Cisco Cisco IOS Software Release 12.2(18)SXE

GPRS Tunneling Protocol v1 (GTPv1)

Hypertext Transfer Protocol (HTTP)

Hypertext Transfer Protocol over Secure Socket Layer (HTTPS)

Internet Message Access Protocol (IMAP)

IP in IP Encapsulation (IPinIP)

Internet Key Exchange (IKE, was ISAKMP)

Mapping of Airline Traffic over IP, Type A (MATIP-A)

Network News Transport Protocol (NNTP)

Post Office Protocol, version 2 (POP2)

Post Office Protocol, version 3 (POP3)

RealAudio/RealVideo via RTSP

Remote Authentication Dial-In User Service (RADIUS)

Simple Mail Transport Protocol (SMTP)

Telnet

Transmission Control Protocol (TCP) and standard TCP protocols

User Datagram Protocol (UDP) and standard UDP protocols

X.25 over TCP (XOT)

Wireless Application Protocol (WAP), including:

Connectionless Secure WSP

Connectionless WSP

Connection-Oriented Secure WSP

Connection-Oriented WSP

IOS SLB provides RADIUS load-balancing capabilities for RADIUS authentication, authorization, and 
accounting (AAA) servers.

IOS SLB provides the following RADIUS load-balancing functions:

Balances RADIUS requests among available RADIUS servers and proxy servers.

Routes RADIUS request retransmissions (such as retransmissions of unanswered requests) to the 
same RADIUS server or proxy server as the original request.

Provides session-based automatic failure detection.

Supports both stateless backup and stateful backup.

In addition, IOS SLB can load-balance devices that proxy the RADIUS Authorization and Accounting 
flows in both traditional and mobile wireless networks. For more information, see the 

.

IOS SLB can balance RealAudio and RealVideo streams via Real-Time Streaming Protocol (RTSP), for 
servers running RealNetworks applications.