Wireless - Meraki Reason codes

[Raphael_L]

Hi ,

Does anyone know if Meraki is disclosing it's proprietary reason codes ?

802.11 reason codes are already available through the IEEE ( as mentioned in the documentation below )

https://documentation.meraki.com/MR/Monitoring_and_Reporting/Common_Wireless_Event_Log_Messages

Here is an example of a reason code from Meraki :

Also , I think that Meraki is not using the IEEE reason code description/id correctly ...

53 = MESH-MAX-PEERS : The mesh STA has reached the supported maximum number of
peer mesh STAs

49 = REASON_INVALID_PMKID : Invalid pairwise master key identifier (PMKID)

8: LEAVING_NETWORK_DISASSOC : Disassociated because sending STA is leaving (or has left)
BSS

Or Am I misinterpreting the IEEE documents ? Edit :Yes I was.

Thanks ,

[aleabrahao]

Meraki is correct, here is this part of the IEEE table:

Association status codes

Status code Meaning

0	Successful
1	Unspecified failure
2	Tunneled direct link setup (TDLS) wakeup schedule rejected but alternative schedule provided
3	TDLS wakeup schedule rejected
5	Security disabled
6	Unacceptable lifetime
7	Not in same basic service set (BSS)
10	Can't support all requested capabilities in capability information field
11	Reassociation denied due to inability to confirm that association exists
12	Association denied due to reason outside scope of this standard
13	Responding station doesn't support specified authentication algorithm
14	Received authentication frame with authentication transaction sequence number out of expected sequence
15	Authentication rejected because of challenge failure
16	Authentication rejected due to timeout waiting for next frame in sequence
17	Association denied because AP unable to handle additional associated stations
18	Association denied due to requesting station not supporting all data rates in the BSSBasicRateSet parameter, where BSS refers to basic service set
19	Association denied due to requesting station not supporting short preamble option
20	Association denied due to requesting station not supporting packet binary convolutional code (PBCC) modulation option
21	Association denied due to requesting station not supporting channel agility option
22	Association request rejected because spectrum management capability required
23	Association request rejected because of unacceptable information in the power capability element
24	Association request rejected because of unacceptable information in the supported channels element
25	Association denied due to requesting station not supporting short slot time option
26	Association denied due to requesting station not supporting direct sequence spread spectrum orthogonal frequency division multiplexing (DSSS-OFDM) option
27	Association denied because requesting station doesn't support high throughput (HT) features
28	Pairwise master key (PMK-R0) Key Holder (R0KH) unreachable
29	Association denied because requesting station doesn't support phased coexistence operation (PCO) transition time required by the AP
30	Association request rejected temporarily; try again later
31	Robust management frame policy violation
32	Unspecified. Quality of service (QoS)-related failure
33	Association denied because QoS AP has insufficient bandwidth to handle another QoS station
34	Association denied due to excessive frame loss rates or poor conditions on current operating channel, or both
35	Association (with QoS BSS) denied because the requesting station does not support the QoS facility
37	Request declined
38	Request not successful as one or more parameters have invalid values
39	Traffic stream (TS) not created because request can't be honored; however, suggested traffic specification (TSPEC) provided so that the initiating station may attempt to set another TS with suggested changes to TSPEC
40	Invalid information element (doesn't follow 802.11 standard)
41	Invalid group cipher
42	Invalid pairwise cipher
43	Invalid authentication and key management protocol (AKMP)
44	Unsupported robust security network element (RSNE) information element version
45	Invalid RSNE information element capabilities
46	Cipher suite rejected because of security policy
47	TS not created; however, hybrid coordinator (HC) may be capable of creating TS, in response to a request, after the time indicated in TS delay element
48	Direct link not allowed in the BSS by policy
49	Destination station not present within this BSS
50	Destination station not a QoS station
51	Association denied because ListenInterval too large
52	Invalid fast transition (FT) action frame count
53	Invalid shared key (pairwise master key identifier or PMKID)

[Raphael_L]

Source ?

[aleabrahao]

https://support.google.com/chrome/a/answer/7172038?hl=en#zippy=%2Cassociation-status-codes

[Raphael_L]

Edit : The full list of specified 802.11 reason codes can be found in IEEE's documentation in this article (requires account) under "Table 9-49—Reason codes" in section "9.4.1.7 Reason Code field".

So I was only focusing on section 9.4.1.7 ( de-auth ) , but my codes are in the section 9.4.1.9 ( auth ).

My first question is still valid.

[aleabrahao]

Ok, but reason code 53 is association, in this case.

[Raphael_L]

That's what I said.

Logs are Auth/Assoc

So I was only focusing on section 9.4.1.7 ( de-auth ) , but my codes are in the section 9.4.1.9 ( auth ).

[Rasmus Hoffmann Birkelund]

I can't exactly say what Reason 103 is, but according to StackExchange , it could have something to do with the re-keying process, where the client is sending an M2 with what the AP considers a MIC error. Reducing the EAPoL timeourt might do the trick.

[Raphael_L]

Makes sense that Meraki would re-use codes from Cisco's WLC.

Those '103' started to appear out of nowhere.

[Raphael_L]

I was able to capture it. I'm not an expert on that field at all. But it seems you were right with the M2. I can see a couple a 'retry' then finaly M2,M4 and the client is auth again :

Rollbacking to MR28.X fixes the issue. Weird. I will update my ticket

[Rasmus Hoffmann Birkelund]

But it still doesn't change the fact the there is still no documentation on the Meraki proprietory reason codes, as well as detailed information on what they mean/are caused. 🙂

[Raphael_L]

Exactly 🙂 That would be so usefull !