Inter-VLAN Routing not working correctly

[IT-SA]

Hello!

I just took over a System Administrator role for a company and trying to figure out what happened to one of their VLANs.
I am new to the Extreme Network devices. They currently have 3 stacked X450-e as their main switch stack/router.
The previous SA setup a new VLAN (VLAN11) to free up some IPs on the main subnet.
Some PCs started dropping from the network last week and we ended up figuring out that the VLAN had been removed from the switch configuration.
I readded it and tried to set everything up as it should be but its not working and I am starting to bang my head against the wall and need some other eyes on this to tell me where the issue might be.

I've gone through all the help guides on here and cannot get a PC to ping another PC on VLAN11 from VLAN1. I cannot even get VLAN11 to pass DHCP to the PC. Static set IP doesn't work either.
DHCP server IP is 192.168.0.17

Here is my current switch config:

[Eric_Burke]

There is a report from the past of someone setting intervlan routing off using SNMP SET, but I'm not sure if you're someone who might be targeted by something like that. It sets an OID which in turn turns off routing. Describing the way some stuff is going away over time - could it be malicious?

[Eric_Burke]

Only other thing I'm seeing in the configs is the application of jumbo ports on a handful of them. Usually, you'd want jumbo on all or nothing as you can get frames back that are too large for the end device to understand. Everything else really looks pretty straightforward.

[IT-SA]

Yeah, I don't get it. Very bizarre behavior.
This was all working and then I came to work last week and my coworker said certain PCs weren't working. Found out it was all VLAN11 PCs. Checked switch and everything looked good. Checked some more settings in the switch via web GUI about an hour later and the whole VLAN was gone. Just deleted. I suspected something is failing but hard to tell at this point.

[Eric_Burke]

grrr... I hate stuff like this. It's got to be something really stupid. Now I'm banging my head against the wall too!

[IT-SA]

Still nothing.

Port: 2:13
Virtual-router: VR-Default
Type: UTP
Random Early drop: Unsupported
Admin state: Enabled with auto-speed sensing auto-duplex
Link State: Active, 1Gbps, full-duplex
Link Ups: 28 Last: Tue Jul 17 19:31:06 2018
Link Downs: 27 Last: Tue Jul 17 19:31:02 2018
VLAN cfg:
Name: VLAN11, Internal Tag = 11, MAC-limit = No-limit, Virtual router: VR-Default
STP cfg:
Protocol:
Name: VLAN11 Protocol: ANY Match all protocols.
Trunking: Load sharing is not enabled.
EDP: Enabled
ELSM: Disabled
Ethernet OAM: Disabled
Learning: Enabled
Unicast Flooding: Enabled
Multicast Flooding: Enabled
Broadcast Flooding: Enabled
Jumbo: Disabled
Flow Control: Rx-Pause: Enabled Tx-Pause: Disabled
Priority Flow Control: Disabled
Reflective Relay: Disabled
Link up/down SNMP trap filter setting: Enabled
Egress Port Rate: No-limit
Broadcast Rate: No-limit
Multicast Rate: No-limit
Unknown Dest Mac Rate: No-limit
QoS Profile: None configured
Ingress Rate Shaping : Unsupported
Ingress IPTOS Examination: Disabled
Ingress 802.1p Examination: Enabled
Ingress 802.1p Inner Exam: Disabled
Egress IPTOS Replacement: Disabled
Egress 802.1p Replacement: Disabled
NetLogin: Disabled
NetLogin port mode: Port based VLANs
Smart redundancy: Enabled
Software redundant port: Disabled
IPFIX: Disabled Metering: Ingress, All Packets, All Traffic
IPv4 Flow Key Mask: SIP: 255.255.255.255 DIP: 255.255.255.255
IPv6 Flow Key Mask: SIP: ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff
DIP: ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff
auto-polarity: Enabled
Shared packet buffer: default
VMAN CEP egress filtering: Disabled
PTP Configured: Disabled
Time-Stamping Mode: None