Connect 2 switch cat6

[theaskyme]

I m trying to connect 2 catalyst switches as trunk using cat6  crossover cable ( around 30m )

The ports are enabled , the cable is tested and both ports set to trunk :

Catalyst 3650G  & Catalyst 2960

The problem is that , there is no lighting when connected. and both ports stay down.

Do you guys have any troubelshooting / solution for this ?

Thank you for your support.

[cadet alain]

Hi,

Did you try other ports? Did you try other cable? what is output of sh interface?

Are you just linking 2 ports with a single cable? Can you do a sh run interface

Regards.

Alain.

[theaskyme]

- I tried 2 cables ( both cat6 , different companies )  and both same result

- I m linking the 2 ports to be used as trunk

- sh run interface :

interface GigabitEthernet0/23

description Connected to roof cat6

switchport trunk encapsulation dot1q

switchport mode trunk
end

interface GigabitEthernet0/1

description Connected to Core Switch

switchport mode trunk

end

- the following is the sh interface for both switches :

GigabitEthernet0/1 is down, line protocol is down (notconnect)

  Hardware is Gigabit Ethernet, address is

  Description: Connected to Core Switch

  MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec,

     reliability 255/255, txload 1/255, rxload 1/255

  Encapsulation ARPA, loopback not set

  Keepalive not set

  Auto-duplex, Auto-speed, link type is auto, media type is Not Present

  input flow-control is off, output flow-control is unsupported

  ARP type: ARPA, ARP Timeout 04:00:00

  Last input 3d02h, output 3d02h, output hang never

  Last clearing of "show interface" counters 1w6d

  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0

  Queueing strategy: fifo

  Output queue: 0/40 (size/max)

  5 minute input rate 0 bits/sec, 0 packets/sec

  5 minute output rate 0 bits/sec, 0 packets/sec

     34740282 packets input, 28095001437 bytes, 0 no buffer

     Received 1227712 broadcasts (0 multicasts)

     0 runts, 0 giants, 0 throttles

     149 input errors, 128 CRC, 0 frame, 0 overrun, 0 ignored

     0 watchdog, 1132553 multicast, 0 pause input

     0 input packets with dribble condition detected

     25094584 packets output, 3462704888 bytes, 0 underruns

     0 output errors, 0 collisions, 4 interface resets

     0 babbles, 0 late collision, 0 deferred

     0 lost carrier, 0 no carrier, 0 PAUSE output

     0 output buffer failures, 0 output buffers swapped out

GigabitEthernet0/23 is down, line protocol is down (notconnect)

  Hardware is Gigabit Ethernet, address is

  Description: Connected to roof cat6

  MTU 1500 bytes, BW 10000 Kbit, DLY 1000 usec,

     reliability 255/255, txload 1/255, rxload 1/255

  Encapsulation ARPA, loopback not set

  Keepalive set (10 sec)

  Auto-duplex, Auto-speed, media type is 10/100/1000BaseTX

  input flow-control is off, output flow-control is unsupported

  ARP type: ARPA, ARP Timeout 04:00:00

  Last input 3d20h, output 3d20h, output hang never

  Last clearing of "show interface" counters 1w6d

  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0

  Queueing strategy: fifo

  Output queue: 0/40 (size/max)

  5 minute input rate 0 bits/sec, 0 packets/sec

  5 minute output rate 0 bits/sec, 0 packets/sec

     5 packets input, 969 bytes, 0 no buffer

     Received 5 broadcasts (0 multicasts)

     0 runts, 0 giants, 0 throttles

     1 input errors, 1 CRC, 0 frame, 0 overrun, 0 ignored

     0 watchdog, 5 multicast, 0 pause input

     0 input packets with dribble condition detected

     7 packets output, 448 bytes, 0 underruns

     0 output errors, 0 collisions, 12 interface resets

     0 babbles, 0 late collision, 0 deferred

     0 lost carrier, 0 no carrier, 0 PAUSE output

     0 output buffer failures, 0 output buffers swapped out

Thank you for your help

[cadet alain]

Hi,

GigabitEthernet0/23 is down, line protocol is down (notconnect)
  Hardware is Gigabit Ethernet, address is 
  Description: Connected to roof cat6
  MTU 1500 bytes, BW 10000 Kbit, DLY 1000 usec, 

The Delay and Bandwidth values are not good, these are the ones for an ethernet port

GigabitEthernet0/1 is down, line protocol is down (notconnect)
  Hardware is Gigabit Ethernet, address is
  Description: Connected to Core Switch
  MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec, 
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation ARPA, loopback not set
  Keepalive not set
  Auto-duplex, Auto-speed, link type is auto, media type is Not Present

That's not cool  either.

Could you try on 2 other ports.

Regards.

Alain.

[theaskyme]

Hey Alain,

It is the same on all ports.

is there anyway to edit ? or reconfigure ,

i tried to set both ports to default using command : default interface

and then reconfigure to trunk.

but with the same result.

the port is not getting up.

Thanks again for your help.

[cadet alain]

Hi,

Can you plug a PC in these ports and get connectivity?

Can you try with a cat5 cable.

Regards.

Alain

[theaskyme]

Hey Alain,

- Cat5 cable works

- I can plug 2 laptops and get 1gb connectivity with ping

- also i just tried to connect f0/48 to g0/23 and it works using the cat6 cable , but when i connect g0/1 to g0/23 no lights, port dont get up

Thank you for your help

[cadet alain]

ok,

So now we know the cable is good indeed, the port is functional but there is something  going between these 2 ports when using this cat6 cable.

Can you statically define the duplex and speed setting to full -1 Gig on two interface and see it it is working then.

Regards.

Alain.

[theaskyme]

I tried to set it from 1 side on the 3650G ( tried the duplex and half duplex and changing speed to 10 & 100 & 1000 with no successs ) , because on the 2960 48ports switch with 2 giga ports , i cant set speed or duplex.

Best Regards,

[cadet alain]

hi,

ok, the G0/1 is a dual-purpose uplink port

Can you try this : under Gig0/1 enter media-type rj45

Try againg and tell us.

Regards.

Alain.

[theaskyme]

Thank you alain,

Sorry for the late reply,

I will try this on monday

and will reply with the results.

[theaskyme]

Hello Alain,

I tried to set media-type rj45 but still i got no lights

Thank you alot for your suggestions.

[Leo Laohoo]

If you console into the 3560G, run a TDR to determine where the problem is.  Here's how you do it:

1.  Command:  test cable tdr int ;

2.  Wait for about 5 - 7 seconds; and

3.  Command:  sh cable tdr int

Please post the output of the command. 

[theaskyme]

Thank you  leolaohoo, for you reply,

i will try your suggestions on monday.

[Leo Laohoo]

Any luck?