Exam 350-401 topic 1 question 159 discussion

Removing the VRF also removes the configured IP address

Correct Answer is C. Just to add my vote to help clarify, once you remove the VRF from the interface, this also strips the IP address configuration previously configured, therefore remove the VRF and then configure the interface IP.

VRFs are not needed for "router on a stick", The Answer is C.

We need to remove VRF forwarding to advertise the VLAN networks from the global routing table. Inter-VLAN routing techniques: (1) Router on a stick: The router's interface connected to the switch, which has multiple VLANs, is configured to use subinterfaces to route traffic between the different VLANs). (2) SVI (switch virtual interface): A L3 switch routes traffic between the VLANs utilizing a virtual interface for each VLAN. The router will be used to advertise the VLAN networks to external networks. The example above is not a traditional router on a stick, It describes a Layer 3 switch configured with SVIs ('interface VLAN 10, 20, and 30' commands) to route traffic between the different VANs.

C is correct

hahaha, I thought it would configure a route leak between different VRFs, the answer told me just to delete the vrf directly!!

C ofcourse. - to be honest I like answer like this, "good feature, turn it off" :)

as I understood it the idea of the question to migrate all IPs to the global routing table (GRT) if so "C" scenario should work

C IPs will be removed, and we need to re-configure the IPs for each interface

Only correct answer is C. Remove VRF from interface definately remove interface IP address. Trick of this answer C is it add back interface IP address with other than .1 which trigger panic to us. By right it will not work as clients GW IP is pointing to .1. ( likely mistake in the question preparation)

I choose C IP is removed. and it does make sense too. too dangerous to keep the IP, what do we do if that IP is duplicated ? IOU7(config)#int vlan10 IOU7(config-if)#do sh run int vlan10 Building configuration... Current configuration : 88 bytes ! interface Vlan10 vrf forwarding Customer1 ip address 192.168.1.1 255.255.255.0 end IOU7(config-if)#no vrf forwarding Customer1 % Interface Vlan10 IPv4 disabled and address(es) removed due to enabling VRF IOU7(config-if)#do sh run int vlan10 Building configuration... Current configuration : 39 bytes ! interface Vlan10 no ip address end

Removing VRF doesn't remove ip address. It required the router to reboot in order remove the configuration from the show run.

A. interface Vlan10 no ip vrf forwarding Clients ! interface Vlan20 no ip vrf forwarding Servers ! interface Vlan30 no ip vrf forwarding Printers B. router eigrp 1 network 10.0.0.0 255.255.255.0 network 172.16.0.0 255.255.255.0 network 192.168.1.0 255.255.255.0 C. interface Vlan10 no ip vrf forwarding Clients ip address 192.168.1.2. 255.255.255.0 ! interface Vlan20 no ip vrf forwarding Servers ip address 172.16.1.2 255.255.255.0 ! interface Vlan30 no ip vrf forwarding Printers ip address 10.1.1.2 255.255.255.0 D. router eigrp 1 network 10.0.0.0 255.0.0.0 network 172.16.0.0 255.255.0.0 network 192.168.1.0 255.255.0.0

Provided Answer is correct. C

VRF is creating virtual router, there for there is no routing among those subnet, router on a stick is all subnet are creating in one router using sub interface or physical int but all int must be in one router

not like this, it does not interface Vlan20 no ip vrf forwarding Servers ip address 172.16.1.2 255.255.255.0

The given answer is correct