Дибров М.В., Кузьменко Н.Г., Журавлев А.А. Маршрутизаторы
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BGP activity 53/20 prefixes, 73/25 paths, scan interval 60 secs
Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down State/PfxRcd
10.95.1.4 4 65010 14 13 100 0 0 00:08:01 8
10.95.1.5 4 65010 11 10 100 0 0 00:05:32 8
10.95.2.3 4 65010 30 32 100 0 0 00:19:01 6
10.95.2.6 4 65010 8 7 100 0 0 00:02:30 8
10.95.2.7 4 65010 6 5 100 0 0 00:00:50 8
172.16.1.1 4 65001 66 63 100 0 0 00:41:06 2
172.16.1.17 4 65002 66 63 100 0 0 00:41:06 2
r4#show ip bgp summary
BGP router identifier 10.95.1.4, local AS number 65010
BGP table version is 47, main routing table version 47
33 network entries using 3861 bytes of memory
43 path entries using 2236 bytes of memory
6/3 BGP path/bestpath attribute entries using 744 bytes of memory
0 BGP route-map cache entries using 0 bytes of memory
0 BGP filter-list cache entries using 0 bytes of memory
BGP using 6841 total bytes of memory
BGP activity 33/0 prefixes, 43/0 paths, scan interval 60 secs
Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down State/PfxRcd
10.95.1.2 4 65010 13 14 47 0 0 00:08:47 6
10.95.1.5 4 65010 12 12 47 0 0 00:06:19 7
10.95.2.3 4 65010 13 14 47 0 0 00:08:14 6
10.95.2.6 4 65010 9 9 47 0 0 00:03:19 8
10.95.2.7 4 65010 7 7 47 0 0 00:01:29 8
r5#show ip bgp summary
BGP router identifier 10.95.1.5, local AS number 65010
BGP table version is 47, main routing table version 47
33 network entries using 3861 bytes of memory
43 path entries using 2236 bytes of memory
6/3 BGP path/bestpath attribute entries using 744 bytes of memory
0 BGP route-map cache entries using 0 bytes of memory
0 BGP filter-list cache entries using 0 bytes of memory
BGP using 6841 total bytes of memory
BGP activity 33/0 prefixes, 43/0 paths, scan interval 60 secs
Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down State/PfxRcd
10.95.1.2 4 65010 11 12 47 0 0 00:06:45 6
10.95.1.4 4 65010 12 12 47 0 0 00:06:46 7
10.95.2.3 4 65010 11 12 47 0 0 00:06:30 6
10.95.2.6 4 65010 9 9 47 0 0 00:03:36 8
10.95.2.7 4 65010 8 8 47 0 0 00:02:09 8
Все маршрутизаторы установили соседские отношения со всеми
остальными маршрутизаторами AS65010.
Шаг 5
Посмотрите таблицу маршрутизации на маршрутизаторах стенда.
r2#show ip route
.. .. ..
172.16.0.0/28 is subnetted, 4 subnets
C 172.16.1.16 is directly connected, FastEthernet0/1.312
B 172.16.2.16 [200/0] via 10.95.2.3, 00:38:24
C 172.16.1.0 is directly connected, FastEthernet0/1.311
161
B 172.16.2.0 [200/0] via 10.95.2.3, 00:38:24
10.0.0.0/8 is variably subnetted, 29 subnets, 2 masks
O 10.89.2.80/28 [110/61] via 10.93.0.2, 00:35:48, FastEthernet0/0
O 10.89.1.80/28 [110/51] via 10.93.1.18, 00:35:50, Serial0/1/0
O 10.89.2.64/28 [110/61] via 10.93.0.2, 00:35:50, FastEthernet0/0
O 10.89.1.64/28 [110/51] via 10.93.1.18, 00:35:50, Serial0/1/0
O 10.89.2.112/28 [110/61] via 10.93.0.2, 00:35:50, FastEthernet0/0
O 10.89.1.112/28 [110/51] via 10.93.1.18, 00:35:50, Serial0/1/0
O 10.89.2.96/28 [110/61] via 10.93.0.2, 00:35:50, FastEthernet0/0
O 10.89.1.96/28 [110/51] via 10.93.1.18, 00:35:50, Serial0/1/0
O 10.89.2.16/28 [110/61] via 10.93.0.2, 00:35:50, FastEthernet0/0
O 10.89.1.16/28 [110/51] via 10.93.1.2, 00:35:50, Serial0/0/1
O 10.93.2.16/28 [110/60] via 10.93.0.2, 00:35:50, FastEthernet0/0
C 10.93.1.16/28 is directly connected, Serial0/1/0
