Remote Peer Scenarios During Negotiation Of Ppp Options - Juniper JUNOSE SOFTWARE FOR E SERIES 11.3.X - LINK LAYER CONFIGURATION GUIDE 2010-10-13 Configuration Manual

Remote Peer Scenarios During Negotiation of PPP Options

Copyright © 2010, Juniper Networks, Inc.
If the server fragments the packet to a larger size than specified by the attribute, then
JunosE drops the packet, because the E Series router acts as a pass-through device
and is not involved in the authentication method's fragmentation and reassembly
mechanisms.
On the other hand, if the EAP server fragments the EAP packet to a smaller size than
specified by the attribute, then performance decreases because of the increased
number of smaller packets that must be exchanged.
The EAP client on the peer must fragment the EAP packets to the size of the link MTU
on the E Series router. When it does not do so, performance can be affected.
During a PPP configuration request, if any of the primary or secondary DNS option is
rejected, or if they are unacceptable, the CPE (Customer Premises Equipment) is
prompted to negotiate the IPCP primary and secondary DNS options that are locally
available with the B-RAS (Broadband Remote Access Server). This provision is controlled
by CLI and SNMP configuration options.
The following describes the peer negotiations in different scenarios:
The CPE does not send the prompted options in the subsequent configure request
If B-RAS sends another NAK, it prompts the options again, until max configure-nak
is exceeded
If B-RAS sends an ACK, it ignores the options and brings up the link
The CPE negotiates a different option from the prompted options
If B-RAS sends another NAK, it prompts the options again, until max configure-nak
is exceeded
If B-RAS sends an ACK, it ignores the options and brings up the link
The CPE negotiates the prompted options but the option values are not acceptable
B-RAS sends another NAK with the prompted options, until max configure-nak is
exceeded
The CPE negotiates the prompted options but some option values are not acceptable
B-RAS sends a NAK for unacceptable options, until max configure-nak is exceeded
The CPE stops responding on receiving the prompted options
B-RAS negotiation timer expires and the link is terminated
The CPE negotiates the prompted option after the link comes up
This is treated as a renegotiation request and B-RAS sends an ACK/NAK until max
renegotiation and max configure-nak counters are exceeded, respectively
The CPE starts renegotiation without the prompted options
B-RAS renegotiates, until max renegotiation is exceeded
Chapter 8: Configuring Point-to-Point Protocol
267