课题内容：使用route-map为路由设置标记
拓扑：
将R2的环回口重分布直连进入OSPF
在R1和R4上将OSPF重分布进入EIGRP
使用route-map，将R2的环回口路由（即OSPF的外部路由）设置路由标记为 6.6.6.6
将其它的OSPF内部路由设置路由标记为 8.8.8.8
要求在R3上看到的路由标记格式为 点分十进制
R2
router ospf 110
redistribute connected metric-type 1 subnets
验证：
R2#show ip ospf database | begin Type-5
Type-5 AS External Link States
Link ID ADV Router Age Seq# Checksum Tag
22.1.1.1 24.1.1.2 166 0x80000001 0x0030BB 0
在R1和R4上定义route-map
route-map O2E permit 10
match route-type internal //匹配OSPF的内部路由
set tag 8.8.8.8 //设置路由标记为 8.8.8.8
route-map O2E permit 20 定义第二条route-map
match route-type external type-1 //匹配OSPF外部路由类型 1
set tag 6.6.6.6 //设置路由标记为 6.6.6.6
route-map O2E permit 30 //不要忘记添加一条放行所有，以允许其它路由通过；当然，按需配置；
在重分布的时候调用 R1和R4
router eigrp 90
network 134.1.1.0 0.0.0.255
redistribute ospf 110 metric 1544 2000 255 1 1500 route-map O2E
验证：
R3#show ip route 22.1.1.1
Routing entry for 22.1.1.1/32
Known via "eigrp 90", distance 170, metric 2195456
Tag 101058054, type external
Redistributing via eigrp 90
Last update from 134.1.1.4 on Ethernet0/2, 00:00:39 ago
Routing Descriptor Blocks:
134.1.1.4, from 134.1.1.4, 00:00:39 ago, via Ethernet0/2
Route metric is 2195456, traffic share count is 1
Total delay is 21000 microseconds, minimum bandwidth is 1544 Kbit
Reliability 255/255, minimum MTU 1500 bytes
Loading 1/255, Hops 1
Route tag 101058054
* 134.1.1.1, from 134.1.1.1, 00:00:39 ago, via Ethernet0/2
Route metric is 2195456, traffic share count is 1
Total delay is 21000 microseconds, minimum bandwidth is 1544 Kbit
Reliability 255/255, minimum MTU 1500 bytes
Loading 1/255, Hops 1
Route tag 101058054
将R3的路由标记显示为 点分十进制：
R3(config)#route-tag notation dotted-decimal
R3#show ip route 22.1.1.1
Routing entry for 22.1.1.1/32
Known via "eigrp 90", distance 170, metric 2195456
Tag 6.6.6.6, type external
Redistributing via eigrp 90
Last update from 134.1.1.4 on Ethernet0/2, 00:01:52 ago
Routing Descriptor Blocks:
134.1.1.4, from 134.1.1.4, 00:01:52 ago, via Ethernet0/2
Route metric is 2195456, traffic share count is 1
Total delay is 21000 microseconds, minimum bandwidth is 1544 Kbit
Reliability 255/255, minimum MTU 1500 bytes
Loading 1/255, Hops 1
Route tag 6.6.6.6
* 134.1.1.1, from 134.1.1.1, 00:01:52 ago, via Ethernet0/2
Route metric is 2195456, traffic share count is 1
Total delay is 21000 microseconds, minimum bandwidth is 1544 Kbit
Reliability 255/255, minimum MTU 1500 bytes
Loading 1/255, Hops 1
Route tag 6.6.6.6
重分布的时候使用route-map可以更好的针对路由进行操控，同时也可以针对不同的路由内容做出区分；
比如：在R2上就可以针对不同的外部路由前缀使用前缀列表对其进行区分标记，以实现路由操控的灵活部署；
