
3;%(
Data Sheet
2-37
04.2000
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If the LB indication of an LB cell is equal to 0 (LB cell already looped) and the connection is in
LB state (LB state = 1) and the LB source ID of the LB cell is equal to the network element ID
(LB source ID match) the LB cell is copied into the receive cell buffer of the μP and the LB cell
is forwarded to the terminating segment point. If the LB source ID flag of a connection is disabled
the LB cell is also copied into the receive cell buffer of the μP and the LB cell is forwarded to the
terminating segment point.
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don’t care
enabled
match
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set LB indication to 0
LB cell is looped back
forward of LB cell to terminating
segment point
forward of LB cell to terminating
segment point
enabled
disabled
don’t care
mismatch
don’t care
don’t care
0
0
forward of LB cell to terminating
segment point
copy of LB cell to μP receive cell
buffer
forward of LB cell to terminating
segment point
forward of LB cell to terminating
segment point
1
disabled
enabled
don’t care
match
enabled
mismatch
AOPE
LB status = 1
AOPE
LB status = 0
AOPE
LB status = 1
AOPE
LB status = 0
insertion of F5 LB cell
drop LB cell to μP
receive cell buffer
AOPE
configured as an
F5 orginating end point
configured as an
F4 originating end point and
F5 originating segment point
configured as an
F4 intermediate point
configured as an
F5 terminating end point
configured as an
F4 terminating end point and
F5 terminating segment point
configured as an
F4 intermediate point
configured as an
F4 terminating end point and
F5 intermediate point
configured as an
F4 originating end point and
F5 intermediate point
AOPE
configured as an
F5 terminating segment and
F5 terminating end point
configured as an
F5 originating segment and
F5 originating end point
LB cell
looped back
configured as an
F4 intermediate point
configured as an
F4 intermediate point
F5 Segment
LB
set LB indication
flag to 0
LB cell
looped back
1
2
3
4
5
set LB indication
flag to 0
4