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Trunk Ports - 2960

Sev
Level 1
Level 1

I am having a difficult time attempting to figure out why my trunk ports are not working on the Gig ports.  I can get a trunk port setup on ports 1-24 but when i attempt to create the trunks on the Gig ports I get no connectivity.  I see it is related to the allowed Vlans but I can't get the allowed vlan command to work.

I have attempted to restore my configuration to 2 different switches but it is obvious I am missing something but I do not see what it is.  I have issued the no shutdown command on both gig ports as well to no avail.

 

 

 

interface GigabitEthernet0/1
 description *** Trunk to 310SW100 2960 ***
 switchport mode trunk
 switchport nonegotiate
 ip dhcp snooping trust




150SW103#sh vlan

VLAN Name                             Status    Ports
---- -------------------------------- --------- -------------------------------
1    default                          active    Fa0/1, Fa0/2, Fa0/3, Fa0/4
                                                Fa0/5, Fa0/6, Fa0/7, Fa0/8
                                                Fa0/9, Fa0/10, Fa0/11, Fa0/12
                                                Fa0/13, Fa0/14, Fa0/15, Fa0/16
                                                Fa0/17, Fa0/18, Fa0/19, Fa0/20
                                                Fa0/21, Fa0/22, Fa0/23, Fa0/24
                                                Gi0/1, Gi0/2
2    VoIP                             active    Fa0/1, Fa0/2, Fa0/3, Fa0/4
                                                Fa0/5, Fa0/6, Fa0/7, Fa0/8
                                                Fa0/9, Fa0/10, Fa0/11, Fa0/12
                                                Fa0/13, Fa0/14, Fa0/15, Fa0/16
                                                Fa0/17, Fa0/18, Fa0/19, Fa0/20
                                                Fa0/21, Fa0/22, Fa0/23, Fa0/24
10   100-AVAD                         active
115  100.Showroom.LAN                 active
1002 fddi-default                     act/unsup
1003 token-ring-default               act/unsup
1004 fddinet-default                  act/unsup
1005 trnet-default                    act/unsup

VLAN Type  SAID       MTU   Parent RingNo BridgeNo Stp  BrdgMode Trans1 Trans2
---- ----- ---------- ----- ------ ------ -------- ---- -------- ------ ------

VLAN Type  SAID       MTU   Parent RingNo BridgeNo Stp  BrdgMode Trans1 Trans2
---- ----- ---------- ----- ------ ------ -------- ---- -------- ------ ------
1    enet  100001     1500  -      -      -        -    -        0      0
2    enet  100002     1500  -      -      -        -    -        0      0
10   enet  100010     1500  -      -      -        -    -        0      0
115  enet  100115     1500  -      -      -        -    -        0      0
1002 fddi  101002     1500  -      -      -        -    -        0      0
1003 tr    101003     1500  -      -      -        -    srb      0      0
1004 fdnet 101004     1500  -      -      -        ieee -        0      0
1005 trnet 101005     1500  -      -      -        ibm  -        0      0

Remote SPAN VLANs
------------------------------------------------------------------------------


Primary Secondary Type              Ports
------- --------- ----------------- ------------------------------------------




150SW103#sh int g0/1 trunk

Port        Mode             Encapsulation  Status        Native vlan
Gi0/1       on               802.1q         other         1

Port        Vlans allowed on trunk
Gi0/1       none

Port        Vlans allowed and active in management domain
Gi0/1       none

Port        Vlans in spanning tree forwarding state and not pruned
Gi0/1       none
150SW103#sh int g0/2 trunk

Port        Mode             Encapsulation  Status        Native vlan
Gi0/2       on               802.1q         other         1

Port        Vlans allowed on trunk
Gi0/2       none

Port        Vlans allowed and active in management domain
Gi0/2       none

Port        Vlans in spanning tree forwarding state and not pruned
Gi0/2       none





