Specifications

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zones enable seamless roaming across a large number of
wireless appliances while still delivering real-time session-
availability services without requiring the purchase of
additional AP licenses for redundancy.
ExtremeWireless provides true end-to-end Quality of
Service (QoS) with each appliance and AP supporting
native IP prioritization (DiServ, TOS, Precedence), Ethernet
802.1p, as well as 802.11e’s WMM and TSPEC wireless QoS
standards.ExtremeWireless devices support distinct queues
on all interfaces, whether wired or wireless.
When voice and data trac are running on the same AP,
voice trac can be prioritized to ensure minimal delay and
jitter for optimal voice quality. The wireless appliances are
able to translate WMM prioritized trac to existing QoS
prioritization schemes on the wired network (TOS,
DSCP, etc.).
Fast and Secure Roaming for Seamless Voice and
Data Mobility
ExtremeWireless Appliances manage sessions centrally
to ensure fast, secure, and seamless roaming as users and
devices move across the campus. Seamless roaming greatly
improves productivity by providing true mobility across the
enterprise, all transparent to the user.
The Wireless Appliances use industry standards to deliver
fast and secure roaming. 802.11i pre-authentication
(Pre-Auth), 802.11r and 802.11k ensure that the user is
authenticated to adjacent APs before entering their
coverage range, preserving voice calls as users move
throughout the enterprise. Opportunistic Key Caching
(OKC) is also a supported mechanism which greatly
improves device roaming times for legacy devices.
High Availability and Self-Healing
Redundant ExtremeWireless Appliances can be deployed
across the network and operate in failover or load sharing
mode. Access points can be configured for fast-failover
mode to allow configuration and service restoration (in
tunnel mode) in less than two seconds, thus enabling user
sessions to continue uninterrupted. When switching trac
locally, APs continue to provide service even when the link
to the wireless appliance is severed and can be configured
to resume service should a power outage force them to
restart.
ExtremeWireless APs also feature Dynamic Radio
Management, which enables the network to automatically
adapt to changes in the RF environment or failure of any
individual APs, ensuring availability and performance to
users. Each wireless AP continuously monitors channel use,
signal to noise ratio (SNR) for interference, and the receive
power of neighboring APs (ExtremeWireless or third party)
to adjust their channel and transmit power.
Supported Features
C35 C5210 C5215
Capacity
Total APs supported per appliance 250 2,000 2,000
Total APs supported in standard mode 125 1,000 1,000
Additional APs supported in high-availability mode 125 1,000 1,000
Total simultaneous users per appliance 4,000 32,000 32,000
Total simultaneous users in standard mode 2,000 16,000 16,000
Additional simultaneous users in high-availability mode 2,000 16,000 16,000
Manageability
Pre-standard (CAPWAP)
✓ ✓ ✓
Integrated VLAN-VNS
✓ ✓ ✓
Auto-discovery of new APs
✓ ✓ ✓
CDR/RADIUS accounting
✓ ✓ ✓
Visibility through Extreme Control Center
✓ ✓ ✓
Integration with Extreme Identity and Access Control
✓ ✓ ✓
Integration with ExtremeSecurity
✓ ✓ ✓
ExtremeWireless Appliances