O 10.95.2.7/32 [110/61] via 10.93.0.2, 00:35:50, FastEthernet0/0
O 10.95.1.4/32 [110/51] via 10.93.1.2, 00:35:50, Serial0/0/1
O 10.89.2.0/28 [110/61] via 10.93.0.2, 00:35:51, FastEthernet0/0
O 10.95.2.6/32 [110/61] via 10.93.0.2, 00:35:51, FastEthernet0/0
O 10.95.1.5/32 [110/51] via 10.93.1.18, 00:35:51, Serial0/1/0
O 10.89.1.0/28 [110/51] via 10.93.1.2, 00:35:51, Serial0/0/1
O 10.95.2.3/32 [110/11] via 10.93.0.2, 00:35:51, FastEthernet0/0
O 10.93.2.0/28 [110/60] via 10.93.0.2, 00:35:51, FastEthernet0/0
C 10.95.1.2/32 is directly connected, Loopback0
C 10.93.1.0/28 is directly connected, Serial0/0/1
C 10.93.0.0/28 is directly connected, FastEthernet0/0
O 10.89.2.48/28 [110/61] via 10.93.0.2, 00:35:54, FastEthernet0/0
O 10.89.1.48/28 [110/51] via 10.93.1.2, 00:35:54, Serial0/0/1
O 10.89.2.32/28 [110/61] via 10.93.0.2, 00:35:54, FastEthernet0/0
O 10.89.1.32/28 [110/51] via 10.93.1.2, 00:35:54, Serial0/0/1
O 10.93.2.32/28 [110/61] via 10.93.0.2, 00:35:54, FastEthernet0/0
O 10.93.1.32/28 [110/51] via 10.93.1.18, 00:35:54, Serial0/1/0
[110/51] via 10.93.1.2, 00:35:54, Serial0/0/1
r4#show ip route
.. .. ..
172.16.0.0/28 is subnetted, 4 subnets
B 172.16.1.16 [200/0] via 10.95.1.2, 00:25:47
B 172.16.2.16 [200/0] via 10.95.2.3, 00:25:47
B 172.16.1.0 [200/0] via 10.95.1.2, 00:25:47
B 172.16.2.0 [200/0] via 10.95.2.3, 00:25:47
10.0.0.0/8 is variably subnetted, 29 subnets, 2 masks
O 10.89.2.80/28 [110/111] via 10.93.1.1, 00:34:48, Serial0/0/0
O 10.89.1.80/28 [110/2] via 10.93.1.34, 00:34:49, FastEthernet0/0
O 10.89.2.64/28 [110/111] via 10.93.1.1, 00:34:49, Serial0/0/0
O 10.89.1.64/28 [110/2] via 10.93.1.34, 00:34:49, FastEthernet0/0
O 10.89.2.112/28 [110/111] via 10.93.1.1, 00:34:50, Serial0/0/0
O 10.89.1.112/28 [110/2] via 10.93.1.34, 00:34:50, FastEthernet0/0
O 10.89.2.96/28 [110/111] via 10.93.1.1, 00:34:50, Serial0/0/0
O 10.89.1.96/28 [110/2] via 10.93.1.34, 00:34:50, FastEthernet0/0
O 10.89.2.16/28 [110/111] via 10.93.1.1, 00:34:50, Serial0/0/0
C 10.89.1.16/28 is directly connected, FastEthernet0/1.812
O 10.93.2.16/28 [110/110] via 10.93.1.1, 00:34:50, Serial0/0/0
O 10.93.1.16/28 [110/51] via 10.93.1.34, 00:34:50, FastEthernet0/0
O 10.95.2.7/32 [110/111] via 10.93.1.1, 00:34:50, Serial0/0/0
C 10.95.1.4/32 is directly connected, Loopback0
O 10.89.2.0/28 [110/111] via 10.93.1.1, 00:34:50, Serial0/0/0
O 10.95.2.6/32 [110/111] via 10.93.1.1, 00:34:50, Serial0/0/0
O 10.95.1.5/32 [110/2] via 10.93.1.34, 00:34:51, FastEthernet0/0
C 10.89.1.0/28 is directly connected, FastEthernet0/1.811
O 10.95.2.3/32 [110/61] via 10.93.1.1, 00:34:51, Serial0/0/0
O 10.93.2.0/28 [110/110] via 10.93.1.1, 00:34:51, Serial0/0/0
O 10.95.1.2/32 [110/51] via 10.93.1.1, 00:34:51, Serial0/0/0
C 10.93.1.0/28 is directly connected, Serial0/0/0
O 10.93.0.0/28 [110/60] via 10.93.1.1, 00:34:51, Serial0/0/0
162
O 10.89.2.48/28 [110/111] via 10.93.1.1, 00:34:52, Serial0/0/0
C 10.89.1.48/28 is directly connected, FastEthernet0/1.814
O 10.89.2.32/28 [110/111] via 10.93.1.1, 00:34:52, Serial0/0/0
C 10.89.1.32/28 is directly connected, FastEthernet0/1.813
O 10.93.2.32/28 [110/111] via 10.93.1.1, 00:34:52, Serial0/0/0
C 10.93.1.32/28 is directly connected, FastEthernet0/0
Почему в таблицах маршрутизации присутствуют маршруты,
полученные по BGP только до внешних сетей маршрутизаторов ISP. Зачем в
AS 65010 запущен протокол OSPF.
