跨区域的 TE tunnel 的建立
松散下一跳（*）：ABR 作为松散下一跳
只有 OSPF 和 ISIS 方可支持
需要注意的问题：
只能用 Explicit-path
不能用 autoroute 的方面发布 tunnel
r1(config)#ip explicit-path name T5
r1(cfg-ip-expl-path)#next-address 12.1.1.2
r1(cfg-ip-expl-path)#next-address loose 3.3.3.3（指向 ABR 的节点地址即可）
r3(config-router)#mpls traffic-eng area 1
r3(config-router)#mpls traffic-eng area 0
r1#show mpls traffic-eng tunnels tunnel 15
Name: r1_t15 (Tunnel15) Destination: 5.5.5.5
Status:
Admin: up Oper: up Path: valid Signalling: connected
path option 10, type explicit T5 (Basis for Setup, path weight 20)
Config Parameters:
Band 500 kbps (Global) Priority: 7 7 Affinity: 0x0/0xFFFF
Metric Type: TE (default)
AutoRoute: disabled LockDown: disabled Loadshare: 500 bw-based
auto-bw: disabled
Active Path Option Parameters:
State: explicit path option 10 is active
BandwidthOverride: disabled LockDown: disabled Verbatim: disabled
InLabel : -
OutLabel : Ethernet0/0.12, 16
RSVP Signalling Info:
Src 1.1.1.1, Dst 5.5.5.5, Tun_Id 15, Tun_Instance 69
RSVP Path Info:
My Address: 12.1.1.1
Explicit Route: 12.1.1.2 23.1.1.2 23.1.1.3 3.3.3.3
Record Route: NONE
Tspec: ave rate=500 kbits, burst=1000 bytes, peak rate=500 kbits
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