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S2500 Host Port - Trunk Allow VLAN All - DAC cable or port settings?

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  • 1.  S2500 Host Port - Trunk Allow VLAN All - DAC cable or port settings?

    Posted Sep 09, 2021 11:31 PM

    Getting back to this project... Once I had vlans created and IPs bound I created profile .. dhcp relay etc..  I was ready to plug hosts in and hit the ground running.

    3 Meter DAC Cable to each "second port" on ESXi 7 host. 


    Profiles I set.  10Gb nics are vSAN traffic only. So access mode VLAN 101 is all that is needed. Can't get any more simple  
    !
    interface-profile switching-profile "access_101"
    access-vlan 101
    native-vlan 101
    trunk allowed vlan 101
    !
    interface-profile switching-profile "default"
    access-vlan 100
    native-vlan 100
    trunk allowed vlan 100
    !
    interface-profile switching-profile "esxi_host"
    switchport-mode trunk
    storm-control-bandwidth 5
    !
    interface-profile enet-link-profile "10Gb_Full"
    speed 10000
    duplex full
    !


    I just expected it to work...  but connection of host to port .. no connection.. Hmm..

    (sw0) (config) #show running-config interface gigabitethernet 0/1/0

    interface-config gigabitethernet "0/1/0" detail
    -----------------------------------------------
    interface-profile mstp-profile default
    point-to-point Disabled
    portfast Disabled trunk Disabled
    bpdufilter default Disabled
    bpdufilter unconditional Disabled
    rootguard Disabled
    loopguard Disabled
    bpduguard Disabled auto-recovery-time 0
    interface-profile pvst-port-profile default
    point-to-point Disabled
    portfast Disabled trunk Disabled
    bpdufilter default Disabled
    bpdufilter unconditional Disabled
    rootguard Disabled
    loopguard Disabled
    bpduguard Disabled auto-recovery-time 0
    interface-profile lldp-profile lldp-factory-initial
    lldp transmit Enabled
    lldp receive Enabled
    lldp tlv-select port-description Enabled
    lldp tlv-select system-name Enabled
    lldp tlv-select system-description Enabled
    lldp tlv-select system-capabilities Enabled
    lldp tlv-select management-address Enabled
    lldp tlv-select port-vlan-id Enabled
    lldp tlv-select vlan-name Enabled
    lldp tlv-select aggregation-status Enabled
    lldp tlv-select mac-phy-config Enabled
    lldp tlv-select max-frame-size Enabled
    lldp tlv-select power-management Enabled
    lldp med-tlv-select network-policy Enabled
    lldp med-tlv-select power-management Enabled
    lldp transmit-interval 30
    lldp transmit-hold 4
    lldp fast-transmit-interval 1
    lldp fast-transmit-counter 4
    proprietary-neighbor-discovery Disabled
    interface-profile poe-profile poe-factory-initial
    enable Enabled
    poe-maxpower 30000
    poe-priority low
    interface-profile enet-link-profile 10Gb_Full
    speed 10000
    duplex full
    autonegotiation Enabled
    flowcontrol off
    interface-profile switching-profile access_101
    switchport-mode access
    access-vlan 101
    native-vlan 101
    storm-control-broadcast Enabled
    storm-control-multicast Disabled
    storm-control-unknown-unicast Enabled
    storm-control-bandwidth 50
    trunk allowed vlan 101
    mtu 9216
    qos trust aruba-device
    description thor-vmnic0
    trusted port
    igmp-snooping mrouter-vlan 0
    mld-snooping mrouter-vlan 0

