Juniper JUNOSE 11.0.X MULTICAST ROUTING, Руководство по настройке

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Figure 10: Network Model for Dial-Out
NOTE: The dial-out feature exists in the LNS only. It does not exist in the LAC.
Terms
Table 73 on page 406 describes key terms used in L2TP dial-out.
Table 73: L2TP Dial-Out Terms
Description Term
IP packet that initiates a dial-out session Dial-out trigger
Control entity for a triggered IP flow used to manage the establishment of
an associated L2TP session for dial-out Dial-out session
A virtual router context and an IP address prefix, for which the arrival of
an IP packet (a dial-out trigger) initiates a dial-out session. Dial-out target
Contains the dial-out target, as well as a domain name and profile.
■
The domain name is used in the initial Access-Request message.
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The profile is used to create the IP/Point-to-Point Protocol (PPP) stack
for the dial-out session.
Dial-out route
Network Model for Dial-Out
In Figure 10 on page 406, the home site connects to the Internet over a permanent
leased line to the Internet service provider’s (ISP’s) E Series LNS. The ISP uses an IP
network to connect the LNS to the narrowband access point of the network where
the narrowband LAC exists. The narrowband LAC connects to a narrowband network
(ISDN) that the remote site is also connected to.
The figure shows three RADIUS servers. The home site maintains the home server,
and the other two servers are at the LNS and the LAC. The router accesses the home
and LNS RADIUS servers. (The separation of the RADIUS servers is transparent to
the router.)
Before any attempts at connectivity can take place from the home site to the remote
site, an administrator must configure a dial-out route on the router. This route directs
406 ■
L2TP Dial-Out Overview
JUNOSe 11.0.x Broadband Access Configuration Guide