DHCP-Relay on 4548GT-PWR switch

[tomtom9]

Hi guys,

I am trying to use the 4548GT-PWR in one of our sites to connect to IP Office Server Edition. My configuration:
VLAN1 / Agent: IP 10.10.10.10
IPO Server: IP 10.10.20.10
Default route: 0.0.0.0 0.0.0.0 10.10.10.1

I can ping the server from the switch but the phone just sits at looking for DHCP.

I have then tried to create another lan - VLAN10 without assigning it with IP since the 10.10.10.X/24 subnet is the one directly connected/routed to this switch. Assigned ports to it, enabled voice but DHCP is still not forwarding the requests.

Any ideas what I am doing wrong? Any settings that I am missing?

Thanks.

Tom

 

[intrigrant]

How about IP helper in the Voice VLAN?

 

[biv343]

DHCP relay is enabled on the VLAN, then there is a separate table that lists the interface listener address and where to forward the request. The example below should get you close, just change VLAN IDs as needed. The syntax may be a bit off as it was from a 55XX series switch, but the commands should be very close in a 4548.

It's also easy to do in the web GUI if you have that enabled.

interface vlan 20
ip address 10.10.20.1 255.255.255.0 3
ip routing
ip dhcp-relay min-sec 0 mode bootp_dhcp
no ip dhcp-relay broadcast
ip dhcp-relay
exit

ip dhcp-relay
ip dhcp-relay fwd-path 10.10.20.1 10.10.10.10 enable
ip dhcp-relay fwd-path 10.10.20.1 10.10.10.10 mode bootp-dhcp

 

[tomtom9]

Thanks guys. On the GUI I cannot edit much so I am using telnet.

Now,

interface vlan 20
ip address 10.10.20.1 255.255.255.0 3 This is the same subnet as in remote site where the IPO server resides. Do I need to allow traffic from this VLAN on the server side?
ip routing
ip dhcp-relay min-sec 0 mode bootp_dhcp
no ip dhcp-relay broadcast
ip dhcp-relay
exit

ip dhcp-relay
ip dhcp-relay fwd-path 10.10.20.1 10.10.10.10 enable If I do it that way I get:
% Cannot modify settings
% Error invalid server ip address
I guess this should be:
ip dhcp-relay fwd-path 10.10.20.1 10.10.20.10
But when doing so I can no longer ping the server.

ip dhcp-relay fwd-path 10.10.20.1 10.10.10.10 mode bootp-dhcp