    (sw0) (config) # show interface gigabitethernet 0/1/0

    GE0/1/0 is administratively Up, Link is Down, Line protocol is Down
    Hardware is Gigabit Ethernet, Interface is thor-vmnic0, Address is 00:0b:86:a8:e1:f2
    Encapsulation ARPA, Loopback not set
    Configured: duplex (Full), Speed (1 Gbps), FC (Off), Autoneg (On)
    Auto negotiation in progress
    Interface index: 129
    MTU 9216 bytes
    Link flaps: 1
    Flags: Access, Trusted
    Link status last changed: 0d 00:00:00 ago
    Last update of counters: 0d 00:00:00 ago
    Last clearing of counters: 0d 00:00:00 ago
    Statistics:
    Received 43 frames, 13269 octets
    0 pps, 0 bps
    0 unicast, 43 multicast, 0 broadcast
    0 runts, 0 giants, 0 throttles
    0 error octets, 0 CRC frames
    Transmitted 26623 frames, 4210045 octets
    0 pps, 0 bps
    108 unicast, 24257 multicast, 2258 broadcast
    0 throttles, 0 errors octets, 0 deferred
    0 collisions, 0 late collisions
    Interface is not PoE capable


    ##########
    I figured it may be aruba compat with passive DAC tranceiever ... 
    (sw0) (gigabitethernet "0/1/0") #show interface gigabitethernet 0/1/0 transceiver detail

    Vendor Name : CCX
    Vendor Serial Number : CCX3C69B9587
    Vendor Part Number : 58-1000027-01
    Aruba Certified : NO
    Cable Type : 1000BASE-CX
    Connector Type : Copper Pigtail
    Wave Length : 1024 nm
    Cable Length : 3m

    But I tested three other cables 

    (sw0) (gigabitethernet "0/1/0") #show interface gigabitethernet 0/1/1 transceiver detail

    Vendor Name : BROCADE
    Vendor Serial Number : CBX113100001756
    Vendor Part Number : 58-1000027-01
    Aruba Certified : NO
    Cable Type : 1000BASE-CX
    Connector Type : Copper Pigtail
    Wave Length : 1024 nm
    Cable Length : 3m


    Figured I would do looping of DAC from port  gi 0/1/0  to gi 0/1/1  ...  Bam... works line comes up.   Take that same cable and go to host.. line won't come up.. test all three nodes and same.. flip to port of host I know works..   still no link...  test with cable from current working host / microtek switch .. still no link.

    So.. Don't think it is DAC, host, .. must be something in my port configuration.  Only thing that jumps out is 1Gb connection and 1500 mtu those port profile set to bump this to 9k and 10Gb Full.

    Here is state of  DAC with working state of looping gi 0/1/2 to gi 0/1/3
    (sw0) (config) #show interface gigabitethernet 0/1/2

    GE0/1/2 is administratively Up, Link is Up, Line protocol is Up
    Hardware is Gigabit Ethernet, Interface is medusa-vnic1, Address is 00:0b:86:a8:e1:f4
    Encapsulation ARPA, Loopback not set
    Configured: duplex (Full), Speed (1 Gbps), FC (Off), Autoneg (On)
    Negotiated: duplex (Full), Speed (1 Gbps)
    Interface index: 131
    MTU 1514 bytes
    Link flaps: 0
    Flags: Access, Trusted
    Link status last changed: 0d 00:01:03 ago
    Last update of counters: 0d 00:00:02 ago
    Last clearing of counters: 1w0d 04:37:43 ago
    Statistics:
    Received 10 frames, 1750 octets
    0 pps, 0 bps
    0 unicast, 10 multicast, 0 broadcast
    0 runts, 0 giants, 0 throttles
    0 error octets, 0 CRC frames
    Transmitted 53 frames, 6302 octets
    0 pps, 326 bps
    0 unicast, 42 multicast, 11 broadcast
    0 throttles, 0 errors octets, 0 deferred
    0 collisions, 0 late collisions
    Interface is not PoE capable

