Release Notes

Extreme Campus Controller Customer Release Notes
12/16/2021 P/N: 9037154-02 Subject to Change Without Notice Page: 10 of 18
F0615-O
Known Restriction or Limitation I.D
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).
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
perform configuration changes to one of the members of a High-Availability pair
while the peer has a different software revision.
Info
nse0005086
For High-Availability configurations, during upgrade phases or configuration restore
operations, wait until the availability link is established and synchronized before
attempting to make any new configuration changes. The Availability status will only
re-establish to Synched status when both appliances are running the exact same
firmware revision.
During upgrade periods, the Availability link will only re-establish when both the
appliance status of availability link and synchronization status can be found.
Go to:
· “Network Health" widget on the Dashboard, or
· Administration -> System -> Availability
Info
ECA-776
Recommendation settings for setup of redundant RADIUS server authentication:
· Response Window to 5s [Default: 20s]
· Revival Interval to 10s [Default: 60s]
Info
ECA-875
SUPPORTED WEB BROWSERS
For Extreme Campus Controller management GUI, the following Web browsers were tested for interoperability:
• Firefox 81.0
• Google Chrome 86.0
Note: Microsoft IE browser is not supported for UI management.
The Wireless Clients (Captive Portal, AAA):