Inleiding

In dit document wordt beschreven hoe de computer en leaf switch voor een specifiek Session Management Function (SMF) Cloud Native Deployment Platform (CNDP) kunnen worden geïdentificeerd en hoe de melding "network-receive-error" die in de Common Execution Environment (CEE) wordt gemeld, kan worden opgelost.

Probleem

De meldingen "network-receive-error" worden gerapporteerd op het CEE Opcenter Rack2.

[lab0200-smf/labceed22] cee# show alerts active summary
NAME UID SEVERITY STARTS AT SOURCE SUMMARY
-----------------------------------------------------------------------------------------------------------------------------------------------------
network-receive-error 998c77d6a6a0 major 10-26T00:10:31 lab0200-smf-mas Network interface "bd0" showing receive errors on hostname lab0200-s...
network-receive-error ea4217bf9d9e major 10-26T00:10:31 lab0200-smf-mas Network interface "bd0" showing receive errors on hostname lab0200-s...
network-receive-error 97fad40d2a58 major 10-26T00:10:31 lab0200-smf-mas Network interface "eno6" showing receive errors on hostname lab0200-...
network-receive-error b79540eb4e78 major 10-26T00:10:31 lab0200-smf-mas Network interface "eno6" showing receive errors on hostname lab0200-...
network-receive-error e3d163ff4012 major 10-26T00:10:01 lab0200-smf-mas Network interface "bd0" showing receive errors on hostname lab0200-s...
network-receive-error 12a7b5a5c5d5 major 10-26T00:10:01 lab0200-smf-mas Network interface "eno6" showing receive errors on hostname lab0200-...

Raadpleeg de gids voor de infrastructuuractiviteiten van Ultra Cloud Core Subscriber Microservices Infrastructure voor de beschrijving van de waarschuwing. 

Alert: network-receive-errors
 Annotations:
  Type: Communications Alarm
  Summary: Network interface "{{ $labels.device }}" showing receive errors on hostname {{ $labels.hostname }}"
  Expression:
   |
   rate(node_network_receive_errs_total{device!~"veth.+"}[2m]) > 0
For: 2m
Labels:
 Severity: major

Identificeer de bron van de waarschuwingen

Meld u aan bij CEE labceed22, controleer de waarschuwingsdetails "network-receive-error" die zijn gerapporteerd op de bd0- en eno6-interfaces om de node en pod te identificeren.

[lab0200-smf/labceed22] cee# show alerts active summary
NAME                   UID           SEVERITY  STARTS AT       SOURCE                 SUMMARY                                                            
---------------------------------------------------------------------------------------------------------------------------------------------------------
network-receive-error  3b6a0a7ce1a8  major     10-26T21:17:01  lab0200-smf-mas  Network interface "bd0" showing receive errors on hostname tpc...  
network-receive-error  15abab75c8fc  major     10-26T21:17:01  lab0200-smf-mas  Network interface "eno6" showing receive errors on hostname tp...  

Voer waarschuwingen voor actieve details en netwerkontvangstfout <UID> uit om details van de waarschuwing op te halen.

In het voorbeeld is de bron van beide waarschuwingen node lab0200-smf-primary-1 pod node-exporteur-47xmm.

[lab0200-smf/labceed22] cee# show alerts active detail network-receive-error  3b6a0a7ce1a8
alerts active detail network-receive-error 3b6a0a7ce1a8
 severity    major
 type        "Communications Alarm"
 startsAt    2021-10-26T21:17:01.913Z
 source      lab0200-smf-primary-1
 summary     "Network interface \"bd0\" showing receive errors on hostname lab0200-smf-primary-1\""
 labels      [ "alertname: network-receive-errors" "cluster: lab0200-smf_cee-labceed22" "component: node-exporter" "controller_revision_hash: 75c4cb979f" "device: bd0" "hostname: lab0200-smf-primary-1" "instance: 10.192.1.42:9100" "job: kubernetes-pods" "monitor: prometheus" "namespace: cee-labceed22" "pod: node-exporter-47xmm" "pod_template_generation: 1" "replica: lab0200-smf_cee-labceed22" "severity: major" ]
 annotations [ "summary: Network interface \"bd0\" showing receive errors on hostname lab0200-smf-primary-1\"" "type: Communications Alarm" ]

