Juniper JUNOSE SOFTWARE FOR E SERIES 11.3.X - LINK LAYER CONFIGURATION GUIDE 2010-10-13 Configuration Manual page 348

JunosE 11.3.x Link Layer Configuration Guide
ppp magic-number ignore-mismatch
ppp max-negotiations
316
Use to disable negotiation of the local magic number. If issued in the context of an
individual interface, the command affects only that interface. If issued in the context
of an MLPPP bundle, the command affects all MLPPP link interfaces that are member
links of that bundle.
Issuing this command prevents the router from detecting loopback configurations.
Example
host1(config-if)#ppp magic-number disable
Use the no version to restore negotiation of the local magic number.
See ppp magic-number disable.
Use to cause the router to ignore a mismatch of the LCP peer magic number and retain
the PPP connection when the peer has not negotiated an LCP magic number.
For more information about using this command, see "Validation of LCP Peer Magic
Number" on page 261 in "Configuring Point-to-Point Protocol" on page 259.
To verify configuration of LCP peer magic number validation on the router, use the
show ppp interface mlppp command. For information, see "show ppp interface mlppp"
on page 332.
Example
host1(config-if)#ppp magic-number ignore-mismatch
Use the no version to restore the default behavior, in which the router terminates the
PPP connection if it detects an LCP peer magic number mismatch.
See ppp magic-number ignore-mismatch.
Use to configure the maximum number of LCP, IPCP, or IPv6CP renegotiation attempts,
in the range 1–65535, that the router accepts before terminating a PPP session.
Configuring the maximum number of renegotiation attempts helps avoid massive
renegotiation loops that can occur between the router and a noncompliant PPP client.
Such renegotiation loops can cause excessive CPU utilization and can prevent the PPP
client from coming up properly.
When a PPP client exceeds the configured maximum number of renegotation attempts,
the router sends a termination request to end the PPP session. When the PPP session
is terminated and LCP goes into a stopped (closed) state, static PPP or MLPPP
interfaces go into passive mode and wait for the other side of the connection to start
the LCP negotiation process.
If you do not specify the optional lcp, ipcp, or ipv6cp keyword, the ppp
max-negotiations command sets the maximum number of renegotiation attempts
for each of LCP, IPCP, and IPv6CP to the value you specify, or to the default value (30)
if you omit the optional value for maximum renegotiation attempts.
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