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RADIUS-Based Mirroring Sequence of Events
Figure 20 shows the
sequence of events that take place during RADIUS-based mirroring.
The tables after the figure describe the events indicated by the numbers
and letters in the figure. Table 44 describes
the configuration process; Table 45 describes
the flow of traffic during a mirroring operation that is initiated
when the user logs in; and Table 46 describes
the flow of traffic when mirroring a user who is already logged in.
Figure 20: RADIUS-Based Packet Mirroring
To create a RADIUS-based packet-mirroring environment, you must complete
the processes listed in Table 44.
Table 44: Setting
Up the RADIUS-Based Packet-Mirroring Environment
|
Process
|
Description
|
|
A
|
The authorized individual requests packet mirroring of
the user’s traffic and configures the analyzer device to receive
mirrored traffic.
|
|
B
|
The ISP administration configures VSAs in the user’s
RADIUS record.
|
|
C
|
The E-series router administrator configures RADIUS server
information and the analyzer interface connection to the analyzer
device.
|
Table 45 indicates the sequence
of steps for a packet mirroring operation that takes place when a
user starts a new session.
Table 45: RADIUS-Based
Mirroring During Session Start (User-Initiated)
|
Step
|
Description
|
|
1
|
A user logs in to an E-series router, requesting authentication
by the RADIUS server. Attributres in the logon request are examined
to determine whether any match a configured trigger. The first match
starts the packet mirroring session for the user.
|
|
2
|
- The RADIUS server authenticates the user and sends packet
mirroring VSAs and any other configured VSAs to the router.
- The router creates a secure policy based on the VSAs and
starts mirroring the user’s traffic.
|
|
3
|
The router sends the user’s original traffic to
its intended destination.
|
|
4
|
The router sends the mirrored traffic to analyzer device.
|
|
5
|
The analyzer device provides information for the requesting
individual.
|
Table 46 indicates the sequence
of steps for a packet mirroring operation that is configured for a
currently running session.
Table 46: RADIUS-Based
Mirroring of Currently Running Session (RADIUS-Initiated)
|
Step
|
Description
|
|
1
|
A user logs in to the E-series router; no mirroring action
is configured.
|
|
2
|
- Packet mirroring is enabled on the RADIUS server.
- Authenticated users are examined to determine whether
any match a configured trigger. The first match initiates the router
to send change-of-authorization messages.
- The RADIUS server sends change-of-authorization messages
containing packet mirroring VSAs to the router.
- The router creates a secure policy based on the VSAs and
starts mirroring the user’s traffic.
|
|
3
|
The router sends the user’s original traffic to
its intended destination.
|
|
4
|
The router sends mirrored traffic to the analyzer device.
|
|
5
|
The analyzer device provides information for the requesting
individual.
|
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