[lab0200-smf/labceed22] cee# show alerts active detail network-receive-error 15abab75c8fc
alerts active detail network-receive-error 15abab75c8fc
 severity    major
 type        "Communications Alarm"
 startsAt    2021-10-26T21:17:01.913Z
 source      lab0200-smf-primary-1
 summary     "Network interface \"eno6\" showing receive errors on hostname lab0200-smf-primary-1\""
 labels      [ "alertname: network-receive-errors" "cluster: lab0200-smf_cee-labceed22" "component: node-exporter" "controller_revision_hash: 75c4cb979f" "device: eno6" "hostname: lab0200-smf-primary-1" "instance: 10.192.1.42:9100" "job: kubernetes-pods" "monitor: prometheus" "namespace: cee-labceed22" "pod: node-exporter-47xmm" "pod_template_generation: 1" "replica: lab0200-smf_cee-labceed22" "severity: major" ]
 annotations [ "summary: Network interface \"eno6\" showing receive errors on hostname lab0200-smf-primary-1\"" "type: Communications Alarm" ]

Knooppunt, pod, poortstatus valideren

Node- en pod-validatie van primaire VIP

Log in K8s Primaire VIP van het Rack2 om de status van de bronnode en pod te valideren.

In het voorbeeld zijn beide in een goede staat: Ready and Running.

cloud-user@lab0200-smf-primary-1:~$ kubectl get nodes
NAME                         STATUS   ROLES                  AGE    VERSION
lab0200-smf-primary-1   Ready    control-plane          105d   v1.21.0
lab0200-smf-primary-2   Ready    control-plane          105d   v1.21.0
lab0200-smf-primary-3   Ready    control-plane          105d   v1.21.0
lab0200-smf-worker-1   Ready    <none>                 105d   v1.21.0
lab0200-smf-worker-2   Ready    <none>                 105d   v1.21.0
lab0200-smf-worker-3   Ready    <none>                 105d   v1.21.0
lab0200-smf-worker-4   Ready    <none>                 105d   v1.21.0
lab0200-smf-worker-5   Ready    <none>                 105d   v1.21.0

cloud-user@lab0200-smf-primary-1:~$ kubectl get pods -A -o wide | grep node-exporter--47xmm
cee-labceed22     node-exporter-47xmm                                       1/1     Running   0          18d    10.192.1.44       lab0200-smf-primary-1   <none>           <none>

Poorten validaties van K8s Primaire VIP

Valideer de interfaces bd0 en eno6 zijn UP met ip addr | grep eno6 en ip addr | grep bd0.

Opmerking: Wanneer het filter voor bd0 wordt toegepast, wordt de eno6 weergegeven in de uitvoer. De reden hiervoor is dat eno5 en eno6 zijn geconfigureerd als gebonden interfaces onder bd0, die kunnen worden gevalideerd in de SMI Cluster Deployer.

cloud-user@lab0200-smf-primary-1:~$ ip addr | grep eno6
3: eno6: <BROADCAST,MULTICAST,SECONDARY,UP,LOWER_UP> mtu 1500 qdisc mq primary bd0 state UP group default qlen 1000

cloud-user@lab0200-smf-primary-1:~$ ip addr | grep bd0
2: eno5: <BROADCAST,MULTICAST,SECONDARY,UP,LOWER_UP> mtu 1500 qdisc mq primary bd0 state UP group default qlen 1000
3: eno6: <BROADCAST,MULTICAST,SECONDARY,UP,LOWER_UP> mtu 1500 qdisc mq primary bd0 state UP group default qlen 1000
12: bd0: <BROADCAST,MULTICAST,PRIMARY,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
13: vlan111@bd0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
14: vlan112@bd0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
182: cali7a166bd093d@if4: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1440 qdisc noqueue state UP group default

