Specifications

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11-4
Cisco Nexus 3000 Series NX-OS Unicast Routing Configuration Guide, Release 5.0(3)U2(2)
OL-25782-02
Chapter 11 Configuring Layer 3 Virtualization
Layer 3 Virtualization
Figure 11-2 shows an SNMP server that is reachable over the management VRF. You configure router A
to use the management VRF for SNMP server host 192.0.2.1.
Figure 11-2 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 11-3 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 11-3 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.
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