I would like to take a step back a look at the overall environment.  The 5448 switch does not have any routing capabilities it is a Layer 2 switch.  So you can have VLANs set up.  Then trunk/general switchport connect to a switchport on a router.  Then the routing would take place on that device.  

What specific devices are connecting to the switches?  If multiple ports are connecting to a single server or switch/router then you would want to set up a LAG (Link Aggregation).  This is a virtual merging of multiple physical ports into into one connection.

Example of LAG configuration:

STATIC LAG

console#

console# configure

console(config)# interface range ethernet g1 – g4  ß Range command (optional)

console(config-if)# channel-group 1 mode on ß Assign Group and mode (static)

console(config-if)# end

Creating LAGs – Dynamic LACP LAG

console> enable

console# configure

console(config)# interface range ethernet g1-2

console(config-if)# channel-group 1 mode auto

console(config-if)# exit

console(config)#

Once you have the LAG configured on the physical ports you would enter the Port-Channel  and set up the switchport mode for the LAG.

Channel-Group 1 creates Port-Channel 1

This should get us started.

Let us know if you have further questions.

Image link:

postimg.org/.../g6i4jjnh9

postimg.org/.../6jk4qbhr1

@DELL-Willy M

Sorry, I was not complete in my explaining.

This is the complete setup:

http://s22.postimg.org/g6i4jjnh9/teklab.jpg

http://s22.postimg.org/6jk4qbhr1/teklablogic.jpg

1 X ROUTER CISCO connected in Internet Networks (RED) in VLAN  5

1 X DELL 2850 With IPFIRE (Linux Firewall\Proxy\Gateway) with 4 interface:

1 for Internet Networks (RED) in VLAN  5

1 for Prod Network (GREEN) in VLAN1

1 for DMZ Network (ORANGE) in VLAN 10

1 for Guest Network (BLUE) in VLAN 8

CLUSTER VMWARE ESXi 5.1

2 X DELL 2950 (each host four interfaces)

1 Fisical Interface for each host VLAN 1 Production Switch 1

1 Fisical Interface for each host VLAN 1 Production Switch 2

1 Fisical Interface for each host VLAN  20 iSCSI Switch 1

2 Fisical Interface for each host VLAN  20 iSCSI Switch 2

3 X DELL 1950 (each host six interfaces)

1 Fisical Interface for each host VLAN 1 Production Switch 1

1 Fisical Interface for each host VLAN 1 Production Switch 2

1 Fisical Interface for each host VLAN  20 iSCSI  Switch 1

1 Fisical Interface for each host VLAN  20 iSCSI  Switch 2

1 Fisical Interface for each host VLAN 10 DMZ Switch1

1 Fisical Interface for each host VLAN 10 DMZ Switch2

1 X DELL M3220i

4 Fisical Interface for each host VLAN  20 iSCSI Switch 1

4 Fisical Interface for each host VLAN  20 iSCSI Switch 2

Can I use LAG for 8 interfaces and manage iSCSI traffic of MD3220i 2950 \ 1950?

I hope you understand what I mean with drawings.

Thanks for support!

You can set up to 8 physical ports in a LAG on the 5448 switch.

I would suggest working in stages.  Start with the upstream connection to the Cisco devices.  Then verify that you can reach the router by pinging the router from a port in default VLAN 1 with no configuration.  This is assuming you have an IP set for the switch (VLAN 1) and the default gateway.

The following example defines an ip default gateway.  Where the address is the next hop address (address on the CIsco)

Console(config)# ip default-gateway 192.168.1.1

You will want a trunk or general switchport (depending on the compatibility) set on port connecting to the router.  

The following example shows how to add VLANs 2 and 5 to 8 to the allowed list of g8:

Console (config)# interface ethernet g8

Console (config-if)# switchport trunk allowed vlan add 2,5-8

The following example of an additional line on the g8 interface, in trunk mode, is configured to use VLAN number 1 as the "native" VLAN.

Console (config-if)# switchport trunk native vlan 1

Then try from a laptop connected to a non configured port with an IP in the range of the subnet matching the range for VLAN 1.  The default gateway for the laptop would be the IP assigned to the switch (VLAN 1).

Here is link to all the manuals available for the 5448:

www.dell.com/.../powerconnect-5424

@DELL-Willy M

Hi, today I completed the test  VLAN router configuring ports as trunk, everything seems to work OK.

My question now is:

I can interconnect with fiber cables SFP g45 switch1 to g45 switch2 for exchange traffic of VLAN 1?  and do the same for iSCSI VLAN 20?

Well, works great! Thanks a lot Willy!

Now i need to setup a LAG for iSCSI connection cooper from DELL MD3220i:

4 cooper on VLAN 20 Switch1 port 1-12

4 cooper on VLAN 20 Switch 2 port 33-44

can suggest the console commands?

Thanks a lot!

Here is an article about configuring iSCSI on the 5400.  The only problem is that it is written for someone who is dedicating the whole switch to iSCSI traffic.  This is a recommended set up.  Although that is not always the case when you have budgetary constraints.

en.community.dell.com/.../configuring-a-powerconnect-5424-or-5448-switch-for-use-with-an-iscsi-storage-system.aspx

Basically you will want these commands set on the LAG connecting to the MD3220i.  Normally you would turn on Jumbo Frames for just the ports using iSCSI.  The 5400 model only allows you to enable Jumbo frames for the whole device, not single interfaces.  This is something that you will need to consider.  As far as what is best for your environment.

console(config)# interface range ethernet g(22-24)

console(config-if)#channel-groupt xx on/auto

console(config-if)#exit

console(config)# interface port-channel xx

console(config-if)#switchport mode access

console(config-if)# switchport access vlan 20

console(config-if)# flowcontrol on

console(config-if)# spanning-tree portfast

Sorry for the misunderstanding,  The on/auto is and option.  You will need to choose one or the other.  

channel-group

The channel-group Interface Configuration mode command associates a port with a port-channel. Use the no form of this command to remove a port from a port channel.

Syntax

•channel-group port-channel-number mode {on | auto}

•no channel-group

•port-channel_number — Specifies the number of the valid port-channel for the current port to join.

•on — Forces the port to join a channel.

•auto — Allows the port to join a channel as a result of an LACP operation.

The following example shows how port g5 is configured to port-channel number 1 without LACP.

Console (config)# interface ethernet g5

Console (config-if)# channel-group 1 mode on

Hello Willy, as always thanks for your help.

I read the article you're talking about and I set my iSCSI ports with this "features":

switchport mode general

spanning-tree mode rstp

spanning-tree portfast

flowcontrol on

port jumbo-frame

On port range g(1-12) ports from MD3220i and ports to Servers; iSCSI works great!

But, if i want to enable LAG I can set lag only by ethernet coming from MD3220i or even the ethernet going to the servers?

Another question:

when I insert your code I get this error:

pcvmware1(config-if)# channel-group 3 on/auto

% Wrong number of parameters or invalid range, size or characters entered

pcvmware1(config-if)# channel-group 3 on

% Wrong number of parameters or invalid range, size or characters entered

pcvmware1(config-if)# channel-groupt 3 on/auto

% Unrecognized command

Thanks a lot