Poortvalidaties van SMI Cluster Deployer

Meld u aan bij Cluster Manager VIP en vervolgens bij SSH-toegang tot Operations (Ops) Center ops-center-smi-cluster-deployer.

cloud-user@lab-deployer-cm-primary:~$ kubectl get svc -n smi-cm
NAME                                          TYPE        CLUSTER-IP       EXTERNAL-IP     PORT(S)                                                 AGE
cluster-files-offline-smi-cluster-deployer    ClusterIP   10.102.53.184    <none>          8080/TCP                                                110d
iso-host-cluster-files-smi-cluster-deployer   ClusterIP   10.102.38.70     172.16.1.102   80/TCP                                                  110d
iso-host-ops-center-smi-cluster-deployer      ClusterIP   10.102.83.54     172.16.1.102   3001/TCP                                                110d
netconf-ops-center-smi-cluster-deployer       ClusterIP   10.102.196.125   10.241.206.65   3022/TCP,22/TCP                                         110d
ops-center-smi-cluster-deployer               ClusterIP   10.102.12.170    <none>          8008/TCP,2024/TCP,2022/TCP,7681/TCP,3000/TCP,3001/TCP   110d
squid-proxy-node-port                         NodePort    10.102.72.168    <none>          3128:32572/TCP                                          110d

cloud-user@lab-deployer-cm-primary:~$ ssh -p 2024 admin@10.102.12.170
admin@10.102.12.170's password:
      Welcome to the Cisco SMI Cluster Deployer on lab-deployer-cm-primary
      Copyright © 2016-2020, Cisco Systems, Inc.
      All rights reserved.
admin connected from 172.16.1.100 using ssh on ops-center-smi-cluster-deployer-5cdc5f94db-bnxqt
[lab-deployer-cm-primary] SMI Cluster Deployer# 

Controleer de cluster-, knooppuntstandaardinstellingen, interfaces en parametermodus voor de knooppunt. In het voorbeeld de LAB0200-SMF.

[lab-deployer-cm-primary] SMI Cluster Deployer#  show running-config clusters
clusters lab0200-smf
 environment lab0200-smf-deployer_1
…
 node-defaults initial-boot netplan ethernets eno5
  dhcp4 false
  dhcp6 false
 exit
 node-defaults initial-boot netplan ethernets eno6
  dhcp4 false
  dhcp6 false
 exit
 node-defaults initial-boot netplan ethernets enp216s0f0
  dhcp4 false
  dhcp6 false
 exit
 node-defaults initial-boot netplan ethernets enp216s0f1
  dhcp4 false
  dhcp6 false
 exit
 node-defaults initial-boot netplan ethernets enp94s0f0
  dhcp4 false
  dhcp6 false
 exit
 node-defaults initial-boot netplan ethernets enp94s0f1
  dhcp4 false
  dhcp6 false
 exit
node-defaults initial-boot netplan bonds bd0
  dhcp4      false
  dhcp6      false
  optional   true
  interfaces [ eno5 eno6 ]
  parameters mode      active-backup
  parameters mii-monitor-interval 100
  parameters fail-over-mac-policy active
 exit

In de Primaire VIP valideren fouten en/of vallen op interfaces bd0 en eno6.

