Cisco 2950 - Catalyst Switch Configuration Manual page 55

Chapter 1 Overview
All ports on the residential Catalyst 2950 and 2955 switches (and Catalyst LRE switches if they are
included) are configured as 802.1Q trunks with protected port and STP root guard features enabled. The
protected port feature provides security and isolation between ports on the switch, ensuring that
subscribers cannot view packets destined for other subscribers. STP root guard prevents unauthorized
devices from becoming the STP root switch. All ports have IGMP snooping or CGMP enabled for
multicast traffic management. ACLs on the uplink ports to the aggregating Catalyst 3550 multilayer
switches provide security and bandwidth management.
The aggregating switches and routers provide services such as those described in the previous examples,
"Small to Medium-Sized Network
Figure 1-7
Gigabit switch routers
Catalyst 3550
Set-top box
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Catalyst 2950 Switches in a MAN Configuration
Cisco 12000
Catalyst 6500
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switches
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multilayer
switches
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Si
Catalyst
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Si
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Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide
Network Configuration Examples
Configuration."
Service
Provider
POP
Mini-POP
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Gigabit MAN
Residential
location
Residential
gateway (hub)
Set-top box
PC
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