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Chapter 5 Configuring a LAN with DHCP and VLANs
Switch Port Configurations
Note Per-Port enabling and disabling of unknown multicast and unicast packets is not supported on the Cisco
1800 (Fixed) configuration router.
Per-Port Storm Control
You can use these per-port storm control techniques to block the forwarding of unnecessary, flooded
traffic.
Fallback Bridging
With Fallback Bridging, the switch bridges together two or more VLANs or routed ports, essentially
connecting multiple VLANs within one bridge domain.
To configure Fallback Bridging for a set of SVIs, the SVIs must be assigned to bridge groups. All bridges
in the same group belong to the same bridge domain. Each SVI can be assigned to only one bridge group.
Separate Voice and Data Subnets
For ease of network administration and increased scalability, network managers can configure the switch
ports to support Cisco IP phones such that the voice and data traffic reside on separate subnets.
IGMP Snooping
By default, IGMP Snooping is globally enabled on the switch ports. When globally enabled or disabled,
it is also enabled or disabled on all VLAN interfaces. It can be enabled and disabled on a per-VLAN
basis.
Note All of the procedures for configuring the switch ports, including configuration examples and information
on the features and interfaces are in the Cisco HWIC-4ESW and HWIC-9ESW EtherSwitch Interface
Cards document on Cisco.com. See this document to configure the switch ports.