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04-23-2013 07:45 AM
04-23-2013 07:45 AM
Trunk from HP A5820 to Cisco 3750
Hi,
I wonder if somebody can help with my issue.
I have been asked to setup a trunk between a Cisco switch on our nornal network and a HP A5820 that will host our SAN. The problem I have is that when I bring up a device on either VLAN 3 or 4 on the HP side it cannot pick up a DHCP address from a server in VLAN 3 on the Cisco side. If I put an ip helper on the Cisco side then it works.
Also, the servers on the HP side cannot see the windows domain when doing a network browse.
Both or the problems above seem to point to broadcast issues across the trunk port between the switches.
The config of the relevant ports is listed below.
Cisco switch
interface TenGigabitEthernet4/1/1
description *** SAN TRUNK Port ***
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 3,4,200
switchport mode trunk
interface TenGigabitEthernet4/1/2
description *** SAN TRUNK Port ***
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 3,4,200
switchport mode trunk
HP Switch
interface Ten-GigabitEthernet1/0/1
port link-mode bridge
port link-type trunk
port trunk permit vlan 1 3 to 4 200
interface Ten-GigabitEthernet1/0/2
port link-mode bridge
port link-type trunk
port trunk permit vlan 1 3 to 4 200
I am aware I do not have VLAN 1 set on the cisco side. Does this matter?
Also I have not aggregated the ports yet but I assume spanning tree should take care of that. Corect me if I am wrong?
All help is much appreciated with this problem. I have nedium experience with Cisco switches but very little experience with HP switches.
Phil
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04-23-2013 01:05 PM
04-23-2013 01:05 PM
Re: Trunk from HP A5820 to Cisco 3750
Hi,
I'll try something like that:
- remove vlan 1 on HP and DTP on Cisco
Cisco switch
interface TenGigabitEthernet4/1/1
description *** SAN TRUNK Port ***
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 3,4,200
switchport mode trunk
switchport nonegotiate
interface TenGigabitEthernet4/1/2
description *** SAN TRUNK Port ***
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 3,4,200
switchport mode trunk
switchport nonegotiate
HP Switch
interface Ten-GigabitEthernet1/0/1
port link-mode bridge
port link-type trunk
port trunk permit vlan 3 to 4 200
interface Ten-GigabitEthernet1/0/2
port link-mode bridge
port link-type trunk
port trunk permit vlan 3 to 4 200