Hello,

here some suggestions:

• Ensure all ports (1/1-1/48) are correctly assigned to VLAN 100.
• Ensure all ports are in switchport mode
• Ensure STP is not blocking any ports

Thank you for contacting Dell Technical Support. Your request involves a specific configuration of your Dell S4048 switch. For this type of assistance, you will need to purchase an installation ticket, as we have a dedicated team that handles these advanced configurations.

Please reach out to our customer service for more details on how to proceed with purchasing the installation ticket. We are here to help you resolve the issue as efficiently as possible.

Thank you for your understanding.

@DELL-Marco B​ Thank you for your help here is our running configuration, please can you advise what we set wrong here

DellEMC#show running-config
Current Configuration ...
! Version 9.14(1.14)
! Last configuration change at Thu Mar 27 18:08:11 2025 by sys16z
! Startup-config last updated at Thu Mar 27 18:08:14 2025 by sys16z
!
boot system stack-unit 1 default system://A
!
logging coredump stack-unit  1
logging coredump stack-unit  2
logging coredump stack-unit  3
logging coredump stack-unit  4
logging coredump stack-unit  5
logging coredump stack-unit  6
!
hostname DellEMC
!
protocol lldp
!
redundancy auto-synchronize full
!
enable password level 15 7 b125455cf679b208f962a731cc475faf958e15e9d7158984
!
username ssys16z password 7 26fa1a3099fec9d58bb17c3926023 privilege 15
!
protocol spanning-tree rstp
 no disable
!
allow unsupported-transceiver
!
stack-unit 1 provision S4048-ON
!
interface TenGigabitEthernet 1/1
 no ip address
 mtu 9216
 switchport
 spanning-tree rstp edge-port
 no shutdown
!
interface TenGigabitEthernet 1/2
 no ip address
 mtu 9216
 switchport
 spanning-tree rstp edge-port
 no shutdown
!
interface TenGigabitEthernet 1/3
 no ip address
 mtu 9216
 switchport
 spanning-tree rstp edge-port
 no shutdown
!
interface TenGigabitEthernet 1/4
 no ip address
 mtu 9216
 switchport
 spanning-tree rstp edge-port
 no shutdown
!
interface TenGigabitEthernet 1/5
 no ip address
 mtu 9216
 switchport
 spanning-tree rstp edge-port
 no shutdown
!
interface TenGigabitEthernet 1/6
 no ip address
 mtu 9216
 switchport
 spanning-tree rstp edge-port
 no shutdown
!
interface TenGigabitEthernet 1/7
 no ip address
 mtu 9216
 switchport
 spanning-tree rstp edge-port
 no shutdown
!
interface TenGigabitEthernet 1/8
 no ip address
 mtu 9216
 switchport
 spanning-tree rstp edge-port
 no shutdown
!
interface TenGigabitEthernet 1/9
 no ip address
 mtu 9216
 switchport
 spanning-tree rstp edge-port
 no shutdown
!
interface TenGigabitEthernet 1/10
 no ip address
 mtu 9216
 switchport
 spanning-tree rstp edge-port
 no shutdown
!
interface TenGigabitEthernet 1/11
 no ip address
 mtu 9216
 switchport
 spanning-tree rstp edge-port
 no shutdown
!
interface TenGigabitEthernet 1/12
 no ip address
 mtu 9216
 switchport
 spanning-tree rstp edge-port
 no shutdown
!
interface TenGigabitEthernet 1/13
 no ip address
 mtu 9216
 switchport
 spanning-tree rstp edge-port
 no shutdown
!
interface TenGigabitEthernet 1/14
 no ip address
 mtu 9216
 switchport
 spanning-tree rstp edge-port
 no shutdown
!
interface TenGigabitEthernet 1/15
 no ip address
 mtu 9216
 switchport
 spanning-tree rstp edge-port
 no shutdown
!
interface TenGigabitEthernet 1/16
 no ip address
 mtu 9216
 switchport
 spanning-tree rstp edge-port
 no shutdown
!
interface TenGigabitEthernet 1/17
 no ip address
 mtu 9216
 switchport
 spanning-tree rstp edge-port
 no shutdown
!
interface TenGigabitEthernet 1/18
 no ip address
 mtu 9216
 switchport
 spanning-tree rstp edge-port
 no shutdown
!
interface TenGigabitEthernet 1/19
 no ip address
 mtu 9216
 switchport
 spanning-tree rstp edge-port
 no shutdown
!
interface TenGigabitEthernet 1/20
 no ip address
 mtu 9216
 switchport
 spanning-tree rstp edge-port
 no shutdown
!
interface TenGigabitEthernet 1/21
 no ip address
 mtu 9216
 switchport
 spanning-tree rstp edge-port
 no shutdown
!
interface TenGigabitEthernet 1/22
 no ip address
 mtu 9216
 switchport
 spanning-tree rstp edge-port
 no shutdown
!
interface TenGigabitEthernet 1/23
 no ip address
 mtu 9216
 switchport
 spanning-tree rstp edge-port
