Hello,
I have got two CRS226-24G-2S+ with SFP S+31DLC10D connected via fiber.
Every some hours I get for 1-3 Minutes packet drops. Afterward it works completely fine again.
When this happens, the value ‘learn-failed-count’ increases.
I did exchange the complete hardware with no effect.
What could be the reason?
How can I fix it?
Thank you!
Here are the details:
[admin@Switch IT-Small] /interface ethernet> monitor 24 once
name: sfp-sfpplus1
status: link-ok
auto-negotiation: done
rate: 10Gbps
full-duplex: yes
tx-flow-control: no
rx-flow-control: no
advertising:
link-partner-advertising:
sfp-module-present: yes
sfp-rx-lose: no
sfp-tx-fault: no
sfp-connector-type: LC
sfp-link-length-9um: 10000m
sfp-vendor-name: Mikrotik
sfp-vendor-part-number: S+31DLC10D
sfp-vendor-revision: A
sfp-vendor-serial: SX31144200399
sfp-manufacturing-date: 14-10-21
sfp-wavelength: 1310nm
sfp-temperature: 35C
sfp-supply-voltage: 3.288V
sfp-tx-bias-current: 33mA
sfp-tx-power: -1dBm
sfp-rx-power: -4dBm
[admin@Switch IT-Small] /interface ethernet> print stats without-paging where name=sfp-sfpplus1
name: sfp-sfpplus1
driver-rx-byte: 0
driver-rx-packet: 0
driver-tx-byte: 0
driver-tx-packet: 0
rx-bytes: 48 372 961 952
rx-too-short: 0
rx-64: 1 130 748
rx-65-127: 14 463 087
rx-128-255: 4 129 229
rx-256-511: 1 347 221
rx-512-1023: 1 093 892
rx-1024-1518: 15 208 827
rx-1519-max: 15 450 606
rx-too-long: 10
rx-broadcast: 0
rx-pause: 0
rx-multicast: 0
rx-fcs-error: 0
rx-align-error: 0
rx-fragment: 0
rx-overflow: 0
tx-bytes: 14 874 093 178
tx-64: 3 752 085
tx-65-127: 20 701 672
tx-128-255: 4 689 516
tx-256-511: 1 109 737
tx-512-1023: 1 184 032
tx-1024-1518: 5 152 191
tx-1519-max: 2 565 105
tx-too-long: 0
tx-broadcast: 0
tx-pause: 0
tx-multicast: 0
tx-underrun: 0
tx-collision: 0
tx-excessive-collision: 0
tx-multiple-collision: 0
tx-single-collision: 0
tx-excessive-deferred: 0
tx-deferred: 0
tx-late-collision: 0
tx-queue0-packet: 2 463 504
tx-queue0-byte: 333 927 602
tx-queue1-packet: 36 484 430
tx-queue1-byte: 14 509 045 309
tx-queue2-packet: 206 404
tx-queue2-byte: 31 120 267
tx-queue3-packet: 0
tx-queue3-byte: 0
tx-queue4-packet: 0
tx-queue4-byte: 0
tx-queue5-packet: 0
tx-queue5-byte: 0
tx-queue6-packet: 0
tx-queue6-byte: 0
tx-queue7-packet: 0
tx-queue7-byte: 0
tx-all-queue-drop-packet: 0
tx-all-queue-drop-byte: 0
tx-queue-custom0-drop-packet: 0
tx-queue-custom0-drop-byte: 0
tx-queue-custom1-drop-packet: 0
tx-queue-custom1-drop-byte: 0
policy-drop-packet: 0
custom-drop-packet: 0
current-learned-count: 270
learn-failed-count: 4 067
[admin@Switch IT-Small] /interface ethernet switch port> print detail where name=sfp-sfpplus1
Flags: I - invalid
0 name=“sfp-sfpplus1” ingress-customer-tpid=0x8100 egress-customer-tpid=0x8100 ingress-service-tpid=0x88A8
egress-service-tpid=0x88A8 learn=yes drop-secure-static-mac-move=no drop-dynamic-mac-move=no learn-limit=1023
allow-unicast-loopback=no allow-multicast-loopback=no action-on-static-station-move=forward drop-when-ufdb-entry-src-drop=yes
isolation-leakage-profile=29 vlan-type=network-port allow-fdb-based-vlan-translate=no
allow-mac-based-service-vlan-assignment-for=all allow-mac-based-customer-vlan-assignment-for=all filter-untagged-frame=no
filter-priority-tagged-frame=no filter-tagged-frame=no egress-vlan-tag-table-lookup-key=egress-vid egress-vlan-mode=unmodified
ingress-mirror-to=none ingress-mirroring-according-to-vlan=no egress-mirror-to=none
qos-scheme-precedence=ingress-acl-based,sa-based,da-based,dscp-based,protocol-based,vlan-based,pcp-based default-customer-pcp=0
default-service-pcp=0 pcp-propagation-for-initial-pcp=no egress-pcp-propagation=no dscp-based-qos-dscp-to-dscp-mapping=yes
pcp-or-dscp-based-qos-change-dei=no pcp-or-dscp-based-qos-change-pcp=no pcp-or-dscp-based-qos-change-dscp=no
pcp-based-qos-drop-precedence-mapping=0-15:green pcp-based-qos-dscp-mapping=0-15:0 pcp-based-qos-dei-mapping=0-15:0
pcp-based-qos-pcp-mapping=0-15:0 pcp-based-qos-priority-mapping=0-15:0 priority-to-queue=0-15:0,1:1,2:2,3:3
per-queue-scheduling=wrr-group0:1,wrr-group0:2,wrr-group0:4,wrr-group0:8,wrr-group0:16,wrr-group0:32,wrr-group0:64,wrr-
group0:128
custom-drop-counter-includes=“” queue-custom-drop-counter0-includes=“” queue-custom-drop-counter1-includes=“”
policy-drop-counter-includes=“”
Best regards,
Christian Fischbach