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DHCP Issue

DHCP Issue

DHCP Issue

Hi guys !
I am facing a problem and I am a kid on Networking.
I have a small network using Summit x250. There is no routers on that.
I have configured two subnets ( and and 2 VLANs, to voice and data.
My DHCP is on data subnet (
My Call Server is on voice subnet (
The issue is that, my phones don't are receiving IP address from DHCP, but the PC are receiving with no problem.

Note: the Call server is on switch and DHCP is on another one on network. There is a uplink between Call Server switch and DHCP swithch.

242 option was configured on DHCP server, as follows:
Data scope

Voice scope

The configuration on Call server switch is:
Data Valan tag 30
Voice Vlan tag 40
ip forward enabled on both

show iproute
Ori Destination Gateway Mtr Flags VLAN Duration
#d 1 U------um--f corporativa 5d:16h:35m:10s
#d 1 U------um--f Hardphone_A 5d:16h:35m:10s

The configuration on DHCP switch is:
Same VLANs
ip forward enabled on both

shoW iproute
Ori Destination Gateway Mtr Flags VLAN Duration
#s Default Route 1 UG---S-um--f corporativa 5d:16h:37m:19s
#d 1 U------um--f corporativa 5d:16h:37m:35s
#d 1 U------um--f Hardphone_A 5d:16h:37m:35s

Call Server port is DATA tagged and voice untagged
DHCP port, on another switch, is VOICE tagged and data untagged.

Any ideas about phone is not receiving IP address ?

Thanks in advance !


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