VLAN Trunking Through ProCurve 2910 to Other Switches

[TmurrayISO]

Greetings.

I have a HP 2910al-24G running as my main switch with my comupters and servers connected to it. Ports 1-12 are set for VLAN1 and Port 13-20 on VLAN2. These are all computer access connections. I am coming into a problem when I get to my Trunks. When I us port 22 -24 to Trunk (non LACP) to the 3 switches in 3 different locations I get some weird behaviour. I need to carry both VLAN1 & 2 through them. They are configured as Trunk Ports with a Trunk group with LACP disabled. 

The other switches are Black Box LGA21118A 18 port managed network switches. So for each trunk port 22-24 one port goes to one of three Black Box Switches. On the Black Box switch the port connecting to the HP switch is set as a Trunk with PVID1. Now if I am on a computer on one of the Black Box switches I can ping the local Black Box Switch and the HP switch. BUT I cannot ping the Black Box Switch on another trunk port of the HP switch (i.e. 23 or 22). I can ping a computer connected to that Black Box switch. It is very strange. 

I also can't get to the management site of that switch. To make it even more strange I cannot ping either of the Black Box switches or reach the management sites if I am connected to the HP switch from any computer on that switch.

This leaves me to believe the trunking is not set correctly. I only need 1 Trunk line to carry both VLANs 1 & 2 to each Black Box Switch from the HP. What have I don't wrong and what is missing? It seems to be some translation between the HP switch and the Black Box switches. 

Here is the configuration of the HP ProCurve 2910al-24G

Running configuration:

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

hostname "SWITCH2" 
time timezone -300 
module 1 type J9145A 
interface 1 
   name "DC" 
exit
interface 2 
   name "SERVER" 
exit
interface 3 
   name "COMPUTER3" 
exit
interface 4 
   name "COMPUTER1 (Test Box 1 Black)" 
exit
interface 5 
   name "COMPUTER2  (Test Box 2 Black)" 
exit
interface 6 
   name "Open (Test Box 3 Black)" 
exit
interface 7 
   name "Open (Test Box 4 Black)" 
exit
interface 8 
   name "Open (Test Box 5 Black)" 
exit
interface 9 
   name "Open (Test Box 6 Black)" 
exit
interface 10 
   name "Open (Test Box 7 Black)" 
exit
interface 11 
   name "Open (White Test Net)" 
exit
interface 12 
   name "Open (White Test Net)" 
exit
interface 13 
   name "Open (Test Box 1 White)" 
exit
interface 14 
   name "Open (Test Box 2 White)" 
exit
interface 15 
   name "Open (Test Box 3 White)" 
exit
interface 16 
   name "Open (Test Box 4 White)" 
exit
interface 17 
   name "Open (Test Box 5 White)" 
exit
interface 18 
   name "Open (Test Box 6 White)" 
exit
interface 19 
   name "Open (Test Box 7 White)" 
exit
interface 20 
   name "Trunk (TCC)" 
exit
interface 21 
   name "Trunk (Sandbox)" 
exit
interface 22 
   name "Trunk (Lab)" 
exit
interface 23 
   name "Trunk (Office)" 
exit
interface 24 
   name "Trunk (Upper)" 
exit
trunk 24 Trk1 Trunk 
trunk 23 Trk2 Trunk 
trunk 22 Trk3 Trunk 
ip default-gateway 192.168.1.1 
vlan 1 
   name "NETWORK" 
   forbid 11-19 
   untagged 1-10,20-21 
   ip address 192.168.1.51 255.255.0.0 
   tagged Trk1-Trk3 
   no untagged 11-19 
   exit 
vlan 2 
   name MAIN-DEV" 
   forbid 1-21 
   tagged Trk2-Trk3 
   no ip address 
   exit 
vlan 3 
   name "DEV-LAN-1_(Orange)" 
   forbid 1-21 
   tagged Trk2-Trk3 
   no ip address 
   exit 
vlan 4 
   name "DEV-LAN-2_(White)" 
   forbid 1-10,20-21 
   untagged 11-19 
   tagged Trk1-Trk3 
   no ip address 
   exit 
gvrp 
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

[Vince-Whirlwind]

1/ Get rid of the "trunk" config on the HP switch. These are not trunks, they are single uplinks to the remote switches.

2/ If your remote switches have VLAN1 as PVID, and the HP uplink port has VLAN1 as tagged, then you have VLAN port misconfiguration - you need to make both ends tagged or both untagged.