DHCP SERVER Problem

[wasiimcisco]

I have configured DHCP server on cisco catalyst 3750. But now I am having problem with the IP address assignment.

I have exclude the first 70 IP addresses

and Last 5 addresses.

But now when clients wants to get the IP i got the error that

CO-DATA_POOL is empty.

Though i have 175 Ip address in POOL. Hardly 80 clients are connected, but still i m having problem. Few times I am getting gratuitous ARP and Ip address conflit.

sometimes new machines are fail to get IP address, i have to assign them manual IP address then it starts working.

ip dhcp excluded-address 172.28.92.251 172.28.92.255

ip dhcp excluded-address 172.28.93.251 172.28.93.255

ip dhcp excluded-address 172.28.86.251 172.28.86.255

ip dhcp excluded-address 172.28.87.251 172.28.87.255

ip dhcp excluded-address 172.28.79.251 172.28.79.255

ip dhcp excluded-address 172.28.78.251 172.28.78.255

ip dhcp excluded-address 172.28.93.1 172.28.93.70

ip dhcp excluded-address 172.28.92.1 172.28.92.70

ip dhcp excluded-address 172.28.86.1 172.28.86.70

ip dhcp excluded-address 172.28.87.1 172.28.87.70

ip dhcp excluded-address 172.28.79.1 172.28.79.70

ip dhcp excluded-address 172.28.78.1 172.28.78.70

!

ip dhcp pool CO_DATA

network 172.28.92.0 255.255.255.0

default-router 172.28.92.254

dns-server 172.28.32.11

domain-name waridtel.cg

lease 8 23 59

!

ip dhcp pool CO_VOICE

network 172.28.93.0 255.255.255.0

default-router 172.28.93.254

option 150 ip 172.28.80.10

dns-server 172.28.32.11

[gauravshar]

Kindly make sure, you have configured your trunks perfectly. Moreover, is 'ip routing' enabled on your 3750 switch or on the switch which is actually doing inter-vlan routing if you have different data/voice-vlans.

Kindly post 'show run' output of the 3750 switch.

--gaurav

[wasiimcisco]

Thanks for the reply, IP routing is already enable and trunk configuration is also fine. Anyway i am sending you my switch confgiration please see and tell me why this is happening.

[royalblues]

Try configuring portfast on the ports connecting to desktops

Also are you sure you are not running into problem due to DHCP lease time?

Narayan

[wasiimcisco]

All the ports already in portfast. I not getting any lease message. problem only arise when new clients add in my network and clients with static IP shift to dynmaic IP. But when I assign new clients static Ip they works fine. At that time i got error of DHCP POOL has no IP address and stuff like that.

BZV-TD-EDN3750-01#sh ip dhcp conflict

IP address Detection method Detection time

172.28.92.102 Ping Feb 11 2008 05:11 PM

172.28.92.148 Ping Feb 11 2008 05:47 PM

172.28.92.180 Ping Feb 11 2008 10:13 PM

172.28.92.241 Ping Feb 11 2008 10:18 PM

172.28.92.175 Gratuitous ARP Feb 12 2008 11:28 AM

1w0d: DHCPD: DHCPDISCOVER received from client 0100.166f.6a18.55 on interface Vlan100.

1w0d: DHCPD: address pool CO_DATA is empty.

1w0d: DHCPD: DHCPDISCOVER received from client 0100.166f.6a18.55 on interface Vlan100.

1w0d: DHCPD: address pool CO_DATA is empty.q

I have attached the configuration please review it.