SDA Wireless Connectivity Issues

[SEM68046]

We are running wired & wireless SDA at one of our facilities. Seems to work fairly well. In the last couple of months, we've been encountering some weird wireless connectivity issues. At completely random times, wireless appears to drop in random areas, impacting groups of clients for 2-5 min at a time. The APs do not appear to go offline. We've used Thousand Eyes to look at agents and it says unhealthy gateway. We've upgraded all of the switches and 9800 WLC to 17.15.4.d. We are not seeing anything in the logs. We've worked with Cisco TAC and setup multiple captures but TAC is not seeing anything. It is very intermittent and very hard to actually capture int he act. We are not seeing this type of issue on any other Traditional site, just at our SDA sight. We have a few SSIDs, but not too many, very good coverage with minimal overlap. We removed DFS channels and tuned down to 20mhz channels for a Vocera applicatin requirement. Has anyone seen anything like this at all and are there any recommendations.

[aleabrahao]

This is quite complicated because there are several possibilities.

If LISP mappings or RLOC connectivity fluctuate, clients may "lose network" even if the RF signal is working correctly.

In this case, check the following commands on the Fabric Edge:

show lisp session
show lisp eid-table vrf <vrf>
show lisp instance-id detail

Then look for Map-Server timeouts, RLOC flaps, and Registration drops.

[SEM68046]

We are running AP9164 aps, but I can check it

[SEM68046]

Cisco is suspecting bug: CSCwt19011. I am planning to install 17.15.4d APSP this week to possibly resolve this issue.

[CoryMatz]

We have the same issue, specifically with voceras. It was noticed when roaming from one access point on a switch to another access point on a different switch. We have been told a new release 17.15.5 APSP 2 will address this issue. 

[SEM68046]

Interesting. The devices I'm working with are stationary wireless desktops and laptops mostly, but we do have some "mysterious" issues with choppy vocera audio and hit and miss connectivity with EEG, EKGs, Ultrasounds and Xray devices with no network changes and excellent coverage. 17.15.4d APSP did nothing to resolve the very sporadic wireless issue. I may preset that version to TAC to get their thoughts. Thanks