Шаг 6
Посмотрите таблицу маршрутизации на маршрутизаторах ISP1 и ISP2.
isp1#show ip route
.. .. ..
172.16.0.0/28 is subnetted, 4 subnets
B 172.16.1.16 [20/0] via 172.16.1.2, 00:59:47
B 172.16.2.16 [20/0] via 172.16.2.2, 00:53:09
C 172.16.1.0 is directly connected, Vlan311
C 172.16.2.0 is directly connected, Vlan321
10.0.0.0/8 is variably subnetted, 29 subnets, 2 masks
B 10.89.2.80/28 [20/0] via 172.16.1.2, 00:20:42
B 10.89.1.80/28 [20/0] via 172.16.1.2, 00:25:22
B 10.89.2.64/28 [20/0] via 172.16.1.2, 00:20:42
B 10.89.1.64/28 [20/0] via 172.16.1.2, 00:25:22
B 10.89.2.112/28 [20/0] via 172.16.1.2, 00:20:42
B 10.89.1.112/28 [20/0] via 172.16.1.2, 00:25:22
B 10.89.2.96/28 [20/0] via 172.16.1.2, 00:20:43
B 10.89.1.96/28 [20/0] via 172.16.1.2, 00:25:23
B 10.89.2.16/28 [20/0] via 172.16.1.2, 00:21:35
B 10.89.1.16/28 [20/0] via 172.16.1.2, 00:27:50
B 10.93.2.16/28 [20/0] via 172.16.2.2, 00:53:10
B 10.93.1.16/28 [20/0] via 172.16.1.2, 00:59:49
B 10.95.2.7/32 [20/0] via 172.16.1.2, 00:20:43
B 10.95.1.4/32 [20/0] via 172.16.1.2, 00:27:50
B 10.95.2.6/32 [20/0] via 172.16.1.2, 00:21:35
B 10.95.1.5/32 [20/0] via 172.16.1.2, 00:25:24
B 10.89.2.0/28 [20/0] via 172.16.1.2, 00:21:36
B 10.89.1.0/28 [20/0] via 172.16.1.2, 00:27:51
B 10.95.2.3/32 [20/0] via 172.16.2.2, 00:53:11
B 10.93.2.0/28 [20/0] via 172.16.2.2, 00:53:11
B 10.95.1.2/32 [20/0] via 172.16.1.2, 00:59:49
B 10.93.1.0/28 [20/0] via 172.16.1.2, 00:59:49
B 10.93.0.0/28 [20/0] via 172.16.1.2, 00:59:49
B 10.89.2.48/28 [20/0] via 172.16.1.2, 00:21:36
B 10.89.1.48/28 [20/0] via 172.16.1.2, 00:27:51
B 10.89.2.32/28 [20/0] via 172.16.1.2, 00:21:36
B 10.89.1.32/28 [20/0] via 172.16.1.2, 00:27:51
B 10.93.2.32/28 [20/0] via 172.16.1.2, 00:21:36
B 10.93.1.32/28 [20/0] via 172.16.1.2, 00:27:51
isp2#show ip route
.. .. ..
