04-07-2014 07:38 AM - edited 03-07-2019 07:00 PM
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
04-07-2014 08:47 AM
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/
04-07-2014 08:52 AM
Thanks
it is wired
04-07-2014 08:46 PM
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
04-07-2014 11:09 PM
04-08-2014 12:58 AM
Hello
Can you post the config of the switches that supply DHCP?
res
Paul
04-08-2014 03:05 AM
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
!
04-08-2014 05:10 AM
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
04-08-2014 05:46 AM
Hi
The server is offering the dhcp service not the switch .
Thanks
04-08-2014 06:18 AM
Then Go ahead with my approach:
interface Vlan58
standby 58 HSRP1
ip helper-address 192.168.8.11 redundancy HSRP1
Regards,
04-13-2014 01:48 AM
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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