Linkmeup_R1

hostname Linkmeup_R1

!

interface Loopback0

 ip address 1.1.1.1 255.255.255.255

 ip router isis 1

!

interface GigabitEthernet1

 description to Linkmeup_R2

 ip address 10.0.12.1 255.255.255.0

 ip router isis 1

 negotiation auto

 mpls ip

!

interface GigabitEthernet3

 description to Blue-A

 no ip address

 negotiation auto

 xconnect 4.4.4.4 127 encapsulation mpls

!

router isis 1

 net 10.0000.0000.0001.00

Linkmeup_R2

hostname Linkmeup_R2

!

interface Loopback0

 ip address 2.2.2.2 255.255.255.255

 ip router isis 1

!

interface GigabitEthernet1

 description to Linkmeup_R3

 ip address 10.0.23.2 255.255.255.0

 ip router isis 1

 negotiation auto

 mpls ip

!

interface GigabitEthernet2

 description to Linkmeup_R1

 ip address 10.0.12.2 255.255.255.0

 ip router isis 1

 negotiation auto

 mpls ip

!

router isis 1

 net 10.0000.0000.0002.00

Linkmeup_R3

hostname Linkmeup_R3

!

interface Loopback0

 ip address 3.3.3.3 255.255.255.255

 ip router isis 1

!

interface GigabitEthernet1

 description to Linkmeup_R4

 ip address 10.0.34.3 255.255.255.0

 ip router isis 1

 negotiation auto

 mpls ip

!        

interface GigabitEthernet2

 description to Linkmeup_R2

 ip address 10.0.23.3 255.255.255.0

 ip router isis 1

 negotiation auto

 mpls ip

!

router isis 1

 net 10.0000.0000.0003.00

Linkmeup_R4

hostname Linkmeup_R4

!

interface Loopback0

 ip address 4.4.4.4 255.255.255.255

 ip router isis 1

!

interface GigabitEthernet1

 no ip address

 shutdown

 negotiation auto

!

interface GigabitEthernet2

 description to Linkmeup_R3

 ip address 10.0.34.4 255.255.255.0

 ip router isis 1

 negotiation auto

 mpls ip

!

interface GigabitEthernet3

 description to Blue-B

 no ip address

 negotiation auto

 xconnect 1.1.1.1 127 encapsulation mpls

!

router isis 1

 net 10.0000.0000.0004.00