02-24-2010 03:57 PM - edited 03-04-2019 07:37 AM
I wanted to know if DHCP relay is supported on the CCE 520? I believe the answer is no since that feature will require "IP Helper-Address" which requires a layer 3 switch and the CCE is layer 2 only. Basically, I want to connect IP Phones and PC's on two different VLAN's and use a DHCP server to do this.
Will this be a problem with this type of switch (layer 2) or will I require a L2 / L3 switch?
Any feedback is welcomed.
Thanks.
02-24-2010 04:50 PM
Hi John,
You would need a layer-3 device to route between for example 2 PC vlans. Do you have router? how many devices and also subnet/vlan do you have?
Also, the helper address would go on the router interface.
HTH
Reza
02-24-2010 05:12 PM
Thanks your reply. The design is that 2 VLAN's will be required per location; one for the IP phones and the other for their data.Please see below. Each location will have it's own DHCP server. Would a L3 switch still be required?
PC --- IP Phone --- Switch (Vlan 10 & 20) --- Router (802.1q trunking) ---- MPLS cloud --- Router (802.1q trunking) --- Switch (VLAN 10 & 20) --- IP Phone --- PC
02-24-2010 05:53 PM
John,
Yes, is this case the router at each location should have a helper address pointing to the local DHCP server.
Why do you have the same vlan ids on both side? is this a layer-2 VPN?
HTH
Reza
02-24-2010 07:08 PM
Thank you for the response. I will purchase additional L2 / L3 switches then for each location. The VLAN IDs were for demonstration purpose to illustrate what it looks the network looks like.
Thanks again.
John
02-25-2010 02:13 PM
You do not need additional switches for that.
The router will do just fine.
02-26-2010 06:26 AM
p.bevilacqua wrote:
You do not need additional switches for that.
The router will do just fine.
Hmmm, i'm really not sure why this was rated a 1 as it is exactly right. The routers at each site that are already there could be used to do routing on a stick between the internal switches and the internal interface of each router.
I've rated this a 5 to try and rebalance but it would be nice if whoever rated the post a 1 could explain why it was not helpful.
Jon
02-26-2010 06:37 AM
Thank you Jon.
Unfortunately it's too easy to low-rate anonimously and without a reason.
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