Configuring Disconnect Cause Information; Generating The Disconnect Cause Avp Globally - Juniper JUNOSE 11.1.X - BROADBAND ACCESS CONFIGURATION GUIDE 6-4-2010 Configuration Manual

JUNOSe 11.1.x Broadband Access Configuration Guide
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Configuring Disconnect Cause Information

You can configure an E Series LNS to convey PPP-related disconnect cause information
to its L2TP peer. Enabling an LNS to send disconnect cause information to an LAC
is particularly useful in an environment where the LAC initiates tunnels without a
client's request, knowledge, or approval. In this type of environment, all PPP signaling
for the tunnel session takes place between the LNS and the client, without active
participation of the LAC. As a result, the LAC is not aware of the reason that a session
has disconnected.
NOTE: An E Series LAC does not send PPP Disconnect Case Code AVPs to an LNS.
In the event that a third-party LAC does send the AVP to an E Series LNS, the LNS
discards the AVP.
1. Generating the Disconnect Cause AVP Globally on page 386
2. Generating the Disconnect Cause AVP with a Host Profile on page 387
3. Enabling RADIUS Accounting for Disconnect Cause on page 387
4. Displaying Disconnect Cause Statistics on page 387

Generating the Disconnect Cause AVP Globally

You use the l2tp disconnect-cause command to specify that the LNS include the
PPP Disconnect Cause Code AVP in all L2TP Call-Disconnect-Notify (CDN) messages
that it sends to the LAC. For example, this feature enables the LAC to obtain
information about the cause of a session disconnection,
386
Configuring Disconnect Cause Information
Configure drain timeout operations, which control the amount of time a
disconnected LAC tunnel waits before restarting after receiving a restart request.
Configure how many times the router retries a transmission if the initial attempt
is unsuccessful.
Generating UDP Checksums in Packets to L2TP Peers on page 345
Specifying a Destruct Timeout for L2TP Tunnels and Sessions on page 345
Preventing Creation of New Destinations, Tunnels, and Sessions on page 346
Shutting Down Destinations, Tunnels, and Sessions on page 348
Specifying the Number of Retransmission Attempts on page 349
To enable disconnect cause generation chassis-wide on the LNS:
host1(config)#l2tp disconnect-cause