Blocking state happens when it detects a loop in the network and blocks traffic to stop the loop.
I have two N1500 series switches,  one is 24 port and the second is 48 port I have a couple VLANs configured on the switches. They have been able to talk through the VLAN 215 on my switches.  I recently tried to add VLANs 36, and 236 to make so that I could send traffic through them, but I can't send traffic back and forth on the new VLANs. Can anyone give some advice to help what all do you want to see to better understand  Vlan 215SW1      int-sw1#show interfaces switchport gi1/0/25      Port: Gi1/0/25     VLAN Membership Mode: Access Mode     Access Mode VLAN: 215     General Mode PVID: 1 (default)     General Mode Ingress Filtering: Enabled     General Mode Acceptable Frame Type: Admit All     General Mode Dynamically Added VLANs:     General Mode Untagged VLANs: 1     General Mode Tagged VLANs:     General Mode Forbidden VLANs:     Trunking Mode Native VLAN: 1 (default)     Trunking Mode Native VLAN Tagging: Disabled     Trunking Mode VLANs Enabled: All     Private VLAN Host Association: none     Private VLAN Mapping:     Private VLAN Operational Bindings:     Default Priority: 0     Protected: Disabled SW2      int-sw2#show interfaces switchport gigabitethernet1/0/5      Port: Gi1/0/5     VLAN Membership Mode: Access Mode     Access Mode VLAN: 215     General Mode PVID: 1 (default)     General Mode Ingress Filtering: Enabled     General Mode Acceptable Frame Type: Admit All     General Mode Dynamically Added VLANs:     General Mode Untagged VLANs: 1     General Mode Tagged VLANs:     General Mode Forbidden VLANs:     Trunking Mode Native VLAN: 1 (default)     Trunking Mode Native VLAN Tagging: Disabled     Trunking Mode VLANs Enabled: All     Private VLAN Host Association: none     Private VLAN Mapping:     Private VLAN Operational Bindings:     Default Priority: 0     Protected: Disabled   VLAN36SW1      int-sw1#show interfaces switchport gi1/0/44      Port: Gi1/0/44     VLAN Membership Mode: Access Mode     Access Mode VLAN: 36     General Mode PVID: 1 (default)     General Mode Ingress Filtering: Enabled     General Mode Acceptable Frame Type: Admit All     General Mode Dynamically Added VLANs:     General Mode Untagged VLANs: 1     General Mode Tagged VLANs:     General Mode Forbidden VLANs:     Trunking Mode Native VLAN: 1 (default)     Trunking Mode Native VLAN Tagging: Disabled     Trunking Mode VLANs Enabled: All     Private VLAN Host Association: none     Private VLAN Mapping:     Private VLAN Operational Bindings:     Default Priority: 0     Protected: Disabled
Two switches don't send traffic to each other