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dot1q trunking between cisco and hp 1920

 
MathewKEO
Frequent Visitor

dot1q trunking between cisco and hp 1920

Hi,

I'm having trouble trunking between our Cisco Catalyst 4500 and HP 1920G switch. Vlan 5 is not propagating, all other vlans seem to be ok. I'm not able to manage the switch, and no devices in vlan 5 pick up dhcp IP.

Cisco fiber interface:

interface GigabitEthernet2/2
 description 2ndFlrHP117
 switchport trunk encapsulation dot1q
 switchport trunk native vlan 5
 switchport mode trunk

HP 1920G-48

interface GigabitEthernet1/0/49
 port link-type trunk
 undo port trunk permit vlan 1
 port trunk permit vlan 5 11 to 12 16 to 17 19
 port trunk pvid vlan 5
 stp edged-port enable
 qos trust dscp

Appreciate any help. Thanks.

 

7 REPLIES
parnassus
Honored Contributor

Re: dot1q trunking between cisco and hp 1920

Is Spanning Tree enabled on both uplink's ends?

On Cisco Catalyst 4500 side...shouldn't be used also:

switchport trunk allowed vlan 5 11 12 16 17 19

to allow above VLANs through the uplink.

If Spanning Tree is enabled...I suspect that, HPE OfficeConnect 1920 side, VLAN 1 should be permitted to enter the trunk port:

port trunk permit vlan 1 5 11 12 16 17 19

even if you set VLAN 5 as the PVID for that trunk port.

Also:

port link-mode bridge

should be used for that trunk port.

MathewKEO
Frequent Visitor

Re: dot1q trunking between cisco and hp 1920

hi parnassus,

I've made the changes you've suggested, but the issue remains.

I've run

'switchport trunk allowed vlan all' on the cisco switch.

I'm  not able to apply this command on the HP 1920

port link-mode bridge

This is my current config on the interfaces

Cisco core:

interface GigabitEthernet2/2
 description 2ndFlrHP117
 switchport trunk encapsulation dot1q
 switchport trunk native vlan 5
 switchport mode trunk

HP 1920:

interface GigabitEthernet1/0/49

 port link-type trunk

 port trunk permit vlan 1 5 11 to 12 16 to 19

 port trunk pvid vlan 5

 One thing i'd like to add, I'd tested with just the fiber connected to the HP, and I was able to ping vlan 5 from the HP console. But once the users and phones were connected, I lost the ping from the console.

Thanks.

Adam Jones_2
Occasional Visitor

Re: dot1q trunking between cisco and hp 1920

Hi, 

I'm having the same issue. Did you ever figure this out? Many thanks!

MathewKEO
Frequent Visitor

Re: dot1q trunking between cisco and hp 1920

Hi,
No, I haven’t ! :(
Adam Jones_2
Occasional Visitor

Re: dot1q trunking between cisco and hp 1920

That's too bad! Unfortunately, this switch has been deployed to a cabinet in a different state and I no longer have access. Once I find someone to work with, I will likely open a ticket with HP support and I'll let you know if I find anything worth noting. 

MathewKEO
Frequent Visitor

Re: dot1q trunking between cisco and hp 1920

Thanks. Same here, the switch is in a different country, and I can’t spare
resources for this. Appreciate any help.
parnassus
Honored Contributor

Re: dot1q trunking between cisco and hp 1920

Well, at this point it would be essential to share (sanitized) running configurations of both peers...that to try to understand how you configured VLANs and interfaces' VLAN memberships at both ends of the single link uplink.