Cisco Router IOS XR Manuale Utente Scaricare il pdf (Pagina 71)

Cisco IOS XR Training Page 71

20. VRF lite and Dot1Q Trunks

Ok, time for some VRF lite basics and we can throw in some Dot1Q trunks to go

with it.

First, let’s create our VRF called LAB

RP/0/7/CPU0:R1(config)#vrf LAB

Now we need to enable the address family for this VRF, there IPv4 Unicast

RP/0/7/CPU0:R1(config-vrf)#address-family ipv4 un

RP/0/7/CPU0:R1(config-vrf-af)#exit

Now we need to enable the IPv6 address family for this VRF

RP/0/7/CPU0:R1(config-vrf)#address-family ipv6 unicast

Now we can create our Dot1Q trunk to the other router:

RP/0/7/CPU0:R1(config-vrf-af)#int g0/3/0/3.100

Little different then IOS, but this actually makes more sense

RP/0/7/CPU0:R1(config-subif)#dot1q vlan 100

RP/0/7/CPU0:R1(config-subif)#ip add 150.1.21.1/24

RP/0/7/CPU0:R1(config-subif)#ipv6 add 2001:1:1:21::1/64

RP/0/7/CPU0:R1(config-subif)#vrf LAB

Notice that I applied the VRF LAB command after configuring the IP addresses.

If this was IOS, I would have lost all that work – but since its IOS XR,

nothing takes effect until after you COMMIT the changes. 

Lets look at what will be applied and then commit it.

RP/0/7/CPU0:R1(config-subif)#show config

Fri Mar 30 14:12:06.649 UTC

Building configuration...

!! IOS XR Configuration 4.1.1

vrf LAB

address-family ipv4 unicast

address-family ipv6 unicast

interface GigabitEthernet0/3/0/3.100

vrf LAB

ipv4 address 150.1.21.1 255.255.255.0

ipv6 address 2001:1:1:21::1/64

dot1q vlan 100

end

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Cisco Router IOS XR Manuale Utente Pagina 71