    (sw0) (config) #show interface gigabitethernet 0/1/3

    GE0/1/3 is administratively Up, Link is Up, Line protocol is Up
    Hardware is Gigabit Ethernet, Interface is eir-vmn#, Address is 00:0b:86:a8:e1:f5
    Encapsulation ARPA, Loopback not set
    Configured: duplex (Full), Speed (1 Gbps), FC (Off), Autoneg (On)
    Negotiated: duplex (Full), Speed (1 Gbps)
    Interface index: 132
    MTU 1514 bytes
    Link flaps: 0
    Flags: Access, Trusted
    Link status last changed: 0d 00:01:12 ago
    Last update of counters: 0d 00:00:00 ago
    Last clearing of counters: 1w0d 04:37:49 ago
    Statistics:
    Received 61 frames, 7335 octets
    0 pps, 325 bps
    0 unicast, 49 multicast, 12 broadcast
    0 runts, 0 giants, 0 throttles
    0 error octets, 0 CRC frames
    Transmitted 11 frames, 1977 octets
    0 pps, 0 bps
    0 unicast, 11 multicast, 0 broadcast
    0 throttles, 0 errors octets, 0 deferred
    0 collisions, 0 late collisions
    Interface is not PoE capable

    (sw0) (config) #

    (sw0) (config) #show running-config interface gigabitethernet 0/1/2

    interface-config gigabitethernet "0/1/2" detail
    -----------------------------------------------
    interface-profile mstp-profile default
    point-to-point Disabled
    portfast Disabled trunk Disabled
    bpdufilter default Disabled
    bpdufilter unconditional Disabled
    rootguard Disabled
    loopguard Disabled
    bpduguard Disabled auto-recovery-time 0
    interface-profile pvst-port-profile default
    point-to-point Disabled
    portfast Disabled trunk Disabled
    bpdufilter default Disabled
    bpdufilter unconditional Disabled
    rootguard Disabled
    loopguard Disabled
    bpduguard Disabled auto-recovery-time 0
    interface-profile lldp-profile lldp-factory-initial
    lldp transmit Enabled
    lldp receive Enabled
    lldp tlv-select port-description Enabled
    lldp tlv-select system-name Enabled
    lldp tlv-select system-description Enabled
    lldp tlv-select system-capabilities Enabled
    lldp tlv-select management-address Enabled
    lldp tlv-select port-vlan-id Enabled
    lldp tlv-select vlan-name Enabled
    lldp tlv-select aggregation-status Enabled
    lldp tlv-select mac-phy-config Enabled
    lldp tlv-select max-frame-size Enabled
    lldp tlv-select power-management Enabled
    lldp med-tlv-select network-policy Enabled
    lldp med-tlv-select power-management Enabled
    lldp transmit-interval 30
    lldp transmit-hold 4
    lldp fast-transmit-interval 1
    lldp fast-transmit-counter 4
    proprietary-neighbor-discovery Disabled
    interface-profile poe-profile poe-factory-initial
    enable Enabled
    poe-maxpower 30000
    poe-priority low
    interface-profile enet-link-profile 10Gb_Full
    speed 10000
    duplex full
    autonegotiation Enabled
    flowcontrol off
    interface-profile switching-profile access_101
    switchport-mode access
    access-vlan 101
    native-vlan 101
    storm-control-broadcast Enabled
    storm-control-multicast Disabled
    storm-control-unknown-unicast Enabled
    storm-control-bandwidth 50
    trunk allowed vlan 101
    mtu 1514
    qos trust aruba-device
    description medusa-vnic1
    trusted port
    igmp-snooping mrouter-vlan 0
    mld-snooping mrouter-vlan 0

    Logs not showing much.  Only one that looked odd was about profile 10Gb_Full

    Sep 9 22:19:56 :340001: <WARN> |l2m| changing the instance 101 port GE0/1/2 state from LEARNING to FORWARDING
    Sep 9 22:33:44 :335311: <WARN> |ChassisManager| Configuration parameters under enet profile (10Gb_Full) does not match for interface GE0/1/1, Ignoring the configuration
    Sep 9 22:35:10 :335311: <WARN> |ChassisManager| Configuration parameters under enet profile (10Gb_Full) does not match for interface GE0/1/1, Ignoring the configuration
    **************security************
    Sep 1 20:49:12 :103062: <INFO> |ike| Starting cryptoPOST


    I am sure it is something stupid I am missing.  Thanks for help

    ------------------------------
    penguinpages
    ------------------------------


  • 2.  RE: S2500 Host Port - Trunk Allow VLAN All - DAC cable or port settings?

