OSPF Configuration Guidelines

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To configure Open Shortest Path First version 2 (OSPF), you include the following statements:



protocols {



ospf {

disable;

export [ policy-names ];

external-preference preference;



graceful-restart {
disable;
helper-disable;
notify-duration seconds;
restart-duration seconds;
}



import [ policy-names ];

no-nssa-abr;

no-rfc-1583;



overload {
timeout seconds;
}



preference preference;

prefix-export-limit;

rib-group group-name;

reference-bandwidth reference-bandwidth;



sham-link {
local address;
}





spf-options {
delay milliseconds;
rapid-runs number;
holddown milliseconds;
}





traffic-engineering {
advertise-unnumbered-interfaces;
multicast-rpf-routes;
no-topology;



shortcuts {

ignore-lsp-metrics;

lsp-metric-into-summary;
}


}





traceoptions {
file filename <files number> <size size> <world-readable |
no-world-readable>;
flag flag <flag-modifier> <disable>;
}





area area-id {

area-range network/mask-length <restrict> <exact> <override-metric metric>;



interface interface-name {

disable;



authentication {



md5 key-id {
key [ key-values ];
start-time time;
}



simple-password key;
}





bfd-liveness-detection {


detection-time {
threshold milliseconds;
}


minimum-interval milliseconds;
minimum-receive-interval milliseconds;
multiplier number;
no-adaptation;


transmit-interval {
threshold milliseconds;
minimum-interval milliseconds;
}


version (1 | automatic);
}



dead-interval seconds;

demand-circuit;

hello-interval seconds;

interface-type type;

ipsec-sa name;



ldp-synchronization {
disable;
hold-time seconds;
}



metric metric;

neighbor address <eligible>;



passive {



traffic-engineering {
remote-node-id address;
}


}



poll-interval seconds;

priority number;

retransmit-interval seconds;

secondary;

te-metric metric;



topology (ipv4-multicast
| name) {
metric metric;
}



transit-delay seconds;
}



label-switched-path name metric metric;

network-summary-export [ policy-names ];

network-summary-import [policy-names ];



nssa {

area-range network/mask-length <restrict> <exact> <override-metric metric>;



default-lsa {

default-metric metric;

metric-type type;

type-7;
}


(summaries | no-summaries);
}





peer-interface interface-name {

disable;

dead-interval seconds;

demand-circuit;

hello-interval seconds;

retransmit-interval seconds;

transit-delay seconds;
}





sham-link-remote address {

demand-circuit;

ipsec-sa name;

metric metric;
}


}



stub <default-metric metric> <summaries | no-summaries>;



virtual-link neighbor-id router-id transit-area area-id {

disable;



authentication {



md5 key-id {
key [ key-values ];
}



simple-password key;
}



dead-interval seconds;

demand-circuit;

hello-interval seconds;

ipsec-sa name;

retransmit-interval seconds;

topology (ipv4-multicast
| name) disable;

transit-delay seconds;
}


}


}

For a list of hierarchy levels at which you can include these statements, see the statement summary sections for these statements.

To configure OSPF version 3 (OSPFv3), you include the following statements:



protocols {



ospf3 {

disable;

export [ policy-names ];

external-preference preference;



graceful-restart {
disable;
helper-disable;
notify-duration seconds;
restart-duration seconds;
}



import [ policy-names ];



overload {
timeout seconds;
}



preference preference;

prefix-export-limit;

reference-bandwidth reference-bandwidth;

realm (ipv4-unicast | ipv4-multicast
| ipv6-multicast);

rib-group group-name;



spf-options {
delay milliseconds;
holddown milliseconds;
rapid-runs number;
}





traceoptions {
file filename <files number> <size size> <world-readable |
no-world-readable>;
flag flag <flag-modifier> <disable>;
}





area area-id {

area-range network/mask-length <restrict> <exact> <override-metric metric>;



interface interface-name {



bfd-liveness-detection {


detection-time {
threshold milliseconds;
}


minimum-interval milliseconds;
minimum-receive-interval milliseconds;
multiplier number;
no-adaptation;


transmit-interval {
threshold milliseconds;
minimum-interval milliseconds;
}


version (1 | automatic);
}



disable;

dead-interval seconds;

hello-interval seconds;

ipsec-sa name;

metric metric;



passive {



traffic-engineering {
remote-node-id address;
}


}



priority number;

retransmit-interval seconds;

transit-delay seconds;
}



inter-area-prefix-export policy-name;

inter-area-prefix-import policy-name;



nssa {

area-range network/mask-length <restrict> <exact> <override-metric metric>;



default-lsa {

default-metric metric;

metric-type type;

type-7;
}


(no-summaries | summaries);
}



stub <default-metric metric> <summaries | no-summaries>;



virtual-link neighbor-id router-id transit-area area-id {

disable;

dead-interval seconds;

hello-interval seconds;

ipsec-sa name;

retransmit-interval seconds;

transit-delay seconds;
}


}


}


}

For a list of hierarchy levels at which you can include these statements, see the statement summary sections for these statements.

For a detailed OSPFv3 example configuration, see the JUNOS Feature Guide.

By default, OSPFv2 and OSPFv3 are disabled.

Note: In this manual, the term OSPF refers to both OSPFv2 and OSPFv3.

This chapter describes the following tasks for configuring OSPF:

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