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New Member

Device not getting ip adddress

 

Some particular devices ( android os ) is not getting ip address from  dhcp server. But windows clients are getting the ip address. 

How can i troubleshoot this issue , anything need to be done on the access ports 

10 REPLIES

I'm assuming wireless right

I'm assuming wireless right?

Which model of Access point are you using?

Please also check the Frequency your AP is using and if the Android devices supports it.

 

http://glassonionblog.wordpress.com/2008/08/04/wireless-protocols-ieee-80211-a-b-g-n-compared/

New Member

Thanks  it is wired 

Thanks 

 

it is wired 

Hello, What kind of device is

Hello,

 

What kind of device is the server?

 

If a Cisco router run

debug ip dhcp packet

 

If it's not a network device per se but a dedicated server then captures are your way to go

-Run wireshark at the client level

If that does not provide the answer use a SPAN session at the switch level

 

Regards

 

Jcarvaja

Looking for some Networking Assistance? Contact me directly at jcarvaja@laguiadelnetworking.com I will fix your problem ASAP. Cheers, Julio Carvajal Segura http://laguiadelnetworking.com
New Member

the wireshark trace file

the wireshark trace file attached ,

 

I dont understand why  vlan interface from both switches (hsrp )  has to  'offer  DHCP '

 

it is an issue or normal 

HelloCan you post the config

Hello

Can you post the config of the switches that supply DHCP?

 

res

Paul

Please don't forget to rate any posts that have been helpful. Thanks.
New Member

Hi paul here is the  vlan

Hi paul here is the  vlan configuration  

192.168.8.11 is windows dhcp server

interface Vlan58
 ip address 10.0.58.2 255.255.255.0
 ip helper-address 192.168.8.11
 standby 58 ip 10.0.58.1
 standby 58 priority 200
 standby 58 preempt
!


interface Vlan58
 ip address 10.0.58.2 255.255.255.0
 ip helper-address 192.168.8.11
 standby 58 ip 10.0.58.1
 standby 58 priority 200
 standby 58 preempt
!

Hello, So I can see you have

Hello,

 

So I can see you have a DHCP server at 192.168.8.11, is that the DHCP Server we are using?

For that please add on both devices:

interface Vlan58

standby 58 HSRP1

 ip helper-address 192.168.8.11 redundancy  HSRP1

 

Now if the switch is the DHCP server, make sure you split the DHCP pools on each box as they do not share the DHCP binding table, you do not want to be providing the same IP addresses on both routers,

 

Does it make sense?

 

Please let us know whether the switch is the one that should give it or that other server?

 

Regards

Looking for some Networking Assistance? Contact me directly at jcarvaja@laguiadelnetworking.com I will fix your problem ASAP. Cheers, Julio Carvajal Segura http://laguiadelnetworking.com
New Member

Hi The server is offering

Hi 

The server is offering  the dhcp service not the switch .

 

Thanks 

Then Go ahead with my

Then Go ahead with my approach:

 

interface Vlan58

standby 58 HSRP1

 ip helper-address 192.168.8.11 redundancy  HSRP1

 

Regards,

Looking for some Networking Assistance? Contact me directly at jcarvaja@laguiadelnetworking.com I will fix your problem ASAP. Cheers, Julio Carvajal Segura http://laguiadelnetworking.com
New Member

Hi julio  Thanks for your

Hi julio 

 

Thanks for your great suggestion . I want to add something before i change . 

The thing is  if the device got ip address from dhcp  after few hours ,lets  say the switch went down for short period of time . In this case  all the devices should retain the ip addresses ?

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