Cisco 3845 - Security Bundle Router

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Cisco ME 3800X and 3600X Switch Software Configuration Guide
OL-23400-01
Chapter 29 Configuring IP Unicast Routing
Configuring Multi-VRF CE
Use the no ip vrf vrf-name global configuration command to delete a VRF and to remove all interfaces
from it. Use the no ip vrf forwarding interface configuration command to remove an interface from the
VRF.
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)
• Syslog
• Traceroute
• FTP and TFTP
Note VRF-Aware services are not supported for Unicast Reverse Path Forwarding (uRPF).
Step 5
route-target {export | import | both}
route-target-ext-community
Create a list of import, export, or import and export route target
communities for the specified VRF. Enter either an AS system number
and an arbitrary number (xxx:y) or an IP address and an arbitrary
number (A.B.C.D:y). The route-target-ext-community should be the
same as the route-distinguisher entered in Step 4.
Step 6
import map route-map (Optional) Associate a route map with the VRF.
Step 7
interface interface-id Specify the Layer 3 interface to be associated with the VRF, and enter
interface configuration mode. The interface can be a routed port or SVI.
Step 8
ip vrf forwarding vrf-name Associate the VRF with the Layer 3 interface.
Step 9
end Return to privileged EXEC mode.
Step 10
show ip vrf [brief | detail | interfaces]
[vrf-name]
Verify the configuration. Display information about the configured
VRFs.
Step 11
copy running-config startup-config (Optional) Save your entries in the configuration file.
Command Purpose