[Edge core ES4612 & Cisco 3500XL] ES4612 & Cisco 3500XL的switch對連的問題

ES4612為12Port的光纖交換器，再出廠預設的情況下，與Cisco 3500XL 不管是透過光纖或是RJ-45對連時，會一直出現以下訊息

00:02:41: %SPANTREE-7-RECV_1Q_NON_TRUNK: Received 802.1Q BPDU on non trunk GigabitEthernet0/1 VLAN1.
00:02:41: %SPANTREE-7-BLOCK_PORT_TYPE: Blocking GigabitEthernet0/1 on VLAN0001. Inconsistent port type.

這表示此 switch G0/1 所接的設備 port 是設定成 802.1Q (即 tag port) , 但此 switch G0/1 是設定成 access mode (即 untag port),

所以導致此 switch 將 G0/1 block ( 因為 Inconsistent port type ). 

有 2 個解法 ( 2 選 1 )

(1) 請 uplink 的 switch port 改為 access mode ( 即 untag port)

(2) 此 switch G0/1 改為 802.1Q

       ==>   interface GigabitEthernet0/1

                  switchport trunk encapsulation dot1q
                  switchport mode trunk

                !

修改完之後，Cisco的3500XL卻換了一個訊息，不斷地跳出

00:00:58: %SPANTREE-2-RECV_PVID_ERR: Received BPDU with inconsistent peer vlan id 236 on GigabitEthernet0/1 VLAN1.
00:00:58: %SPANTREE-2-BLOCK_PVID_LOCAL: Blocking GigabitEthernet0/1 on VLAN0001. Inconsistent local vlan.
00:00:59: %LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan1, changed state to up

最後是在Edge Core的ES4612上下nospa指令，停止es4612的spantree功能才可以連線