Many thanks all for your assistance
I got console access to the Dell switch during the cutover to the Aruba
The Dell switch is running rstp – the uplink port to the Aruba transitioned to STP state Discarding when the switches were connected
During the next maintenance window we have permission to change the STP mode
Original Message:
Sent: 10/11/2024 5:11:00 AM
From: parnassus
Subject: RE: Dell to Aruba 6200 interoperability
Hello, please provide the output of the command show interfaces switchport <interface-id> executed on the DELL N2024 switch (where <interface-id> is the interface used as downlink to the CISCO switch).
We assume that the above <interface-id> - used as downlink on the DELL switch to the CISCO switch - is characterized by - at least - these parameters:
switchport mode trunk
switchport trunk allowed vlan add x,y,z (where example x,y,z VLAN IDs, if any, are the exact VLAN IDs you're additionally allowing as carrying tagged frames on the downlink to the CISCO switch)
switchport trunk native vlan-id 1 (this is the untagged VLAN ID - also called the Native Port VLAN ID - for the port you're making to operate in Trunk Mode, untagged packets received by this interface are switched in the Native VLAN and transmitted packets in this VLAN are sent untagged by the interface)
Could you confirm that?
The above example would indeed provide a result similar to this one:
VLAN Membership Mode: Trunk Mode
Access Mode VLAN: 1 (default)
General Mode PVID: 1 (default)
General Mode Ingress Filtering: Enabled
General Mode Acceptable Frame Type: Admit All
General Mode Dynamically Added VLANs:
General Mode Untagged VLANs: 1
General Mode Tagged VLANs: x,y,z
General Mode Forbidden VLANs:
Trunking Mode Native VLAN: 1 (default)
Trunking Mode Native VLAN Tagging: Disabled
Trunking Mode VLANs Enabled: All
Private VLAN Host Association: none
Private VLAN Mapping:
Private VLAN Operational Bindings:
Default Priority: 0
Protected: Disabled
Consequently the Aruba CX 6200 side the interface (operating in Trunk Mode too) would be confiugured as was previously told you (maybe vlan trunk allowed all could be changed to reflect the x,y,z instead of all, becoming vlan trunk allowed 1,x,y,z to be 100% sure you are allowing 1 untagged and x,y,z tagged).
Original Message:
Sent: Oct 10, 2024 10:33 AM
From: Aruba@20
Subject: Dell to Aruba 6200 interoperability
thank you
I tried this configuration and the interface on the Aruba did not learn the mac addresses .
Most of the mac addresses of interest on the Dell2024 switch are on VLAN 1
Q could there be an issue with the way Dell /HP process the untagged VLAN ?
details on the Dell switch
Original Message:
Sent: 10/10/2024 4:37:00 AM
From: ariyap
Subject: RE: Dell to Aruba 6200 interoperability
then the config on the CX switch should also be
int 1/1/1
no shutdown
no routing
vlan trunk native 1
vlan trunk allowed all
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If my post was useful accept solution and/or give kudos.
Any opinions expressed here are solely my own and not necessarily that of HPE or Aruba.
Original Message:
Sent: Oct 10, 2024 03:59 AM
From: Aruba@20
Subject: Dell to Aruba 6200 interoperability
hello
Dell side
int x
switchport mode trunk
Cisco side
switchport mode trunk
Aruba
Version ArubaOS-CX ML.10.10.1100
vlan trunk allowed 1, 100
vlan trunk native 1
Original Message:
Sent: 10/9/2024 7:03:00 PM
From: parnassus
Subject: RE: Dell to Aruba 6200 interoperability
Hello! could you show us sanitized configurations of both ends with respect to involved physical (and logical, if any) interfaces? that way, helping you will be easier.
Original Message:
Sent: 10/9/2024 5:18:00 PM
From: Aruba@20
Subject: Dell to Aruba 6200 interoperability
hello
we have a Dell switch connected to a Cisco switch with basic 802.1q trunk configuration on both vendor switches
all VLAN allowed ,
we tried to replace the Cisco switch with the Aruba and found the Aruba would not learn mac addresses from the Dell
any ideas how I can get around this issue ?
I tried changing the native VLAN from 1 but that did not solve this problem