172.16.0.0/28 is subnetted, 4 subnets
C 172.16.1.16 is directly connected, Vlan312
C 172.16.2.16 is directly connected, Vlan322
B 172.16.1.0 [20/0] via 172.16.1.18, 00:57:02
B 172.16.2.0 [20/0] via 172.16.2.18, 00:50:23
163
10.0.0.0/8 is variably subnetted, 29 subnets, 2 masks
B 10.89.2.80/28 [20/0] via 172.16.1.18, 00:17:57
B 10.89.1.80/28 [20/0] via 172.16.1.18, 00:22:37
B 10.89.2.64/28 [20/0] via 172.16.1.18, 00:17:57
B 10.89.1.64/28 [20/0] via 172.16.1.18, 00:22:37
B 10.89.2.112/28 [20/0] via 172.16.1.18, 00:17:57
B 10.89.1.112/28 [20/0] via 172.16.1.18, 00:22:37
B 10.89.2.96/28 [20/0] via 172.16.1.18, 00:17:58
B 10.89.1.96/28 [20/0] via 172.16.1.18, 00:22:38
B 10.89.2.16/28 [20/0] via 172.16.1.18, 00:18:50
B 10.89.1.16/28 [20/0] via 172.16.1.18, 00:25:05
B 10.93.2.16/28 [20/0] via 172.16.2.18, 00:50:25
B 10.93.1.16/28 [20/0] via 172.16.1.18, 00:57:03
B 10.95.2.7/32 [20/0] via 172.16.1.18, 00:17:58
B 10.95.1.4/32 [20/0] via 172.16.1.18, 00:25:05
B 10.95.2.6/32 [20/0] via 172.16.1.18, 00:18:50
B 10.95.1.5/32 [20/0] via 172.16.1.18, 00:22:39
B 10.89.2.0/28 [20/0] via 172.16.1.18, 00:18:51
B 10.89.1.0/28 [20/0] via 172.16.1.18, 00:25:06
B 10.95.2.3/32 [20/0] via 172.16.2.18, 00:50:26
B 10.93.2.0/28 [20/0] via 172.16.2.18, 00:50:26
B 10.95.1.2/32 [20/0] via 172.16.1.18, 00:57:04
B 10.93.1.0/28 [20/0] via 172.16.1.18, 00:57:04
B 10.93.0.0/28 [20/0] via 172.16.1.18, 00:57:04
B 10.89.2.48/28 [20/0] via 172.16.1.18, 00:18:51
B 10.89.1.48/28 [20/0] via 172.16.1.18, 00:25:06
B 10.89.2.32/28 [20/0] via 172.16.1.18, 00:18:51
B 10.89.1.32/28 [20/0] via 172.16.1.18, 00:25:06
B 10.93.2.32/28 [20/0] via 172.16.1.18, 00:18:51
B 10.93.1.32/28 [20/0] via 172.16.1.18, 00:25:06
164
Лабораторная работа 17 Настройка суммирования маршрутов
в протоколе BGP
Цель работы:
Изучить суммирование маршрутной информации и ее распространение
в протоколе BGP.
Схема стенда:
Схема соединений маршрутизаторов в лабораторном стенде для
выполнения лабораторной работы № 17 представлена на рисунке 17.
10.89.1.48/28
10.89.1.32/28
10.89.1.16/28
10.89.1.0/28
Fe0/1.814
Fe0/1.811
Fe0/1.812
Fe0/1.813
10.89.2.112/28
R2 R3
R5R4 R6 R7
10.89.2.96/28
10.89.2.80/28
10.89.2.64/28
10.89.2.48/28
10.89.2.32/28
10.89.2.16/28
10.89.2.0/28
Fe0/1.824
Fe0/1.821
Fe0/1.822
Fe0/1.823
Fe0/1.825
Fe0/1.826
Fe0/1.827
Fe0/1.828
10.89.1.112/28
10.89.1.96/28
10.89.1.80/28
10.89.1.64/28
Fe0/1.815
Fe0/1.816
Fe0/1.817
Fe0/1.818
1
0
.
9
3
.
2
.
0
/
2
8
1
0
.
9
3
.
2
.
1
6
/
2
8
1
0
.
9
3
.
1
.
0
/
2
8
1
0
.
9
3
.
1
.
