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Configuration advice with PowerConnect 8132F and existing Cisco 2851

Posted on 2014-01-17
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Last Modified: 2016-11-23
Current environment:
We currently have all layer 2 switches with a Cisco 2851 handling the routing.
We have a data VLAN 1 (192.168.1.0/24) and a voice VLAN 2 (192.168.100.0/24).
GE0/0 on the Cisco has IP 192.168.1.1 and GE0/1 on the Cisco has IP 192.168.100.1; both interfaces connect directly to our access switches.

New environment:
While the Cisco 2851 will remain in place, all switches will be replaced with two Dell PowerConnect 8132F's (stacked) and a series of Dell PowerConnect 5548P's.
The 5548P's will connect back to the 8132F's via two aggregated 10Gb fiber linkes (riding OM3 fiber).
I would like to introduce a new "infrastructure" VLAN for the switches to reside on for management purposes with network 192.168.50.0/24.

I am more experienced with software development and am a bit confused on the best approach for routing now that I am introducing layer 3 switches into the mix.

Any advise is appreciated.
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Question by:swoods79
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by:Soulja
Soulja earned 500 total points
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Okay so here is what you want to do:

- On the new L3 Dell Stack create new vlans 50 (Management), Vlan 100 (Voice) and Vlan 200 (Data). The reason I changed Data is because I know some Dell switches don't like to route the default vlan 1, so not sure yours will.
- Leave the 192.168.1.1 on the Cisco Router. Disconnect and remove the 100.1 and move this ip to the Dell switch for VLAN interface 100.
- Create a VLAN interface 50 with 192.168.50.1/24
- Create VLAN interface 200 for Data and assign ip 192.168.1.2/24
- On the router create static routes:

ip route 192.168.100.0 255.255.255.0 192.168.1.2
ip route 192.168.50.0 255.255.255.0 192.168.1.2

-The uplink from the Dell stack to the router will just be an access port in vlan 200.
- Add a default route on the dell stack to point to the cisco router

ip route 0.0.0.0 0.0.0.0 192.168.1.1

- Make sure you new vlans are trunked to your 5548s
- Make sure to create and interface vlan 50 on the 5548's and assign an ip from that vlan. Disable vlan 1 interface.
- Make sure the 5548 have a default gateway configured to point to the 192.168.50.1.

- Change all port previously assigned to vlan 1 to vlan 200.
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by:swoods79
ID: 39789084
Based on this recommendation, all desktops would then have a default gateway of 192.168.1.2 correct?  They current have a default gateway of 192.168.1.1.
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Soulja earned 500 total points
ID: 39789276
Yes, that is correct. If you have a dhcp server, just change the assigned gateway ip address. Also, remember to us dhcp relay/forwarding for the other vlans.

The other option is the move the 192.168.1.1 address to the vlan 200 interface on the dell switch and just change the ip on the router to 1.2. Whichever you prefer.
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by:Soulja
ID: 39794544
Any update?
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Author Closing Comment

by:swoods79
ID: 39794564
Thank you for your help.  I will be implementing this solution over the weekend.
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by:Soulja
ID: 39794568
Cool, keep this post updated to let me know the outcome. :)
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Author Comment

by:swoods79
ID: 39794575
Will do.  I also came to the realization that these switches (and our Mitel phones) support LLDP-MED so that will be a nice enhancement.
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by:Soulja
ID: 39794681
Great. That is nice to have.
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