HP A5830 series Configuration Manual page 40

Table 15 Procedures for processing different types of DLDP packets received
Packet type Processing procedure
Retrieves the
Advertisement
neighbor
packet with RSY tag
information
Normal
Retrieves the
Advertisement
neighbor
information
packet
Determines whether
Flush packet the local port is in
Disable state
Retrieves the
Probe packet neighbor
information
Retrieves the
Echo packet neighbor
information
Checks whether the
Disable packet local port is in
Disable state
Checks whether the
RecoverProbe local port is in
packet Disable or
Advertisement state
RecoverEcho packet
Checks whether the
If the corresponding neighbor entry does not exist, creates the
neighbor entry, triggers the Entry timer, and transits to Probe
state.
If the corresponding neighbor entry already exists, resets the
Entry timer and transits to Probe state.
If the corresponding neighbor entry does not exist, creates the
neighbor entry, triggers the Entry timer, and transits to Probe
state.
If the corresponding neighbor entry already exists, resets the
Entry timer.
If it is, performs no processing.
If it is not, removes the corresponding neighbor entry, if any.
If the corresponding neighbor entry does not exist, creates the
neighbor entry, transits to Probe state, and returns Echo
packets.
If the corresponding neighbor entry already exists, resets the
Entry timer and returns Echo packets.
If the corresponding neighbor entry does not exist, creates the
neighbor entry, triggers the Entry timer, and transits to Probe
state.
If the neighbor information it carries conflicts
with the corresponding locally maintained
neighbor entry, drops the packet.
The
correspondin
Otherwise, sets the flag of the neighbor as
g neighbor
two-way connected. In addition, if the flags
entry already
of all neighbors are two-way connected, the
exists
device transits from Probe state to
Advertisement state and disables the Echo
timer.
If it is, performs no processing.
If it is not, sets the state of the corresponding neighbor to
unidirectional, and then checks the state of other neighbors. If
all neighbors are unidirectional, transitions the local port to
the Disable state. If the state of some neighbors is unknown,
waits until the state of these neighbors is determined. If
bidirectional neighbors are present, removes all unidirectional
neighbors.
If it is not, performs no processing.
If it is, returns RecoverEcho packets.
If it is not, performs no processing.
40