Connection failure between Nexus 7700 and Catalyst 3560

[telecomunicaciones2]

Greetings Cisco community.

I am writing to you on this occasion to request assistance in the following case:

I have been trying to connect a Nexus 7700 (NOX-OS version n7700-s2-dk9.8.4.2.bin) with a Catalyst 3750E switch (IOS 12.2(35r)SE1) and a Catalyst 3560 (IOS 12.2(44)SE5) .
Both backbone connections are fiber optic with 1Gb Gbic.

The problem is that when connecting the ports at the Nexus end they are active and connected but at the Catalyst end the ports are not seen connected.

I already checked the Nexus ports against other computers and they work fine, I also checked the Catalyst ports against other computers and they still connect and work fine.

Is it possible that I am missing some specific configuration in these computers to be able to connect them with each other with a trunk connection?

[Leonardo Pena Davila]

Hola  telecomunicaciones2 

I am not sure of clearly understand the problem.  

   Nexus ----3560

     | 

     |--------3750 

The problem is that when connecting the ports at the Nexus end they are active and connected but at the Catalyst end the ports are not seen connected.

- Could you please clarify on this? 

I already checked the Nexus ports against other computers and they work fine, I also checked the Catalyst ports against other computers and they still connect and work fine.

- Are you concern about access ports or trunk ports connectivity?

Is it possible that I am missing some specific configuration in these computers to be able to connect them with each other with a trunk connection?

- You should attach the interface configuration to better understand the problem and better guide you.

Saludos

Leonardo 

[telecomunicaciones2]

Saludos Leonardo.

Estoy conectando un Nexus 7700 con un switch Catalyst 3560, mediante una conexión troncal con puertos de fibra óptica. 

En el Nexus observo el puerto conectado, pero en el switch Catalyst el puerto no levanta. Ya verifique el funcionamiento del puerto del Catalyst, conectando con otro switch Catalyst por el mismo puerto troncal y funciona sin problema.

Esta es la configuracion de los puertos:

Nexus 7700:

interface Ethernet1/16
switchport
switchport mode trunk
switchport trunk allowed vlan 30
speed 1000
duplex full
no shutdown

Catalyst 3560:

interface GigabitEthernet0/2
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 30
switchport mode trunk
switchport nonegotiate
end

[Javier Acuña]

Saludos  @telecomunicaciones2  Gracias por comunicarte con la comunidad de cisco, podrías compartir por favor los siguientes comandos una vez que tengas conectados los equipos:

Sh inter estado.

Registro de Sh | en  Ethernet1/16

SH entre  Ethernet1/16 SW

atento a tus respuestas para ayudarte a solventar la falla.

Recuerda apoyar con una ayuda y si esto solventa tu problema por favor tilda en solución de problema.

[Leonardo Pena Davila · Accepted solution]

Hola, 

Puedes intentar lo siguiente:

Sea dejar una autonegociación automatica o configurar la speed y el duplex en ambos lados

Nexus 7700:

interface Ethernet1/16
switchport
switchport mode trunk
switchport trunk allowed vlan 30
no shutdown

Catalyst 3560:

interface GigabitEthernet0/2
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 30
switchport mode trunk
switchport nonegotiate
end

o

Nexus 7700:

interface Ethernet1/16
switchport
switchport mode trunk
switchport trunk allowed vlan 30
speed 1000
duplex full
no shutdown

Catalyst 3560:

interface GigabitEthernet0/2
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 30
switchport mode trunk
switchport nonegotiate

speed 1000
duplex full
end

Dejame sabe los resultados,

saludos

Leomardo

[Hilda Arteaga]

Hola @Leonardo Pena Davila muchas gracias por guiar y asistir a @telecomunicaciones2 

[telecomunicaciones2]

Saludos compañeros disculpen por no haber respondido antes, teníamos varios asuntos por resolver.

Finalmente logramos conectar el switch 3560 con el Nexus 7700, los solucionamos cambiando la configuración de la velocidad del puerto en el switch Nexus a 1000Mb.

Les agradezco a todos por su gran aporte.

Saludos