‎Serial0/x/y:16-30 adminstratively down (show ip interface brief)

[m.kuenzler]

Dear all,

The command "show ip int brief" shows the all the interfaces Serial0/x/y:16 - 0/x/y:30 as "administratively down" except from the very first PRI Interface Serial0/1/0:16 - 0/1/0:30.

router#sh ip int brief
Interface              IP-Address      OK? Method Status                Protocol
…
Serial0/1/1:0          unassigned      YES unset  up                    down
Serial0/1/1:1          unassigned      YES unset  up                    down
Serial0/1/1:2          unassigned      YES unset  up                    down
Serial0/1/1:3          unassigned      YES unset  up                    down
Serial0/1/1:4          unassigned      YES unset  up                    down
Serial0/1/1:5          unassigned      YES unset  down                  down
Serial0/1/1:6          unassigned      YES unset  down                  down
Serial0/1/1:7          unassigned      YES unset  down                  down
Serial0/1/1:8          unassigned      YES unset  down                  down
Serial0/1/1:9          unassigned      YES unset  down                  down
Serial0/1/1:10         unassigned      YES unset  down                  down
Serial0/1/1:11         unassigned      YES unset  down                  down
Serial0/1/1:12         unassigned      YES unset  down                  down
Serial0/1/1:13         unassigned      YES unset  down                  down
Serial0/1/1:14         unassigned      YES unset  down                  down
Serial0/1/1:15         unassigned      YES unset  up                    up
Serial0/1/1:16         unassigned      YES unset  administratively down down
Serial0/1/1:17         unassigned      YES unset  administratively down down
Serial0/1/1:18         unassigned      YES unset  administratively down down
…
router#

The config for the serial interfaces are identical except from the clocking (see attached).

Does someone has a clue, why the interfaces are shown as "adminstratively down" and how to correct it?

Thanks
Martin

[balaji.bandi]

administratively down mean, you need make configuraiton to no shutdown to make it up.

example :

config t

!

interface serial0/1/1:16

no shutdown

do other interface and let us know outcome.

[m.kuenzler]

Sorry, but only the signaling channel is configurable (for PRI E1 this is x/y/z:15). See the output below from my try: 

router#conf t

router(config)#int Serial0/1/1:16

%Cannot access B-channel interfaces

router(config)#exit

router#

[balaji.bandi]

Sorry my bad, i was in impression it was sub interface of serial interface,

Can you post below information :

show run

show controller e1

 show inter s0/1/1:16 (other down interface)

suggested guide for troubleshoot :

https://www.cisco.com/c/en/us/support/docs/wan/t1-e1-t3-e3/14149-chapter15.html

[m.kuenzler]

Thanks for your troubleshoot link. I will have a look. The outputs are attached below.

[m.kuenzler]

Does no one else have the same issue?