Juniper JUNOSE SOFTWARE 11.0.X - LINK LAYER CONFIGURATION GUIDE 4-1-2010 Configuration Manual page 565

ppp mru
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, dynamic
PPP or MLPPP interface columns are torn down and wait to be recreated when
traffic is detected on the interface.
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.
When both IPv4 interface columns and IPv6 interface columns are configured
over a PPP link-layer interface, the router terminates the PPP session only when
the PPP client exceeds the configured maximum number of renegotiation
attempts for both the IPv4 interface and the IPv6 interface.
Example 1 Sets the maximum number of LCP renegotiation attempts to 5
host1(config-profile)#ppp max-negotiations lcp 5
Example 2 Sets the maximum number of IPCP renegotiation attempts to 30
(the default)
host1(config-profile)#ppp max-negotiations ipcp
Example 3 Sets the maximum number of LCP, IPCP, and IPv6CP renegotiation
attempts to 15
host1(config-profile)#ppp max-negotiations 15
Example 4 Restores the maximum number of LCP, IPCP, and IPv6CP
renegotiation attempts to the default value, 30
host1(config-profile)#no ppp max-negotiations
Use the no version to restore the default value, 30 renegotiation attempts.
See ppp max-negotiations.
Use to control the negotiation of the maximum receive unit (MRU).
Specify the number of bytes, in the range 64–65535.
We recommend you coordinate this value with the network administrator on
the other end of the line.
If the value configured for the PPP MRU is greater than the value of the lower-layer
MRU minus the PPP header length, the router logs a warning message and uses
the lesser of the configured MRU value or the lower-layer MRU value minus the
PPP header length to negotiate the local MRU.
Chapter 15: Configuring Dynamic Interfaces
Configuring a Dynamic Interface from a Profile
535