SF220: Trunk between two switches

[AlKor]

SG350 connected by fiber to SW3 port Gi1

SW3 port Gi2 connected by cooper to SW2 port Gi2 in trunk mode

In SW2 Port 18 connected PC.

PC cannot obtain DHCP, cannot ping any host, paket statistics show 0 packet recieved.

When i telnet to SW2 then can ping SW3 an all equipment connected to SW3, but not PC at port 18

Catalyst settings very simple for this case:

interface FastEthernet1/0/48
 switchport trunk native vlan 1
 switchport mode trunk
 spanning-tree portfast

I set SW3 Gi2:

interface gi2
 switchport trunk allowed vlan add 10,20,30,40,50,60,70,80,90,100,168
 description "TO_QC_NOPOE"
 gvrp enable

SW2 Gi2:

interface gi2
 switchport trunk allowed vlan add 10,20,30,40,50,60,70,80,90,100,168
 description "TO_QC_POE"
 gvrp enable

SW2 port Fa18:

interface fa18
 switchport mode access
 switchport access vlan 10
 spanning-tree portfast

If connect SW2 direct to SG350 all work ok.

Whats wrong with my trunk settings?

Configs attached

[Edwin Portillo · Accepted solution]

Hi @AlKor

After reviewing your configuration, what I can find is that the interface of SW3 to SG350 port Gi1 has not been trunked. Have the proof that and tell me what happens.

I will be very aware of you.

[AlKor · Accepted solution]

Yep, you was right!

Just add to SW3 Gi1-> SG350 interface :

switchport trunk allowed vlan add 10,20,30,40,50,60,70,80,90,100,168

And all is work.

This small bussines switches and routers make me crazy. After catalyst series hard to config them