    MVP GURU
    Posted Sep 10, 2021 03:37 AM
    Hi!

    Let me ask you a thing just to clarify: are you trying to deploy a 10Gbps DAC connectivity between an Aruba S2500 MAS Switch and a Server over 1Gbps SFP physical ports of the MAS or what?

    Given what you wrote it seems you're playing with a (supported) 10G DACs on 1G ports...it doesn't work that way...a port capable of working only at Gigabit Ethernet speed can't work at TenGigabit-Ethernet speed (the vice-versa is possible although sometime Vendors Hardware locks-in, if any, could impose you some restrictions).

    Other question: what's the NIC port's speed server side? 1G (SFP) or 10G (SFP+)?

    Not an expert about Aruba Networking MAS Switch series, I believe that a port that should operate in access mode (untagged member of a particular VLAN ID), from the pure VLAN tagging membership standpoint, should not require the "trunk allowed vlan 101" configuration line which, instead, is typically necessary on ports operating in trunk mode (thus carrying more tagged VLAN IDs). Examples here.

    Edit: just fo reference, the Aruba S2500 MAS Switch series supports these DACs (on SFP+ ports):
    - DAC-SFP-10GE-50CM 50cm 10GbE SFP+ Twinax Connectors Direct Attach Cable (JW100A)
    - DAC-SFP-10GE-1M 1m 10GbE SFP+ Twinax Connectors Direct Attach Cable (JW101A)
    - DAC-SFP-10GE-3M 3m 10GbE SFP+ Twinax Connectors Direct Attach Cable (JW102A)
    - DAC-SFP-10GE-5M 5m 10GbE SFP+ Twinax Connectors Direct Attach Cable (JW103A)
    - DAC-SFP-10GE-7M 7m 10GbE SFP+ Twinax Connectors Direct Attach Cable (JW104A)

    ------------------------------
    Davide Poletto
    ------------------------------

    Original Message


  • 3.  RE: S2500 Host Port - Trunk Allow VLAN All - DAC cable or port settings?

    Posted Sep 10, 2021 08:01 AM
    ".. Aruba S2500 MAS Switch and a Server over 1Gbps SFP physical ports of the MAS or what" 

    All hosts are 10Gb HBAs.   All three servers have one port going to my current     MikroTik CRS305-1G-4S+in

    All three hosts now have second port of that HBA connected to the 10Gb ports of the Aruba     S2500-48P-4x10G   (ports gi 0/1/0-03)

    Only time the ports go line up / protocol up is when I do a loop Ex: (gi 0/1/2 to  gi 0/1/3) 






    ------------------------------
    Jeremey Wise
    ------------------------------

    Original Message


  • 4.  RE: S2500 Host Port - Trunk Allow VLAN All - DAC cable or port settings?

    EMPLOYEE
    Posted Sep 10, 2021 08:01 AM
    Normally on 10G SFP+ ports, you don't set the speed. Can you remove the commands under the 10Gb_Full enet-link-profile? As the log message says it it ignoring the config, it may not solve your issue.

    Also, the config:
    interface-profile switching-profile "access_101"
access-vlan 101
native-vlan 101
trunk allowed vlan 101​

    Does not make sense...  For an access port:

    interface-profile switching-profile "access_101"
access-vlan 101

    Here as well, the other commands are ignored, as the default switch port mode is access.

    I'm lost as well on the DAC and SFP+ ports. For SFP+ it makes sense to have 10G DAC Cables. I heard that there are 1G DAC cables as well, but these appear to be problematic, so better use UTP for those connections.

    Can you show/explain what is connected in each of your ports and each of your devices? And how things are interconnected?
    Please include the server networkcard... does that support SFP+ and 10G?

