H3C S3100-52P Operation Manual page 222

Operation Manual – DLDP
H3C S3100-52P Ethernet Switch
2) A DLDP packet received is processed as follows:
In authentication mode, the DLDP packet is authenticated and is then dropped if it
fails the authentication.
The packet is further processed, as described in
Table 1-3 The procedure to process a received DLDP packet
Packet type
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packet
Flush packet
Probe packet
Echo packet
3) If no echo packet is received from the neighbor, DLDP performs the following
processing:
Processing procedure
If the corresponding neighbor entry does not
exist on the local device, DLDP creates the
neighbor entry, triggers the entry aging timer,
Extracts
and switches to the probe state.
neighbor
information
If the corresponding neighbor entry already
exists on the local device, DLDP resets the
aging timer of the entry.
Removes the neighbor entry from the local device
Sends echo Creates the neighbor entry if it does not exist
packets on the local device.
containing both
Resets the aging timer of the entry if the
neighbor and its
neighbor entry already exists on the local
own information
device.
to the peer
No Drops the echo packet
Checks to
see if the
Checks
neighbor
to see if
information
the local
contained
device is
Yes in the
in the
packet is
probe
the same
state
as that on
the local
device
1-5
Chapter 1 DLDP Configuration
Table 1-3.
No Drops the echo packet
Sets the flag bit of the
neighbor to bidirectional
link
If all neighbors are in the
bidirectional link state,
Yes
DLDP switches from the
probe state to the
advertisement state, and
sets the echo waiting
timer to 0.