gated.1m (2010 09)

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gated(1M) gated(1M)

If the re-parse is successful, any BGP and EGP peers that are no longer in the

conﬁguration are shut down, and new peers are started.

gated attempts to deter-

mine if changes to existing peers require a shutdown and restart. OSPF is not capable

of reconﬁguring; it is shutdown and restarted during a reconﬁguration. This may have

an adverse impact on the routing system.

It should also be possible to enable/disable any protocol without restarting

gated.

SIGINT Snap-shot of current state.

The current state of all

gated tasks, timers, protocols and tables are written to

/var/tmp/gated_dump

On systems supporting

fork(), this is done by forking a subprocess to dump the table

information so as not to impact gated

’s routing functions. On systems where memory

management does not support copy-on-write, this will cause the gated address space

to be duplicated; this may cause a noticeable impact on the system. On system not sup-

porting

fork(), the main process immediately processes the dump, which may impact

gated’s routing functions.

SIGTERM Graceful shutdown.

On receipt of a

SIGTERM, gated attempts a graceful shutdown. All tasks and proto-

cols are asked to shutdown. Most will terminate immediately, the exception being EGP

peers which wait for conﬁrmation. It may be necessary to repeat the

SIGTERM once

or twice if it this process takes too long.

All protocol routes are removed from the kernel’s routing table on receipt of a

SIGTERM. Interface routes, routes with RTF_STATIC set (from the route command

where supported) and static routes specifying retain will remain. To terminate

gated with the exterior routes intact, use SIGKILL.

SIGUSR1 Toggle tracing.

On receipt of a

SIGUSR1, gated will close the trace ﬁle. A subsequent SIGUSR1

will cause it to be reopened. This will allow the ﬁle to be moved regularly.

It is not possible to use

SIGUSR1 if a trace ﬁle has not been speciﬁed, or tracing is

being performed to stderr.

SIGUSR2 Check for interface changes.

On receipt of a

SIGUSR2, gated will rescan the kernel interface list looking for

changes.

WARNINGS

gated contains provisions for BGP protocol, but it is not ofﬁcially supported by HP at the present time.

Some RIP version 2 features (RFC1388) are not currently supported: MIB and route tag. The optional

OSPF version 2 (RFC1247) feature of TOS (type of service) based routing is not supported. The route

aggregation, generating a more general route from compressing the speciﬁc routes through the explicit

conﬁguration, is not supported in this release.

AUTHOR

gated was primarily developed by Cornell University which includes code from the Regents of the

University of California and the University of Maryland.