Configuring Virtual Routers
This section provides examples of some of the more common virtual router tasks.
There are different uses of the virtual-router command. You can create or access VRs and VRFs in Global Configuration mode or map a VR to a domain map in Domain Map Configuration mode. Once you create a VR, you can continue to work in different command modes and configure the same user interface parameters as before the virtual router was created.
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host1(config)#virtual-router western
host1:western(config)#
- Create a VRF to provide forwarding information to your system. In this example, the VRF created is in context with the VR created above.
host1:western(config)#ip vrf eastern
Proceed with new VRF creation? [confirm]
host1:western(config-vrf)#virtual-router:eastern
host1:western:eastern(config)#
host1(config)#virtual-router western:eastern
host1:western:eastern(config)#
host1:western:eastern(config)#?
aaa Configure authentication, authorization, and accounting characteristics
access-list Configure an access list entry
arp Configure a static ARP entry
bandwidth Configure slot-group bandwidth control
banner Define a banner line
baseline Configure baseline operations
boot Configure boot time behavior
bulkstats Configure bulkstats parameters
cbf Configure connection-based forwarding
classifier-list Configure a classifier list entry
clns Configure CLNS characteristics
clock Set the system's clock
controller Configure controller parameters
crypto Configure cryptographic parameters
disable-autosync Disable automatic synchronization of redundant system controller file system
disable-switch-on-error Disable automatic switch to redundant system
controller upon software/hardware error
enable Configure security related options
end Exit Global Configuration mode
exception Configure core dump
exclude-subsystem Exclude copying a subsystem from the release
exit Exit from the current command mode
ftp-server Configure FTP Server characteristics
help Describe the interactive help system
host Add/modify an entry to the host table
hostname Set the host (system) name
interface Enter Interface Configuration mode
ip Configure IP characteristics
l2tp Configure L2TP parameters
license Configure licenses
line Enter Line Configuration mode
log Configure logging settings
macro Run a CLI macro
map-list Create an NBMA static map
memory Configure and administer memory operations
mpls Configure MPLS global parameters
no Negate a command or set its default(s)
ntp Configure the Network Time Protocol
policy-list Enter Policy Configuration mode
pppoe Configure PPPoE
profile Specify a profile
radius Configure RADIUS server
rate-limit-profile Enter rate limit profile configuration mode
redundancy Perform a redundancy configuration
route-map Configure a route map
router Configure a routing protocol
rtr Configure rtr parameters
service Configure system-level services
set Configure
sleep Make the Command Interface pause for a specified duration
slot Configure and administer slot operation
snmp-server Configure SNMP parameters
sscc The SSC Client
telnet telnet daemon configuration
timing Configure network timing
traffic-shape-profile Enter traffic shape profile configuration mode
virtual-router Specify a virtual router
host1:western:eastern(config)#
host1:western(config-vrf)#?
exit Exit from the current command mode
export Specify VRF export characteristics
help Describe the interactive help system
import Specify VRF import characteristics
log Configure logging settings
macro Run a CLI macro
no Negate a command or set its default(s)
rd Specify route distinguisher
route-target Specify VPN extended community Target
sleep Make the Command Interface pause for a
specified duration
host1:western(config-vrf)#
- Access a VR to configure it with an interior gateway protocol (IGP) or exterior gateway protocol (EGP) to learn routes from a customer edge device (CE). See the related routing protocol chapters for detailed information.
Example 1
VR with an IGP
host1(config)#virtual-router miami
host1:miami(config)#router ospf 5
host1:miami(config-router)#
Example 2
VR with an EGP
host1(config)#virtual-router western
host1:western(config)#router bgp 359
host1:western(config-router)#
host1(config)#virtual-router boston
host1(config)#telnet listen port 23
host1#show virtual-router
Virtual Router : default
Virtual Router : thursday
Virtual Router : western
VRF : eastern
Virtual Router : boston
Virtual Router : miami
Virtual Router : northern
VRF : southern
host1#
host1(config)#aaa domain-map jacksonville
host1(config-domain-map)#virtual-router western
host1(config-domain-map)#
aaa domain-map
host1-0-1-90(config)#aaa domain-map juniper.net vrouter_1
host1-0-1-90(config)#aaa domain-map none vrouter__all_purpose
host1-0-1-90(config)#aaa domain-map DEFAULT vrouter_all_purpose
ip vrf
- Use to create a VRF or access VRF Configuration mode to configure a VRF.
- You must specify a route distinguisher after you create a VRF. Otherwise, the VRF will not operate.
- Example
host1-00-02-80:boston(config)#ip vrf vpn-A
telnet listen
host1(config)#virtual-router 3
host1(config)#telnet listen port 3223
virtual-router
- From Global Configuration mode, use this command to create a virtual router or access the context of a previously created virtual router or a VRF.
- From Domain Map Configuration mode, use this command to map the VR to a user domain name. Use the no version in this mode to delete the VR parameter and assign the default VR.
- A VR name consists of up to 15 alphanumeric characters.
- Once you are in the context of a particular VR or VRF (indicated by the change in the prompt), all subsequent commands you enter apply to that context until you exit the context.
- Use the no version of the command only to delete the VR and return the system to the default VR. Issuing the command no virtual-router vrName.vrfName has no effect.
- Issuing a no version of this command (no virtual-router :vrfName or no virtual-router vrName:vrfName) that specifies an existing VRF only displays the error message: "Cannot delete a VRF with this command." You must use the no ip vrf command to remove a VRF.
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