Poor Connectivity to Meraki Cloud

[CWK_Rob]

Hi guys!

I've got one switch in my network that is repeatedly having trouble communicating with Meraki Cloud.  I had things working last night for about 6 hours, but then the trouble started again.  Traffic is passing OK, and I can see the Layer 2 switch behind this (troublesome) layer 3 switch. The layer 3 switch is constantly amber.

The switch is on the far-end of a Transit Network (leased layer 2 line from ISP).  When I take a packet capture from the near-end switch port of the transit network I get the following:

17:24:04.649233 IP 10.100.200.229.58811 > 52.84.235.30.80: Flags [S], seq 247871360, win 29200, options [mss 1460,sackOK,TS val 6177911 ecr 0,nop,wscale 7], length 0
17:24:04.667300 IP 52.84.235.30.80 > 10.100.200.229.58811: Flags [S.], seq 2507373319, ack 247871361, win 28960, options [mss 1460,sackOK,TS val 2705000754 ecr 6177811,nop,wscale 8], length 0
17:24:04.670938 IP 52.84.235.30.80 > 10.100.200.229.58811: Flags [S.], seq 2507373319, ack 247871361, win 28960, options [mss 1460,sackOK,TS val 2705000754 ecr 6177811,nop,wscale 8], length 0
17:24:05.443512 IP 10.100.200.229 > 8.8.8.8: ICMP echo request, id 11207, seq 61547, length 64
17:24:05.462298 IP 8.8.8.8 > 10.100.200.229: ICMP echo reply, id 11207, seq 61547, length 64
17:24:05.463253 IP 8.8.8.8 > 10.100.200.229: ICMP echo reply, id 11207, seq 61547, length 64
17:24:05.463434 IP 8.8.8.8 > 10.100.200.229: ICMP echo reply, id 11207, seq 61547, length 64
17:24:05.463626 IP 8.8.8.8 > 10.100.200.229: ICMP echo reply, id 11207, seq 61547, length 64
17:24:05.463802 IP 8.8.8.8 > 10.100.200.229: ICMP echo reply, id 11207, seq 61547, length 64
17:24:05.464321 IP 8.8.8.8 > 10.100.200.229: ICMP echo reply, id 11207, seq 61547, length 64
17:24:05.464502 IP 8.8.8.8 > 10.100.200.229: ICMP echo reply, id 11207, seq 61547, length 64
17:24:05.465287 IP 8.8.8.8 > 10.100.200.229: ICMP echo reply, id 11207, seq 61547, length 64
17:24:05.465475 IP 8.8.8.8 > 10.100.200.229: ICMP echo reply, id 11207, seq 61547, length 64
17:24:05.465904 IP 8.8.8.8 > 10.100.200.229: ICMP echo reply, id 11207, seq 61547, length 64
17:24:05.466200 IP 8.8.8.8 > 10.100.200.229: ICMP echo reply, id 11207, seq 61547, length 64
17:24:05.466552 IP 8.8.8.8 > 10.100.200.229: ICMP echo reply, id 11207, seq 61547, length 64
17:24:05.466727 IP 8.8.8.8 > 10.100.200.229: ICMP echo reply, id 11207, seq 61547, length 64
17:24:05.467444 IP 8.8.8.8 > 10.100.200.229: ICMP echo reply, id 11207, seq 61547, length 64
17:24:05.467627 IP 8.8.8.8 > 10.100.200.229: ICMP echo reply, id 11207, seq 61547, length 64
17:24:05.467920 IP 8.8.8.8 > 10.100.200.229: ICMP echo reply, id 11207, seq 61547, length 64
17:24:05.468108 IP 8.8.8.8 > 10.100.200.229: ICMP echo reply, id 11207, seq 61547, length 64
17:24:05.468657 IP 8.8.8.8 > 10.100.200.229: ICMP echo reply, id 11207, seq 61547, length 64
17:24:05.468835 IP 8.8.8.8 > 10.100.200.229: ICMP echo reply, id 11207, seq 61547, length 64
17:24:05.469376 IP 8.8.8.8 > 10.100.200.229: ICMP echo reply, id 11207, seq 61547, length 64
