VxRail: Høj vSAN-ventetid og CRC-fejl på netværksnetværksnetværksstatistik
Summary: Flere værter oplever høje CRC-fejl, der fører til vSAN-ventetid.
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Symptoms
- Fra klyngemonitoren >>vSAN-tilstand: MTU-kontrol (ping med stor pakkestørrelse): Se artiklen VxRail: MTU-kontrol (ping med stor pakkestørrelse)
- MTU-kontrol (Host Large Ping Test) mislykkes periodisk
- Høje CRC-fejl set på vSAN
vmnicsStatistiktællere
esxcli network nic stats get -n vmnic1 host1 NIC statistics for vmnic1: Receive packets dropped: 0 Transmit packets dropped: 0 Total receive errors: 216001 Receive length errors: 0 Receive over errors: 0 Receive CRC errors: 216001 Receive frame errors: 0 host2 NIC statistics for vmnic1: Receive packets dropped: 0 Transmit packets dropped: 0 Total receive errors: 283604 Receive length errors: 0 Receive over errors: 0 Receive CRC errors: 283604 Receive frame errors: 0 host3 NIC statistics for vmnic1: Receive packets dropped: 0 Transmit packets dropped: 0 Total receive errors: 0 Receive length errors: 0 Receive over errors: 0 Receive CRC errors: 0 Receive frame errors: 0 host4 NIC statistics for vmnic1: Receive packets dropped: 0 Transmit packets dropped: 0 Total receive errors: 170796 Receive length errors: 0 Receive over errors: 0 Receive CRC errors: 170796
Cause
Høje CRC-fejl er symptomer på Layer 1-problemer. Det kan være et defekt kabel, SFP eller netværkskort (NIC).
Ovenstående statistik er en indikation af, at host1, host2 og host4 modtog CRC (indgående) fra host3, og host3 kan være kilden til CRC-fejlene, der forårsager problemer med vSAN-ydeevnen.
Resolution
- For at se intervallerne for CRC-fejl skal du køre kommandoen:
watch esxcli network nic stats get -n=vmnic1 | grep "Receive CRC errors"
- Luk uplink til vmnic1:
esxcli network nic down -n vmnic1
Bemærk: Sørg for, at der er uplink-redundans (f.eks. vmnic0, vmnic1), før du ændrer linkstatus til down-tilstand. På dette tidspunkt bør du ikke se nogen stigning i CRC-fejl og ingen vSAN-ventetid.
- Udskift SFP, der er tilsluttet vSAN uplink1, og skift uplink-status til UP. Overvej også at udskifte kablet til uplink i tilfælde af, at SFP-udskiftningen ikke stopper CRC-fejlene.
Affected Products
VMWare Cloud on Dell EMC VxRail E560F, VMWare Cloud on Dell EMC VxRail E560N, VxRail 460 and 470 Nodes, VxRail Appliance Family, VxRail Appliance Series, VxRail G Series Nodes, VxRail E Series Nodes, VxRail E560 VCF, VxRail E560F VCF
, VxRail E560N VCF
...
Products
VxRail E560, VxRail E560F, VxRail E560N, VxRail E660, VxRail E660F, VxRail E660N, VxRail E665, VxRail E665F, VxRail E665N, VxRail G560, VxRail G560 VCF, VxRail G560F, VxRail G560F VCF, VxRail P Series Nodes, VxRail P570, VxRail P570F, VxRail P580N
, VxRail P670F, VxRail P670N, VxRail P675F, VxRail P675N, VxRail S Series Nodes, VxRail S570, VxRail S570 VCF, VxRail S670, VxRail Software, VxRail V470, VxRail V570, VxRail V570 VCF, VxRail V570F, VxRail V570F VCF, VXRAIL V670F, VxRail VD-4510C, VxRail VD-4520C, VxRail VE-660, VxRail VE-6615, VxRail VP-760, VxRail VP-7625, VxRail VS-760
...
Article Properties
Article Number: 000182663
Article Type: Solution
Last Modified: 10 Sep 2025
Version: 7
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