Cisco & Arista VLAN / Config help

TL;DR: Host's don't communicate at 10gb speed when on the same vlan & connected to 10gb switch. Arista has to be set to dot1q-tunnel for cisco vlans to work.

Forgive my basic level of networking - still learning, but i'm having problems with my lab's switch setup. As my L3 switch i've got a 3750E, my vlans are defined here and shared to a second 3750E in my primary rack (via VTP). This 3750E is connected to an Arista 7050QX-32 which provides 10gb (and some 40gb) uplinks to my servers. My upstream router is a Ubiquiti edge router.

Problems:

• Hosts don't seem to be able to talk to each other at anything more than 1gb speeds when on the same vlan (verified using iperf3). I would assume that as the traffic doesn't need to be routed out of it's subnet (by the L3 3750E) it should 'stay within the arista' at it's native speed?
• The Arista has to be configured with the ports as 'dot1q-tunnel', from my limited knowledge this is wrong? When setting them to 'switchport mode tunnel' my hosts are unable to access my lans.

I've checked the network & interface assignments in ESXI and that is all correct, so i'm at a loss as to why I can't get more than a 1gb speed.

Any help would be greatly appreciated.

Here are the configs for each switch (trimmed so i don't take up your entire screen):

Core L3: (i'm aware a few vlans are missing ip addresses, but that shouldn't cause my issue.. should it?!)

version 15.0 switch 2 provision ws-c3750e-24td system mtu routing 1500 ip routing ! ! ip domain-name a.domain.com cluster enable name-here 0 ! license boot level ipservices spanning-tree mode pvst spanning-tree extend system-id ! vlan internal allocation policy ascending ! interface FastEthernet0 no ip address no ip route-cache shutdown ! interface GigabitEthernet2/0/1 switchport trunk encapsulation dot1q switchport mode trunk ! interface TenGigabitEthernet2/0/1 switchport trunk encapsulation dot1q switchport mode trunk ! interface Vlan1 ip address 10.11.0.2 255.255.255.0 ! interface Vlan22 ip address 10.22.0.2 255.255.255.0 ! interface Vlan24 no ip address ! interface Vlan32 ip address 10.32.0.2 255.255.255.0 ! interface Vlan33 ip address 10.33.0.2 255.255.255.0 ! interface Vlan34 description Lab no ip address ! interface Vlan35 description ASA_BUILD no ip address ! interface Vlan36 ip address 10.36.0.2 255.255.255.0 ! interface Vlan44 ip address 10.44.0.2 255.255.255.0 ! interface Vlan55 ip address 10.55.0.2 255.255.255.0 ! interface Vlan56 ip address 10.56.0.2 255.255.255.0 ! interface Vlan66 ip address 10.66.0.2 255.255.255.0 ! interface Vlan77 ip address 10.77.0.2 255.255.255.0 ! interface Vlan88 ip address 10.88.0.2 255.255.255.0 ! interface Vlan99 ip address 10.99.0.2 255.255.255.0 ! ip default-gateway 10.11.0.1 ! ip http server ip http secure-server ! ip route 0.0.0.0 0.0.0.0 10.11.0.1 

Rack 3750E:

version 12.2 ! switch 3 provision ws-c3750e-48td system mtu routing 1500 ip subnet-zero ! spanning-tree mode pvst spanning-tree etherchannel guard misconfig spanning-tree extend system-id ! vlan internal allocation policy ascending ! ! ! interface FastEthernet0 no ip address shutdown ! interface GigabitEthernet3/0/1 switchport trunk encapsulation dot1q switchport mode trunk ! interface GigabitEthernet3/0/14 switchport access vlan 66 ! interface TenGigabitEthernet3/0/1 switchport trunk encapsulation dot1q switchport mode trunk ! interface Vlan1 ip address 10.11.0.3 255.255.255.0 ! 

Arista:

! device: rack-40gb (DCS-7050QX-32, EOS-4.18.5M) ! ! boot system flash:/EOS-4.18.5M.swi ! transceiver qsfp default-mode 4x10G ! hostname rack-40gb ip name-server vrf default 10.88.0.10 ip name-server vrf default 10.88.0.11 ! spanning-tree mode mstp ! no aaa root ! environment fan-speed override 50 ! clock timezone Europe/London ! vlan 1 name Native ! vlan 22 name vlan-22 ! vlan 32 name vlan-32 ! vlan 33 name UserLand ! vlan 34 name Lab ! vlan 35 name ASA_BUILD ! vlan 36 name vlan-36 ! vlan 44 name vlan-44 ! vlan 55 name Storage ! vlan 56 name Storage-SAN ! vlan 66 name OOB-Management ! vlan 77 name vlan-77 ! vlan 88 name vlan-88 trunk group 88 ! vlan 99 name vlan-99 ! interface Ethernet1/1 switchport trunk allowed vlan 1-100 switchport mode dot1q-tunnel switchport trunk group 88 ! interface Ethernet25 speed forced 40gfull switchport trunk allowed vlan 1-100 switchport mode dot1q-tunnel ! interface Management1 ip address 10.11.0.4/24 ! ip route 0.0.0.0/0 10.11.0.1 ! no ip routing ! end