Switch DHCP for Avaya Phone

[broow]

for the life of me i can not get a consistent result for our remote site switches to handout DHCP addresses for our Avaya 9611 phones.  I have a new location that will not work.  the switch is a   WS-C2960S-48FPD-L, 15.2(2)E5.  Switch settings are:

ip dhcp excluded-address 172.16.2.65 172.16.2.90
!
ip dhcp pool vlan306
network 172.16.2.64 255.255.255.192
default-router 172.16.2.65
option 242 "MCIPADD=172.20.106.140,MCPORT=1719,HTTPSRVR=172.20.101.207,VLANTEST=0,L2Q=1,L2QVLAN=306"

lldp run

interface GigabitEthernet1/0/11
switchport access vlan 136
switchport voice vlan 306
mls qos trust dscp
no cdp enable
spanning-tree portfast

other remote sites work.  i seem to have to fight each location to get to work.  This one is the exception.

any ideas?

thanks

[pieterh]

as you configure the scope on the switch I'm missing something like

  interface vlan 306

        ip address 172.16.2.65 255.255.255.192 

if the dhcp server is another device, than you don't need this scope on the switch

[broow · Accepted solution]

for the IP phones at remote sites, we had been statically assigning the ip addresses.  Now we want to use DHCP to preform this task.  The layer 3/routing for this subnet is at the Core with DHCP being defined for this subnet at the switch.

thanks

[paul driver]

Hello

So to confirm the switch at this site is l3 switch and running its own dhcp service, and these voip devices are local to that site?

[broow]

WS-C2960S-48FPD-L is a layer two switch that can do DHCP services.

the phones are local to this switch.

BMI_2960S(config)#service ?
dhcp                                             Enable DHCP server and relay agent

Thanks,

[pieterh]

ip repeat: does the switch has an ip-address in the voice vlan?

if not, it will not issue ip addresses to connected devices.

[paul driver · Accepted solution]

Hello

As stated by pieterh , If the switch is ruining dhcp then it require a L3 ip address for those users on that scope it is servicing.

So if you have a switch running as a host, ( no ip routing and just SVI mgt address)  then even if you have dhcp enabled on that switch any host attached to it will not receive a reply to their dhcp requests.