Switch Constantly Pings 8.8.8.8

SOLVED
ph0t0g
Getting noticed

Switch Constantly Pings 8.8.8.8

I was running a packet capture on a MS220-8p's uplink port and discovered that the switches IP was constantly pinging the google dns server 8.8.8.8. I can see no reason for this. Any ideas?

 

17:08:05.873574 IP 172.16.1.202 > 8.8.8.8: ICMP echo request, id 38582, seq 8257, length 64
17:08:05.885341 IP 8.8.8.8 > 172.16.1.202: ICMP echo reply, id 38582, seq 8257, length 64
17:08:06.873886 IP 172.16.1.202 > 8.8.8.8: ICMP echo request, id 38582, seq 8258, length 64
17:08:06.884531 IP 8.8.8.8 > 172.16.1.202: ICMP echo reply, id 38582, seq 8258, length 64
17:08:07.874352 IP 172.16.1.202 > 8.8.8.8: ICMP echo request, id 38582, seq 8259, length 64
17:08:07.885525 IP 8.8.8.8 > 172.16.1.202: ICMP echo reply, id 38582, seq 8259, length 64
17:08:08.874992 IP 172.16.1.202 > 8.8.8.8: ICMP echo request, id 38582, seq 8260, length 64
17:08:08.886283 IP 8.8.8.8 > 172.16.1.202: ICMP echo reply, id 38582, seq 8260, length 64
17:08:09.875136 IP 172.16.1.202 > 8.8.8.8: ICMP echo request, id 38582, seq 8261, length 64
17:08:09.886267 IP 8.8.8.8 > 172.16.1.202: ICMP echo reply, id 38582, seq 8261, length 64
17:08:10.875321 IP 172.16.1.202 > 8.8.8.8: ICMP echo request, id 38582, seq 8262, length 64
17:08:10.886453 IP 8.8.8.8 > 172.16.1.202: ICMP echo reply, id 38582, seq 8262, length 64

1 ACCEPTED SOLUTION
jdsilva
Kind of a big deal

Yup, @BrandonS has it right. It's part of the connectivity check that all Meraki products do. You cannot turn it off. 

View solution in original post

7 REPLIES 7
BrandonS
Kind of a big deal

I am pretty sure that is just part of the normal connectivity testing al Meraki products do.

 

This is for MX, but probably similar for MS, etc. https://documentation.meraki.com/MX/Firewall_and_Traffic_Shaping/Connection_Monitoring_for_WAN_Failo...

- Ex community all-star (⌐⊙_⊙)
jdsilva
Kind of a big deal

Yup, @BrandonS has it right. It's part of the connectivity check that all Meraki products do. You cannot turn it off. 

ph0t0g
Getting noticed

Oh, OK. So it's just E.T. phoning home. Thx

BrandonS
Kind of a big deal


@ph0t0g wrote:

Oh, OK. So it's just E.T. phoning home. Thx


Haha.  Does anyone here remember ROLM?  I used to have a bumper sticker back in the 80's that said, "E.T. phone ROLM"

- Ex community all-star (⌐⊙_⊙)

I used to work at a nuclear power plant that migrated from ROLM to Cisco VOIP. Funny bumper sticker but probably doesn't translate to 2018 very well. 🙂

FelixWong
Getting noticed

Today I experienced slow internet connection at one of my managed sites.

 

Then I found that there was a large amount of pings being sent from my switch.  


The ping size to Google DNS went up to 70MB at its peak!  


I restarted the switch but the ping would start to accumulate again.  From 84B it is slowly accumulating till it reaches its peak.  

 

I have been trying to get on the phone with Meraki Tech Support but no one is answering.

 

 

Do you mean 70Mb/sec? If so, that is a different issue then I experienced. My "background" data usage is around 0.5Kb/sec.

 

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