    I have a S2500 with a 10G DAC cable (think that is an official Aruba DAC) connected to an HP server (SFP+ NIC), and that works like a charm:
    #show interface transceivers

GE0/1/0
-------
Vendor Name                                : Molex Inc.
Vendor Serial Number                       : removed
Vendor Part Number                         : 74752-1051
Aruba Certified                            : YES
Cable Type                                 : 10GBASE-DAC-P
Connector Type                             : Copper Pigtail
Wave Length                                : 0 nm
Cable Length                               : 0.5m​


    ------------------------------
    Herman Robers
    ------------------------
    If you have urgent issues, always contact your Aruba partner, distributor, or Aruba TAC Support. Check https://www.arubanetworks.com/support-services/contact-support/ for how to contact Aruba TAC. Any opinions expressed here are solely my own and not necessarily that of Hewlett Packard Enterprise or Aruba Networks.

    In case your problem is solved, please invest the time to post a follow-up with the information on how you solved it. Others can benefit from that.
    ------------------------------

    Original Message


  • 5.  RE: S2500 Host Port - Trunk Allow VLAN All - DAC cable or port settings?

    Posted Sep 10, 2021 09:15 AM
    Ya... I thought that profile was a bit weird.. but the GUI was enforcing those fields to be set... so I went with it


    Can you show/explain what is connected in each of your ports and each of your devices? And how things are interconnected?
    Please include the server networkcard... does that support SFP+ and 10G?

    Three servers each with dual port 10Gb HBAs: 
    thor & odin servers
    Adapter Intel(R) 82599 10 Gigabit Dual Port Network Connection
    Name vmnic1
    Location PCI 0000:03:00.1
    Driver ixgben

    Medusa - 
    Adapter QLogic Inc. QLogic 57800 10 Gigabit Ethernet Adapter
    Name vmnic0
    Location PCI 0000:03:00.0
    Driver qfle3

    All three are working now with my

    MikroTik CRS305-1G-4S+in   so I know its not cable or host.   I am simply adding the Aruba switch to get better functions and connection redundancy.

    The twinax cables are all 10Gb .

    The host shows status



    Did not figure this would have been an issue.  

    I did go back to CLI to clean out those native vlan and allow trunk weird settings. 

    !
    interface-profile switching-profile "access_101"
    access-vlan 101
    !
    interface-profile switching-profile "default"
    access-vlan 100
    !
    interface-profile switching-profile "esxi_host"
    switchport-mode trunk
    storm-control-bandwidth 5
    !
    interface-profile poe-profile "default"
    !
    interface-profile poe-profile "poe-factory-initial"
    enable
    !
    interface-profile enet-link-profile "10Gb_Full"
    !
    interface-profile enet-link-profile "default"
    !
    interface-profile lldp-profile "default"
    !


    Shut / no shut ports.. no change  
    (sw0) (config) #show interface gigabitethernet 0/1/1

    GE0/1/1 is administratively Up, Link is Down, Line protocol is Down
    Hardware is Gigabit Ethernet, Interface is odin-vmnic1, Address is 00:0b:86:a8:e1:f3
    Encapsulation ARPA, Loopback not set
    Configured: duplex (N/A), Speed (N/A), FC (Off), Autoneg (Off)
    Interface index: 130
    MTU 9216 bytes
    Link flaps: 1
    Flags: Access, Trusted
    Link status last changed: 0d 00:00:00 ago
    Last update of counters: 0d 00:00:00 ago
    Last clearing of counters: 0d 00:00:00 ago
    Statistics:
    Received 26598 frames, 4205268 octets
    0 pps, 0 bps
    108 unicast, 24232 multicast, 2258 broadcast
    0 runts, 0 giants, 0 throttles
    0 error octets, 0 CRC frames
    Transmitted 46 frames, 13895 octets
    0 pps, 0 bps
    1 unicast, 45 multicast, 0 broadcast
    0 throttles, 0 errors octets, 0 deferred
    0 collisions, 0 late collisions
    Interface is not PoE capable

