Radius Snoop Mode - Cisco ASR 5000 Administration Manual
Ip services gateway
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Also See for ASR 5000:
- Administration manual (466 pages) ,
- Installation manual (294 pages) ,
- Installation procedure (8 pages)
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▀ How it Works
Figure 2.
RADIUS Snoop Mode
When configured in RADIUS snoop mode, the IPSG simply inspects RADIUS accounting request packets sent to a
RADIUS server through the IPSG.
As shown in the following figure, the IPSG has three reference points: sn, si, and sr. The sn interface transmits/receives
data packets to/from the access gateway (GGSN, HA, PDSN, etc.). The si interface transmits/receives data packets
to/from the Internet or a packet data network. The sr interface receives RADIUS accounting requests from the access
gateway. The system inspects the accounting request packets and extracts information to be used to determine the
appropriate service(s) to apply to the flow. Information is not extracted from the RADIUS accounting responses so they
are sent directly to the access gateway by the RADIUS Server, but can also be sent back through the IPSG.
Figure 3.
▄ Cisco ASR 5000 IP Services Gateway Administration Guide
14
IPSG Message/Data Flow (RADIUS Server Mode - RADIUS Proxy)
IPSG Message/Data Flow (RADIUS Snoop Mode)
IP Services Gateway Overview
OL-27210-02
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