VLANs problem

[mcabrera]

Hi folks !!!

I need to intrgrate (using a TRUNK port) between a 3COM Baseline SW and a CISCO 2950 (or whatever)

My 3COM device is:

Product Information
3Com Baseline Switch 2928-SFP Plus Software Version Release 1101P02

The issue:

port 1 as trunk with 2 VLANs tagged (10 and 11)

port 2 and 3 with tagged 10 and 11 VLANs

and port 4 using the default VLAN that is: VLAN 1

The problem is that when i configure the tagged VLANs on the ports 2 and 3 the systems said: THE PORT WILL BE A HYBRID PORT and i think that the port must be ACCESS or not?

When i set the TRUNK mode on my device and TRUNK mode on the remote CISCO device, i lost the conenction.

The VLAN 1 is traing to go to the CISCO device? i need isolate this VLAN on the port 1 (set as TRUNK)

I did read the manual, but i cant resolve it.

Pls help me !!!

matt

[Inge_Suzzy]

Let me understand.

port 1 is something like this : int gig1/0/1 

                                                      port link-type trunk

                                                      port trunk permit vlan 10 11

port 2 and 3 : int gig 1/0/2   y   int gig 1/0/3

                        port link-type access

                        port access vlan 10 11

port 4: bye default it's on vlan 1 so you don´t have to configure something.

Do I understand what do you want?

on the switch cisco

 do yo have something like this

X--> the port that you have as link between switch 3com and cisco

port X:  switchport trunk encapsulation dot1q

             switchport mode trunk

If the switch cisco don't have de encapsulation dot1q, it can't manage vlans, 3com switches have this encapsulation by default.

Good luck

[mcabrera]

Yes, but i cant set my ports 3 and 4 as ACCESS when i assign a VLAN ID it was set in HYBRID mode...my be this is the problem.

Port 1: trunk and VLANs 10 and 11 tagged

Port 2: access VLAN 10, tagged

Port 3: access VLAN 11, tagged

Port 4: untagged VLAN 1 (by default, because i use this port for other proposes)

thing that: port 2 of my 3com is directly connected to eth0 of my machine that have 3 ifaces, later port 3 connected to eth1 and port 4 connected to eth2 in the same machine

The CISCO conf is not on my domain (is a customer), but i think thats fine...

My question are:

- Are ports 2 and 3 tagged or untagged?

- In this ports (2 and 3) which are the mode: access or hybrid? if access how can i set it?

matt

[mcabrera]

correct: "Yes, but i cant set my ports 2 and 3 as ACCESS when i assign a VLAN" instead of "Yes, but i cant set my ports 3 and 4 as ACCESS when i assign a VLAN"

[Audie]

I know this is an old thread, but here goes nothing. Vlan tagging should only be set on an an interface for three reasons:

1 -  This is a trunk interface that will be connected to another switch that will have the same vlan(s) configured on it.

2 - This is a port connected to a router that will be performing inter-vlan routing.

3 - This is a port connected to a server NIC that is capable of understanding VLAN tags.

Configuring untagged access ports would be the way to go for all workstations and servers that reside on one VLan.