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Using the BayStack 450 10/100/1000 Series Switch
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302401-D Rev 00
• Filtering database identifier (FID) -- the specific filtering/forwarding database
within the BayStack 450 switch that is assigned to each VLAN. The current
version of software assigns all VLANs to the same FID. This is referred to as
Shared VLAN Learning in the IEEE 802.1Q specification.
The default configuration settings for BayStack 450 switches have all ports set as
untagged members of VLAN 1 with all ports configured as PVID = 1. Every
VLAN is assigned a unique VLAN identifier (VID) which distinguishes it from
all other VLANs. In the default configuration example shown in Figure 1-16
, all
incoming packets are assigned to VLAN 1 by the default port VLAN identifier
(PVID =1). Untagged packets enter and leave the switch unchanged.
Figure 1-16. Default VLAN Settings
When configuring VLANs, you configure the switch ports as tagged or untagged
members of specific VLANs (see Figure 1-17
through Figure 1-20).
Port 1
DA
SA
Data
CRC
Incoming
untagged
packet
BS45010A
Port 2 Port 3 Port 4 Port 5
VLAN 1
802.1Q Switch
By default:
Key
All ports are assigned PVID = 1
All ports are untagged members of VLAN 1
PVID = 1
Port 6 Port 7 Port 8
DA
SA
Data
CRC
Outgoing
untagged packet
(unchanged)
kombk.book Page 34 Tuesday, June 29, 1999 3:25 PM