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ERS 3500 - no dhcp to clients

ERS 3500 - no dhcp to clients

(OP)
Hi guys,

I am having problems doing some of the basic tasks in networking, and I don't know if my ERS3510 (Ethernet Routing Switch 3510GT HW:02 FW:5.3.0.6 SW:v5.3.3.014 BN:14 (c) Avaya Networks) is broken or I am doing something wrong here..

So here's the deal.

I want to program ERS to have on Port 1 - direct internet link (so direct ip from provider), and the other ports I want to have a local network (like seting un a basic tplink router). So for this I know I have to create 2 Vlans... 1 for port 1 and 2nd for the other ports. I enable ip routing, I set up vlan ips for each vlan and I enable dhcp server for the 2nd vlan. now here is where i'm stuck, i don't get IPs from dhcp for the second vlan..
But when I create dhcp pool for the management vlan then I get IP from dhcp server.. .

I am not an expert in networking but ther's something fishy here.. Anyway, if you can help, please tell me what info do you need from me to figure out what's wrong :)

Thank you,
All the best!

PS: I hope I am posting this in the right place bigsmile

RE: ERS 3500 - no dhcp to clients

Can you post The vlan, ip, and dhcp config and a "show ip dhcp-server pool"

RE: ERS 3500 - no dhcp to clients

(OP)
Hi,

Sorry for the delayed response. I don't have my hands all the time on this ERS :)

So I have managed, somehow to make the dhcp pool work.. i did the same steps as i did before so that's strange..

Anyway, now I am stuck at another problem.

So I have Vlan 1 - management vlan. Vlan 20 - port 8 - dhcp pool 192.168.3.100->120 with IP 192.168.3.1 and Vlan 40 that i have created for the link with the public internet from the provider. I have set up IP 92.87.95.53 and created a static route 0.0.0.0 0.0.0.0 92.87.95.49. Problem is I don't have internet for dhcp clients.. is there something else I need to do? this looks like a routing problem :-? because from 192.168.3.0 i can ping into 92.87.95.53 but not to .49
The gateway 92.87.95.49 is an equipment in our rack and not at the ISP..

I have attached a putty session with ERS3510 . I have printed "show tech" so I think you will have there all the info.

RE: ERS 3500 - no dhcp to clients

The public IPs don't know the route into your internal network. You need a NAT device in between!

You should never ever link your internal network directly to the internet besides you want to be hacked in less than one hour!

RE: ERS 3500 - no dhcp to clients


Your router with 92.87.95.49 address needs to NAT the public IP to a private address.
You need something like below. Private addresses cannot be on the public internet because internet routers will not route private addresses.

Router (NAT)
Public: 92.87.95.49 (to ISP router)
Private: 192.168.4.1 (to switch vlan40)

Switch
192.168.4.2 (vlan40)
Static: 0.0.0.0/0.0.0.0 192.168.4.1


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