VSS Switchport Issue

Question

Hello Guys,
I am having an issue withVSS ports that I was hopingyou could assist with. I have a pair of 4500x switch, and VSS is completely configured and working properly, however when I uplink both switches using the same port on both to another switch, I cannot pass traffic between them. I have a trunk port setup on both ends, and vlans on both sides, however traffic doesn't cross the trunks. I have tested these same ports as layer 3 routed ports and they work fine. I uplink directly into my laptop with them using a copper GBIC, but when i connect to another cisco switch, traffic does not pass. Could there be a setting im missing to be configrued on the 4500x switches?

Answer 1

Hey Jon,
Thanks for the prompt response, I've attached the requested config output below. If you need anything else, just let me know. I am tryin to communciate over VLAN 19.
Cisco Layer 2 Switch
interface FastEthernet0/1
switchport mode trunk
interface FastEthernet0/2
switchport mode trunk
Switch# show int trunk
Port        Mode             Encapsulation  Status        Native vlan
Fa0/1       on               802.1q         trunking      1
Fa0/2       on               802.1q         trunking      1
Port        Vlans allowed on trunk
Fa0/1       1-4094
Fa0/2       1-4094
Port        Vlans allowed and active in management domain
Fa0/1       1,19-20,200
Fa0/2       1,19-20,200
Port        Vlans in spanning tree forwarding state and not pruned
Fa0/1       1,19-20,200
Fa0/2       1,19-20,200
Cisco 4500x Switch Primary
interface TenGigabitEthernet1/1/3
description UPLINK_TO_SWITCH
switchport mode trunk
interface TenGigabitEthernet2/1/3
description UPLINK_TO_SWITCH
switchport mode trunk
4500x#show int trunk
Port        Mode             Encapsulation  Status        Native vlan
Te1/1/3     on               802.1q         trunking      1
Te2/1/3     on               802.1q         trunking      1
Po10        on               802.1q         trunking      1
Po20        on               802.1q         trunking      1
Port        Vlans allowed on trunk
Te1/1/3     1-4094
Te2/1/3     1-4094
Po10        1-4094
Po20        1-4094
Port        Vlans allowed and active in management domain
Te1/1/3     1,19-20,200
Te2/1/3     1,19-20,200
Po10        1,19-20,200
Po20        1,19-20,200
Port        Vlans in spanning tree forwarding state and not pruned
Te1/1/3     1,19-20,200
Te2/1/3     1,19-20,200
Po10        none
Po20        none