Using the BayStack 450 10/100/1000 Series Switch1-68 309978-D Rev 01Because S4 does not support 802.1Q tagging, a single switch port on each switchmust be used for each VLAN (see “VLANs Spanning Multiple UntaggedSwitches” on page 1-59).The connection to S2 requires only one link between the switches because S1 andS2 are both BayStack 450 switches that support 802.1Q tagging (see “VLANsSpanning Multiple 802.1Q Tagged Switches” on page 1-58).VLAN Configuration RulesVLANs operate according to specific configuration rules. When creating VLANs,consider the following rules that determine how the configured VLAN reacts inany network topology:• Your switch supports up to 64 VLANs. You can create port-based VLANs andprotocol-based VLANs, in any combination, as long as you do not exceed atotal of 64 VLANs.• All ports that are involved in port mirroring must have memberships in thesame VLANs. If a port is configured for port mirroring, the port’s VLANmembership cannot be changed.• If a port is a trunk group member, all trunk members are added or deletedfrom the VLAN.• All ports involved in trunking and port mirroring must have the same VLANconfiguration. If a port is on a trunk with a mirroring port, the VLANconfiguration cannot be changed.• VLANs are not dependent on Rate Limiting settings.• If a port is an IGMP member on any VLAN, and is removed from a VLAN,the port’s IGMP membership is also removed.• If a port is added to a different VLAN, and it is already configured as a staticrouter port, the port is configured as an IGMP member on that specificVLAN.For more information about configuring VLANs, see “VLAN ConfigurationMenu” on page 3-44.See also Appendix E, “Quick Steps to Features,” for configuration flowcharts thatcan help you use this feature.
