Cisco Cisco Agent Desktop 8.5 Guia De Configuração Rápida
Introduction
November 2013
35
audio streams when the agent is on a call. When SPAN is configured and uses a VLAN
as a source, the voice VLAN is the one that is selected so only voice traffic is sent to
the VoIP server for processing. There are other reasons for using voice VLANs in SPAN
configurations as discussed in the section,
as a source, the voice VLAN is the one that is selected so only voice traffic is sent to
the VoIP server for processing. There are other reasons for using voice VLANs in SPAN
configurations as discussed in the section,
.
, all the IP phones connected to the three switches shown could be
grouped into a VLAN that only carries voice traffic. We could call this Voice VLAN 10. If
SPAN is configured on the top switch to use VLAN 10 as the source of network traffic,
any voice traffic sent or received by a port that is part of VLAN 10 that traverses the
top switch will be copied and sent to the SPAN destination port. The emphasis in the
previous sentence is very important. Just because we include a port on the bottom
switch as part of VLAN 10 does not mean that the top switch will automatically see all
its traffic like an RSPAN configuration. It is captured only if the phone is sending
packets that hit the top switch. This is also the case if the phone on the bottom switch
was on a call with an IP phone connected to the top switch. It also works if the phone
on the bottom switch is sending packets through the top switch to a connected
gateway, router, and so on. This is illustrated in
SPAN is configured on the top switch to use VLAN 10 as the source of network traffic,
any voice traffic sent or received by a port that is part of VLAN 10 that traverses the
top switch will be copied and sent to the SPAN destination port. The emphasis in the
previous sentence is very important. Just because we include a port on the bottom
switch as part of VLAN 10 does not mean that the top switch will automatically see all
its traffic like an RSPAN configuration. It is captured only if the phone is sending
packets that hit the top switch. This is also the case if the phone on the bottom switch
was on a call with an IP phone connected to the top switch. It also works if the phone
on the bottom switch is sending packets through the top switch to a connected
gateway, router, and so on. This is illustrated in
.
Figure 14.
Limitations of spanning VLANs