NAME
ospfd.conf
—
Open Shortest Path First daemon
configuration file
DESCRIPTION
The ospfd(8) daemon implements the Open Shortest Path First protocol version 2 as described in RFC 2328.
SECTIONS
The ospfd.conf
config file is divided into
three main sections.
- Macros
- User-defined variables may be defined and used later, simplifying the configuration file.
- Global Configuration
- Global settings for ospfd(8). A number of global settings can be overruled in specific areas or interfaces.
- Areas
- An OSPF router must be a member of at least one area. Areas are used to group interfaces, simplifying configuration.
Argument names not beginning with a letter, digit, or underscore must be quoted.
Additional configuration files can be included with the
include
keyword, for example:
include "/etc/ospfd.sub.conf"
MACROS
Macros can be defined that will later be expanded in context.
Macro names must start with a letter, digit, or underscore, and may contain
any of those characters. Macro names may not be reserved words (for example,
area
, interface
, or
hello-interval
). Macros are not expanded inside
quotes.
For example:
hi="5" area 0.0.0.0 { interface em0 { hello-interval $hi } }
The same can be accomplished by specifying the hello-interval globally or within the area declaration.
GLOBAL CONFIGURATION
All interface related settings can be configured globally, per area and per interface. The only settings that can be set globally and not overruled are listed below.
fib-update
(yes
|no
)- If set to
no
, do not update the Forwarding Information Base, a.k.a. the kernel routing table. The default isyes
. Settingfib-update
tono
will implicitly set thestub
router
option to ensure that no traffic tries to transit via this router. rdomain
tableid- Specifies the routing table ospfd(8) should modify. Table 0 is the default table.
- [
no
]redistribute
(static
|connected
|default
) [set ...
] - [
no
]redistribute
prefix [set ...
] - [
no
]redistribute rtlabel
label [set ...
] - If set to
connected
, routes to directly attached networks will be announced over OSPF. If set tostatic
, static routes will be announced over OSPF. If set todefault
, a default route pointing to this router will be announced over OSPF. It is possible to specify a network range with prefix; networks need to be part of that range to be redistributed. Additionally it is possible to redistribute based on route labels using thertlabel
keyword. By default no additional routes will be announced over OSPF.redistribute
statements are evaluated in sequential order, from first to last. The first matching rule decides if a route should be redistributed or not. Matching rules starting withno
will force the route to be not announced. The only exception isdefault
, which will be set no matter what, and additionallyno
cannot be used together with it.It is possible to set the route
metric
andtype
for each redistribute rule.type
is either 1 or 2. The default value fortype
is 1 and formetric
is 100. Setting more than one option needs curly brackets:redistribute static set { metric 300 type 2 }
rfc1583compat
(yes
|no
)- If set to
yes
, decisions regarding AS-external routes are evaluated according to RFC 2328. The default isno
. router-id
address- Set the router ID; if not specified, the numerically lowest IP address of the router will be used.
rtlabel
labelexternal-tag
number- Map route labels to external route tags and vice versa. The external route tag is a non-negative 32-bit number attached to AS-external OSPF LSAs.
spf-delay
(seconds|msec
milliseconds)- Set the SPF delay. The delay between receiving an update to the link state database and starting the shortest path first calculation. The default value is 1 second; valid range is 10 milliseconds-10 seconds.
spf-holdtime
(seconds|msec
milliseconds)- Set the SPF holdtime. The minimum time between two consecutive shortest path first calculations. The default value is 5 seconds; the valid range is 10 milliseconds-5 seconds.
stub
router
(yes
|no
)- If set to
yes
, all interfaces with active neighbors will have a metric of infinity. This ensures that the other routers prefer routes around this router while still being able to reach directly connected IP prefixes. Thestub
router
option is automatically enabled if either the sysctl(8) variable net.inet.ip.forwarding is set to a value different to 1 or if the FIB is not coupled.
AREAS
Areas are used for grouping interfaces. All interface-specific parameters can be configured per area, overruling the global settings.
area
address- Specify an area section, grouping one or more interfaces.
area 0.0.0.0 { interface em0 interface em1 { metric 10 } }
Area specific parameters are listed below.
demote
group [count]- Increase the carp(4) demotion counter by count on
the given interface group, usually carp, when no
neighbor in the area is in an active state. The demotion counter will be
decreased when one neighbor in that area is in an active state. The
default value for count is 1.
For more information on interface groups, see the
group
keyword in ifconfig(8). stub
[redistribute default
] [set ...
]- Mark the area as stub. Stub areas will not be flooded by as-ext LSA, resulting in smaller routing tables. Area border routers should redistribute a default network LSA; this can be enabled by specifying the default redistribute option. A default summary LSA will only be redistributed if the router has an active connection to the backbone area 0.0.0.0.
INTERFACES
Each interface can have several parameters configured individually, otherwise they are inherited. An interface is specified by its name. If multiple networks are configured an additional IP address can be supplied. By default the first IP address is used.
interface em0 { auth-type crypt auth-md 1 "yotVoo_Heypp" auth-md-keyid 1 } interface fxp0:192.168.1.3
Interface-specific parameters are listed below.
auth-key
key- Set the authentication key for
simple
authentication. Up to 8 characters can be specified. auth-md
key-id key- Set the authentication key-id and
key for
crypt
authentication. The valid range for key-id is 0-255. Up to 16 characters can be specified for key. Multiple keys may be specified. auth-md-keyid
key-id- Configure the key-id to use for
crypt
authentication. The valid range for key-id is 0-255. The default key-id is 1. While key-id 0 is valid, it is unavailable on various other implementations. auth-type
(none
|simple
|crypt
)- Set the authentication type. The default is
none
. Simple authentication uses a plaintext password, up to 8 characters. Crypt authentication uses an MD5 hash. demote
group- Increase the carp(4) demotion counter by 1 on the given interface group, usually carp, when the interface state is going down. The demotion counter will be decreased when the interface state is active again.
fast-hello-interval
msec
milliseconds- If the interface is configured to use
router-dead-time minimal
, hello packets will be sent using this timer. The default value is 333; valid range is 50-333 milliseconds. hello-interval
seconds- Set the hello interval. The default value is 10; valid range is 1-65535 seconds.
metric
cost- Set the interface metric a.k.a. cost. The default value is 10; valid range is 1-65535.
passive
- Prevent transmission and reception of OSPF packets on this interface. The specified interface will be announced as a stub network.
retransmit-interval
seconds- Set retransmit interval. The default value is 5 seconds; valid range is 5-3600 seconds.
router-dead-time
(seconds|minimal
)- Set the router dead time, a.k.a. neighbor inactivity timer. The default
value is 40 seconds; valid range is 2-2147483647 seconds. If the router
dead time has been set to
minimal
, the timer is set to 1 second and hello packets are sent using the interval specified byfast-hello-interval
. When a neighbor has been inactive for router-dead-time its state is set to DOWN. Neighbors that have been inactive for more than 24 hours are completely removed. router-priority
priority- Set the router priority. The default value is 1; valid range is 0-255. If set to 0 the router is not eligible as a Designated Router or Backup Designated Router.
transmit-delay
seconds- Set the transmit delay. The default value is 1; valid range is 1-3600 seconds.
FILES
- /etc/ospfd.conf
- ospfd(8) configuration file
SEE ALSO
HISTORY
The ospfd.conf
file format first appeared
in OpenBSD 3.7.