command "ip vrf" vs "vrf"

paulingsmile · ‎04-25-2010

Hi all,

What are the difference between "ip vrf" and "vrf"? Is there any disadvantage on the system if I change the configuration from "ip vrf" to "vrf'? Thanks

Federico Coto Fajardo · ‎04-25-2010

Hi Paul,

Are you referring to an IOS device?

The ''ip vrf'' command is to configure the a VRF and to assign a VRF to an interface.

Which commands do you want to change from ''ip vrf'' to ''vrf''?

(and just out of curiosity, is there a special reason for wanting this?)

Federico.

paulingsmile · ‎04-25-2010

Hi Federico,

We are using a Cisco 3845 router. Currently, we are having a testing on IPv6 network, but "ip vrf" doesn't fit with IPv6, we have to use the command "vrf" instead. We are planning to change all vrf defined with "ip vrf" command to new vrf with the new command "vrf", but we need to know what would the effect on the router, thanks for you help.

Paul

paulingsmile · ‎04-25-2010

Hi Federico,

The new command for defining a vrf should be "vrf definition", what is the diffience between this new command and "ip vrf"? Thanks!

Paul

paulingsmile · ‎04-26-2010

The command “ip vrf” is used to create a single-protocol IPv4-only VRF, and “vrf definition” is for creating a multiprotocol VRF. There is a command (“vrf upgrade-cli multi-af-mode common-policies”) that automatically converts the IPv4 VRF commands into multiprotocol VRF commands without any service impact.

http://www.cisco.com/en/US/docs/ios/mpls/configuration/guide/mp_vpn_ipv4_ipv6.html#wp1054927

Thanks all.