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