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VLAN dot1q with 3 VLANs betweem a CISCO and HP procurve 2524 switch

Lora Ganeva
Regular Advisor

VLAN dot1q with 3 VLANs betweem a CISCO and HP procurve 2524 switch

I'm trying to put a link with three VLANs between HPprocurve switch and Cisco switch, but I feel like they don't speak the same language.What could be the problem..
11 REPLIES
benoit Bruckert
Honored Contributor

Re: VLAN dot1q with 3 VLANs betweem a CISCO and HP procurve 2524 switch

Hi,
I don't know about HPprocurve, but with CISCO you have to be carefull :
When you define your trunk on the port, don't forget top specify that you want to use dot1q and not isl.
Isl is the old way that cisco used to comuunicate.
If your IOS is old, the default for a trunk is ISL, if it's not old it's dot1q the default !! (ISL disaperead now from cisco switches).
I had this kind of trouble when I received new switches and try to communicate with old switches on trunks (one switch was isl, the other was dot1q !).

hth
Benoit
Une application mal pansée aboutit à une usine à gaze (GHG)
Lora Ganeva
Regular Advisor

Re: VLAN dot1q with 3 VLANs betweem a CISCO and HP procurve 2524 switch

Thank You for quick response..but I've set the encapsulation on the CISCO as dot1q
Lora Ganeva
Regular Advisor

Re: VLAN dot1q with 3 VLANs betweem a CISCO and HP procurve 2524 switch

vlan 1
name "DEFAULT_VLAN"
untagged 7-13,15-26
tagged 1-3
no ip address
exit
vlan 2
name "vlan2"
untagged 4-6,14
tagged 1,3
ip address 172.16.1.85 255.255.255.0
exit
vlan 4
name "it"
tagged 1-2
no ip address
exit
The upper is the configuration of my procurve switch..I've connected a device with ip=172.16.3.173 to port 2 and I've connected port 1 to the CISCO port with encapsulation dot1q..and I have no connection to the device connected to port 2.
when I chenge the address of the same device to 172.16.1.173 and connect it to port 3(VLAN 2) i have a ping to it..This is the problem
Pierre LEPESTEUR
Occasional Visitor

Re: VLAN dot1q with 3 VLANs betweem a CISCO and HP procurve 2524 switch

what is the ip adress of your device (not the 172.16.3.173), the gateway ...
Your switch configuration seems OK, maybe it the configuration of your computer?
benoit Bruckert
Honored Contributor

Re: VLAN dot1q with 3 VLANs betweem a CISCO and HP procurve 2524 switch

I don(t know about procurve,
but do have some logs on the cisco side ??
try a debug something ?

Benoit
Une application mal pansée aboutit à une usine à gaze (GHG)
lora ganeva_2
Occasional Visitor

Re: VLAN dot1q with 3 VLANs betweem a CISCO and HP procurve 2524 switch

Debug on the cisco shows nothing..and everything is okay with the computer-default gateway and so..on
benoit Bruckert
Honored Contributor

Re: VLAN dot1q with 3 VLANs betweem a CISCO and HP procurve 2524 switch

What is exactly the trouble ?
Can you ping the procurve switch from the cisco switch ?
if yes then it means that the trunk is OK .
Can you ping your device connected on procurve from procurve ? from another device on the CIsco ?
If you can't from the procurve, it means there's a error on the vlan conf of the procurve, or cable or anything.
Can you ping your device if you connect it directly on the cisco on the proper vlan port ??
Many questions, but I didn't understand exactly the trouble you have ...

Benoit
Une application mal pansée aboutit à une usine à gaze (GHG)
lora ganeva_2
Occasional Visitor

Re: VLAN dot1q with 3 VLANs betweem a CISCO and HP procurve 2524 switch

The only trouble is that I cannot ping my device connected to the procurve if the device is in other vlan than the vlan which has an ip address on the procurve.
benoit Bruckert
Honored Contributor

Re: VLAN dot1q with 3 VLANs betweem a CISCO and HP procurve 2524 switch

Lora,
At this level, it seems to be more procurve specific I don't think I can help you any more (I only use bay and cisco)....
Hope you'll find the solution.

regards
Benoit

PS if you define ip address on port 2 it works ??
Une application mal pansée aboutit à une usine à gaze (GHG)
Ron Kinner
Honored Contributor

Re: VLAN dot1q with 3 VLANs betweem a CISCO and HP procurve 2524 switch

When you say "I've connected a device with ip=172.16.3.173 to port 2 and I've connected port 1 to the CISCO port with encapsulation dot1q..and I have no connection to the device connected to port 2.
when I change the address of the same device to 172.16.1.173 and connect it to port 3(VLAN 2) i have a ping to it..This is the problem "

Where are you pinging from? What IP address and VLAN? What Device? Does the Device know about VLAN2? If the pinging source is not on either switch, how is it connected? Is there a router in the way? Does either switch do level 3?

What do
sh vers
and
sh trunk
show on the Cisco?

Ron

lora ganeva_2
Occasional Visitor

Re: VLAN dot1q with 3 VLANs betweem a CISCO and HP procurve 2524 switch

thank Yoy all for replying..the problem was that a command in the cisco device, which should be enabled by default was not..this command is not visible in the configuration:
"switchport trunk allowed vlan all"