17:24:05.469553 IP 8.8.8.8 > 10.100.200.229: ICMP echo reply, id 11207, seq 61547, length 64
17:24:05.470083 IP 8.8.8.8 > 10.100.200.229: ICMP echo reply, id 11207, seq 61547, length 64
17:24:05.470272 IP 8.8.8.8 > 10.100.200.229: ICMP echo reply, id 11207, seq 61547, length 64
17:24:05.470832 IP 8.8.8.8 > 10.100.200.229: ICMP echo reply, id 11207, seq 61547, length 64
17:24:05.471160 IP 8.8.8.8 > 10.100.200.229: ICMP echo reply, id 11207, seq 61547, length 64
17:24:05.471555 IP 8.8.8.8 > 10.100.200.229: ICMP echo reply, id 11207, seq 61547, length 64
17:24:05.471742 IP 8.8.8.8 > 10.100.200.229: ICMP echo reply, id 11207, seq 61547, length 64
17:24:05.472384 IP 8.8.8.8 > 10.100.200.229: ICMP echo reply, id 11207, seq 61547, length 64
17:24:05.472567 IP 8.8.8.8 > 10.100.200.229: ICMP echo reply, id 11207, seq 61547, length 64
17:24:05.473044 IP 8.8.8.8 > 10.100.200.229: ICMP echo reply, id 11207, seq 61547, length 64
17:24:05.473234 IP 8.8.8.8 > 10.100.200.229: ICMP echo reply, id 11207, seq 61547, length 64
17:24:05.473841 IP 8.8.8.8 > 10.100.200.229: ICMP echo reply, id 11207, seq 61547, length 64
17:24:05.474117 IP 8.8.8.8 > 10.100.200.229: ICMP echo reply, id 11207, seq 61547, length 64
17:24:05.474620 IP 8.8.8.8 > 10.100.200.229: ICMP echo reply, id 11207, seq 61547, length 64
17:24:05.474803 IP 8.8.8.8 > 10.100.200.229: ICMP echo reply, id 11207, seq 61547, length 64
17:24:05.475308 IP 8.8.8.8 > 10.100.200.229: ICMP echo reply, id 11207, seq 61547, length 64
17:24:05.475498 IP 8.8.8.8 > 10.100.200.229: ICMP echo reply, id 11207, seq 61547, length 64
17:24:05.476162 IP 8.8.8.8 > 10.100.200.229: ICMP echo reply, id 11207, seq 61547, length 64
17:24:05.674419 IP 52.84.235.30.80 > 10.100.200.229.58811: Flags [S.], seq 2507373319, ack 247871361, win 28960, options [mss 1460,sackOK,TS val 2705000854 ecr 6177811,nop,wscale 8], length 0
17:24:05.675155 IP 52.84.235.30.80 > 10.100.200.229.58811: Flags [S.], seq 2507373319, ack 247871361, win 28960, options [mss 1460,sackOK,TS val 2705000854 ecr 6177811,nop,wscale 8], length 0

It looks like the ICMP request is sent, but the reply repeats.  Last night when I left (thinking everything was working) I was getting a 1:1 ratio of request/reply.

Any hints?

[PhilipDAth]

I'd contact the service provider.  You might have a faulty circuit.

[BlakeRichardson]

Looks like a loop maybe, is everything else on that connection behvaing as expected?

[CWK_Rob]

Yes, everything else is behaving as expected.  I have a layer 2 switch 'behind' my layer 3 and it is communicating with dashboard fine.  All end-user devices are behaving fine.

I opened a support case and so far the engineers are stumped as well.

[PhilipDAth]

Perhaps try changing the layer 2 switch management IP address in case their is an IP address conflict or something.

[CWK_Rob]

I gave that a try. No luck. The address of the layer 2 switch changed OK, but everything else is still the same.

[gauravgupta]

Hi,

Make sure that default gateway of switch's management IP is not defined as SVI of management VLAN on itself.

Cheers,

Gaurav