Alcatel Carrier Internetworking Solutions 6648 - Manual (Page 363)

Unknown Destination
OmniSwitch Troubleshooting Guide September 2005 page -39
Packet arrives from Catalina to Coronado
Source Address
known ?
Y
1
Pseudo-CAM (PCAM)
Provides Group ID
(GID) N
2
Assign
Default GID
and sends to
S/W
De Queue packet and
perform PCAM update
Is DA
Special ?
Is DA Router MAC,
IGMP, STP, Multicast
Switching
Y
5
N
Is DA
Known?
Lookup provides QID
& Priority Description
Index (PDI)
Y
4
Access PDI to assign
internal priority (0…3)
& final QID
En Queue data to
final QID, QID
determines
destination port,
priority &
bandwidth
Queue Manager selects
packet for transmission
to Nantucket, if needed
Nantucket send to other
Coronado, if needed.
Egress Coronado forwards the
packet to destination port,
strips Q-tag, if needed.
Known/Unknown SA and Known DA
N
A
A
DA QID is unknown, QID is set to flood,
PDI is set to unknown DA and ReQID is set
for s/w for unknown DA
S/W De Queue s packet. Includes the learning
of MAC DA via request to all other Coronados
Egress logic sends copy of the packet to all
the ports in that vlan. Strips Q-tag if needed
.
Get final QID
4
Unknown DA