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Highlighted
Explorer

Switch Stack

Hello Experts,

 

I have newly purchased Cisco Stackable Switches.    but the issue im facing is that, all interfaces in the stack are showing as (shutdown/off).  even i tried to manually turn-on the interfaces using command (no shut),  but still all ints are showing down.

 

any idea, what could be the source of the issue ?

13 REPLIES 13
Highlighted
Hall of Fame Expert

Re: Switch Stack

Hi,

What platform switch you have and what is connected to the ports?

HTH

Highlighted
Explorer

Re: Switch Stack

I have switch model 2960x48-LPS-L,     and i have connected computers into the ports. 

 

Thanks

 

 

 

Highlighted
Hall of Fame Community Legend

Re: Switch Stack

Post the complete output to the command "sh ip interface brief" and "sh post".
Highlighted
Explorer

Re: Switch Stack

SWITCH#show ip interface brief Interface IP-Address OK? Method Status Protocol Vlan1 unassigned YES NVRAM administratively down down Vlan100 10.160.70.4 YES NVRAM up up FastEthernet0 unassigned YES NVRAM administratively down down GigabitEthernet1/0/1 unassigned YES unset down down GigabitEthernet1/0/2 unassigned YES unset down down GigabitEthernet1/0/3 unassigned YES unset down down GigabitEthernet1/0/4 unassigned YES unset down down GigabitEthernet1/0/5 unassigned YES unset down down GigabitEthernet1/0/6 unassigned YES unset down down GigabitEthernet1/0/7 unassigned YES unset down down GigabitEthernet1/0/8 unassigned YES unset down down GigabitEthernet1/0/9 unassigned YES unset down down GigabitEthernet1/0/10 unassigned YES unset down down GigabitEthernet1/0/11 unassigned YES unset down down GigabitEthernet1/0/12 unassigned YES unset down down GigabitEthernet1/0/13 unassigned YES unset down down GigabitEthernet1/0/14 unassigned YES unset down down GigabitEthernet1/0/15 unassigned YES unset down down GigabitEthernet1/0/16 unassigned YES unset down down GigabitEthernet1/0/17 unassigned YES unset down down GigabitEthernet1/0/18 unassigned YES unset down down GigabitEthernet1/0/19 unassigned YES unset down down GigabitEthernet1/0/20 unassigned YES unset down down GigabitEthernet1/0/21 unassigned YES unset down down GigabitEthernet1/0/22 unassigned YES unset down down GigabitEthernet1/0/23 unassigned YES unset down down GigabitEthernet1/0/24 unassigned YES unset down down GigabitEthernet1/0/25 unassigned YES unset down down GigabitEthernet1/0/26 unassigned YES unset down down GigabitEthernet1/0/27 unassigned YES unset down down GigabitEthernet1/0/28 unassigned YES unset down down GigabitEthernet1/0/29 unassigned YES unset down down GigabitEthernet1/0/30 unassigned YES unset down down GigabitEthernet1/0/31 unassigned YES unset down down GigabitEthernet1/0/32 unassigned YES unset down down GigabitEthernet1/0/33 unassigned YES unset down down GigabitEthernet1/0/34 unassigned YES unset down down GigabitEthernet1/0/35 unassigned YES unset down down GigabitEthernet1/0/36 unassigned YES unset down down GigabitEthernet1/0/37 unassigned YES unset down down GigabitEthernet1/0/38 unassigned YES unset down down GigabitEthernet1/0/39 unassigned YES unset down down GigabitEthernet1/0/40 unassigned YES unset down down GigabitEthernet1/0/41 unassigned YES unset down down GigabitEthernet1/0/42 unassigned YES unset down down GigabitEthernet1/0/43 unassigned YES unset down down GigabitEthernet1/0/44 unassigned YES unset down down GigabitEthernet1/0/45 unassigned YES unset down down GigabitEthernet1/0/46 unassigned YES unset down down GigabitEthernet1/0/47 unassigned YES unset down down GigabitEthernet1/0/48 unassigned YES unset up up GigabitEthernet1/0/49 unassigned YES unset down down GigabitEthernet1/0/50 unassigned YES unset down down GigabitEthernet1/0/51 unassigned YES unset down down GigabitEthernet1/0/52 unassigned YES unset down down GigabitEthernet2/0/1 unassigned YES unset up up GigabitEthernet2/0/2 unassigned YES unset down down GigabitEthernet2/0/3 unassigned YES unset down down GigabitEthernet2/0/4 unassigned YES unset down down GigabitEthernet2/0/5 unassigned YES unset down down GigabitEthernet2/0/6 unassigned YES unset down down GigabitEthernet2/0/7 unassigned YES unset down down GigabitEthernet2/0/8 unassigned YES unset down down GigabitEthernet2/0/9 unassigned YES unset down down GigabitEthernet2/0/10 unassigned YES unset down down GigabitEthernet2/0/11 unassigned YES unset down down GigabitEthernet2/0/12 unassigned YES unset down down GigabitEthernet2/0/13 unassigned YES unset down down GigabitEthernet2/0/14 unassigned YES unset down down GigabitEthernet2/0/15 unassigned YES unset down down GigabitEthernet2/0/16 unassigned YES unset down down GigabitEthernet2/0/17 unassigned YES unset down down GigabitEthernet2/0/18 unassigned YES unset down down GigabitEthernet2/0/19 unassigned YES unset down down GigabitEthernet2/0/20 unassigned YES unset down down GigabitEthernet2/0/21 unassigned YES unset down down GigabitEthernet2/0/22 unassigned YES unset down down GigabitEthernet2/0/23 unassigned YES unset down down GigabitEthernet2/0/24 unassigned YES unset down down GigabitEthernet2/0/25 unassigned YES unset down down GigabitEthernet2/0/26 unassigned YES unset down down GigabitEthernet2/0/27 unassigned YES unset down down GigabitEthernet2/0/28 unassigned YES unset down down GigabitEthernet2/0/29 unassigned YES unset down down GigabitEthernet2/0/30 unassigned YES unset down down GigabitEthernet2/0/31 unassigned YES unset down down GigabitEthernet2/0/32 unassigned YES unset down down GigabitEthernet2/0/33 unassigned YES unset down down GigabitEthernet2/0/34 unassigned YES unset down down GigabitEthernet2/0/35 unassigned YES unset down down GigabitEthernet2/0/36 unassigned YES unset down down GigabitEthernet2/0/37 unassigned YES unset down down GigabitEthernet2/0/38 unassigned YES unset down down GigabitEthernet2/0/39 unassigned YES unset down down GigabitEthernet2/0/40 unassigned YES unset down down GigabitEthernet2/0/41 unassigned YES unset down down GigabitEthernet2/0/42 unassigned YES unset down down GigabitEthernet2/0/43 unassigned YES unset down down GigabitEthernet2/0/44 unassigned YES unset down down GigabitEthernet2/0/45 unassigned YES unset down down GigabitEthernet2/0/46 unassigned YES unset down down GigabitEthernet2/0/47 unassigned YES unset down down GigabitEthernet2/0/48 un...

