R2511-HP MSR Router Series Layer 2 - WAN Command Reference(V5)

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Related commands
mandatory-lcp
mandatory-lcp
Use mandatory-lcp to force an LNS to perform LCP negotiation with users.
Use undo mandatory-lcp to disable the LCP negotiation.
Syntax
mandatory-lcp
undo mandatory-lcp
Default
An LNS does not perform LCP negotiation with users.
Views
L2TP group view
Default command level
2: System level
Usage guidelines
When you start a PPP session, a client of NAS-initialized VPN will first negotiate with the NAS for LCP
parameters. If the negotiation succeeds, the NAS initializes a tunnel and then transfers the negotiated
results to the LNS. Then the LNS verifies whether the client is valid, depending on the proxy authentication
information. You can use the mandatory-lcp command to force the LNS to perform LCP re-negotiation for
the client. In this case, the proxy authentication information of the NAS will be neglected. Some PPP
clients might not support LCP re-negotiation. In this case, the LCP re-negotiation will fail.
Examples
# Perform LCP negotiation by force.
<Sysname> system-view
[Sysname] l2tp-group 1
[Sysname-l2tp1] mandatory-lcp
Related commands
mandatory-chap
ppp lcp imsi accept
Use ppp lcp imsi accept to configure the client to accept LNS-initiated International Mobile Subscriber
Identity (IMSI) negotiation requests.
Use undo ppp lcp imsi accept to restore the default.
Syntax
ppp lcp imsi accept
undo ppp lcp imsi accept
Default
The client rejects LNS-initiated IMSI negotiation requests.