1
6
/
2
8
S0/0/0S0/0/0
S0/0/1 S0/1/0
S0/0/0S0/0/0
S0/1/0S0/0/1
Lo0 10 .95.1.5/32
Lo0 10 .95.1.2/32
Lo0 10 .95.1.4/32
Lo0 10 .95.2.3/32
Lo0 10 .95.2.7/32Lo0 10 .95.2.6/32
Fe0/0 Fe0/0 Fe0/0 Fe0/0
10.93.1.32/28 10.93.2.32/28
Fe0/0 Fe0/0
10.93.0.0/28
AS 65010
OSPF
ISP1 ISP2
Fe0/1.322
Fe0/1.321
Fe0/1.312
Fe0/1.311
Fe1/0/1.311
Fe1/0/1.321
Fe1/0/1.312
Fe1/0/1.322
AS 65001 AS 65002
Рисунок 17 – Структурная схема стенда лабораторной работы №17
165
Список основных команд необходимых для выполнения лабораторной
работы приводится в таблице 17.
Таблица 17 – Основные команды для лабораторной работы № 17
Команда Описание
(config-router)# aggregate-address
address mask [summary-only]
Описание суммарного маршрута для
протокола BGP.
166
Задание 1. Настройка суммирования маршрутов протокола BGP на
маршрутизаторах стенда.
В этом задании необходимо настроить суммирование маршрутов
протокола BGP на маршрутизаторах стенда.
Шаг 1
Посмотрите таблицу маршрутизации на маршрутизаторах ISP1 и ISP2.
isp1#show ip route
.. .. ..
172.16.0.0/28 is subnetted, 4 subnets
B 172.16.1.16 [20/0] via 172.16.1.2, 00:59:47
B 172.16.2.16 [20/0] via 172.16.2.2, 00:53:09
C 172.16.1.0 is directly connected, Vlan311
C 172.16.2.0 is directly connected, Vlan321
10.0.0.0/8 is variably subnetted, 29 subnets, 2 masks
B 10.89.2.80/28 [20/0] via 172.16.1.2, 00:20:42
B 10.89.1.80/28 [20/0] via 172.16.1.2, 00:25:22
B 10.89.2.64/28 [20/0] via 172.16.1.2, 00:20:42
B 10.89.1.64/28 [20/0] via 172.16.1.2, 00:25:22
B 10.89.2.112/28 [20/0] via 172.16.1.2, 00:20:42
B 10.89.1.112/28 [20/0] via 172.16.1.2, 00:25:22
B 10.89.2.96/28 [20/0] via 172.16.1.2, 00:20:43
B 10.89.1.96/28 [20/0] via 172.16.1.2, 00:25:23
B 10.89.2.16/28 [20/0] via 172.16.1.2, 00:21:35
B 10.89.1.16/28 [20/0] via 172.16.1.2, 00:27:50
B 10.93.2.16/28 [20/0] via 172.16.2.2, 00:53:10
B 10.93.1.16/28 [20/0] via 172.16.1.2, 00:59:49
B 10.95.2.7/32 [20/0] via 172.16.1.2, 00:20:43
B 10.95.1.4/32 [20/0] via 172.16.1.2, 00:27:50
B 10.95.2.6/32 [20/0] via 172.16.1.2, 00:21:35
B 10.95.1.5/32 [20/0] via 172.16.1.2, 00:25:24
B 10.89.2.0/28 [20/0] via 172.16.1.2, 00:21:36
B 10.89.1.0/28 [20/0] via 172.16.1.2, 00:27:51
B 10.95.2.3/32 [20/0] via 172.16.2.2, 00:53:11
B 10.93.2.0/28 [20/0] via 172.16.2.2, 00:53:11
B 10.95.1.2/32 [20/0] via 172.16.1.2, 00:59:49
B 10.93.1.0/28 [20/0] via 172.16.1.2, 00:59:49
B 10.93.0.0/28 [20/0] via 172.16.1.2, 00:59:49
B 10.89.2.48/28 [20/0] via 172.16.1.2, 00:21:36
B 10.89.1.48/28 [20/0] via 172.16.1.2, 00:27:51
B 10.89.2.32/28 [20/0] via 172.16.1.2, 00:21:36
B 10.89.1.32/28 [20/0] via 172.16.1.2, 00:27:51
B 10.93.2.32/28 [20/0] via 172.16.1.2, 00:21:36
B 10.93.1.32/28 [20/0] via 172.16.1.2, 00:27:51
isp2#show ip route
.. .. ..