Wanneer beide interfaces vallen, moet de UCS- of Leaf switch-hardware worden gecontroleerd op hardwareproblemen.

cloud-user@lab0200-smf-primary-1:~$  ifconfig bd0
bd0: flags=5187<UP,BROADCAST,RUNNING,PRIMARY,MULTICAST>  mtu 1500
        inet6 fe80::8e94:1fff:fef6:53cd  prefixlen 64  scopeid 0x20<link>
        ether 8c:94:1f:f6:53:cd  txqueuelen 1000  (Ethernet)
        RX packets 47035763777  bytes 19038286946282 (19.0 TB)
        RX errors 49541  dropped 845484  overruns 0  frame 49541
        TX packets 53797663096  bytes 32320571418654 (32.3 TB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

cloud-user@lab0200-smf-primary-1:~$  ifconfig eno6
eno6: flags=6211<UP,BROADCAST,RUNNING,SECONDARY,MULTICAST>  mtu 1500
        ether 8c:94:1f:f6:53:cd  txqueuelen 1000  (Ethernet)
        RX packets 47035402290  bytes 19038274391478 (19.0 TB)
        RX errors 49541  dropped 845484  overruns 0  frame 49541
        TX packets 53797735337  bytes 32320609021235 (32.3 TB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

De UCS-server identificeren

UCS-servervalidatie van SMI Cluster Deployer 

Voer actieve clusters <clusternaam> nodes <nodenaam> uit in de SMI Cluster Deployer om het CIMC-IP-adres van de UCS-server te achterhalen.

[lab-deployer-cm-primary] SMI Cluster Deployer# show running-config clusters lab0200-smf nodes primary-1
clusters lab0200-smf
nodes primary-1
  maintenance  false
  host-profile cp-data-r2-sysctl
  k8s node-type       primary
  k8s ssh-ip          10.192.1.42
  k8s sshd-bind-to-ssh-ip true
  k8s node-ip         10.192.1.42
  k8s node-labels smi.cisco.com/node-type oam
  exit
  k8s node-labels smi.cisco.com/node-type-1 proto
  exit
  ucs-server cimc user admin
...
  ucs-server cimc ip-address 172.16.1.62
...
  exit

SSH naar het CIMC IP-adres 172.16.1.62 via de Active CM en valideer de servernaam.

In het voorbeeld is de servernaam LAB0200-Server8-02.

cloud-user@lab-deployer-cm-primary:~$ ssh admin@172.16.1.62
Warning: Permanently added '172.16.1.62' (RSA) to the list of known hosts.
admin@172.16.1.62's password:
LAB0200-Server8-02#

Opmerking: Valideer de naam van de server in de Customer Information Questionnaire (CIQ) als de CIQ beschikbaar is.

De primaire VIP-poorten en UCS-netwerkinterfaces in kaart brengen

Controleer bij Primaire VIP de namen van de fysieke interface voor eno6 met de opdracht ls -la /sys/class/net. Wanneer in het voorbeeld lscpi wordt gebruikt om het eno6-apparaat te identificeren, moet poort 1d:00.1 worden gebruikt om eno6 te identificeren.

cloud-user@lab0200-smf-primary-1:~$ ls -la /sys/class/net
total 0
drwxr-xr-x  2 root root    0 Oct 12 06:18 .
drwxr-xr-x 87 root root    0 Oct 12 06:18 ..
lrwxrwxrwx  1 root root    0 Oct 12 06:18 bd0 -> ../../devices/virtual/net/bd0
lrwxrwxrwx  1 root root    0 Oct 12 06:18 bd1 -> ../../devices/virtual/net/bd1
…
lrwxrwxrwx  1 root root    0 Oct 12 06:18 eno5 -> ../../devices/pci0000:17/0000:17:00.0/0000:18:00.0/0000:19:01.0/0000:1b:00.0/0000:1c:00.0/0000:1d:00.0/net/eno5
lrwxrwxrwx  1 root root    0 Oct 12 06:18 eno6 -> ../../devices/pci0000:17/0000:17:00.0/0000:18:00.0/0000:19:01.0/0000:1b:00.0/0000:1c:00.0/0000:1d:00.1/net/eno6

Opmerking: De lspci toont informatie over alle apparaten op de UCS-server, zoals MLOM, SLOM, PCI, enzovoort. De apparaatinformatie kan worden gebruikt om de namen van de interfaces in ls -la /sys/class/net-opdrachtuitvoer in kaart te brengen.

