7.1. 配置EIGRP
提問 配置網絡使用EIGRP路由協議
回答
Router1#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router1(config)#interface Ethernet0
Router1(config-if)#ip address 192.168.20.1 255.255.255.0
Router1(config-if)#exit
Router1(config)#interface Serial0.1 point-to-point
Router1(config-subif)#ip address 172.25.2.2 255.255.255.252
Router1(config-subif)#exit
Router1(config)#router eigrp 55
Router1(config-router)#network 172.25.0.0
Router1(config-router)#network 192.168.20.0
Router1(config-router)#exit
Router1(config)#end
Router1#
注釋 要確保啟用此路由協議的所有路由器配置的EIGRP后面的進程號相同，可以使用show ip eigrp neighbors 來驗證鄰居關系。同時支持network 192.168.20.0 0.0.0.255 來定義發布的網絡
7.2. 路由過濾
提問 對EIGRP學到或者宣告的路由進行過濾
回答
入方向過濾
Router2#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router2(config)#access-list 34 deny 192.168.30.0
Router2(config)#access-list 34 permit any
Router2(config)#router eigrp 55
Router2(config-router)#distribute-list 34 in Serial0.1
Router2(config-router)#exit
Router2(config)#end
Router2#
出方向過濾
Router1#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router1(config)#access-list 57 permit 172.25.1.0
Router1(config)#access-list 57 deny any
Router1(config)#router eigrp 55
Router1(config-router)#distribute-list 57 out Serial0/0.2
Router1(config-router)#exit
Router1(config)#end
Router1#
使用PRefix方式過濾，并且支持gateway 選項
Router9#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router9(config)#ip prefix-list ALLOWED-PREFIXES permit 10.0.0.0/8 le 32
Router9(config)#ip prefix-list ALLOWED-PREFIXES deny 0.0.0.0/0 le 32
Router9(config)#ip prefix-list ALLOWED-NEIGHBORS permit 172.18.19.1/32
Router9(config)#ip prefix-list ALLOWED-NEIGHBORS permit 172.18.19.4/32
Router9(config)#ip prefix-list ALLOWED-NEIGHBORS deny 0.0.0.0/0 le 32
Router9(config)#router eigrp 55
Router9(config-router)#distribute-list prefix ALLOWED-PREFIXES gateway ALLOWED-NEIGHBORS in
Router9(config-router)#exit
Router9(config)#end
Router9#
注釋 在路由過濾時推薦使用prefix方式而不用ACL形式。Gateway參數只能用于入方向控制，同時建議不用和interface混和使用
7.3. 再發布路由到EIGRP
提問 再發布其他方式學到的路由到EIGRP路由進程
回答
Router1#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router1(config)#router eigrp 55
Router1(config-router)#redistribute rip
Router1(config-router)#default-metric 1000 100 250 100 1500
Router1(config-router)#exit
Router1(config)#end
Router1#
注釋 假如再發布的是靜態路由可以不用配置default-metric命令，對于其他協議都必須配置此命令否則無法成功再發布。再發布之前也可以使用過濾列表進行路由過濾，從而只再發布特定路由
Router1(config)#router eigrp 55
Router1(config-router)#redistribute ospf 99
Router1(config-router)#distribute-list 7 out ospf 99
7.4. 使用Route Map方式來配置再發布
提問 使用控制粒度更好的Route Map方式來配置再發布
回答
Router1#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router1(config)#ip route 192.168.10.0 255.255.255.0 172.22.1.4
Router1(config)#ip route 192.168.11.0 255.255.255.0 172.22.1.4
Router1(config)#ip route 192.168.12.0 255.255.255.0 172.22.1.4
Router1(config)#access-list 20 permit 192.168.10.0
Router1(config)#access-list 21 permit 192.168.11.0
Router1(config)#route-map STATIC permit 10
Router1(config-route-map)#match ip address 20
Router1(config-route-map)#set metric 56 100 255 1 1500
Router1(config-route-map)#set tag 2
Router1(config-route-map)#exit
Router1(config)#route-map STATIC permit 20
Router1(config-route-map)#match ip address 21
