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DHCP Issue with Mobile Devices

kurtsalvador1
Level 1
Level 1

Hi,
The situation is I have an SG500-28 configured as L3 with multiple VLANS and their respective DHCP servers enabled. However, mobile devices particularly mobile phones cannot connect to the network via WiFi. Laptops have no issue connecting via Wifi. More than enough IP addresses have been allocated so there should be no problem there. The running config is shown below. Any help is appreciated. Thanks

core#show running-config

config-file-header

core

v1.3.7.18 / R750_NIK_1_35_647_358

CLI v1.0

set system mode router queues-mode 4 

 

file SSD indicator encrypted

@

ssd-control-start

ssd config

ssd file passphrase control unrestricted

no ssd file integrity control

ssd-control-end cb0a3fdb1f3a1af4e4430033719968c0

!

vlan database

default-vlan vlan 900

exit

vlan database

vlan 1,170,180,200,210

exit

voice vlan oui-table add 0001e3 Siemens_AG_phone________

voice vlan oui-table add 00036b Cisco_phone_____________

voice vlan oui-table add 00096e Avaya___________________

voice vlan oui-table add 000fe2 H3C_Aolynk______________

voice vlan oui-table add 0060b9 Philips_and_NEC_AG_phone

voice vlan oui-table add 00d01e Pingtel_phone___________

voice vlan oui-table add 00e075 Polycom/Veritel_phone___

voice vlan oui-table add 00e0bb 3Com_phone______________

no eee enable

ip dhcp server

ip dhcp pool network VLAN 200

address low 172.16.20.51 high 172.16.20.254 255.255.255.0

default-router 172.16.20.1

dns-server 172.16.20.2 172.16.17.254

exit

ip dhcp pool network Segment02

address low 172.16.21.21 high 172.16.21.241 255.255.255.0

default-router 172.16.21.1

dns-server 172.16.20.2 172.16.17.254

exit

ip dhcp pool network Management Group

address low 172.16.17.53 high 172.16.17.62 255.255.255.224

lease infinite                                        

default-router 172.16.17.34

dns-server 172.16.17.254

exit

ip dhcp information option

bonjour interface range vlan 1

hostname core

username cisco password encrypted 3750989f9f6b9a4e8389eb9eb51b289aee14e2d8 privilege 15

clock timezone " " 0 minutes 0

ip name-server  172.16.17.254

ip telnet server

!

interface vlan 1

 no ip address dhcp

!

interface vlan 170

 name Servers

 ip address 172.16.17.1 255.255.255.240

!

interface vlan 180

 name ComputerLab

 ip address 172.16.18.1 255.255.255.128               

!

interface vlan 200

 name Segment01

 ip address 172.16.20.1 255.255.255.0

!

interface vlan 210

 name Segment02

 ip address 172.16.21.1 255.255.255.0

!

interface vlan 900

 ip address 172.16.17.34 255.255.255.224

!

interface gigabitethernet1/1/1

 storm-control broadcast enable

 switchport mode access

 switchport access vlan 200

!

interface gigabitethernet1/1/2

 storm-control broadcast enable

 switchport mode access

 switchport access vlan 200

!                                                     

interface gigabitethernet1/1/3

 storm-control broadcast enable

 switchport mode access

 switchport access vlan 200

!

interface gigabitethernet1/1/4

 storm-control broadcast enable

 switchport mode access

 switchport access vlan 200

!

interface gigabitethernet1/1/5

 storm-control broadcast enable

 switchport mode access

 switchport access vlan 200

!

interface gigabitethernet1/1/6

 storm-control broadcast enable

 switchport mode access

 switchport access vlan 200

!

interface gigabitethernet1/1/7

 storm-control broadcast enable                       

 switchport mode access

 switchport access vlan 200

!

interface gigabitethernet1/1/8

 storm-control broadcast enable

 switchport mode access

 switchport access vlan 200

!

interface gigabitethernet1/1/9

 storm-control broadcast enable

 switchport mode access

 switchport access vlan 200

!

interface gigabitethernet1/1/10

 storm-control broadcast enable

 switchport mode access

!

interface gigabitethernet1/1/11

 storm-control broadcast enable

 switchport mode access

 switchport access vlan 200

!                                                     

interface gigabitethernet1/1/12

 storm-control broadcast enable

 switchport mode access

 switchport access vlan 200

!

interface gigabitethernet1/1/13

 storm-control broadcast enable

 switchport mode access

 switchport access vlan 170

!

interface gigabitethernet1/1/14

 storm-control broadcast enable

 switchport mode access

 switchport access vlan 170

!

interface gigabitethernet1/1/15

 storm-control broadcast enable

 switchport mode access

 switchport access vlan 200

!

interface gigabitethernet1/1/16

 storm-control broadcast enable                       

 switchport mode access

 switchport access vlan 200

!

interface gigabitethernet1/1/17

 storm-control broadcast enable

 switchport mode access

 switchport access vlan 200

!

interface gigabitethernet1/1/18

 storm-control broadcast enable

 switchport mode access

 switchport access vlan 200

!

interface gigabitethernet1/1/19

 storm-control broadcast enable

 switchport mode access

 switchport access vlan 200

!

interface gigabitethernet1/1/20

 storm-control broadcast enable

 switchport mode access

 switchport access vlan 200                           

!

interface gigabitethernet1/1/21

 storm-control broadcast enable

 switchport mode access

 switchport access vlan 200

!

interface gigabitethernet1/1/22

 storm-control broadcast enable

 switchport mode access

 switchport access vlan 210

!

interface gigabitethernet1/1/23

 channel-group 1 mode auto

!

interface gigabitethernet1/1/24

 channel-group 1 mode auto

!

interface gigabitethernet1/1/25

 storm-control broadcast enable

 switchport trunk allowed vlan add 200

!

interface gigabitethernet1/1/26                       

 storm-control broadcast enable

 switchport trunk allowed vlan add 200

!

interface Port-channel1

 description "To Internet"

 ip address 172.16.17.253 255.255.255.252

!

exit

3 Replies 3

Mark Malone
VIP Alumni
VIP Alumni

To rule out the wifi have you tried giving the devices a static ip , do they work then ?

If they do and its still looking like dhcp do these switches allow you to run debug dhcp detail and then try and connect again see what the logs show

Hi Mark,

Thanks for the suggestion. Assigning static IPs on some devices works but not on all.

having gone through the logs, i see similar lines like:

20-Jul-2015 08:01:05 :%DHCP-W-DECLINE: DHCP Decline was received for IP address 172.16.20.81

20-Jul-2015 07:57:37 :%DHCP-W-DECLINE: DHCP Decline was received for IP address 172.16.20.77

 20-Jul-2015 07:57:03 :%DHCP-W-DECLINE: DHCP Decline was received for IP address 172.16.20.74

any idea as to whats going on?

Hi,

I upgraded to firmware 1.4.1.3 and all seems to be fine now.

Thanks 

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