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For certain Path Trace features to work properly, you need to make some changes to the platforms mentioned in the following table.
Platform |
Required Configuration |
---|---|
Configure NetFlow on these routers. For information, see Cisco NetFlow Configuration. |
|
Devices connected to a voice or video endpoint (for example, Cisco IP phones). |
Enable IPDT for these devices to discover voice/data VLAN information about the endpoints. For information, see IP Device Tracking Configuration. |
Devices on which you want Performance Monitor information. |
You do not need to make any changes to the devices to run a path trace to gather performance monitor information. Cisco Path Trace does this automatically when you initiate this type of a path trace. For information about the configuration changes that Cisco Path Trace makes, see Performance Monitor Configuration. |
Cisco NetFlow needs to be enabled on the following devices to support the Cisco APIC-EM path trace functionality:
Cisco ASR 1000 Series Aggregation Services Routers
Cisco ASR 9000 Series Aggregation Services Routers
Cisco ISR-G2 Routers
Cisco ISR-4451 -X
The controller pulls cached NetFlow records from the device for path trace. To enable NetFlow on your devices, refer to your specific device documentation. For general information about Cisco NetFlow technology, see the Cisco IOS Flexible NetFlow Technology Q&A document.
The Cisco APIC-EM discovery function uses several protocols and methods to retrieve network information, such as hosts IP addresses, MAC addresses, and network attachment points. To use IP Device Tracking (IPDT) for discovery, you must manually enable IPDT on the devices and interfaces for this protocol to be used to collect host information. To enable IPDT on your devices, refer to your specific device documentation. For general information about IPDT, see IP Device Tracking (IPDT) Overview.
When you run a path trace to collect Perf Mon statistics, the Cisco APIC-EM automatically configures all of the devices in the requested path with the necessary flow monitor commands. The Cisco APIC-EM removes the configuration from the device if there is no corresponding path trace request present or after 24 hours of the path trace request, whichever is first.
The following configuration is sent to each device in the requested path:
flow record type performance-monitor APIC_EM-FLOW_ANALYSIS_PERFMON_RECORD match ipv4 protocol match ipv4 source address match ipv4 destination address match transport source-port match transport destination-port match transport rtp ssrc collect ipv4 dscp collect ipv4 ttl collect transport rtp jitter mean collect transport rtp jitter minimum collect transport rtp jitter maximum collect interface input collect interface output collect counter bytes long collect counter packets long collect counter bytes rate collect counter packets drop (not applicable to routers) flow monitor type performance-monitor APIC_EM-FLOW_ANALYSIS_PERFMON_MONITOR description APIC_EM flow-analysis request monitor record APIC_EM-FLOW_ANALYSIS_PERFMON_RECORD ip access-list extended APIC_EM-FLOW_ANALYSIS_ACL class-map APIC_EM-FLOW_ANALYSIS_PERFMON_CLASSMAP match access-group name APIC_EM-FLOW_ANALYSIS_ACL policy-map type performance-monitor APIC_EM-FLOW_ANALYSIS_PERFMON_POLICYMAP class APIC_EM-FLOW_ANALYSIS_PERFMON_CLASSMAP flow monitor APIC_EM-FLOW_ANALYSIS_PERFMON_MONITOR interface GigabitEthernet x/y service-policy type performance-monitor input APIC_EM-FLOW_ANALYSIS_PERFMON_POLICYMAP ip access-list extended APIC_EM-FLOW_ANALYSIS_ACL permit ip host aa.bb.cc.dd host ww.xx.yy.zz 1