I have an HP ProCurve 2910al running pretty much factory defaults on it at There are 2 VLANS on it.

  • Ports 1-12 are VLAN 1 (untagged)
  • Ports 13-21 are VLAN 2 (Untagged)
  • Port 22 is a TRUNK (Trk1) (Tagged)
  • Port 23 is a TRUNK (Trk2) (Tagged)
  • Port 24 is a TRUNK (Trk3) (Tagged)

They connected to 3 Black Box LGB2118A Switches (, 52, 53) running factory defaults excempt for VLANs. On each switch Port 1-15 are currently untagged for VLAN 1. Port 16 is a TRUNK (PVID 1) (Tagged).

Now the strange part is if I connected to a blackbox switch I can ping the HP switch. I can ping the server on the HP switch. I CAN NOT ping the other black box switches. I can ping computers connected to those Black Box switches but not the switches themselves. I also can't get to their management pages. From a machine connected to the HP switch I can't ping or reach the management pages for them.

Anyone have any idea any I can't talk through the HP switch to my switches or reach their management pages but I can access computers through the blackbox switches?

EDIT: addition of diagram. Have to pull the configuration off the switches could take some time.

enter image description here

EDIT: Here are the configs

HP ProCurve 2910

 Running configuration:

; J9145A Configuration Editor; Created on release #W.14.38

hostname "SWITCH2" 
time timezone -300 
module 1 type J9145A 
interface 1 
   name "DC" 
interface 2 
   name "SERVER" 
interface 3 
   name "COMPUTER3" 
interface 4 
   name "COMPUTER1 (Test Box 1 Black)" 
interface 5 
   name "COMPUTER2  (Test Box 2 Black)" 
interface 6 
   name "Open (Test Box 3 Black)" 
interface 7 
   name "Open (Test Box 4 Black)" 
interface 8 
   name "Open (Test Box 5 Black)" 
interface 9 
   name "Open (Test Box 6 Black)" 
interface 10 
   name "Open (Test Box 7 Black)" 
interface 11 
   name "Open (White Test Net)" 
interface 12 
   name "Open (White Test Net)" 
interface 13 
   name "Open (Test Box 1 White)" 
interface 14 
   name "Open (Test Box 2 White)" 
interface 15 
   name "Open (Test Box 3 White)" 
interface 16 
   name "Open (Test Box 4 White)" 
interface 17 
   name "Open (Test Box 5 White)" 
interface 18 
   name "Open (Test Box 6 White)" 
interface 19 
   name "Open (Test Box 7 White)" 
interface 20 
   name "Trunk (TCC)" 
interface 21 
   name "Trunk (Sandbox)" 
interface 22 
   name "Trunk (Lab)" 
interface 23 
   name "Trunk (Office)" 
interface 24 
   name "Trunk (Upper)" 
trunk 24 Trk1 Trunk 
trunk 23 Trk2 Trunk 
trunk 22 Trk3 Trunk 
ip default-gateway 
vlan 1 
   name "NETWORK" 
   forbid 11-19 
   untagged 1-10,20-21 
   ip address 
   tagged Trk1-Trk3 
   no untagged 11-19 
vlan 2 
   name MAIN-DEV" 
   forbid 1-21 
   tagged Trk2-Trk3 
   no ip address 
vlan 3 
   name "DEV-LAN-1_(Orange)" 
   forbid 1-21 
   tagged Trk2-Trk3 
   no ip address 
vlan 4 
   name "DEV-LAN-2_(White)" 
   forbid 1-10,20-21 
   untagged 11-19 
   tagged Trk1-Trk3 
   no ip address 
snmp-server community "NETWORK" unrestricted
snmp-server contact 
spanning-tree Trk1 priority 4
spanning-tree Trk2 priority 4
spanning-tree Trk3 priority 4
no autorun
password manager

EDIT: I am trying to extend my VLAN1 network to 4 locations while still being able to extend VLAN 2-4 if I need to them. They will need to be available in other areas moving forward. So VLAN1 is the management network and the other VLANS will be doing other work.

  • You need to edit your question to include a diagram of how the switches are connected, and the switch configurations.
    – Ron Maupin
    Commented Jan 19, 2018 at 16:03
  • Did any answer help you? If so, you should accept the answer so that the question doesn't keep popping up forever, looking for an answer. Alternatively, you could provide and accept your own answer.
    – Ron Maupin
    Commented Apr 1, 2018 at 19:47

3 Answers 3


You've made the classic mistake:

Different manufacturers use different terminology

HP calls them Trunks-- Cisco calls them Port channels

In other words, you're using the wrong commands


In HP jargon, trunking is port aggregation (LAG), unrelated to VLAN trunking. A LAG trunk with just a single port doesn't make much sense unless you're planning to extend it neatly. You should consider using LACP trunks if possible though.

On HPE switches, VLAN trunks require no special configuration. You just assign (one) untagged or (several) tagged VLANs to a port or LAG trunk.

Trk1-Trk3 (ports 24-22 respectively, contrary to your question) only carry tagged VLAN traffic. This requires the Blackbox switches to be configured in the same way. Egress traffic with or without a VLAN tag that isn't matched on the neighbor switch is dropped. Traffic with VIDs 2 and 3 from the 2910 will be dropped on the Blackboxes.

The 2910 should be pingable from all ports belonging to VLAN 1. It's got no IP address on the other VLANs and routing isn't activated. The Blackbox switches are pingable on whatever VLAN they are configured on - all ports are members of VLAN 1 however, so if there are other VLANs on the Blackboxes there's no connection.

All in all, the configuration doesn't make too much sense. Maybe you should edit your question to include what you're trying to do.

  • So it sounds like your saying the Trunk is not setup and the ports aren't tagged correctly for VLAN1. The strange part is all the Black Boxes are configured for VLAN1 but if you ping a switch from another switch through the 2910 they get nothing back even though they are on the same VLAN. Do I have that correct?
    – JukEboX
    Commented Jan 22, 2018 at 15:00
  • added more information as to what I am trying to do to the system question.
    – JukEboX
    Commented Jan 22, 2018 at 16:30
  • 1
    VLAN 1 frames leave the 2910 tagged - are they tagged on the Black Boxes as well? They need to be the same on both sides.
    – Zac67
    Commented Jan 22, 2018 at 17:50
  • on the port going in from the HP switch on the Black Box it is set to Trunk as Tagged. They are the same on both sides.
    – JukEboX
    Commented Jan 22, 2018 at 18:25

Found the answer to this by calling the manufacturer.

On the Black Box switches the ports for trunks had to be set to C-PORTs and the PVID has to be set to the management VLAN. All check in now correctly.

  • You should accept your answer so that the question doesn't keep popping up forever, looking for an answer.
    – Ron Maupin
    Commented Apr 2, 2018 at 18:35

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