Each Tunnel Concentrator instance supports up to 5,000 tunnels. If
you deploy High Availability (HA) pairs, the 5,000 tunnel limit applies to the
HA pair.
Each Universal Compute Platform 4120C host can support up
to three Tunnel Concentrator instances with a maximum of
15,000 tunnels per host.
Tunnel Concentrator supports GRE tunneling
(with IPSec encryption) only between wireless access points and Tunnel Concentrator. Note that IPSec is supported only if you deploy ExtremeCloud IQ Controller as the management
application.
Tunnel Concentrator does not support the use of a NAT router between the access point and Tunnel Concentrator.
Tunnel Concentrator preserves DSCP markings for both upstream and downstream direction.
Tunnel Concentrator blocks all broadcasts (except DHCP and ARP).
Tunnel Concentrator does not support the use of LAG interfaces on the Universal Compute Platform.
IPSec is supported only with APs that are managed by ExtremeCloud IQ Controller.