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Basic Multilink PPP configuration on Back-to-Back Juniper Firewalls with Multiple Serial Interfaces

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Article ID: KB11031 KB Last Updated: 24 Aug 2010Version: 4.0
Summary:
Basic configuration of MLPPP between two Juniper Firewalls
Symptoms:
Basic Multilink PPP configuration on Back-to-Back Juniper Firewalls with Multiple Serial Interfaces
Solution:
Topology:

[SSG-350] ml1-------ml1 [SSG-520]


SSG350 configuration:

set interface "ml1" zone "Untrust"
set interface "ml1" encap mlppp
set interface ml1 ip 1.0.0.1/30
set interface ml1 route
set ppp profile "MLPPP"
set ppp profile "MLPPP" static-ip
set interface "ml1" ppp profile MLPPP
set interface serial1/1 bundle ml1
set interface serial1/0 bundle ml1


SSG520 configuration:

set interface "ml1" zone "Untrust"
set interface "ml1" encap mlppp
set interface ml1 ip 1.0.0.2/30
set interface ml1 route
set interface serial6/0 serial-options clocking-mode internal
set interface serial6/1 serial-options clocking-mode internal
set ppp profile "MLPPP"
set ppp profile "MLPPP" static-ip
set interface "ml1" ppp profile MLPPP
set interface serial6/1 bundle ml1
set interface serial6/0 bundle ml1


To verify operation:

SSG350-> get int s1/0
Interface serial1/0:
description serial1/0
number 8, if_info 19264, if_index 0, encap mlppp, mode route
link up, link protocol up, phy-link up
holdtime: up 0 ms, down 0 ms
serial-options:
mode: dte

SSG520-> get interface serial6/0
Interface serial6/0:
description serial6/0
number 8, if_info 8064, if_index 0, encap mlppp, mode route
link up, link protocol up, phy-link up
holdtime: up 0 ms, down 0 ms
serial-options:
mode: dce
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