[afnog] Ethernet Interface still UP even Cable is not plug into it

[Bruno Agbessitse]

Hi All,

 

I have a Cisco 1751 running IOS c1700-k9o3sy7-mz.124-1.bin.

When we removed the cable from the interface and check the interface it
status still shows up.

I can ping the interface but not the device connected to it.

 

Has someone seen this problem before?

 

Before I shutdown the interface 

Goast#sh ip int b

Interface                  IP-Address              OK? Method Status
Protocol

Ethernet1/0                xxx.xxx.xxx.xxx    YES NVRAM  up
up      

Loopback0                  xxx.xxx.xxx.xxx    YES NVRAM  up
up      

Goast#sh run

 

After the interface was shutdown

Goast#sh ip int e1/0

Ethernet1/0 is administratively down, line protocol is down

  Internet address is xxx.xxx.xxx.xxx/30

  Broadcast address is 255.255.255.255

  Address determined by non-volatile memory

  MTU is 1500 bytes

  Helper address is not set

  Directed broadcast forwarding is disabled

  Outgoing access list is not set

  Inbound  access list is not set

  Proxy ARP is disabled

  Local Proxy ARP is disabled

  Security level is default

  Split horizon is enabled

  ICMP redirects are never sent

  ICMP unreachables are never sent

  ICMP mask replies are never sent

  IP fast switching is enabled

  IP fast switching on the same interface is disabled

  IP Flow switching is enabled

  IP CEF switching is disabled

  IP Flow switching turbo vector

  IP multicast fast switching is enabled

  IP multicast distributed fast switching is disabled

  IP route-cache flags are Fast, Flow cache, No CEF, Full Flow

  Router Discovery is disabled

  IP output packet accounting is disabled

  IP access violation accounting is disabled

  TCP/IP header compression is disabled

  RTP/IP header compression is disabled

  Policy routing is disabled

  Network address translation is disabled

  BGP Policy Mapping is disabled

Goast#

 

 

Bruno.

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