Чтение онлайн

r1(config-router)#end

r1#wr

EIGRP

фильтрация

с

офсет

листом

(Filtering with Offset-List)

В EIGRP при помощи офсет листа можно изменить метрику, данные действия показаны ниже:

r4#sh ip route 10.3.3.3

Routing entry for 10.3.3.3/32

Known via "eigrp 1", distance 90, metric 409600, type internal

Redistributing via eigrp 1

Last update from 10.0.34.3 on FastEthernet0/0, 00:00:41 ago

Routing Descriptor Blocks:

* 10.0.34.3, from 10.0.34.3, 00:00:41 ago, via FastEthernet0/0

Route metric is 409600, traffic share count is 1

Total delay is 6000 microseconds, minimum bandwidth is 10000 Kbit

Reliability 255/255, minimum MTU 1500 bytes

Loading 1/255, Hops 1

r3(config)#access-list 1 permit 10.3.3.3

r3(config)#router eigrp 1

r3(config-router)#offset-list 1 out 2147483647

r4#sh ip route 10.3.3.3

Routing entry for 10.3.3.3/32

Known via "eigrp 1", distance 90, metric 2147893247, type internal

Redistributing via eigrp 1

Last update from 10.0.34.3 on FastEthernet0/0, 00:00:05 ago

Routing Descriptor Blocks:

* 10.0.34.3, from 10.0.34.3, 00:00:05 ago, via FastEthernet0/0

Route metric is 2147893247, traffic share count is 1

Total delay is 83892079 microseconds, minimum bandwidth is 10000 Kbit

Reliability 255/255, minimum MTU 1500 bytes

Loading 1/255, Hops 1

Если маршрутизатор указан как Stub, то соседи не посылают ему запросы о маршрутах.

r1(config)#route-map conn permit 10

r1(config-route-map)#match interface loopback10 loopback100

r1(config-route-map)#router eigrp 1

r1(config-router)#redistribute connected route-map conn

r1(config-router)#eigrp stub connected summary

Проверка осуществляется командами:

r4#show ip route eigrp | include EX

D EX 10.0.10.1/32 [170/435200] via 10.0.34.3, 00:39:29,FastEthernet0/0

D EX 10.0.100.1/32 [170/435200] via 10.0.34.3,00:39:29,FastEthernet0/0

r2#show ip eigrp neighbors detail

IP-EIGRP neighbors for process 1

H Address Interface Hold Uptime SRTT RTO Q Seq

(sec) (ms) Cnt Num

0 10.0.12.1 Fa0/0 14 00:44:27 97 582 0 146

Version 12.4/1.2, Retrans: 0, Retries: 0, Prefixes: 4

Stub Peer Advertising ( CONNECTED SUMMARY ) Routes

Suppressing queries

1 10.0.24.4 Fa0/1 11 19:45:37 86 516 0 197

Version 12.4/1.2, Retrans: 6, Retries: 0, Prefixes: 4

EIGRP

фильтрация

с

закрытой

областью

c leak

картой

(Filtering with Stub Routing and Leak Map)

Не рекламирует маршрут 10.0.10.0/24

r1(config)#router eigrp 1

r1(config-router)#network 10.0.10.0 0.0.0.0

r1(config)#ip prefix-list lo10 seq 5 permit 10.0.10.0/24

r1(config)#route-map stub_leak_map deny 10

r1(config-route-map)#match ip address prefix-list lo10

r1(config-route-map)#route-map stub_leak_map permit 20

r1(config-route-map)#router eigrp 1

r1(config-router)#eigrp stub connected leak-map stub_leak_map

Проверка осуществляется командами:

r2#show ip eigrp neighbors detail

IP-EIGRP neighbors for process 1

H Address Interface Hold Uptime SRTT RTO Q Seq

(sec) (ms) Cnt Num 0 10.0.12.1 Fa0/0 14 00:00:19 95 570 0 183

Version 12.4/1.2, Retrans: 0, Retries: 0, Prefixes: 4

Stub Peer Advertising ( CONNECTED ) Routes

Suppressing queries

r4#sh ip route eigrp

10.0.0.0/8 is variably subnetted, 8 subnets, 2 masks

D 10.0.12.0/24 [90/307200] via 10.0.24.2, 00:02:44, FastEthernet0/1

D 10.0.13.0/24 [90/307200] via 10.0.34.3, 00:02:44, FastEthernet0/0

D 10.2.2.2/32 [90/409600] via 10.0.24.2, 01:39:31, FastEthernet0/1

D 10.3.3.3/32 [90/2147893247] via 10.0.34.3, 01:39:31,FastEthernet0/0

D 10.1.1.1/32 [90/435200] via 10.0.34.3, 00:02:44, FastEthernet0/0

[90/435200] via 10.0.24.2, 00:02:44, FastEthernet0/1

EIGRP позволяет балансировать нагрузку к определённой сети, загружать оба доступных пути.

В последующих примерах используется приведённая ниже схема.

r1#sh ip route eigrp

10.0.0.0/8 is variably subnetted, 8 subnets, 2 masks

D 10.2.2.2/32 [90/2357760] via 10.0.13.3, 00:00:32, Serial0/1

D 10.3.3.3/32 [90/2306560] via 10.0.13.3, 00:00:31, Serial0/1

D 10.4.4.4/32 [90/2332160] via 10.0.13.3, 00:00:32, Serial0/1

D 10.0.24.0/24 [90/2229760] via 10.0.13.3, 00:00:32, Serial0/1

D 10.0.34.0/24 [90/2204160] via 10.0.13.3, 00:00:33, Serial0/1

В данном примере, мы устанавливаем на интерфейсах разную пропускную способность.

r1(config)# interface Serial0/0

r1(config-if)# bandwidth 256

r1(config-if)# interface Serial0/1

r1(config-if)# bandwidth 1280

r1#show ip eigrp topology 10.4.4.4 255.255.255.255

IP-EIGRP (AS 1): Topology entry for 10.4.4.4/32

State is Passive, Query origin flag is 1, 1 Successor(s), FD is 2665472

Routing Descriptor Blocks:

10.0.13.3 (Serial0/1), from 10.0.13.3, Send flag is 0x0

Composite metric is (2665472/409600), Route is Internal

Vector metric:

Minimum bandwidth is 1280 Kbit

Total delay is 26000 microseconds

Reliability is 255/255

Load is 1/255