We are really confused if this port is a trunk port or a access port, any help please?

[adamwilkinson776321465]

Hi,

Would anyone be able to help determine if this is an access port or a trunk port please? We are really confused by it having switchport trunk + access on the running config of the interface.. If it is trunk what vlans does it have access to?

Any help greatly received please :)

show running-config interface gi1/0/24
Building configuration...

Current configuration : 131 bytes
!
interface GigabitEthernet1/0/24
switchport trunk encapsulation dot1q
switchport mode access
channel-group 10 mode active
end

Group Port-channel Protocol Ports
------+-------------+-----------+-----------------------------------------------
10 Po10(SU) LACP Gi1/0/24(P) Gi4/0/13(P)

Streets-Cisco-Core#show vlan

VLAN Name Status Ports
---- -------------------------------- --------- -------------------------------
1 default active Gi1/0/1, Gi1/0/2, Gi1/0/3, Gi1/0/4, Gi1/0/7, Gi1/0/8, Gi1/0/9, Gi1/0/10, Gi1/0/11, Gi1/0/12, Gi1/0/13, Gi1/0/14, Gi1/0/17, Gi2/0/1, Gi2/0/2, Gi2/0/4, Gi2/0/6, Gi2/0/7, Gi2/0/8, Gi2/0/10
Gi2/0/11, Gi2/0/12, Gi2/0/13, Gi2/0/14, Gi2/0/17, Gi3/0/1, Gi3/0/2, Gi3/0/3, Gi3/0/4, Gi3/0/5, Gi3/0/7, Gi3/0/8, Gi3/0/9, Gi3/0/10, Gi3/0/11, Gi3/0/12, Gi3/0/13, Gi3/0/14, Gi3/0/15
Gi3/0/16, Gi3/0/17, Gi3/0/24, Gi4/0/1, Gi4/0/2, Gi4/0/5, Gi4/0/7, Gi4/0/8, Gi4/0/9, Gi4/0/10, Gi4/0/11, Gi4/0/12, Gi4/0/14, Gi4/0/15, Gi4/0/16, Gi4/0/18, Gi5/0/2, Gi5/0/3, Gi5/0/4, Gi5/0/5
Gi5/0/7, Gi5/0/8, Gi5/0/9, Gi5/0/10, Gi5/0/11, Gi5/0/14, Gi5/0/16, Gi5/0/18, Gi5/0/20, Gi5/0/22, Gi5/0/23, Po10

[Seb Rupik · Accepted solution]

Hi there,

It is an access port which a member of port-channel 10. To confirm please share the output of

sh int gi1/0/24 switchport

sh run int po10

Being a member link of a port-channel does not mean it is a trunk link (although typically it would be), it has just been bundled for bandwidth aggregation.

cheers,

Seb.

[Seb Rupik]

Actually, just share the output of;
sh int po10 switchport

...the 'Operational mode' will tell you all you need.

[adamwilkinson776321465]

Hi Seb

Thanks for getting back to me this in the output 

sh int po10 switchport
Name: Po10
Switchport: Enabled
Administrative Mode: static access
Operational Mode: static access
Administrative Trunking Encapsulation: dot1q
Operational Trunking Encapsulation: native
Negotiation of Trunking: Off
Access Mode VLAN: 1 (default)
Trunking Native Mode VLAN: 1 (default)
Administrative Native VLAN tagging: enabled
Voice VLAN: none
Administrative private-vlan host-association: none
Administrative private-vlan mapping: none
Administrative private-vlan trunk native VLAN: none
Administrative private-vlan trunk Native VLAN tagging: enabled
Administrative private-vlan trunk encapsulation: dot1q
Administrative private-vlan trunk normal VLANs: none
Administrative private-vlan trunk associations: none
Administrative private-vlan trunk mappings: none
Operational private-vlan: none
Trunking VLANs Enabled: ALL
Pruning VLANs Enabled: 2-1001

Protected: false
Unknown unicast blocked: disabled
Unknown multicast blocked: disabled
Appliance trust: none

[Seb Rupik]

Administrative Mode: static access
Operational Mode: static access
Administrative Trunking Encapsulation: dot1q
Operational Trunking Encapsulation: native
Negotiation of Trunking: Off
Access Mode VLAN: 1 (default)

so it is an mode access switchport on VLAN 1.

cheers,

Seb.

[Jaderson Pessoa]

@adamwilkinson776321465 Hello,

Current configuration : 131 bytes
!
interface GigabitEthernet1/0/24
switchport trunk encapsulation dot1q
switchport mode access
channel-group 10 mode active
end

"When you configure a port in access mode, you can specify which VLAN will carry the traffic for that interface. If you do not configure the VLAN for a port in access mode, or an access port, the interface carries traffic for the default VLAN (VLAN1)"

in this case your port is working in "access mode". But if you want check, run this command: show interface g1/024 switchport... it will confirm it.

#show int gi 1/0/3 sw
Name: Gi1/0/3
Switchport: Enabled
Administrative Mode: dynamic auto
Operational Mode: static access
Administrative Trunking Encapsulation: dot1q
Operational Trunking Encapsulation: native
Negotiation of Trunking: On

Regards,

[Karsten Iwen]

You are reading your config in the wrong way:

The command "switchport mode" sets the mode unconditionally to access. So it will be Access.

All commands starting with "switchport trunk ..." and "switchport access ..." are only valid for the situation that the port is either Trunk or Access. And yes, you can configure commands that have no effect in the actual mode.