3Com 4800 Can't ping vlan interface

[ollyxyz]

Hi Chaps,

                this may be a simple problem.

I've configured a 3com 4800-24 port switch as core switch in a small network.

Have configured up multiple vlans and interfaces

Vlan 1 int 172.16.0.254/16  

Vlan 10 int 172.16.10.254/24

vlan 11 int 172.16.11.254/24 etc

All devices are presenly on vlan 1 with 172.16.x.x address ranges and /16 mask. They communicate fine and can ping the

vlan 1 interface ok.

Ive configured up two workstations on vlan 10 with 172.16.10.2 and 172.16.10.3 addresses (mask /24)and connected them

into two ports on this switch configured as access ports for vlan 10. They cannot ping each other or the gateway ip address.

When i connect the workstations into a dumb switch they ping each other just fine.

This is part of a larger problem im having whereas I cannot get DHCP relay agent to work between dhcp server on vlan 1 and hosts on vlan 201 (vlan int for vlan 201 is 172.17.3.254) Switch can ping dhcp server ok but not a host on vlan 201 if i put a static address on host.

[TJtheone]

Please share the config file and the diagram

[ISoliman]

Vlan 1 int 172.16.0.254/16  

Vlan 10 int 172.16.10.254/24

vlan 11 int 172.16.11.254/24 etc

these subnets overlap, vlan 1 /16 subnets includes vlan 10 and vlan 11 ranges, just as a test configure vlan 10 with ip 10.1.1.1/24 and give your client and ip from the same range and test the ping to vlan 1 and see.

[TJtheone]

Change the Vlan 1 int 172.16.0.254/16  to /24 and try