In het voorbeeld behoort poort 1d:00.1 tot de MLOM- en eno6-interface. De eno5 heeft een 1d:00.0 MLOM-poort.

cloud-user@lab0200-smf-primary-1:~$ lspci
……
1d:00.0 Ethernet controller: Cisco Systems Inc VIC Ethernet NIC (rev a2)
1d:00.1 Ethernet controller: Cisco Systems Inc VIC Ethernet NIC (rev a2)
3b:00.0 Ethernet controller: Intel Corporation Ethernet Controller 10G X550T (rev 01)
3b:00.1 Ethernet controller: Intel Corporation Ethernet Controller 10G X550T (rev 01)
5e:00.0 Ethernet controller: Intel Corporation Ethernet Controller XL710 for 40GbE QSFP+ (rev 02)
5e:00.1 Ethernet controller: Intel Corporation Ethernet Controller XL710 for 40GbE QSFP+ (rev 02)
d8:00.0 Ethernet controller: Intel Corporation Ethernet Controller XL710 for 40GbE QSFP+ (rev 02)
d8:00.1 Ethernet controller: Intel Corporation Ethernet Controller XL710 for 40GbE QSFP+ (rev 02)

In de CIMC GUI komt het MLOM MAC-adres overeen dat wordt gezien op ifconfig-uitvoer van Primary VIP.

cloud-user@lab0200-smf-primary-1:~$  ifconfig bd0
bd0: flags=5187<UP,BROADCAST,RUNNING,PRIMARY,MULTICAST>  mtu 1500
        inet6 fe80::8e94:1fff:fef6:53cd  prefixlen 64  scopeid 0x20<link>
        ether 8c:94:1f:f6:53:cd  txqueuelen 1000  (Ethernet)
        RX packets 47035763777  bytes 19038286946282 (19.0 TB)
        RX errors 49541  dropped 845484  overruns 0  frame 49541
        TX packets 53797663096  bytes 32320571418654 (32.3 TB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0


cloud-user@lab0200-smf-primary-1:~$  ifconfig eno6
eno6: flags=6211<UP,BROADCAST,RUNNING,SECONDARY,MULTICAST>  mtu 1500
        ether 8c:94:1f:f6:53:cd  txqueuelen 1000  (Ethernet)
        RX packets 47035402290  bytes 19038274391478 (19.0 TB)
        RX errors 49541  dropped 845484  overruns 0  frame 49541
        TX packets 53797735337  bytes 32320609021235 (32.3 TB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

Identificeer de Leaf Switch

In het Cluster Manager-netwerk zijn de MLOM (eno5/eno6), zoals weergegeven in de afbeelding, verbonden met de bladeren 1 en 2.

Opmerking: als de CIQ beschikbaar is, laat Validate hostnamen achter in CIQ.

Log in op beide Leaves en grijp de naam van de server. 

In het voorbeeld zijn de LAB0200-Server8-02 MLOM- en MLOM-interfaces verbonden met interfaces Eth1/49 op Leaf1 en Leaf2.

Leaf1# sh int description | inc LAB0200-Server8-02
Eth1/10       eth    40G     PCIE-01-2-LAB0200-Server8-02
Eth1/30       eth    40G     PCIE-02-2-LAB0200-Server8-02
Eth1/49       eth    40G     LAB0200-Server8-02 MLOM-P2


Leaf2# sh int description | inc LAB0200-Server8-02
Eth1/10       eth    40G     PCIE-01-1-LAB0200-Server8-02
Eth1/30       eth    40G     PCIE-02-1-LAB0200-Server8-02
Eth1/49       eth    40G     LAB0200-Server8-02 MLOM-P1

Oplossing

Belangrijk: elk probleem heeft zijn eigen analyse nodig. Als er geen fouten worden gevonden aan de Nexus-kant, controleer dan de UCS-serverinterfaces op fouten.

In het scenario is het probleem gerelateerd aan de verbindingsfout op Leaf1 int eth1/49 die is verbonden met LAB0200-Server8-02 MLOM eno6.

