Alcatel Carrier Internetworking Solutions 6800 User Manual
OS6624/6648 Architecture
page -50
OmniSwitch Troubleshooting Guide
September 2005
Layer 3 Forwarding
Packets Arrived
Header 64 Bytes
Apply protocol based VLAN on
Search the IP Source and Destination addresses in the
Does the
address exist
i d t b
address exist
i d t b
?
Apply address VLAN for
Untagged packet
Untagged packet
Is Routed
P k t?
P k t?
Send the packet to CPU for
address Learning
address Learning
Broadcast the packet to all the
ports in the VLAN
ports in the VLAN
Yes
No
Apply Filter,
Mirror, Priority,
QOS and WRED
Mirror, Priority,
QOS and WRED
Find Outgoing Tag and Port’s
802.1Q status
802.1Q status
Apply Filter, Mirror, Priority,
QOS and WRED Rules
QOS and WRED Rules
Find outgoing Port’s 802.1Q
t t
Drop the
k t
Modify and Send the Packet to the Destination Port
Is the dest Port
member of
egress VLAN
member of
egress VLAN
Is the dest
and receive
port in the
and receive
port in the
Yes
L3
L3
No
L3-
L3-
N
Yes
Yes
N