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diff --git a/doc/babeld.texi b/doc/babeld.texi new file mode 100644 index 00000000..1f24edd0 --- /dev/null +++ b/doc/babeld.texi @@ -0,0 +1,118 @@ +@c -*-texinfo-*- +@c This is part of the Quagga Manual. +@c @value{COPYRIGHT_STR} +@c See file quagga.texi for copying conditions. +@node Babel +@chapter Babel + +Babel is an interior gateway protocol that is suitable both for wired +networks and for wireless mesh networks. Babel has been described as +``RIP on speed'' --- it is based on the same principles as RIP, but +includes a number of refinements that make it react much faster to +topology changes without ever counting to infinity, and allow it to +perform reliable link quality estimation on wireless links. Babel is +a double-stack routing protocol, meaning that a single Babel instance +is able to perform routing for both IPv4 and IPv6. + +Quagga implements Babel as described in RFC6126. + +@menu +* Configuring babeld:: +* Babel configuration:: +* Babel redistribution:: +* Show Babel information:: +* Babel debugging commands:: +@end menu + +@node Configuring babeld, Babel configuration, Babel, Babel +@section Configuring babeld + +The @command{babeld} daemon can be invoked with any of the common +options (@pxref{Common Invocation Options}). + +The @command{zebra} daemon must be running before @command{babeld} is +invoked. Also, if @command{zebra} is restarted then @command{babeld} +must be too. + +Configuration of @command{babeld} is done in its configuration file +@file{babeld.conf}. + +@node Babel configuration, Babel redistribution, Configuring babeld, Babel +@section Babel configuration + +@deffn Command {router babel} {} +@deffnx Command {no router babel} {} +Enable or disable Babel routing. +@end deffn + +@deffn {Babel Command} {network @var{ifname}} {} +@deffnx {Babel Command} {no network @var{ifname}} {} +Enable or disable Babel on the given interface. +@end deffn + +@deffn {Interface Command} {babel wired} {} +@deffnx {Interface Command} {babel wireless} {} +Specifies whether this interface is wireless, which disables a number +of optimisations that are only correct on wired interfaces. +Specifying @code{wireless} (the default) is always correct, but may +cause slower convergence and extra routing traffic. +@end deffn + +@deffn {Interface Command} {babel split-horizon} +@deffnx {Interface Command} {no babel split-horizon} +Specifies whether to perform split-horizon on the interface. +Specifying @code{no babel split-horizon} (the default) is always +correct, while @code{babel split-horizon} is an optimisation that +should only be used on symmetric and transitive (wired) networks. +@end deffn + +@deffn {Interface Command} {babel hello-interval <20-655340>} +Specifies the time in milliseconds between two scheduled hellos. On +wired links, Babel notices a link failure within two hello intervals; +on wireless links, the link quality value is reestimated at every +hello interval. The default is 4000@dmn{ms}. +@end deffn + +@deffn {Interface Command} {babel update-interval <20-655340>} +Specifies the time in milliseconds between two scheduled updates. +Since Babel makes extensive use of triggered updates, this can be set +to fairly high values on links with little packet loss. The default +is 20000@dmn{ms}. +@end deffn + +@deffn {Babel Command} {babel resend-delay <20-655340>} +Specifies the time in milliseconds after which an ``important'' +request or update will be resent. The default is 2000@dmn{ms}. You +probably don't want to tweak this value. +@end deffn + +@node Babel redistribution, Show Babel information, Babel configuration, Babel +@section Babel redistribution + +@deffn {Babel command} {redistribute @var{kind}} +@deffnx {Babel command} {no redistribute @var{kind}} +Specify which kind of routes should be redistributed into Babel. +@end deffn + +@node Show Babel information, Babel debugging commands, Babel redistribution, Babel +@section Show Babel information + +@deffn {Command} {show babel database} {} +@deffnx {Command} {show babel interface} {} +@deffnx {Command} {show babel neighbour} {} +@deffnx {Command} {show babel parameters} {} +These commands dump various parts of @command{babeld}'s internal +state. They are mostly useful for troubleshooting. +@end deffn + +@node Babel debugging commands, , Show Babel information, Babel +@section Babel debugging commands + +@deffn {Babel Command} {debug babel @var{kind}} {} +@deffnx {Babel Command} {no debug babel @var{kind}} {} +Enable or disable debugging messages of a given kind. @var{kind} can +be one of @samp{common}, @samp{kernel}, @samp{filter}, @samp{timeout}, +@samp{interface}, @samp{route} or @samp{all}. Note that if you have +compiled with the NO_DEBUG flag, then these commands aren't available. +@end deffn + |