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Есть Cisco 6509.

 

На ней есть Vlan, в который входит сервер (транком), у сервера ip адрес 10.34.0.254. Периодически остальные хосты из этого VLan-а перестают быть видны для сервера, хотя с циски пингуются.

 

Вот с сервера:

 

kk3@valhalla:~$ ping 10.34.0.3

PING 10.34.0.3 (10.34.0.3) 56(84) bytes of data.

From 10.34.0.254 icmp_seq=2 Destination Host Unreachable

From 10.34.0.254 icmp_seq=3 Destination Host Unreachable

From 10.34.0.254 icmp_seq=4 Destination Host Unreachable

 

--- 10.34.0.3 ping statistics ---

6 packets transmitted, 0 received, +3 errors, 100% packet loss, time 5001ms

, pipe 3

Вот с циски:

 

#ping 10.34.0.3

 

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to 10.34.0.3, timeout is 2 seconds:

!!!!!

Success rate is 100 percent (5/5), round-trip min/avg/max = 1/1/4 ms

Вот кусок конфига:

 

interface GigabitEthernet1/1 (Сервер)

description -- Valhalla

switchport

switchport trunk encapsulation dot1q

switchport trunk allowed vlan 400-450

switchport mode trunk

switchport block unicast

no ip address

load-interval 60

no cdp enable

spanning-tree portfast

spanning-tree bpdufilter enable

spanning-tree bpduguard enable

end

 

interface GigabitEthernet3/2 (один из серваков которые пропадают)

description -- Crawler

switchport

switchport access vlan 401

no ip address

no cdp enable

spanning-tree portfast

end

 

interface Vlan401

description -- Crawlers

ip address 10.34.0.1 255.255.255.0

no ip redirects

no ip unreachables

no ip proxy-arp

end

Я даже не представляю в какую сторону копать, на 3560 с подобным конфигом все стабильно работает...

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