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how to set a vlan connection for cisco 2950, 3550 and 2900?

 
 
Little
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      06-22-2004
I've a newbie on cisco, please help.

A 2900 switch, all ports ==> vlan2 (10.1.1.0/24), which is the
management network. (no port is assigned to vlan1)
A 2950 switch, port 1-22 ==> vlan1 (192.168.201.0/24), which is the
production network.
A 3550 switch, Gig 1-8 ==> vlan1 (192.168.201.0/24), which is also the
production network.

A MRTG+BB server is setup at 10.1.1.0 network, I want the MRTG server
can capture the traffic of 2950 and 3550. I tried to use vlan to hook
up the 3 devices, but failed. I've already connected the Fa0/23 of
2950 and Fa0/2 of 3550 to the 2900 by cross cables.

I want both the Fa0/23 of 2950 and Fa0/2 of 3550 can have the 10.1.1.x
ip setup, so the mrtg server can connect to them. But I have no idea
how to do it and how to setup the vlan for both, can anyone help?
Many thanks.
 
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Bill F
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      06-22-2004
You've created 2 vlans with 2 associated ip subnetworks. You can only
address a vlan interface on it's associated subnet, i.e
vlan 1 192.168.201.x/24
vlan 2 10.1.1.x/24

You can create a vlan interface for both on any/all of the switches .
You'll also want to trunk the uplink ports.

Little wrote:
> I've a newbie on cisco, please help.
>
> A 2900 switch, all ports ==> vlan2 (10.1.1.0/24), which is the
> management network. (no port is assigned to vlan1)
> A 2950 switch, port 1-22 ==> vlan1 (192.168.201.0/24), which is the
> production network.
> A 3550 switch, Gig 1-8 ==> vlan1 (192.168.201.0/24), which is also the
> production network.
>
> A MRTG+BB server is setup at 10.1.1.0 network, I want the MRTG server
> can capture the traffic of 2950 and 3550. I tried to use vlan to hook
> up the 3 devices, but failed. I've already connected the Fa0/23 of
> 2950 and Fa0/2 of 3550 to the 2900 by cross cables.
>
> I want both the Fa0/23 of 2950 and Fa0/2 of 3550 can have the 10.1.1.x
> ip setup, so the mrtg server can connect to them. But I have no idea
> how to do it and how to setup the vlan for both, can anyone help?
> Many thanks.


 
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Guest
Posts: n/a
 
      06-22-2004
Thanks for your reply. I did try to add vlan 2 at 2950, but it is always
shutdown. Then if I typed "no shutdown" for vlan 2, it will down vlan 1.

I also tried to add the following codes at Fa0/23 of 2950 without creating a
vlan 2 at 2950 and it turns out I can ping from 2950 to the 10.1.1.254,
which is the 2900 ip:
switchport access vlan 2
switchport mode trunk

However, I don't know where to set the 10.1.1.x ip for 2950. Any idea?

"Bill F" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed)...
> You've created 2 vlans with 2 associated ip subnetworks. You can only
> address a vlan interface on it's associated subnet, i.e
> vlan 1 192.168.201.x/24
> vlan 2 10.1.1.x/24
>
> You can create a vlan interface for both on any/all of the switches .
> You'll also want to trunk the uplink ports.
>
> Little wrote:
> > I've a newbie on cisco, please help.
> >
> > A 2900 switch, all ports ==> vlan2 (10.1.1.0/24), which is the
> > management network. (no port is assigned to vlan1)
> > A 2950 switch, port 1-22 ==> vlan1 (192.168.201.0/24), which is the
> > production network.
> > A 3550 switch, Gig 1-8 ==> vlan1 (192.168.201.0/24), which is also the
> > production network.
> >
> > A MRTG+BB server is setup at 10.1.1.0 network, I want the MRTG server
> > can capture the traffic of 2950 and 3550. I tried to use vlan to hook
> > up the 3 devices, but failed. I've already connected the Fa0/23 of
> > 2950 and Fa0/2 of 3550 to the 2900 by cross cables.
> >
> > I want both the Fa0/23 of 2950 and Fa0/2 of 3550 can have the 10.1.1.x
> > ip setup, so the mrtg server can connect to them. But I have no idea
> > how to do it and how to setup the vlan for both, can anyone help?
> > Many thanks.

>



 
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Bill F
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      06-22-2004


Little wrote:
> Thanks for your reply. I did try to add vlan 2 at 2950, but it is always
> shutdown. Then if I typed "no shutdown" for vlan 2, it will down vlan 1.


I don't know why that is. What's the output of "sh vlan"
and "sh vtp status" on each switch. You should see both vlans listed.

>
> I also tried to add the following codes at Fa0/23 of 2950 without creating a
> vlan 2 at 2950 and it turns out I can ping from 2950 to the 10.1.1.254,
> which is the 2900 ip:
> switchport access vlan 2 # you can remove this line
> switchport mode trunk


...add
switchport trunk encapsulation dot1q

>
> However, I don't know where to set the 10.1.1.x ip for 2950. Any idea?
>


You have to create the vlan 2 int to be able to address it on that subnet.

 
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