Router1(config-route-map)#set metric 128 200 255 1 1500
Router1(config-route-map)#exit
Router1(config)#route-map STATIC deny 30
Router1(config-route-map)#exit
Router1(config)#router eigrp 55
Router1(config-router)#redistribute static route-map STATIC
Router1(config-router)#exit
Router1(config)#end
Router1#
注釋 此處配置和前面6.3的配置差不多，唯一需要注重的就是前面提到的必須要加上metric的設置
7.5. 特定接口禁止EIGRP
提問 禁止某個端口參與EIGRP
回答
Router1#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router1(config)#router eigrp 55
Router1(config-router)#passive-interface Serial0/1
Router1(config-router)#exit
Router1(config)#end
Router1#
注釋 這里的被動接口和RIP不同，由于結果是不能形成鄰居在此接口所以使用該命令以后就不能發送也不能接收路由信息
7.6. 調整EIGRP度量值
提問 修改學到的EIGRP路由器度量值
回答
Router1#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router1(config)#access-list 22 permit 192.168.30.0
Router1(config)#access-list 33 permit 192.168.30.0
Router1(config)#router eigrp 55
Router1(config-router)#offset-list 33 out 10000 Serial0.1
Router1(config-router)#offset-list 22 in 10000 Serial0.1
Router1(config-router)#exit
Router1(config)#end
Router1#
注釋
7.7. 定時器調整
提問 調整定時器優化收斂
回答
Router1#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router1(config)#interface Serial0.1
Router1(config-subif)#ip hello-interval eigrp 55 3
Router1(config-subif)#ip hold-time eigrp 55 9
Router1(config-subif)#exit
Router1(config)#end
Router1#
注釋 EIGRP的一個特性就是定時器的調整可以基于端口，并且不用保持整個網絡中所有設備的定時器設置一致，各個定時器都是獨立的
7.8. 啟用EIGRP認證
提問 增強路由信息安全性
回答
Router1#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router1(config)#key chain ORA
Router1(config-keychain)#key 1
Router1(config-keychain-key)#key-string oreilly
Router1(config-keychain-key)#exit
Router1(config-keychain)#exit
Router1(config)#interface Serial0/1
Router1(config-if)#ip authentication mode eigrp 55 md5
Router1(config-if)#ip authentication key-chain eigrp 55 ORA
Router1(config-if)#exit
Router1(config)#end
Router1#
注釋 注重這里只是認證不是加密路由信息包。下面提供一種更改key方法，幫助網絡平穩過渡到新的key
Router1#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router1(config)#key chain Mars
Router1(config-keychain)#key 1
Router1(config-keychain-key)#key-string rocket
Router1(config-keychain-key)#accept-lifetime
Router1(config-keychain-key)#send-lifetime
Router1(config-keychain-key)#key 2
Router1(config-keychain-key)#key-string martian
Router1(config-keychain-key)#accept-lifetime
Router1(config-keychain-key)#send-lifetime
Router1(config-keychain-key)#end
Router1#
7.9. 配置EIGRP路由匯總
提問 通過路由匯總來減少路由表大小和增強穩定性
回答
Router1#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router1(config)#interface Serial0/0.2
Router1(config-subif)#ip summary-address eigrp 55 172.25.0.0 255.255.0.0
Router1(config-subif)#exit
Router1(config)#end
Router1#
缺省會自動路由匯總，使用no auto-summary關閉（12.2(8)T后自動關閉）
同時可以配置匯總路由的同時，宣告部分子網路由
Router9# configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router9(config)#ip prefix-list 10.5.5/24 permit 10.5.5.0/24
Router9(config)#route-map LEAK10-5-5 permit 10
Router9(config-route-map)#match ip address prefix-list 10.5.5/24
Router9(config-route-map)#exit
Router9(config)#interface Serial0/0
Router9(config-if)#ip summary-address eigrp 55 10.5.0.0 255.255.0.0 leak-map LEAK10-5-5
Router9(config-if)#exit
Router9(config)#end
Router9#