De UCS-server is gevalideerd en er is geen hardwareprobleem gevonden, MLOM en poorten waren in goede staat.

Leaf1 toonde TX Output fouten:

Leaf1# sh int Eth1/49
Ethernet1/49 is up
admin state is up, Dedicated Interface
  Hardware: 10000/40000/100000 Ethernet, address: e8eb.3437.48ca (bia e8eb.3437.48ca)
  Description: LAB0200-Server8-02 MLOM-P2
  MTU 9216 bytes, BW 40000000 Kbit , DLY 10 usec
  reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation ARPA, medium is broadcast
  Port mode is trunk
  full-duplex, 40 Gb/s, media type is 40G
  Beacon is turned off
  Auto-Negotiation is turned on  FEC mode is Auto
  Input flow-control is off, output flow-control is off
  Auto-mdix is turned off
  Rate mode is dedicated
  Switchport monitor is off
  EtherType is 0x8100
  EEE (efficient-ethernet) : n/a
    admin fec state is auto, oper fec state is off
  Last link flapped 5week(s) 6day(s)
  Last clearing of "show interface" counters never
  12 interface resets
  Load-Interval #1: 30 seconds
    30 seconds input rate 162942488 bits/sec, 26648 packets/sec
    30 seconds output rate 35757024 bits/sec, 16477 packets/sec
    input rate 162.94 Mbps, 26.65 Kpps; output rate 35.76 Mbps, 16.48 Kpps
  Load-Interval #2: 5 minute (300 seconds)
    300 seconds input rate 120872496 bits/sec, 22926 packets/sec
    300 seconds output rate 54245920 bits/sec, 17880 packets/sec
    input rate 120.87 Mbps, 22.93 Kpps; output rate 54.24 Mbps, 17.88 Kpps
  RX
    85973263325 unicast packets  6318912 multicast packets  55152 broadcast packets
    85979637389 input packets  50020924423841 bytes
    230406880 jumbo packets  0 storm suppression bytes
    0 runts  0 giants  0 CRC  0 no buffer
    0 input error  0 short frame  0 overrun   0 underrun  0 ignored
    0 watchdog  0 bad etype drop  0 bad proto drop  0 if down drop
    0 input with dribble  0 input discard
    0 Rx pause
  TX
    76542979816 unicast packets  88726302 multicast packets  789768 broadcast packets
    76632574981 output packets  29932747104403 bytes
    3089287610 jumbo packets
    79095 output error  0 collision  0 deferred  0 late collision
    0 lost carrier  0 no carrier  0 babble  0 output discard
    0 Tx pause

De "network-receive-error" waarschuwing werd opgelost met kabelvervanging op int eth1/49 Leaf1.

De laatste interfacekoppeling werd vlak voor de vervanging van de kabel gemeld.

2021 Nov 17 07:36:48 TPLF0201 %BFD-5-SESSION_STATE_DOWN: BFD session 1090519112 to neighbor 10.22.101.1 on interface Vlan2201 has gone down. Reason: Control 
Detection Time Expired.
2021 Nov 17 07:37:30 TPLF0201 %BFD-5-SESSION_STATE_DOWN: BFD session 1090519107 to neighbor 10.22.101.2 on interface Vlan2201 has gone down. Reason: Control 
Detection Time Expired.
2021 Nov 18 05:09:12 TPLF0201 %ETHPORT-5-IF_DOWN_LINK_FAILURE: Interface Ethernet1/48 is down (Link failure)

De waarschuwingen worden gewist op eno6/bd0 van de gelanceerde22 na de kabelvervanging.

[lab0200-smf/labceed22] cee# show alerts active summary
NAME UID SEVERITY STARTS AT SOURCE SUMMARY
---------------------------------------------------------------------------------------------------------------------------------------------------------
watchdog a62f59201ba8 minor 11-02T05:57:18 System This is an alert meant to ensure that the entire alerting pipeline is functional. This ale...