172.16.0.0/28 is subnetted, 4 subnets
C 172.16.1.16 is directly connected, Vlan312
C 172.16.2.16 is directly connected, Vlan322
B 172.16.1.0 [20/0] via 172.16.1.18, 00:57:02
B 172.16.2.0 [20/0] via 172.16.2.18, 00:50:23
10.0.0.0/8 is variably subnetted, 29 subnets, 2 masks
B 10.89.2.80/28 [20/0] via 172.16.1.18, 00:17:57
B 10.89.1.80/28 [20/0] via 172.16.1.18, 00:22:37
B 10.89.2.64/28 [20/0] via 172.16.1.18, 00:17:57
167
B 10.89.1.64/28 [20/0] via 172.16.1.18, 00:22:37
B 10.89.2.112/28 [20/0] via 172.16.1.18, 00:17:57
B 10.89.1.112/28 [20/0] via 172.16.1.18, 00:22:37
B 10.89.2.96/28 [20/0] via 172.16.1.18, 00:17:58
B 10.89.1.96/28 [20/0] via 172.16.1.18, 00:22:38
B 10.89.2.16/28 [20/0] via 172.16.1.18, 00:18:50
B 10.89.1.16/28 [20/0] via 172.16.1.18, 00:25:05
B 10.93.2.16/28 [20/0] via 172.16.2.18, 00:50:25
B 10.93.1.16/28 [20/0] via 172.16.1.18, 00:57:03
B 10.95.2.7/32 [20/0] via 172.16.1.18, 00:17:58
B 10.95.1.4/32 [20/0] via 172.16.1.18, 00:25:05
B 10.95.2.6/32 [20/0] via 172.16.1.18, 00:18:50
B 10.95.1.5/32 [20/0] via 172.16.1.18, 00:22:39
B 10.89.2.0/28 [20/0] via 172.16.1.18, 00:18:51
B 10.89.1.0/28 [20/0] via 172.16.1.18, 00:25:06
B 10.95.2.3/32 [20/0] via 172.16.2.18, 00:50:26
B 10.93.2.0/28 [20/0] via 172.16.2.18, 00:50:26
B 10.95.1.2/32 [20/0] via 172.16.1.18, 00:57:04
B 10.93.1.0/28 [20/0] via 172.16.1.18, 00:57:04
B 10.93.0.0/28 [20/0] via 172.16.1.18, 00:57:04
B 10.89.2.48/28 [20/0] via 172.16.1.18, 00:18:51
B 10.89.1.48/28 [20/0] via 172.16.1.18, 00:25:06
B 10.89.2.32/28 [20/0] via 172.16.1.18, 00:18:51
B 10.89.1.32/28 [20/0] via 172.16.1.18, 00:25:06
B 10.93.2.32/28 [20/0] via 172.16.1.18, 00:18:51
B 10.93.1.32/28 [20/0] via 172.16.1.18, 00:25:06
Как видно в таблицах маршрутизации маршрутизаторов ISP1 и ISP2
присутствуют частные маршруты до сетей стенда.
Шаг 2
Настройте поэтапное суммирование маршрутов подобно тому как это
делалось для дистанционно векторных протоколов маршрутизации.
Шаг 3
Посмотрите таблицу маршрутизации на маршрутизаторах ISP1 и ISP2.
isp1#show ip route
.. .. ..
172.16.0.0/28 is subnetted, 4 subnets
B 172.16.1.16 [20/0] via 172.16.1.2, 00:07:59
B 172.16.2.16 [20/0] via 172.16.2.2, 00:07:29
C 172.16.1.0 is directly connected, Vlan311
C 172.16.2.0 is directly connected, Vlan321
10.0.0.0/8 is variably subnetted, 39 subnets, 5 masks
B 10.89.2.80/28 [20/0] via 172.16.1.2, 00:07:59
B 10.89.1.80/28 [20/0] via 172.16.1.2, 00:04:15
B 10.89.2.64/28 [20/0] via 172.16.1.2, 00:07:59
B 10.89.2.64/26 [20/0] via 172.16.1.2, 00:05:16
B 10.89.1.64/28 [20/0] via 172.16.1.2, 00:04:16
B 10.89.1.64/26 [20/0] via 172.16.1.2, 00:01:45
B 10.89.2.112/28 [20/0] via 172.16.1.2, 00:08:00
B 10.89.1.112/28 [20/0] via 172.16.1.2, 00:04:17
