- Alcatel Internetworking, Inc. Switch Troubleshooting Guide

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

idtb ?

Apply address VLAN for

Untagged packet

Is Routed

Pkt?

Send the packet to CPU for

address Learning

Broadcast the packet to all the

ports in the VLAN

Apply Filter,

Mirror, Priority,

QOS and WRED

Find Outgoing Tag and Port’s

802.1Q status

Apply Filter, Mirror, Priority,

QOS and WRED Rules

Find outgoing Port’s 802.1Q

Drop the

Modify and Send the Packet to the Destination Port

Is the dest Port

member of

egre

ss VLAN

Is the dest

and receive

port in the

Yes

L3-