470-48T switches can I do this?

470-48T switches can I do this?

Post by Ron » Mon, 02 Apr 2007 13:39:39

Hello everyone,

I have a stack of three 470-48T switches cascaded and I have a gigabit
modual in switch 1 and 3 and I have a multi link trunck set up and two
fibers going to my core from the switches.

My base switch IP is:

My fibers are going into the core, one is on the 172.16.x.x vlan while
another is on the 192.168.1.x vlan.

I have a number of vlans running out of my 8600 core a 204.80.158.x,, a and

My question is with the switch stack IP of can I push out
all my vlans to the switch group and then say make ports 1 through 24
vlan 204.80.158.x and ports 25 through 40 vlan 172.16.32.x and ports
41 through 48 vlan 172.16.16.x can I do this push my vlans out to
the port even though the 470's are layer 2 switches I heard I can do
this....is that right and how would I do it?

I guess how do I pull down all the vlan info from my core to the stack
and then go from there?


470-48T switches can I do this?

Post by Doph » Mon, 02 Apr 2007 23:27:07

Setup 3 VLAN's on your switch as your mention first.
After it, set fiber ports as a trunk port with MLT to connect


470-48T switches can I do this?

Post by Charles R. » Thu, 05 Apr 2007 05:26:29

All ports that are members of a Multi Link Trunk must be in the same
VLANs or things won't work right. All MLT port members must be
configured identically.

Ok, so call 204.80.158.x VLAN 1, VLAN 2, VLAN
3, and VLAN 4. The actual VLAN numbers you use must match
those that are used on the core switch.

You don't "pull down" VLAN info dynamically. You configure all the
VLANs statically, first for the trunk:

vlan port 1/48,3/48 tagging tagAll
vlan members add 1 1/48,3/48
vlan members add 2 1/48,3/48
vlan members add 3 1/48,3/48
vlan members add 4 1/48,3/48
vlan port 1/48,3/48 pvid 1
mlt 1 member 1/48,3/48
mlt 1 enable

Then the user ports e.g. on stack unit number 2:

vlan members add 1 2/1-24
vlan members add 3 2/25-40
vlan members add 2 2/41-48

470-48T switches can I do this?

Post by Ron » Wed, 11 Apr 2007 15:44:36

OK I am doing this all through the console, can I do that?
I've setup my mlt and that seems to to working, my stack ip is and my mlt is plugged into the core and on vlan172_32

my vlans are:

I've created vlans on my stack named the same as on the core eg:
vlan172_16 etc, and made them active

I created the vlan192 and set port 3 on switch 1 to it, even though
the whole stack is on the vlan172_32
I then plugged a PC into port 3 on switch one and tried to pull a
192.168.1.x address and it would not get one. I then statically gave
it an address of and still I had no access to my

If I plug something into the switch ports and give it a 172.16.32.x
address I am fine and can get on the network.

Why is my vlan192 not getting through to port 3? Any ideas?


470-48T switches can I do this?

Post by Doph » Wed, 11 Apr 2007 22:54:09

n Apr 10, 2:44 pm, "Ron" < XXXX@XXXXX.COM > wrote:

You should set the same VLAN for 192 on core switch.
After it, set the ports or MLT on ES470 and core switch as trunk port.
Finally, set DHCP relay (IP helper) on your core switch to let your
clients in VLAN 192 can get IP address from DHCP server.


470-48T switches can I do this?

Post by Ron » Thu, 12 Apr 2007 04:32:09

n Apr 10, 9:54 am, "Dophi" < XXXX@XXXXX.COM > wrote:

My core has all my vlans on it, I can make any port on the core any of
my vlans.
I put my fibers into ports 4 and 6 on the core, I then set core ports
4 and 6 to vlan172_32 because my stack IP is

If my switch stack IP was: I would make ports 4 and 6 on
ports be vlan192, but my switch stack has a address.

Now when I am plugged into the fiber my 3 switches in the stack all
work, meaning any PC plugged into any switch and any port on the
switch can be assigned a 172.16.32.x address.

But I want to for example plug PC into switch 1 of my group and ports
3 through 20, I want to be able to plug in computers with a
192.168.1.x address .....When I goto switch 1 and choose to make ports
3 through 20 vlan192 it seems to work but If I plug a 192.168.1.x PC
into one of those ports it can not get out on the network...its like
the 192 is not being passed to those ports.

any ideas?


470-48T switches can I do this?

Post by Doph » Fri, 13 Apr 2007 00:16:58

n Apr 11, 3:32 am, "Ron" < XXXX@XXXXX.COM > wrote:

For your question, I would like to know what you set for port 4 and 6
of the core switch. I assume that you only assign port 4 and 6 of the
core switch to VLAN172_32 and use fibers to connect to the ES470
stack. The packets of VLAN172_32 can go to core switch through ES470
because you set port 4 and 6 to VLAN172_32. If you want the packets of
VLAN192_168 can also go to core switch, you should also set port 4 and
6 to VLAN192_168 on core switch. As the result, port 4 and 6 on core
switch will be the members of both VLAN172_32 and VLAN192.168 as trunk
ports. These can be done by 802.1q tagging on ERS8600 and ES470.

For example, the port members of VLAN's should look like this when you
use port 2/48 and 3/48 to connect to ERS8600;

ES470-48T stack
VLAN172_32 : 2/1-3/48
VLAN192_168: 1/3, 2/48, 3/48
(2/48 and 3/48 are trunk ports and MLT members)

VLAN172_32 : 1/4, 1/6
VLAN192_168 : 1/4, 1/6
(1/4 and 1/6 are trunk ports)

On ERS8600, turn on the DHCP relay on the interface IP of VLAN192_168
and setup relay agent IP address.


470-48T switches can I do this?

Post by Ron » Tue, 17 Apr 2007 09:57:27

n Apr 11, 11:16 am, "Dophi" < XXXX@XXXXX.COM > wrote:

When I turn on Perform Tagging for Ports 1/4 and 1.6 on my core the
470 stack goes dead, meaning I can no longer see it on my network.


470-48T switches can I do this?

Post by Charles R. » Wed, 18 Apr 2007 02:43:25

You might want to read "Configuring VLANs, Spanning Tree, and
MultiLink Trunking" here, starting at page 37:


470-48T switches can I do this?

Post by John » Wed, 09 May 2007 03:03:06

Your management VLAN has to be defined in your trunk group and the switch
stack told what VLAN you want to use.