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It's failing POST in the loopback test in 2950. Any ideas on how to fix?

hello everybody

I want to active the interfaces on the 2950 but i face to these errors:

conf t

Switch(config)#int ra

Switch(config)#int range fa

Switch(config)#int range fastEthernet 0/1 - 24

Switch(config-if-range)#no shut

Switch(config-if-range)#

00:29:28: Fa0/1 can't be brought up because it failed POST in loopback test

00:29:28: Fa0/2 can't be brought up because it failed POST in loopback test

00:29:28: Fa0/3 can't be brought up because it failed POST in loopback test

00:29:28: Fa0/4 can't be brought up because it failed POST in loopback test

00:29:28: Fa0/5 can't be brought up because it failed POST in loopback test

00:29:28: Fa0/6 can't be brought up because it failed POST in loopback test

00:29:28: Fa0/7 can't be brought up because it failed POST in loopback test

00:29:28: Fa0/8 can't be brought up because it failed POST in loopback test

00:29:28: Fa0/9 can't be brought up because it failed POST in loopback test

00:29:28: Fa0/10 can't be brought up because it failed POST in loopback test

00:29:28: Fa0/11 can't be brought up because it failed POST in loopback test

00:29:28: Fa0/12 can't be brought up because it failed POST in loopback test

00:29:28: Fa0/13 can't be brought up because it failed POST in loopback test

00:29:28: Fa0/14 can't be brought up because it failed POST in loopback test

00:29:28: Fa0/15 can't be brought up because it failed POST in loopback test

00:29:28: Fa0/16 can't be brought up because it failed POST in loopback test

00:29:29: Fa0/17 can't be brought up because it failed POST in loopback test

00:29:29: Fa0/18 can't be brought up because it failed POST in loopback test

00:29:29: Fa0/19 can't be brought up because it failed POST in loopback test

00:29:29: Fa0/20 can't be brought up because it failed POST i n loopback test

00:29:29: Fa0/21 can't be brought up because it failed POST in loopback test

00:29:29: Fa0/22 can't be brought up because it failed POST in loopback test

00:29:29: Fa0/23 can't be brought up because it failed POST in loopback test

00:29:29: Fa0/24 can't be brought up because it failed POST in loopback test

Switch(config-if-range)#

could you tell me why these errors appear, so when i want to set ip in loop back interface ,this error appears:

Switch(config)#int lo

Switch(config)#int loopback ?

<0-2147483647> Loopback interface number

Switch(config)#int loopback 21

^

% Invalid input detected at '^' marker.

help me pls

  • Other Network Infrastructure Subjects
1 REPLY

Re: It's failing POST in the loopback test in 2950. Any ideas on

Hi Ladan,

Its a hardware failure and you have to get the part replaced.

POST is a power on self test and even when you reboot the box it will check the POST (hardware check) so currently its failing the hardware test.

Get it replaced.

Regards,

Ankur

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