Scenario 1 Results On R3, interface Tunnel2 is up. ! hostname R3

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Scenario 1 Results On R3, interface Tunnel2 is up. ! hostname R3 Lo0: 172.18.255.2 R2 Lo0: 172.18.255.1 R3 Lo0: 172.18.255.5 S0/0 .14 S0/2 .13 Fa0/0 .5 Fa0/0 .6 172.18.253.12/30 172.18.253.4/30 ! hostname R3 mpls traffic-eng tunnels interface Loopback0 ip address 172.18.255.5 255.255.255.255 interface Tunnel2 description *** TE Tunnel to R1 *** ip unnumbered Loopback0 tag-switching ip tunnel destination 172.18.255.2 tunnel mode mpls traffic-eng tunnel mpls traffic-eng autoroute announce tunnel mpls traffic-eng priority 1 1 tunnel mpls traffic-eng path-option 1 explicit name path_to_R1 tunnel mpls traffic-eng record-route router ospf 100 mpls traffic-eng router-id Loopback0 mpls traffic-eng area 0 router-id 172.18.255.5 network 172.18.253.6 0.0.0.0 area 0 network 172.18.255.5 0.0.0.0 area 0 ip explicit-path name path_to_R1 enable next-address 172.18.253.5 next-address 172.18.253.14 Results On R3, interface Tunnel2 is up.

Scenario 2 Results On R3, interface Tunnel2 is down. ! hostname R3 Lo0: 172.18.255.2 R2 Lo0: 172.18.255.1 R3 Lo0: 172.18.255.5 S0/0 .14 S0/2 .13 172.18.253.12/30 Fa0/0 .5 Fa0/0 .6 .54 .53 172.18.253.4/30 172.18.253.52/30 S0/1 S0/1 Results On R3, interface Tunnel2 is down. ! hostname R3 mpls traffic-eng tunnels interface Loopback0 ip address 172.18.255.5 255.255.255.255 interface Tunnel2 description *** TE Tunnel to R1 *** ip unnumbered Loopback0 tag-switching ip tunnel destination 172.18.255.2 tunnel mode mpls traffic-eng tunnel mpls traffic-eng autoroute announce tunnel mpls traffic-eng priority 1 1 tunnel mpls traffic-eng path-option 1 explicit name path_to_R1 tunnel mpls traffic-eng record-route router ospf 100 mpls traffic-eng router-id Loopback0 mpls traffic-eng area 0 router-id 172.18.255.5 network 172.18.253.6 0.0.0.0 area 0 network 172.18.255.5 0.0.0.0 area 0 ip explicit-path name path_to_R1 enable next-address 172.18.253.5 next-address 172.18.255.2 R3#sh mpls traffic-eng tunnels tu2 Name: *** TE Tunnel to R1... (Tunnel2) Destination: 172.18.255.2 Status: Admin: up Oper: down Path: not valid Signalling: Down path option 1, type explicit path_to_R1 Config Parameters: Bandwidth: 0 kbps (Global) Priority: 1 1 Affinity: 0x0/0xFFFF Metric Type: TE (default) AutoRoute: enabled LockDown: disabled Loadshare: 0 bw-based auto-bw: disabled Shortest Unconstrained Path Info: Path Weight: 65635 (TE) Explicit Route: 172.18.253.5 172.18.253.54 172.18.255.2 History: Tunnel: Time since created: 59 minutes, 35 seconds Time since path change: 3 minutes, 22 seconds Prior LSP: ID: path option 1 [111] Removal Trigger: configuration changed Last Error: PCALC:: No addresses to connect 172.18.253.5 to 172.18.255.2 R3#