The format of OSPF packets is not flexible enough to enable
applications exchange arbitrary data, which may be necessary in
certain situations. "OSPF Link-local Signaling" (LLS) describes
a vendor specific, backward-compatible technique to perform
link-local signaling, i.e., exchange arbitrary data on a link.
"OSPF Restart Signaling" describes a mechanism using LLS that
can be used as an alternative to that described in RFC 3623 for
routers to signal that they've restarted.
"OSPF Out-of-band LSDB resynchronization" describes a mechanism
using LLS for routers to resynchronize their LSDB without causing
topology changes, for example, when they have restarted and are
using the above Restart signaling mechanism.
Working Group Summary
The LLS mechanism is being published as Experimental to
document the original protocol; meanwhile, the OSPF Working
Group is working on a standards-track version.
The OSPF Working Group did not think that the Restart and
Resynchronization items provided sufficient benefit over the
existing work, later published as RFC 3623, to adopt them as
work items. They are being published simply for information.
Bill Fenner reviewed these specifications for the IESG.