B 10.89.2.96/28 [20/0] via 172.16.1.2, 00:08:01
B 10.89.1.96/28 [20/0] via 172.16.1.2, 00:04:17
B 10.89.2.16/28 [20/0] via 172.16.1.2, 00:08:01
168
B 10.89.1.16/28 [20/0] via 172.16.1.2, 00:08:01
B 10.93.2.16/28 [20/0] via 172.16.1.2, 00:08:01
B 10.93.1.16/28 [20/0] via 172.16.2.2, 00:04:51
B 10.95.2.7/32 [20/0] via 172.16.1.2, 00:08:01
B 10.95.1.4/32 [20/0] via 172.16.1.2, 00:08:01
B 10.95.2.6/32 [20/0] via 172.16.1.2, 00:08:02
B 10.95.1.5/32 [20/0] via 172.16.1.2, 00:04:18
B 10.89.2.0/28 [20/0] via 172.16.1.2, 00:08:02
B 10.89.2.0/26 [20/0] via 172.16.2.2, 00:04:24
B 10.89.2.0/25 [20/0] via 172.16.1.2, 00:03:35
B 10.89.1.0/28 [20/0] via 172.16.1.2, 00:08:02
B 10.89.1.0/26 [20/0] via 172.16.1.2, 00:08:02
B 10.89.1.0/25 [20/0] via 172.16.1.2, 00:01:00
B 10.95.2.3/32 [20/0] via 172.16.2.2, 00:07:32
B 10.95.1.0/29 [20/0] via 172.16.2.2, 00:00:30
B 10.93.2.0/28 [20/0] via 172.16.1.2, 00:08:03
B 10.93.2.0/26 [20/0] via 172.16.1.2, 00:03:05
B 10.95.1.2/32 [20/0] via 172.16.1.2, 00:08:03
B 10.93.1.0/28 [20/0] via 172.16.1.2, 00:08:03
B 10.93.1.0/26 [20/0] via 172.16.2.2, 00:00:31
B 10.95.2.0/29 [20/0] via 172.16.1.2, 00:02:36
B 10.93.0.0/28 [20/0] via 172.16.1.2, 00:08:03
B 10.89.2.48/28 [20/0] via 172.16.1.2, 00:08:03
B 10.89.1.48/28 [20/0] via 172.16.1.2, 00:08:03
B 10.89.2.32/28 [20/0] via 172.16.1.2, 00:08:03
B 10.89.1.32/28 [20/0] via 172.16.1.2, 00:08:03
B 10.93.2.32/28 [20/0] via 172.16.1.2, 00:08:03
B 10.93.1.32/28 [20/0] via 172.16.1.2, 00:08:03
isp2#show ip route
.. .. ..
172.16.0.0/28 is subnetted, 4 subnets
C 172.16.1.16 is directly connected, Vlan312
C 172.16.2.16 is directly connected, Vlan322
B 172.16.1.0 [20/0] via 172.16.1.18, 00:08:40
B 172.16.2.0 [20/0] via 172.16.2.18, 00:08:40
10.0.0.0/8 is variably subnetted, 39 subnets, 5 masks
B 10.89.2.80/28 [20/0] via 172.16.1.18, 00:08:40
B 10.89.1.80/28 [20/0] via 172.16.1.18, 00:05:26
B 10.89.2.64/28 [20/0] via 172.16.1.18, 00:08:40
B 10.89.2.64/26 [20/0] via 172.16.1.18, 00:06:27
B 10.89.1.64/28 [20/0] via 172.16.1.18, 00:05:27
B 10.89.1.64/26 [20/0] via 172.16.1.18, 00:02:56
B 10.89.2.112/28 [20/0] via 172.16.1.18, 00:08:41
B 10.89.1.112/28 [20/0] via 172.16.1.18, 00:05:27
B 10.89.2.96/28 [20/0] via 172.16.1.18, 00:08:41
B 10.89.1.96/28 [20/0] via 172.16.1.18, 00:05:27
B 10.89.2.16/28 [20/0] via 172.16.1.18, 00:08:41
B 10.89.1.16/28 [20/0] via 172.16.1.18, 00:08:41
B 10.93.2.16/28 [20/0] via 172.16.1.18, 00:08:41
B 10.93.1.16/28 [20/0] via 172.16.1.18, 00:05:58
B 10.95.2.7/32 [20/0] via 172.16.1.18, 00:08:41
B 10.95.1.4/32 [20/0] via 172.16.1.18, 00:08:41
B 10.95.2.6/32 [20/0] via 172.16.1.18, 00:08:42
B 10.95.1.5/32 [20/0] via 172.16.1.18, 00:05:28
