Cisco Nexus 3000 series - Filtering

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9-4
Cisco Nexus 3000 Series NX-OS Unicast Routing Configuration Guide, NX-OS Release 5.0(3)U1(1)
Chapter 9 Configuring Layer 3 Virtualization
Layer 3 Virtualization
Figure 9-2 Service VRF Reachability
Filtering
Filtering allows you to limit the type of information that goes to a VRF-aware service based on the VRF.
For example, you can configure a syslog server to support a particular VRF. Figure 9-3 shows two syslog
servers with each server supporting one VRF. syslog server A is configured in VRF Red, so Cisco
NX-OS sends only system messages generated in VRF Red to syslog server A.
Figure 9-3 Service VRF Filtering
Combining Reachability and Filtering
You can combine reachability and filtering for VRF-aware services. You configure the VRF that Cisco
NX-OS uses to connect to that service as well as the VRF that the service supports. If you configure a
service in the default VRF, you can optionally configure the service to support all VRFs.
Figure 9-4 shows an SNMP server that is reachable on the management VRF. You can configure the
SNMP server to support only the SNMP notifications from VRF Red, for example.
Figure 9-4 Service VRF Reachability Filtering
186417
Router A
mgmt0
VRF management
SNMP Server
192.0.2.1
186418
Router A
Ethernet 2/1
VRF Red
Ethernet 2/2
VRF Blue
Syslog Server A
Syslog Server B
186419
Router A
Ethernet 2/1
VRF Red
Ethernet 2/2
VRF Blue
Router B
Router C
mgmt0
VRF management
SNMP Server
192.0.2.1