注釋 路由匯總也是EIGRP的特性之一，可以配置在任意路由器的接口進行匯總，不象OSPF那樣只能在ABR匯總。匯總路由的度量值和所匯總路由中的最好的子網路由的度量值一致。Leakmap特性在12.3(14)T后引入，可以在匯總路由的同時發布某些更匹配的路由
7.10. 記錄鄰居狀態變化
提問 記錄鄰居狀態變化
回答
Router1#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router1(config)#router eigrp 55
Router1(config-router)#eigrp log-neighbor-changes
Router1(config-router)#exit
Router1(config)#end
Router1#
注釋 缺省開啟
<!--[if !supportLists]-->7.11. <!--[endif]-->限制EIGRP路由更新占用帶寬
提問 限制EIGRP路由更新占用帶寬的百分比
回答
Router1#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router1(config)#interface Serial0.1
Router1(config-subif)#ip bandwidth-percent eigrp 55 40
Router1(config-subif)#exit
Router1(config)#end
Router1#
注釋 這里的百分比可以大于100％，當我們人為的設定了某端口帶寬用于計算度量值時
7.12. EIGRP Stub路由
提問 向邊緣網絡發布較小的路由表
回答
Router1#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router1(config)#router eigrp 55
Router1(config-router)#eigrp stub
Router1(config-router)#exit
Router1(config)#end
Router1#
注釋
7.13. 路由標簽
提問 通過對特定路由進行標簽，防止再分發時出現路由回環
回答
Router1#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router1(config)#ip route 0.0.0.0 0.0.0.0 172.25.1.1
Router1(config)#access-list 7 permit 0.0.0.0
Router1(config)#route-map TAGGING permit 10
Router1(config-route-map)#match ip address 7
Router1(config-route-map)#set tag 5
Router1(config-route-map)#exit
Router1(config)#router eigrp 55
Router1(config-router)#redistribute static route-map TAGGING
Router1(config-router)#exit
Router1(config)#end
Router1#
注釋
<!--[if !supportLists]-->7.14. <!--[endif]-->查看EIGRP狀態
提問 查看狀態命令
回答
Router1#show ip protocols
Router1#show ip route eigrp
Router1#show ip eigrp neighbors
Router1#show ip eigrp interfaces
Router9#show ip eigrp accounting
Router1#show ip eigrp topology
注釋 12.3(14)T引入了show ip eigrp accounting
Router9#show ip eigrp accounting
IP-EIGRP accounting for AS(55)/ID(172.18.5.9)
Total Prefix Count: 50 States: A-Adjacency, P-Pending, D-Down
State Address/Source Interface Prefix Restart Restart/
Count Count Reset(s)
A 172.20.10.1 Se0/0 1 0 0
A 172.18.19.1 Fa0/0 39 0 0
A 172.18.19.4 Fa0/0 1 0 0
A 172.18.19.6 Fa0/0 6 0 0
Router9#
Router1#show ip eigrp topology
IP-EIGRP Topology Table for AS(55)/ID(172.25.25.1)
Codes: P - Passive, A - Active, U - Update, Q - Query, R - Reply,
r - reply Status, s - sia Status
P 0.0.0.0/0, 1 sUCcessors, FD is 28160, tag is 5
via Rstatic (28160/0)
via Summary (28160/0), Null0
P 10.2.2.0/24, 1 successors, FD is 156160
via 172.22.1.4 (156160/128256), FastEthernet0/1
P 10.1.1.0/30, 1 successors, FD is 3845120
via Connected, Serial0/1
P 192.168.10.0/24, 1 successors, FD is 28160, tag is 5
via Rstatic (28160/0)
P 192.168.30.0/24, 1 successors, FD is 156160
via 172.22.1.4 (156160/128256), FastEthernet0/1
P 192.168.20.0/24, 1 successors, FD is 2195456
via 172.25.2.2 (2195456/281600), Serial0/0.2
P 172.25.25.6/32, 1 successors, FD is 156160
via 172.25.1.7 (156160/128256), FastEthernet0/0.1
P 172.25.25.1/32, 1 successors, FD is 128256
via Connected, Loopback0
P 172.25.25.2/32, 1 successors, FD is 2297856
via 172.25.2.2 (2297856/128256), Serial0/0.2
P 172.25.1.0/24, 1 successors, FD is 28160
via Connected, FastEthernet0/0.1
P 172.25.2.0/30, 1 successors, FD is 2169856
via Connected, Serial0/0.2
P 172.22.1.0/24, 1 successors, FD is 28160
via Connected, FastEthernet0/1
Router1#
新聞熱點
疑難解答