 no shutdown
!
interface TenGigabitEthernet 1/24
 no ip address
 mtu 9216
 switchport
 spanning-tree rstp edge-port
 no shutdown
!
interface TenGigabitEthernet 1/25
 no ip address
 mtu 9216
 switchport
 spanning-tree rstp edge-port
 no shutdown
!
interface TenGigabitEthernet 1/26
 no ip address
 mtu 9216
 switchport
 spanning-tree rstp edge-port
 no shutdown
!
interface TenGigabitEthernet 1/27
 no ip address
 mtu 9216
 switchport
 spanning-tree rstp edge-port
 no shutdown
!
interface TenGigabitEthernet 1/28
 no ip address
 mtu 9216
 switchport
 spanning-tree rstp edge-port
 no shutdown
!
interface TenGigabitEthernet 1/29
 no ip address
 mtu 9216
 switchport
 spanning-tree rstp edge-port
 no shutdown
!
interface TenGigabitEthernet 1/30
 no ip address
 mtu 9216
 switchport
 spanning-tree rstp edge-port
 no shutdown
!
interface TenGigabitEthernet 1/31
 no ip address
 mtu 9216
 switchport
 spanning-tree rstp edge-port
 no shutdown
!
interface TenGigabitEthernet 1/32
 no ip address
 mtu 9216
 switchport
 spanning-tree rstp edge-port
 no shutdown
!
interface TenGigabitEthernet 1/33
 no ip address
 mtu 9216
 switchport
 spanning-tree rstp edge-port
 no shutdown
!
interface TenGigabitEthernet 1/34
 no ip address
 mtu 9216
 switchport
 spanning-tree rstp edge-port
 no shutdown
!
interface TenGigabitEthernet 1/35
 no ip address
 mtu 9216
 switchport
 spanning-tree rstp edge-port
 no shutdown
!
interface TenGigabitEthernet 1/36
 no ip address
 mtu 9216
 switchport
 spanning-tree rstp edge-port
 no shutdown
!
interface TenGigabitEthernet 1/37
 no ip address
 mtu 9216
 switchport
 spanning-tree rstp edge-port
 no shutdown
!
interface TenGigabitEthernet 1/38
 no ip address
 mtu 9216
 switchport
 spanning-tree rstp edge-port
 no shutdown
!
interface TenGigabitEthernet 1/39
 no ip address
 mtu 9216
 switchport
 spanning-tree rstp edge-port
 no shutdown
!
interface TenGigabitEthernet 1/40
 no ip address
 mtu 9216
 switchport
 spanning-tree rstp edge-port
 no shutdown
!
interface TenGigabitEthernet 1/41
 no ip address
 mtu 9216
 switchport
 spanning-tree rstp edge-port
 no shutdown
!
interface TenGigabitEthernet 1/42
 no ip address
 mtu 9216
 switchport
 spanning-tree rstp edge-port
 no shutdown
!
interface TenGigabitEthernet 1/43
 no ip address
 mtu 9216
 switchport
 spanning-tree rstp edge-port
 no shutdown
!
interface TenGigabitEthernet 1/44
 no ip address
 mtu 9216
 switchport
 spanning-tree rstp edge-port
 no shutdown
!
interface TenGigabitEthernet 1/45
 no ip address
 mtu 9216
 switchport
 spanning-tree rstp edge-port
 no shutdown
!
interface TenGigabitEthernet 1/46
 no ip address
 mtu 9216
 switchport
 spanning-tree rstp edge-port
 no shutdown
!
interface TenGigabitEthernet 1/47
 no ip address
 mtu 9216
 switchport
 spanning-tree rstp edge-port
 no shutdown
!
interface TenGigabitEthernet 1/48
 no ip address
 mtu 9216
 switchport
 spanning-tree rstp edge-port
 no shutdown
!
interface fortyGigE 1/49
 no ip address
 shutdown
!
interface fortyGigE 1/50
 no ip address
 shutdown
!
interface fortyGigE 1/51
 no ip address
 shutdown
!
interface fortyGigE 1/52
 no ip address
 shutdown
!
interface fortyGigE 1/53
 no ip address
 shutdown
!
interface fortyGigE 1/54
 no ip address
 shutdown
!
interface ManagementEthernet 1/1
 ip address 10.0.1.187/24
 no shutdown
!
interface ManagementEthernet 2/1
 shutdown
!
interface ManagementEthernet 3/1
 shutdown
!
interface ManagementEthernet 4/1
 shutdown
!
interface ManagementEthernet 5/1
 shutdown
!
interface ManagementEthernet 6/1
 shutdown
!
interface Port-channel 123
 no ip address
 switchport
 no shutdown
!
interface Vlan 1
!untagged Port-channel 123
 no shutdown
!
interface Vlan 100
 no ip address
 untagged TenGigabitEthernet 1/1-1/48
 shutdown
!
ip ssh rsa-authentication enable
ip ssh server enable
!
ip igmp snooping enable
!
line console 0
line vty 0
line vty 1
line vty 2
line vty 3
line vty 4
line vty 5
line vty 6
line vty 7
line vty 8
line vty 9
!
reload-type
 boot-type normal-reload
 config-scr-download enable
!
end
DellEMC#

I have vlan 100 on no shutdown

Hi, 

Based on your logs, it seems that the interfaces are not in VLAN 100. Can you run a tagged TenGigabitEthernet 1/1-1/48 instead of untagged.