    (sw0) (config) #show running-config interface gigabitethernet 0/1/1

    interface-config gigabitethernet "0/1/1" detail
    -----------------------------------------------
    interface-profile mstp-profile default
    point-to-point Disabled
    portfast Disabled trunk Disabled
    bpdufilter default Disabled
    bpdufilter unconditional Disabled
    rootguard Disabled
    loopguard Disabled
    bpduguard Disabled auto-recovery-time 0
    interface-profile pvst-port-profile default
    point-to-point Disabled
    portfast Disabled trunk Disabled
    bpdufilter default Disabled
    bpdufilter unconditional Disabled
    rootguard Disabled
    loopguard Disabled
    bpduguard Disabled auto-recovery-time 0
    interface-profile lldp-profile lldp-factory-initial
    lldp transmit Enabled
    lldp receive Enabled
    lldp tlv-select port-description Enabled
    lldp tlv-select system-name Enabled
    lldp tlv-select system-description Enabled
    lldp tlv-select system-capabilities Enabled
    lldp tlv-select management-address Enabled
    lldp tlv-select port-vlan-id Enabled
    lldp tlv-select vlan-name Enabled
    lldp tlv-select aggregation-status Enabled
    lldp tlv-select mac-phy-config Enabled
    lldp tlv-select max-frame-size Enabled
    lldp tlv-select power-management Enabled
    lldp med-tlv-select network-policy Enabled
    lldp med-tlv-select power-management Enabled
    lldp transmit-interval 30
    lldp transmit-hold 4
    lldp fast-transmit-interval 1
    lldp fast-transmit-counter 4
    proprietary-neighbor-discovery Disabled
    interface-profile poe-profile poe-factory-initial
    enable Enabled
    poe-maxpower 30000
    poe-priority low
    interface-profile enet-link-profile 10Gb_Full
    speed auto
    duplex auto
    autonegotiation Enabled
    flowcontrol off
    interface-profile switching-profile access_101
    switchport-mode access
    access-vlan 101
    native-vlan 1
    storm-control-broadcast Enabled
    storm-control-multicast Disabled
    storm-control-unknown-unicast Enabled
    storm-control-bandwidth 50
    trunk allowed vlan 1-4094
    mtu 9216
    qos trust aruba-device
    description odin-vmnic1
    trusted port
    igmp-snooping mrouter-vlan 0
    mld-snooping mrouter-vlan 0


    still looks reasonable..  but not much of a baseline to go from.  fun how it put "native vlan 1"  and trun allowed  1-4094  which is not what I would expect.

    GUI shows same

    still no host link




    ------------------------------
    Jeremey Wise
    ------------------------------

    Original Message


  • 6.  RE: S2500 Host Port - Trunk Allow VLAN All - DAC cable or port settings?

    EMPLOYEE
    Posted Sep 13, 2021 04:03 AM
    If you have the CCX 58-1000027-01, and it shows up as 1G as above it may be that the DAC cable is just not supported (and not working). This DAC cable is labeled as FCoE (10Gbps), which is specific for storage, and I don't know if these can be used for plain ethernet. At least it looks the cable is not properly detected.

    The S2500 does not actively block transceivers, but also has not been tested with any DAC cable. If it doesn't work, at this point make sure that you are on the latest version of MAS firmware. If it still doesn't work, you may be in bad luck as MAS is no longer supported and developed. Trying another cable, possibly one that is just Ethernet, not FCoE, may be successful. The Molex DAC in my command output above is what was sold as Aruba, so that may be the best bet if you want to try further.

    ------------------------------
    Herman Robers
    ------------------------
    If you have urgent issues, always contact your Aruba partner, distributor, or Aruba TAC Support. Check https://www.arubanetworks.com/support-services/contact-support/ for how to contact Aruba TAC. Any opinions expressed here are solely my own and not necessarily that of Hewlett Packard Enterprise or Aruba Networks.

    In case your problem is solved, please invest the time to post a follow-up with the information on how you solved it. Others can benefit from that.
    ------------------------------

    Original Message


  • 7.  RE: S2500 Host Port - Trunk Allow VLAN All - DAC cable or port settings?

