西荷听雨 2007-12-14 10:34
EIGRP 不同自治系统重发布
[img=393,197]http://www.one-tom.com/bbs/uploads/20071203_002440_eigrp8.gif[/img]
[b]基本配置如下[/b]
[b]＝＝＝＝＝＝＝＝[/b]
[b]Router One[/b]
router eigrp 2000
network 172.16.1.0 0.0.0.255
＝＝＝＝＝＝＝＝＝＝＝＝＝＝
[b]Router Two[/b]
router eigrp 2000
redistribute eigrp 1000 route-map to-eigrp2000
network 172.16.1.0 0.0.0.255
!
router eigrp 1000
redistribute eigrp 2000 route-map to-eigrp1000
network 10.1.0.0 0.0.255.255
route-map to-eigrp1000 deny 10
match tag 1000
!
route-map to-eigrp1000 permit 20
set tag 2000
!
route-map to-eigrp2000 deny 10
match tag 2000
!
route-map to-eigrp2000 permit 20
set tag 1000
＝＝＝＝＝＝＝＝＝＝
[b]Router Three[/b]
router eigrp 1000
network 10.1.0.0 0.0.255.255
[color=#0000ff]注意：路中从自治系统号为1000的EIGRP重发布到2000时，会被打上标志1000的标记。当路由从EIGRP 2000重分布到EIGRP1000时，带有Tag 1000的会拒绝掉。避免了环路的可能性[/color]
在路由器one上，我们可以看到
one# show ip eigrp topology 10.1.2.0 255.255.255.0
IP-EIGRP topology entry for 10.1.2.0/24
State is Passive, Query origin flag is 1, 1 Successor(s), FD is 46763776
Routing Descriptor Blocks:
20.1.1.1 (Serial0), from 20.1.1.1, Send flag is 0x0
Composite metric is (46763776/46251776), Route is External
Vector metric:
[color=#0000ff]Minimum bandwidth is 56 Kbit
[/color] Total delay is 41000 microseconds
Reliability is 255/255
Load is 1/255
Minimum MTU is 1500
Hop count is 2
External data:
Originating router is 10.1.2.1
AS number of route is 1000
External protocol is EIGRP, external metric is 46251776
Administrator tag is 1000 (0x000003E8)
[color=#0000ff]注意：尽管Routerone和Routertwo之间有一条带宽为1.544Mb，在这里显示的最小带宽是56k，意味着在两个EIGRP自治系统之间重发布后还保留着原来所有的Metric值。[/color]
