Examples Of Flooding And Forwarding Decisions - 3Com corebuilder 3500 Implementation Manual

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Examples of Flooding

and Forwarding

This section provides several examples of flooding and forwarding

Example 1: Flooding Decisions for Protocol-based VLANs

Table 24 shows how flooding decisions are made according to three

VLANs that are set up by protocol (assuming a 12-port configuration). In

this example, ports and frames are untagged and the destination address

is unknown, multicast, or broadcast.

Table 24 Protocol-based VLANs and Flooding Decisions

Untagged data

received on this

IPX - port 11

XNS - port 1

Is flooded on

IP data received matches IP1 on the

source (receive) port.

IPX data received matches IPX1 on the

source port.

Default, VID 1

XNS data received matches no protocol

VLAN, so the Default VLAN is used.