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Switching and Routing issues

Real - time secnario

Problem - a cisco 3750 stack is connected to 6509-E core swtich. Data Vlan and Voice Vlan is configured on both the switches. physical connections  are connected from switch ----> Nortel IP phone ----> PC.

issue - the Voice vlan is configured with 10.10.20.0/24 and DHCP is enabled. some of the IP addres from the subnet are notworking.

example - 10.10.20.1 - working fine

               10.10.20.2 - working fine

               10.10.20.3 - is not working.  take it as a random number

               10.10.20.4 , 10.10.20.77, 10.10.20.106, 10.10.20.30 not working ......

               if i change the phone with the same IP address not working ,,,, i tried on each and every port on the 3750 swtich ... still these ip address are not working.

i did check the Mac Address.. they seems to be fine. i tested them from the core. checked all ARP and mac address table. i can see the correct mac address to the revelent ip address.

could any one suggest a troubleshooting secnario to test the IP address ... and solve this problem

 

cheers

Raju

 

 

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1 REPLY

Please post the config of

Please post the config of both the 3750 and 6509.

 

Thanks,

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