 

----------------------

 

SWITCH#show post Stored system POST messages: Switch 1 --------- POST: MA BIST : Begin POST: MA BIST : End, Status Passed POST: TCAM BIST : Begin POST: TCAM BIST : End, Status Passed POST: Inline Power Controller Tests : Begin POST: Inline Power Controller Tests : End, Status Passed POST: Thermal, Fan Tests : Begin POST: Thermal, Fan Tests : End, Status Passed POST: PortASIC Stack Port Loopback Tests : Begin POST: PortASIC Stack Port Loopback Tests : End, Status Passed POST: PortASIC Port Loopback Tests : Begin POST: PortASIC Port Loopback Tests : End, Status Passed POST: EMAC Loopback Tests : Begin POST: EMAC Loopback Tests : MAC Loopback Passed POST: EMAC Loopback Tests : PHY Loopback Passed POST: EMAC Loopback Tests : End, Status Passed Switch 2 --------- POST: MA BIST : Begin POST: MA BIST : End, Status Passed POST: TCAM BIST : Begin POST: TCAM BIST : End, Status Passed POST: Inline Power Controller Tests : Begin POST: Inline Power Controller Tests : End, Status Passed POST: Thermal, Fan Tests : Begin POST: Thermal, Fan Tests : End, Status Passed POST: PortASIC Stack Port Loopback Tests : Begin POST: PortASIC Stack Port Loopback Tests : End, Status Passed POST: PortASIC Port Loopback Tests : Begin POST: PortASIC Port Loopback Tests : End, Status Passed POST: EMAC Loopback Tests : Begin POST: EMAC Loopback Tests : MAC Loopback Passed POST: EMAC Loopback Tests : PHY Loopback Passed POST: EMAC Loopback Tests : End, Status Passed FR-

 

Highlighted
Hall of Fame Community Legend

Re: Switch Stack

Output shows none of the ports are in shutdown (or administratively down).
Highlighted
Explorer

Re: Switch Stack

But they are all in (unassigned YES unset down down) state. Although i have connected some interfaces with computers but still showing int down ...

 

Any idea please?

Highlighted
Hall of Fame Community Legend

Re: Switch Stack

Pick a port that is currently connected and do the following: 

1.  Command:  test cable tdr interface <PORT>; 

2.  Wait for approximately 5 to 7 seconds; 

3.  Command:  show cable tdr interface <PORT>; 

4.  Post the complete output to #3.

Highlighted
Explorer

Re: Switch Stack

Hello Leo,

 

here is the output of the commands you asked:

 

show cable-diagnostics tdr interface gigabitEthernet 1/0/1
TDR test last run on: July 13 07:35:40

Interface Speed Local pair Pair length Remote pair Pair status
--------- ----- ---------- ------------------ ----------- --------------------
Gi1/0/1 auto Pair A 0 +/- 10 meters N/A Open
Pair B 0 +/- 10 meters N/A Open
Pair C 0 +/- 10 meters N/A Open
Pair D 0 +/- 10 meters N/A Open

Highlighted
Hall of Fame Community Legend

Re: Switch Stack

TDR result shows the switch can detect a path of 10 metres and nothing after that. The fault is at the far end.
Highlighted
Explorer

Re: Switch Stack

Dear Leo,

Then what solution you propose ?  

Highlighted
Hall of Fame Community Legend

Re: Switch Stack


@Imran Ahmad wrote:

Dear Leo,

Then what solution you propose ?  


The cable test shows someone isn't doing his/her job properly. 

A cable is patched to the switch but at the far end NOTHING is connected to the cable.  

Just think about it:  It is claimed that all ports are patched but the switch doesn't show a single port is active.

  • Are the details in the patch sheet correct?  
  • Are the patch port terminated properly? 
  • Seriously, is the patch cable connected to the computer?  Here's a good hint, look at the computer's ethernet port.  Are the LEDs blinking or not.  If they're not, then duh!, the port isn't connected properly.
Highlighted
Hall of Fame Community Legend

Re: Switch Stack

What model is the switch?
Highlighted
Explorer

Re: Switch Stack

2960x-LPS-L

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