Cisco 3750 trunk to Extreme 450

I am trunking a Cisco WS-C3750X-48T-L   to an Extreme 450 and when I plug into the port I'm unable to pull an address from the DHCP server on the extreme side.

Below is the 3750 config;

interface Port-channel7

 description Etherchannel Trunks to Extreme Switch

 switchport trunk encapsulation dot1q

 switchport trunk native vlan 998

 switchport trunk allowed vlan 998,999

 switchport mode trunk

end

!

interface GigabitEthernet1/0/21

 description temp connection to extreme core

 switchport trunk encapsulation dot1q

 switchport trunk native vlan 998

 switchport trunk allowed vlan 998,999

 switchport mode trunk

 channel-group 7 mode active

end

!

interface GigabitEthernet1/0/23

 description temp connection to extreme core

 switchport trunk encapsulation dot1q

 switchport trunk native vlan 998

 switchport trunk allowed vlan 998,999

 switchport mode trunk

 channel-group 7 mode active

end

!

interface GigabitEthernet2/0/15

 description temp connx to Vlan 998

 switchport WS-C3750X-48T-S   access vlan 998

 switchport mode access

 spanning-tree portfast

 spanning-tree bpduguard enable

Yes, that is correct.