EIGRP负载均衡实验
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EIGRP 负载均衡实验
R1:
iinterface Serial2/0
ip address 12.1.1.1 255.255.255.0
serial restart-delay 0
clock rate 64000
!
interface Serial2/1
ip address 13.1.1.1 255.255.255.0
serial restart-delay 0
clock rate 64000
router eigrp 100
network 0.0.0.0
no auto-summary R2:
interface FastEthernet0/0
ip address 23.1.1.1 255.255.255.0
duplex auto
speed auto
interface Serial2/0
ip address 12.1.1.2 255.255.255.0
serial restart-delay 0
router eigrp 100
network 0.0.0.0
no auto-summary
R3:
interface FastEthernet0/0
ip address 23.1.1.2 255.255.255.0
duplex auto
speed auto
interface Serial2/1
ip address 13.1.1.2 255.255.255.0
serial restart-delay 0
router eigrp 100
network 0.0.0.0
no auto-summary R3路由表:
R3#show ip rou
Gateway of last resort is not set
23.0.0.0/24 is subnetted, 1 subnets
C 23.1.1.0 is directly connected, FastEthernet0/0
12.0.0.0/24 is subnetted, 1 subnets
D 12.1.1.0 [90/2172416] via 23.1.1.1, 00:01:06, FastEthernet0/0 //去12.1.1.0网段via f0/0
13.0.0.0/24 is subnetted, 1 subnets
C 13.1.1.0 is directly connected, Serial2/1
R3#show ip eigrp to
IP-EIGRP Topology Table for AS(100)/ID(23.1.1.2)
Codes: P - Passive, A - Active, U - Update, Q - Query, R - Reply,
r - reply Status, s - sia Status
P 12.1.1.0/24, 1 successors, FD is 2172416
via 23.1.1.1 (2172416/2169856), FastEthernet0/0
via 13.1.1.1 (2681856/2169856), Serial2/1
P 13.1.1.0/24, 1 successors, FD is 2169856
via Connected, Serial2/1
P 23.1.1.0/24, 1 successors, FD is 28160
via Connected, FastEthernet0/0 //拓扑表中有两条可以到12.1.1.0网段的路径,F0/0和S1/1,经过s1/1那条路径的AD小于正在使用路由条目的FD2172416,所以被选为FS放在拓扑表中.
要想实验负载均衡,可以用的办法:
等价负载均衡(1):使得metric值相同
1.改带宽(不推荐,因为改带宽要用107 去除,会得到小数,)
2.改延迟,在R3上改f0/0 或s1/1其中的一个
R3#show inter f0/0
FastEthernet0/0 is up, line protocol is up
Hardware is AmdFE, address is cc02.07fc.0000 (bia cc02.07fc.0000)
Internet address is 23.1.1.2/24
MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
-----------------------------------------------------------------------
R3#show int s2/1
Serial2/1 is up, line protocol is up
Hardware is M4T
Internet address is 13.1.1.2/24
MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec,
先改s2/1
R3(config-if)#delay ?
<1-16777215> Throughput delay (tens of microseconds) 延迟路由器会自动乘以10所以这里要改成和f0/0 的DLY一样只需
R3(config-if)#delay 10
R3#clear ip eigrp neighbors
邻居关系重新建立
R3#show ip eigrp to
IP-EIGRP Topology Table for AS(100)/ID(23.1.1.2)
Codes: P - Passive, A - Active, U - Update, Q - Query, R - Reply,
r - reply Status, s - sia Status
P 12.1.1.0/24, 2 successors, FD is 2172416
via 13.1.1.1 (2172416/2169856), Serial2/1
via 23.1.1.1 (2172416/2169856), FastEthernet0/0
P 13.1.1.0/24, 1 successors, FD is 1660416
via Connected, Serial2/1
P 23.1.1.0/24, 1 successors, FD is 28160
via Connected, FastEthernet0/0
R3#show ip route
Gateway of last resort is not set
23.0.0.0/24 is subnetted, 1 subnets
C 23.1.1.0 is directly connected, FastEthernet0/0
12.0.0.0/24 is subnetted, 1 subnets
D 12.1.1.0 [90/2172416] via 23.1.1.1, 00:01:08, FastEthernet0/0
[90/2172416] via 13.1.1.1, 00:01:08, Serial2/1 13.0.0.0/24 is subnetted, 1 subnets
C 13.1.1.0 is directly connected, Serial2/1
metric值已经相同,路由表中有两条路由,负载均衡成功!
当然也可以修改f0/0
R3(config)#int f0/0
R3(config-if)#delay 2000 一样可能达到负载均衡的效果
等价负载均衡(2): offset-list
P 12.1.1.0/24, 1 successors, FD is 2172416
via 23.1.1.1 (2172416/2169856), FastEthernet0/0
via 13.1.1.1 (2681856/2169856), Serial2/1
R3(config)#access-list 1 permit 12.1.1.0
R3(config)#router eigrp 100
R3(config-router)#offset-list 1 in 509440 f0/0
在这里只能改小的,大的减小的即为偏移的值,其中有个参数”in”,如果对自己产生影响用”in”如果对外面产生影响用”out”,509440是偏移值,后面还有个接口,是说,在这个接口上加上偏移值,如果不定义接口,默认在所有接口加偏移值.
R3#show ip rout
Gateway of last resort is not set
23.0.0.0/24 is subnetted, 1 subnets C 23.1.1.0 is directly connected, FastEthernet0/0
12.0.0.0/24 is subnetted, 1 subnets
D 12.1.1.0 [90/2681856] via 23.1.1.1, 00:00:04, FastEthernet0/0
[90/2681856] via 13.1.1.1, 00:00:04, Serial2/1
13.0.0.0/24 is subnetted, 1 subnets
C 13.1.1.0 is directly connected, Serial2/1
不等价负载均衡:variance
P 12.1.1.0/24, 1 successors, FD is 2172416
via 23.1.1.1 (2172416/2169856), FastEthernet0/0
via 13.1.1.1 (2681856/2169856), Serial2/1
R3(config)#router eigrp 100
R3(config-router)#var
R3(config-router)#variance ?
<1-128> Metric variance multiplier
R3(config-router)#variance 2
R3#show ip rou
Gateway of last resort is not set
23.0.0.0/24 is subnetted, 1 subnets
C 23.1.1.0 is directly connected, FastEthernet0/0
12.0.0.0/24 is subnetted, 1 subnets
D 12.1.1.0 [90/2172416] via 23.1.1.1, 00:00:45, FastEthernet0/0