cancel
Showing results for 
Search instead for 
Did you mean: 
cancel
5810
Views
0
Helpful
2
Replies

SPANTREE-7-RECV_1Q_NON_TRUNK

uhl_frederick
Level 1
Level 1

Hello,

Have a 48 port 3750 switch that I am connecting to a 24 port 2950. I just want to get the 48 port on net to download firmware. When I do, I get the Spantree error above.

I configure port 48 on the 3750 as this:

interface FastEthernet1/0/48

switchport access vlan 206

switchport trunk encapsulation dot1q

switchport trunk native vlan 206

switchport mode access

and port 13 on the 2950 as this:

interface FastEthernet0/13

switchport access vlan 206

switchport trunk encapsulation dot1q

switchport trunk native vlan 206

switchport mode access

switchport voice vlan 207

switchport priority extend trust

srr-queue bandwidth share 10 10 60 20

srr-queue bandwidth shape 10 0 0 0

mls qos trust device cisco-phone

mls qos trust cos

auto qos voip cisco-phone

spanning-tree portfast

(I turned off the port-fast to in order to see if that was it)

If I did not want to set both ports to switchport mode dynamic desirable (which actually works, but then the ports become trunk ports) How would I do this. I just want to get the 3750 onto Vlan 206, configure an IP address on it, and download firmware.

Thanks for your help,

Gene

2 Accepted Solutions

Accepted Solutions

Giuseppe Larosa
Hall of Fame
Hall of Fame

Hello Gene,

remove

switchport voice vlan 207

on both ports this build an implicit two vlans trunk (the mini trunk)

Hope to help

Giuseppe

View solution in original post

davy.timmermans
Level 4
Level 4

Why not directly connecting your pc to the 3750 switch?

If you just want to allow vlan 206 between the switches and don't want the link to be a trunk:

Following minimal config is required

int fas0/13

switchport access vlan 206

switchport mode access

on 3750

interface FastEthernet1/0/48

switchport access vlan 206

switchport mode access

you don't need these commands for an access port:

switchport trunk encapsulation dot1q

switchport trunk native vlan 206

If you are on the 3750 and wants to access the IOS from another vlan, make sure to have ip default-gateway configured

View solution in original post

2 Replies 2

Giuseppe Larosa
Hall of Fame
Hall of Fame

Hello Gene,

remove

switchport voice vlan 207

on both ports this build an implicit two vlans trunk (the mini trunk)

Hope to help

Giuseppe

davy.timmermans
Level 4
Level 4

Why not directly connecting your pc to the 3750 switch?

If you just want to allow vlan 206 between the switches and don't want the link to be a trunk:

Following minimal config is required

int fas0/13

switchport access vlan 206

switchport mode access

on 3750

interface FastEthernet1/0/48

switchport access vlan 206

switchport mode access

you don't need these commands for an access port:

switchport trunk encapsulation dot1q

switchport trunk native vlan 206

If you are on the 3750 and wants to access the IOS from another vlan, make sure to have ip default-gateway configured

Getting Started

Find answers to your questions by entering keywords or phrases in the Search bar above. New here? Use these resources to familiarize yourself with the community:

Innovations in Cisco Full Stack Observability - A new webinar from Cisco