B 10.89.2.0/28 [20/0] via 172.16.1.18, 00:08:42
B 10.89.2.0/26 [20/0] via 172.16.1.18, 00:05:28
B 10.89.2.0/25 [20/0] via 172.16.1.18, 00:04:45
B 10.89.1.0/28 [20/0] via 172.16.1.18, 00:08:42
B 10.89.1.0/26 [20/0] via 172.16.1.18, 00:08:42
B 10.89.1.0/25 [20/0] via 172.16.1.18, 00:02:10
B 10.95.2.3/32 [20/0] via 172.16.2.18, 00:08:42
B 10.95.1.0/29 [20/0] via 172.16.2.18, 00:01:40
B 10.93.2.0/28 [20/0] via 172.16.1.18, 00:08:42
169
B 10.93.2.0/26 [20/0] via 172.16.2.18, 00:04:16
B 10.95.1.2/32 [20/0] via 172.16.1.18, 00:08:42
B 10.93.1.0/28 [20/0] via 172.16.1.18, 00:08:42
B 10.93.1.0/26 [20/0] via 172.16.2.18, 00:01:41
B 10.95.2.0/29 [20/0] via 172.16.2.18, 00:03:50
B 10.93.0.0/28 [20/0] via 172.16.1.18, 00:08:44
B 10.89.2.48/28 [20/0] via 172.16.1.18, 00:08:44
B 10.89.1.48/28 [20/0] via 172.16.1.18, 00:08:44
B 10.89.2.32/28 [20/0] via 172.16.1.18, 00:08:44
B 10.89.1.32/28 [20/0] via 172.16.1.18, 00:08:44
B 10.93.2.32/28 [20/0] via 172.16.1.18, 00:08:44
B 10.93.1.32/28 [20/0] via 172.16.1.18, 00:08:44
Как видно маршрутов в таблицах маршрутизации маршрутизаторов ISP1
и ISP2 стало только больше. С чем это связано?
Шаг 4
Запретите распространение частных маршрутов совместно с суммарным
маршрутом объявленным маршрутизатором.
Шаг 5
Посмотрите таблицу маршрутизации на маршрутизаторах ISP1 и ISP2.
isp1#show ip route
.. .. ..
172.16.0.0/28 is subnetted, 4 subnets
B 172.16.1.16 [20/0] via 172.16.1.2, 00:05:30
B 172.16.2.16 [20/0] via 172.16.2.2, 00:05:30
10.0.0.0/8 is variably subnetted, 21 subnets, 5 masks
B 10.89.2.64/26 [20/0] via 172.16.1.2, 00:04:41
B 10.89.1.64/26 [20/0] via 172.16.2.2, 00:04:34
B 10.93.2.16/28 [20/0] via 172.16.1.2, 00:04:41
B 10.93.1.16/28 [20/0] via 172.16.2.2, 00:04:34
B 10.95.2.7/32 [20/0] via 172.16.1.2, 00:04:41
B 10.95.1.4/32 [20/0] via 172.16.2.2, 00:04:34
B 10.95.2.6/32 [20/0] via 172.16.1.2, 00:04:41
B 10.95.1.5/32 [20/0] via 172.16.2.2, 00:04:35
B 10.89.2.0/26 [20/0] via 172.16.1.2, 00:04:41
B 10.89.2.0/25 [20/0] via 172.16.2.2, 00:05:30
B 10.89.1.0/26 [20/0] via 172.16.2.2, 00:04:35
B 10.89.1.0/25 [20/0] via 172.16.1.2, 00:05:30
B 10.95.1.0/29 [20/0] via 172.16.1.2, 00:05:30
B 10.93.2.0/28 [20/0] via 172.16.1.2, 00:04:41
B 10.93.2.0/26 [20/0] via 172.16.2.2, 00:05:30
B 10.93.1.0/28 [20/0] via 172.16.2.2, 00:04:36
B 10.93.1.0/26 [20/0] via 172.16.1.2, 00:05:31
B 10.95.2.0/29 [20/0] via 172.16.2.2, 00:05:31
B 10.93.0.0/28 [20/0] via 172.16.1.2, 00:05:31
B 10.93.2.32/28 [20/0] via 172.16.1.2, 00:04:43
B 10.93.1.32/28 [20/0] via 172.16.2.2, 00:04:36
isp2#show ip route
.. .. ..
172.16.0.0/28 is subnetted, 4 subnets
C 172.16.1.16 is directly connected, Vlan312
C 172.16.2.16 is directly connected, Vlan322
170