Cisco 3750 linking to Cisco SF302 SMB

[Aaron Alvarado]

Hi,

 I have a connectivity issue with vlan231 set on my smb SF302.  Here is my scenario my core is a 3750 interconnecting to this smb switch which i am able to remote in, but when set port to use vlan231 on the smb no traffic is passed to my pc set with a 231 static IP. my native and management vlan is 224 which i am able to connect to  but when I set port FE3 to use vlan231 no traffic passes to my pc set to 10.23.231.54\24 gt 10.23.231.5.  Any suggestions?

3750 uplink port

interface GigabitEthernet1/0/18
 description TO FILL ROOM CONTROLLER
 switchport trunk encapsulation dot1q
 switchport trunk native vlan 224
 switchport mode trunk
 switchport block multicast
 switchport block unicast
 power inline never
 speed 100
 duplex full
 spanning-tree portfast
end

Vlan Interface at core

!
interface Vlan231
 ip address 10.23.231.5 255.255.255.0
end

 Cisco SMB SF302 upnk

interface fastethernet1
 no negotiation
 description "TO Core Gi1/0/18"
 power inline never
 switchport trunk allowed vlan add 231

Client PC Port 

interface fastethernet3
 description "FILL ROOM PC"
 storm-control broadcast level 10
 port security max 10
 port security mode max-addresses
 port security discard trap 60
 spanning-tree portfast
 macro description server
 power inline never
 switchport trunk allowed vlan add 231
 macro auto smartport type server $max_hosts 10 $native_vlan 224

[michael o'nan]

To me it looks like the issue may be that your 300 switch is tagging 231 going upstream to the 3750. On the 3750 you should try to remove the native command and just leave it as an 802.1q trunk and prune all VLANs except 231.

[Aaron Alvarado]

Michael,

 Initially i had the 3750 uplink port without the native vlan command and I was not able to connect to my smb switch.  after I added the native vlan then I could connect to it, so I am afraid if i remove i will loose connectivity.