C-6 APPENDIX C: VLANS ON THE COREBUILDER SYSTEM
This example shows how flooding decisions are made according to VLANs set up by protocol (assuming an
Index | VLAN | Ports |
1 | Default | 1 - 18 |
2 | IP | 1 - 12 |
3 | IPX | 11 - 16 |
Data received on | Is flooded on | Because |
IP - port 1 | VLAN 2 | IP data received matches IP VLAN on the |
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| source port. |
IPX - port 11 | VLAN 3 | IPX data received matches IPX VLAN on the |
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| source port. |
XNS - port 1 | VLAN 1 | XNS data received matches no protocol |
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| VLAN, so the Default VLAN is used. |
VLAN Exception Flooding
If data arrives on a switch port for a certain protocol and VLANs for that protocol are defined in the system but not on that switch port, the default VLAN defines the flooding domain for that data. This case is called VLAN exception flooding.
This example shows how the VLAN exception flooding decision is made (assuming an
Index | VLAN | Ports |
1 | Default | 1 - 18 |
2 | IP | 1 - 10 |
Data received on | Is flooded on | Because |
XNS - port 1 | VLAN 1 | XNS data does not match any defined VLAN |
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| in the system. |
IP - port 2 | VLAN 2 | IP data received matches IP VLAN 2 for |
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| source ports 1 - 10. |
IP - port 12 | VLAN 1 | IP data received on source port 12 does not |
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| match any defined source port for IP VLAN, |
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| so the Default VLAN is used. |