Cisco Cisco Agent Desktop 8.5 Referências técnicas
References
26
of
34
November 26, 2003
The actions required to configure the system to use multiple NIC cards are
shown in Appendix C.
shown in Appendix C.
B.4 Ingress and Egress Monitoring
In some configurations, the VoIP Monitor service can receive duplicate voice
packets. This can potentially happen with many Cisco Catalyst switches. The
problem occurs in agent-to-agent calls when SPAN/RSPAN is configured to
sniff both ingress and egress packets from both parties on the call.
packets. This can potentially happen with many Cisco Catalyst switches. The
problem occurs in agent-to-agent calls when SPAN/RSPAN is configured to
sniff both ingress and egress packets from both parties on the call.
As a voice packet leaves Agent A’s port, SPAN copies it to the VoIP Monitor
service port. When the voice packet arrives at Agent B’s port, it is copied again
and sent to the VoIP service. The same happens when Agent B speaks. All
packets are seen twice by the VoIP Monitor service. This causes poor speech
quality.
service port. When the voice packet arrives at Agent B’s port, it is copied again
and sent to the VoIP service. The same happens when Agent B speaks. All
packets are seen twice by the VoIP Monitor service. This causes poor speech
quality.
To avoid this, only ingress packets to a port are sent to the VoIP Monitor ser-
vice. This is a setting for SPAN. Some switches do not support this setting.
vice. This is a setting for SPAN. Some switches do not support this setting.
The following Catalyst switches do not support ingress-only packet sniffing:
•
1900
•
2820
•
2900
•
2900XL
•
3000
•
3100
•
3200
•
3500XL
B.5 VSPAN Support
In some switches, SPAN cannot use VLANs as sources. In that case, SPAN
must designate individual ports to use for monitoring.
must designate individual ports to use for monitoring.
The following Catalyst switches do not support VSPAN:
•
1200
•
1900
•
2820
•
2900XL
•
2950