    Posted Sep 15, 2021 03:01 PM
    It was the DAC cables.

    I purchased  JW102A   and it connected at 10Gb without issue.

    Is their any means to tell the switch to just ignore DAC SFP manufacture check for passive cables.  I have tested six brands and only ones that work with hosts are the Aruba branded one..

    ------------------------------
    Jeremey Wise
    ------------------------------

    Original Message


  • 8.  RE: S2500 Host Port - Trunk Allow VLAN All - DAC cable or port settings?

    EMPLOYEE
    Posted Sep 16, 2021 05:30 AM
    As far as I know, there is no checking for Aruba branded (except for the display of Aruba Certified). There is no active blocking. However, I heard discussions from the people the engineer these switches, and especially for DAC cables (because these need to be supported at both ends), there needs to be specific code in to support certain SFP+ modules. Apparently, the SFP+ interface is not so standardized that any module will work in any slot. It sounds simple, but what I heard is it isn't, unfortunately.

    Glad that you have a working cable at least.

    ------------------------------
    Herman Robers
    ------------------------
    If you have urgent issues, always contact your Aruba partner, distributor, or Aruba TAC Support. Check https://www.arubanetworks.com/support-services/contact-support/ for how to contact Aruba TAC. Any opinions expressed here are solely my own and not necessarily that of Hewlett Packard Enterprise or Aruba Networks.

    In case your problem is solved, please invest the time to post a follow-up with the information on how you solved it. Others can benefit from that.
    ------------------------------

    Original Message


  • 9.  RE: S2500 Host Port - Trunk Allow VLAN All - DAC cable or port settings?

    Posted Sep 16, 2021 10:41 AM
    Thanks for response.

    so " .. no checking for Aruba branded.."  but... "..there needs to be specific code"

    And real world translation of that is  if its not an Aruba DAC, it won't work.  Even though these short cables are "passive".  Passive in that their are no signal conversations required due to latency degradation concerns between ends... and so "just copper". 

    Just so I am not miss-stating..  I know this is an older Aruba (pre HPe) switch.. so maybe this "lock in" has been corrected..  One can only hope.  This kind of forcing re-cabling for 1-5meter runs when switch vendor change is made ... makes customers hate a vendor (a large one which shall not be named)...  lets hope Aruba is not on that list of SFP "ours or we don't work" list.

    ------------------------------
    Jeremey Wise
    ------------------------------

    Original Message


  • 10.  RE: S2500 Host Port - Trunk Allow VLAN All - DAC cable or port settings?

    EMPLOYEE
    Posted Sep 16, 2021 11:24 AM
    With code, I mean driver code, not a vendor-id code. Different SFP modules require different driver code, which also has to do with some vendors locking in. And a DAC cable is not 'just wires', it has a transceiver in it, it just doesn't have connectors. If it was just copper, you would not be able to see a type and serial number. I'm not aware of any blocking or vendor id allowlisting in the MAS switches, and the table in the documentation was more to list the tested and supported transceivers/DAC cables. If cables/SFPs don't work, there is a technical reason for that.

    I definitely heard that some third-party transceivers were supported and working, and even on a case-by-case basis even support was added. As you mention the MAS switches are end-of-sale and nearly end-of-support, so it's unlikely to get those DACs supported on this switch.

    Your sample set may just be unlucky, where if these were specific branded, that didn't help either as some vendors may have made their cables incompatible by design to support vendor lock in in their switches. Also, as mentioned DACs have their own challenges, with other SFPs the results may have been better.

    ------------------------------
    Herman Robers
    ------------------------
    If you have urgent issues, always contact your Aruba partner, distributor, or Aruba TAC Support. Check https://www.arubanetworks.com/support-services/contact-support/ for how to contact Aruba TAC. Any opinions expressed here are solely my own and not necessarily that of Hewlett Packard Enterprise or Aruba Networks.

    In case your problem is solved, please invest the time to post a follow-up with the information on how you solved it. Others can benefit from that.
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