Каково объяснение этого случая?
Рассматривая R4 и loopback на R3.1)Кольцо замкнуто:
P 30.30.30.30/32, 1 successors, FD is 156160
via 192.168.30.1 (156160/128256), FastEthernet0/1
2)Размыкаю (FastEthernet0/1 - shutdown):
P 30.30.30.30/32, 1 successors, FD is 161280
via 192.168.40.2 (161280/158720), FastEthernet0/0
3)Замыкаю вновь (но выставляю bandwidth 10000 на обоих интерфейсах):
P 30.30.30.30/32, 1 successors, FD is 386560
via 192.168.30.1 (386560/128256), FastEthernet0/1
via 192.168.40.2 (391680/158720), FastEthernet0/0
Вопрос:
Что мешает роутеру в 1) случае получать такую же EIGRP топологию, как и в 3)?
Т.е. почему нет такого:
P 30.30.30.30/32, 1 successors, FD is 156160
via 192.168.30.1 (156160/128256), FastEthernet0/1
via 192.168.40.2 (161280/158720), FastEthernet0/0
ведь до и после bandwidth остается одинаковым для инт-ов, в 1) - 100000, во 2) - 10000
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bandwidth = 100000 на обоих.
R4#sh ip ei top 30.30.30.30/32
IP-EIGRP (AS 100): Topology entry for 30.30.30.30/32
State is Passive, Query origin flag is 1, 1 Successor(s), FD is 156160
Routing Descriptor Blocks:
192.168.30.1 (FastEthernet0/1), from 192.168.30.1, Send flag is 0x0
Composite metric is (156160/128256), Route is Internal
Vector metric:
Minimum bandwidth is 100000 Kbit
Total delay is 5100 microseconds
Reliability is 255/255
Load is 1/255
Minimum MTU is 1500
Hop count is 1
R4#
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bandwidth = 10000 на обоих.
R4#sh ip ei top 30.30.30.30/32
IP-EIGRP (AS 100): Topology entry for 30.30.30.30/32
State is Passive, Query origin flag is 1, 1 Successor(s), FD is 386560
Routing Descriptor Blocks:
192.168.30.1 (FastEthernet0/1), from 192.168.30.1, Send flag is 0x0
Composite metric is (386560/128256), Route is Internal
Vector metric:
Minimum bandwidth is 10000 Kbit
Total delay is 5100 microseconds
Reliability is 255/255
Load is 1/255
Minimum MTU is 1500
Hop count is 1
192.168.40.2 (FastEthernet0/0), from 192.168.40.2, Send flag is 0x0
Composite metric is (391680/158720), Route is Internal
Vector metric:
Minimum bandwidth is 10000 Kbit
Total delay is 5300 microseconds
Reliability is 255/255
Load is 1/255
Minimum MTU is 1500
Hop count is 3
R4#