150SW103#sh int g0/1
GigabitEthernet0/1 is down, line protocol is down (notconnect)
  Hardware is Gigabit Ethernet, address is 0024.5155.8b99 (bia 0024.5155.8b99)
  Description: *** Trunk to 310SW100 2960 ***
  MTU 1500 bytes, BW 10000 Kbit, DLY 1000 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 never, output never, output hang never
  Last clearing of "show interface" counters never
  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
     0 packets input, 0 bytes, 0 no buffer
     Received 0 broadcasts (0 multicasts)
     0 runts, 0 giants, 0 throttles
     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
     0 watchdog, 0 multicast, 0 pause input
     0 input packets with dribble condition detected
     0 packets output, 0 bytes, 0 underruns
     0 output errors, 0 collisions, 0 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

 

2 Accepted Solutions

Accepted Solutions

Hello.

 

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

 

--> that could be a physical problem as well. Are you using a crossover cable ?

View solution in original post

Good eye Georg

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

or the cable is bad




>> Marcar como útil o contestado, si la respuesta resolvió la duda, esto ayuda a futuras consultas de otros miembros de la comunidad. <<

View solution in original post

11 Replies 11

Julio E. Moisa
VIP Alumni
VIP Alumni

Hi

That is weird, try to filter the vlans

interface g0/1

switchport trunk allow vlan 2,3,4...

shutdown

no shutdown. 

 




>> Marcar como útil o contestado, si la respuesta resolvió la duda, esto ayuda a futuras consultas de otros miembros de la comunidad. <<

150SW103#config t
Enter configuration commands, one per line. End with CNTL/Z.
150SW103(config)#int g0/1
150SW103(config-if)#switchport trunk allow Vlan 2,3,4,5
150SW103(config-if)#end
150SW103#
000058: *Feb 28 20:51:35: %SYS-5-CONFIG_I: Configured from console by * on consolesh int g0/1 trunk

Port Mode Encapsulation Status Native vlan
Gi0/1 on 802.1q other 1

Port Vlans allowed on trunk
Gi0/1 none

Port Vlans allowed and active in management domain
Gi0/1 none

Port Vlans in spanning tree forwarding state and not pruned
Gi0/1 none


interface GigabitEthernet0/1
description *** Trunk to 310SW100 2960 ***
switchport trunk allowed vlan 2-5
switchport mode trunk
switchport nonegotiate
ip dhcp snooping trust

Hi

Thank you, Is the spanning tree enabled?

example:

spanning-tree vlan 2 priority 4096

 

Caution if it is a switch in operations. 




>> Marcar como útil o contestado, si la respuesta resolvió la duda, esto ayuda a futuras consultas de otros miembros de la comunidad. <<

spanning-tree mode pvst
spanning-tree etherchannel guard misconfig
spanning-tree extend system-id
spanning-tree vlan 1-2 priority 24576

 

 

 

Hi

It looks good, thank you, please verify the comment from Georg, the interface look down for any reason, bad cable or type of cable as Georg mentioned.




>> Marcar como útil o contestado, si la respuesta resolvió la duda, esto ayuda a futuras consultas de otros miembros de la comunidad. <<

Hello.

 

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

 

--> that could be a physical problem as well. Are you using a crossover cable ?

Good eye Georg

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

or the cable is bad




>> Marcar como útil o contestado, si la respuesta resolvió la duda, esto ayuda a futuras consultas de otros miembros de la comunidad. <<

No crossover cable.  If i use an FE port as a trunk all works using the same setup including cable.

 

 

Hi 

Are you using SFP? on some switches you must specify the media type.

Try with:

 

interface g0/0

media-type RJ45




>> Marcar como útil o contestado, si la respuesta resolvió la duda, esto ayuda a futuras consultas de otros miembros de la comunidad. <<

Ok I swapped the standard Cat6 cable which does work on the FE port but did not work on the Gig port. This worked the Gig port is now live.

Great!

:-)




>> Marcar como útil o contestado, si la respuesta resolvió la duda, esto ayuda a futuras consultas de otros miembros de la comunidad. <<