Release Notes

Extreme Campus Controller Customer Release Notes
11/23/2021 P/N: 9037076-03 Subject to Change Without Notice Page: 10 of 19
F0615-O
Known Restriction or Limitation
I.D
Several old Intel clients (i.e. Intel dual band Wireless AC – 7260) if they are using
old drivers are NOT seeing BSSID / SSID advertising 11x capability. This is a client
issue (forward compatibility). Other older clients may have this issue.
See:
[https://www.intel.com/content/www/us/en/support/articles/000054799/network-
and-i-o/wireless-networking.html|http://example.com]
See KB:
[https://gtacknowledge.extremenetworks.com/articles/Solution/AP510-Unable-to-
see-the-SSID-on-my-laptop|http://example.com]
NB – The client driver update must be done from Intel\drivers' site because the
Windows update reports that the client is running the latest driver.
If the client driver cannot be controlled (in a BYOD environment), then the AP
radios must be configured on a/n/ac (disable ax) until all clients will upgrade to the
latest driver.
Info
Default router/gateway should be configured with a next-hop associated with one of
the physical interfaces. Pointing the default route to the Admin interface will lead to
issues because access points will not get the correct services from the data plane.
We recommend setting the default route via data ports, and if necessary,
configuring static routes on the Admin port for administration level access.
Info
Before installing a new Extreme Campus Controller license, you must configure
Network Time Protocol (NTP) Server settings. Licensing management is
dependent on accurate NTP configuration. Configure NTP via the Extreme
Campus Controller initial Configuration Wizard, or go to Admin > System > Network
Time to configure and verify the NTP settings.
Info
For AP deployments in remote locations where access points and controllers may
need to be discovered and connected over firewalls, a best practice is to leverage
DNS or DHCP Option 60/43 methods for zero-touch-provisioning discovery. These
methods provide direct connectivity to the defined IP address. DHCP Option 78,
which refers to the controller as a Service Location Protocol – Directory Agent
(SLP- DA), requires the exchange of SLP protocol between the AP and the
appliance at the core, necessitating that UDP 427 be allowed by any firewall in the
path. For such installations, discovery over DHCP Option 78 assist is not
recommended.
When using SLP, for an AP to establish connection with a controller, it must first
exchange SLP Directory Agent registration before IPSEC establishment with the
eventual controller. That means that SLP UDP 427 must be open along the path.
Further issues can occur if Network Address Translation (NAT) is involved. While
this method is popular and widely deployed within a homogenous campus, it may
result in inadvertent complications for remote connections. Therefore, it should not
be used in favor of an alternate method (DHCP 60/43, DNS, or static override).
Info
When configuring system for NTP time assignment, ensure that the NTP server is
properly configured. Incorrect time settings (like timestamps far in the future) may
adversely affect system operation, such as certificate expiration that may trigger
failures in device registration or system instability.
Info
nse0003696
Appliances in a High-Availability pair must be of the same model and at the same
exact software revision (and time synched) for configuration synchronization to
propagate to the peer. During the upgrade process of a High-Availability pair, any
configuration changes made while only one appliance has been upgraded (and
therefore resulting in a version mismatch) will not be propagated until the peer is
correspondingly upgraded to the same revision. We recommend that you NOT
Info
nse0005086