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Cisco EtherSwitch Service Modules Feature Guide
Network Configuration Examples
85
Cisco IOS Release 12.2(25)SEC
Figure 10 High-Performance Wiring Closet
Multidwelling Network Using the Cisco EtherSwitch Service Modules
A growing segment of residential and commercial customers is requiring high-speed access to Ethernet
metropolitan-area networks (MANs). Figure 11 shows a configuration for a Gigabit Ethernet MAN ring
using multilayer switch stacks as aggregation switches in the mini-point-of-presence (POP) location.
These switches are connected through 1000BASE-X SFP service module ports.
All ports on the residential service modules 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 3750 multilayer switches provide security and bandwidth management.
Gigabit
servers
121821
Cisco integrated services
router with EtherSwitch
service module
Catalyst 3750
multilayer
StackWise
switch stack
Internet
Cisco IP
phones
Workstations
running
Cisco SoftPhone
software
Aironet wireless
access points
IP IP