18:53 CDT)---
>> Link-level type: Ethernet, MTU: 1514, MRU: 1522, Speed: 400Gbps, BPDU
>> Error: None, Loop Detect PDU Error: None, Loopback: Disabled, Source
>> filtering: Disabled,
>> Bit errors 0
>> Errored blocks 0
>> Ethernet FEC statistics Errors
>> FEC Corrected Errors 0
>> FEC Uncorrected Errors 0
>> FEC Corrected Errors Rate 0
>> FEC Uncorrected Errors Rate 0
>> ---(refreshed at 2024-04-17 14:18:55 CDT)---
>> Link-level type: Ethernet, MTU: 1514, MRU: 1522, Speed: 400Gbps, BPDU
>> Error: None, Loop Detect PDU Error: None, Loopback: Disabled, Source
>> filtering: Disabled,
>> Bit errors 0
>> Errored blocks 0
>> Ethernet FEC statistics Errors
>> FEC Corrected Errors 4302
>> FEC Uncorrected Errors 0
>> FEC Corrected Errors Rate 8
>> FEC Uncorrected Errors Rate 0
>> ---(refreshed at 2024-04-17 14:18:57 CDT)---
>> Link-level type: Ethernet, MTU: 1514, MRU: 1522, Speed: 400Gbps, BPDU
>> Error: None, Loop Detect PDU Error: None, Loopback: Disabled, Source
>> filtering: Disabled,
>> Bit errors 0
>> Errored blocks 0
>> Ethernet FEC statistics Errors
>> FEC Corrected Errors 8796
>> FEC Uncorrected Errors 0
>> FEC Corrected Errors Rate 146
>> FEC Uncorrected Errors Rate 0
>> ---(refreshed at 2024-04-17 14:18:59 CDT)---
>> Link-level type: Ethernet, MTU: 1514, MRU: 1522, Speed: 400Gbps, BPDU
>> Error: None, Loop Detect PDU Error: None, Loopback: Disabled, Source
>> filtering: Disabled,
>> Bit errors 0
>> Errored blocks 0
>> Ethernet FEC statistics Errors
>> FEC Corrected Errors 15582
>> FEC Uncorrected Errors 0
>> FEC Corrected Errors Rate 111
>> FEC Uncorrected Errors Rate 0
>> ---(refreshed at 2024-04-17 14:19:01 CDT)---
>> Link-level type: Ethernet, MTU: 1514, MRU: 1522, Speed: 400Gbps, BPDU
>> Error: None, Loop Detect PDU Error: None, Loopback: Disabled, Source
>> filtering: Disabled,
>> Bit errors 0
>> Errored blocks 0
>> Ethernet FEC statistics Errors
>> FEC Corrected Errors 20342
>> FEC Uncorrected Errors 0
>> FEC Corrected Errors Rate 256
>> FEC Uncorrected Errors Rate 0
>>
>> {master}
>> me@mx960> show interfaces et-7/1/4 | grep "put rate"
>> Input rate : 0 bps (0 pps)
>> Output rate : 0 bps (0 pps)
>>
>> {master}
>> me@mx960> show interfaces et-7/1/4
>> Physical interface: et-7/1/4, Enabled, Physical link is Up
>> Interface index: 226, SNMP ifIndex: 800
>> Link-level type: Ethernet, MTU: 1514, MRU: 1522, Speed: 400Gbps, BPDU
>> Error: None, Loop Detect PDU Error: None, Loopback: Disabled, Source
>> filtering: Disabled,
>> Flow control: Enabled
>> Pad to minimum frame size: Disabled
>> Device flags : Present Running
>> Interface flags: SNMP-Traps Internal: 0x4000
>> Link flags : None
>> CoS queues : 8 supported, 8 maximum usable queues
>> Schedulers : 0
>> Last flapped : 2024-04-17 13:55:28 CDT (00:36:19 ago)
>> Input rate : 0 bps (0 pps)
>> Output rate : 0 bps (0 pps)
>> Active alarms : None
>> Active defects : None
>> PCS statistics Seconds
>> Bit errors 0
>> Errored blocks 0
>> Ethernet FEC Mode : FEC119
>> Ethernet FEC statistics Errors
>> FEC Corrected Errors 801787
>> FEC Uncorrected Errors 0
>> FEC Corrected Errors Rate 2054
>> FEC Uncorrected Errors Rate 0
>> Link Degrade :
>> Link Monitoring : Disable
>> Interface transmit statistics: Disabled
>>
>> Logical interface et-7/1/4.0 (Index 420) (SNMP ifIndex 815)
>> Flags: Up SNMP-Traps 0x4004000 Encapsulation: ENET2
>> Input packets : 1
>> Output packets: 1
>> Protocol inet, MTU: 1500
>> Max nh cache: 75000, New hold nh limit: 75000, Curr nh cnt: 1, Curr new
>> hold cnt: 0, NH drop cnt: 0
>> Flags: Sendbcast-pkt-to-re
>> Addresses, Flags: Is-Preferred Is-Primary
>> Destination: 10.10.10.76/30, Local: 10.10.10.77, Broadcast:
>> 10.10.10.79
>>
>>
>> --
>> -Aaron
>>
>> --
> -Aaron
>
>
