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38370
September 28th, 2005 22:00
VLAN "trunking/tagging" PowerConnect 3424 Cisco Catalyst 3424
I recently acquired a PowerConnect 3424 to consolidate the wiring in a 42U rack full of servers. The wires coming out of the rack was a real mess. Now our network architecture is segmented by a Cisco PIx 515E into 6 segments. These are connected to Cisco 5500 switch and ultimately to the jacks.
Firstly I added the required vlans to the database 10,11,12 (to match the VLANS from the Cisco 5500 switch).
Then went into the g4 interface config and used the following commands,
# switchport mode trunk
# switchport trunk allowed vlan add 10,11,12
# switchport trunk native vlan 1
The command for the trunking on Cisco,
interface GigabitEthernet0/1
switchport trunk encapsulation dot1q
switchport trunk native vlan 999
switchport mode trunk
end
That done I have some stupid questions,
- Have I done everything that is required (if all I want on the Dell switch are the 3 vlans, 10, 11, 12 ??). Is there something I missed ??
- Is there any syncronization happening between the 2 dissimlar switches as regards VLAN traffic (like port 12 on Dell switch belongs to VLAN 10, port 12 on Cisco switch
belongs to VLAN 11 ... doe such information "get across"). I reason I asked about the sync is that I assumed there would be some syncing involved as I didnt exactly create
IP subnets (or should I ??) and such information for VLANs on the Dell switch. That information would come from the Cisco switch. Can anyone kindly explain this process.
- The Cisco switch has many more VLANs described, but after trunking a port on it, I will be allowing all VLANs "from it", but on the Dell switch I am only allowing VLANs
10,11,12 "into it". How will that matter or affect anything?
- What happens if I create new VLANs on the Dell switch and not create the same VLAN on the Cisco switch now ?? Will they be "sync'd" across to the Catalyst ??
Kindly advice.
Thanks a bunch.
Firstly I added the required vlans to the database 10,11,12 (to match the VLANS from the Cisco 5500 switch).
Then went into the g4 interface config and used the following commands,
# switchport mode trunk
# switchport trunk allowed vlan add 10,11,12
# switchport trunk native vlan 1
The command for the trunking on Cisco,
interface GigabitEthernet0/1
switchport trunk encapsulation dot1q
switchport trunk native vlan 999
switchport mode trunk
end
That done I have some stupid questions,
- Have I done everything that is required (if all I want on the Dell switch are the 3 vlans, 10, 11, 12 ??). Is there something I missed ??
- Is there any syncronization happening between the 2 dissimlar switches as regards VLAN traffic (like port 12 on Dell switch belongs to VLAN 10, port 12 on Cisco switch
belongs to VLAN 11 ... doe such information "get across"). I reason I asked about the sync is that I assumed there would be some syncing involved as I didnt exactly create
IP subnets (or should I ??) and such information for VLANs on the Dell switch. That information would come from the Cisco switch. Can anyone kindly explain this process.
- The Cisco switch has many more VLANs described, but after trunking a port on it, I will be allowing all VLANs "from it", but on the Dell switch I am only allowing VLANs
10,11,12 "into it". How will that matter or affect anything?
- What happens if I create new VLANs on the Dell switch and not create the same VLAN on the Cisco switch now ?? Will they be "sync'd" across to the Catalyst ??
Kindly advice.
Thanks a bunch.
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7 Posts
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September 29th, 2005 13:00
http://www.dell.com/downloads/global/products/pwcnt/en/app_note_4.pdf
Is this exactly what I should be doing ??
One question that might crop up in the future is that once I disable VTP and enable GVRP for Dell-Cisco VLAN traffic, what happens if I add another Catalyst switch to the picture. I know this is more of a Cisco question, but I would appreciate if you could answer this. Can Cisco switches use GVRP to communicate VLAN info between each other ??
Thanks.
DELL-Cuong N.
1K Posts
0
September 29th, 2005 16:00
Yes the paper you reference here describe how to setup the trunk between PowerConnect and Cisco switch. Please follow the instruction in the paper.
VLAN ID is in the ethernet frame transported between the switches. What port they are on different switches doesn't matter. VLAN is a standard and Cisco and PowerConnect follow the same standard so there should not be any interoperability issues using standard VLANs.
If you need more information on how VLAN works there are lots of tutorial and whitepaper online that could help. Additionally "The Switch Book" is a great resource.
As for your questions on Cisco. Sorry, I don't know enough to help you with these specific questions.
Cuong.
DELL-Cuong N.
1K Posts
0
September 29th, 2005 17:00
You need TFTP to download configuration file. To copy the config to another switch you have to first copy using TFTP to a host then edit the file because you can't copy all the configuration directly to another switch - for example IP address have to change before you copy to another switch otherwise you have duplicate IPs in your network. You then use TFTP again to copy the file to the other switch.
Cuong.
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7 Posts
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September 29th, 2005 17:00
One small favour. Is there a way save the config file using the web client to the local machine. I can connect to the PowerConnect using https. Is there a way to download the running-config to the local pc. When I go to the 'System' -> 'File Management', I see the options to do so, but it wants a,
'TFTP Server IP Address'
'Source File Name'
So, can it not be a non-tftp, and just a local machine from which I access the server using https ??
Lastly, can I upload a saved config file directly to another PowerConnect switch using the web client. I mean its a great thing, but I have not used http to do this before and so I asked.
Thanks.
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7 Posts
0
September 29th, 2005 18:00
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7 Posts
0
October 18th, 2005 18:00
I needed some confirmation thats all.
Lets assume that I dont want to use trunking (for whatever reasons!!). I want three VLANs from the Cisco coming to the Dell. Can I bring 3 wires from the 3 interfaces (VLANs) from the Cisco to 3 interfaces in the Dell. Create 3 VLANs on the Dell, assign them to the 3 interfaces as such.
switchport access vlan 10
switchport access vlan 20
switchport access vlan 30
Now, whenever I need to add an interface to a particular VLAN (say 10), I go to the interface and do a,
switchport access vlan 10
Is this the right way to do it ??
Again, I am simply pretending that I have three small Cisco switches that I need to connect to three small non-Cisco switches on a simple layer two connectivity.
Thanks a bunch.