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Catalyst 3750 Switch Software Configuration Guide
OL-8550-09
Chapter 38 Configuring IP Unicast Routing
Configuring Multi-VRF CE
For more information about configuring a multicast within a Multi-VRF CE, see the Cisco IOS IP
Multicast Configuration Guide, Release 12.4.
Configuring VRF-Aware Services
IP services can be configured on global interfaces, and these services run within the global routing
instance. IP services are enhanced to run on multiple routing instances; they are VRF-aware. Any
configured VRF in the system can be specified for a VRF-aware service.
VRF-Aware services are implemented in platform-independent modules. VRF means multiple routing
instances in Cisco IOS. Each platform has its own limit on the number of VRFs it supports.
VRF-aware services have the following characteristics:
• The user can ping a host in a user-specified VRF.
• ARP entries are learned in separate VRFs. The user can display Address Resolution Protocol (ARP)
entries for specific VRFs.
These services are VRF-Aware:
• ARP
• Ping
• Simple Network Management Protocol (SNMP)
• Hot Standby Router Protocol (HSRP)
• RADIUS
• Syslog
• Traceroute
• FTP and TFTP
Note VRF-Aware services are not supported for Unicast Reverse Path Forwarding (uRPF).
Step 9
ip vrf forwarding vrf-name Associate the VRF with the Layer 3 interface.
Step 10
ip address ip-address mask Configure IP address for the Layer 3 interface.
Step 11
ip pim sparse-dense mode Enable PIM on the VRF-associated Layer 3 interface.
Step 12
end Return to privileged EXEC mode.
Step 13
show ip vrf [brief | detail | interfaces]
[vrf-name]
Verify the configuration. Display information about the configured
VRFs.
Step 14
copy running-config startup-config (Optional) Save your entries in the configuration file.
Command Purpose