Configuring The Gigabit Ethernet Switch - Cisco WCM300 - Channel Bonded Cable Modem Implementation Manual

Chapter 4 Implementing and Configuring the Solution

Configuring the Gigabit Ethernet Switch

A Gigabit Ethernet (GE) switch linking the Cisco Wideband SPAs and the edge QAM (EQAM) devices
is optional except when more than two EQAM devices are required for two Wideband SPAs, or when
video-on-demand (VOD) traffic and the RF channels for wideband channels are mixed on the same
EQAM device. The configuration of the Gigabit Ethernet switch is device-specific and
implementation-specific, but it is recommended that virtual LANs (VLANs) be used to create separate
broadcast domains for the traffic of each Wideband SPA.
Figure 4-1
EQAM B. Wideband SPA 2 uses the QAM outputs on EQAM C and EQAM D.
•
•
Both the Wideband SPAs and EQAM devices have redundant Gigabit Ethernet links that are members
of the appropriate VLANs.
Figure 4-1
OL-10705-02
shows an example of VLAN usage. Wideband SPA 1 uses the QAM outputs on EQAM A and
VLAN 1 carries traffic for Wideband SPA 1.
VLAN 2 carries traffic for Wideband SPA 2.
VLANs for Wideband Traffic
uBR10012
CMTS
VLAN 1
Wideband SPA 1
GE
VLAN 2
Wideband SPA 2
GE
Cisco Cable Wideband Solution Design and Implementation Guide, Release 1.0
Wideband CMTS Configuration
VLAN 1
EQAM A
GE
VLAN 1
EQAM B
GE
EQAM C
GE
VLAN 2
EQAM D
GE
VLAN 2
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