Replacing 3COM 4500 switches with SG300-52 - help

I'm replacing 2 3COM 4500 Swithes with the SG300-52 Cisco switch. We have 3 VLANs, 10, 20, 100. The switch is set for Layer 3 and I have setup DHCP relay. I was hoping someone might know what settings i should set on the Cisco for the following setups:
3COM Setup
interface GigabitEthernet1/0/1
port link-type hybrid
port hybrid vlan 10 tagged
port hybrid vlan 1 20 100 untagged
port hybrid pvid vlan 100
My Cisco Translation
interface gigabitethernet1
switchport mode general
switchport general allowed vlan add 10 tagged
switchport general allowed vlan add 20,100 untagged
switchport general pvid 100
exit
and one other example i'm curious if i set right..
3COM Setup
interface GigabitEthernet1/0/48
port link-type trunk
port trunk permit vlan all
port trunk pvid vlan 100
My Cisco Translation
interface gigabitethernet51
switchport trunk allowed vlan add 10,20
switchport trunk native vlan 100
exit
Trying these settings I am not able to get any devices to work on the switch so i'm guessing i have something not setup correctly. Any help would be greatly appreciated..
THanks,
Chris

Chris,
Compared to your 3com switches yes the commands you currently ran are comparable. The reason it’s not working is a bigger question and we need a complete picture. First we need a topology(detailed as possible) of your network and details on how things need to work/setup? Then we can set up accordingly to the devices on your network. For quicker resolution call into the SBSC @ 1-866-606-18666 and open a support case .
Thanks,
Jasbryan

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Edited by: SuMMerMaN on Mar 10, 2010 12:14 PM
Edited by: SuMMerMaN on Mar 10, 2010 12:14 PM

SuMMerMaN wrote:
Well,it says;
possible loss of precision
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required:int
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hi
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