Hi Expert,
I have got 2 pairs of stack C3750E and with qinq configuration
topology as below:
===========Site A========== ===========Site B==========
C6509(G3/1)<-->(g2/0/22)C3750E(g1/0/23)<----Service provider ME---> (g1/0/23)C3750E (g2/0/22)<--> C6509(g3/1)
Both C3750E have configured with 1504 MTU size
"system mtu 1504"
i can see SiteB's 3550 by sh cdp n,
but i cannot ping its management vlan IP through this point to point link,
any expert can help ?
configuration:
Site A C6509:
interface GigabitEthernet3/1
switchport
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 50
switchport mode trunk
switchport nonegotiate
logging event link-status
load-interval 30
media-type rj45
interface Vlan50
ip address 192.168.1.1 255.255.255.0
Site A C3750E:
interface GigabitEthernet2/0/22
switchport access vlan 150
switchport mode dot1q-tunnel
switchport nonegotiate
load-interval 30
l2protocol-tunnel cdp
l2protocol-tunnel stp
l2protocol-tunnel vtp
no cdp enable
spanning-tree portfast
interface GigabitEthernet1/0/23
switchport trunk encapsulation dot1q
switchport trunk native vlan 789
switchport mode trunk
switchport nonegotiate
Site B C3750E:
interface GigabitEthernet2/0/22
switchport access vlan 150
switchport mode dot1q-tunnel
switchport nonegotiate
load-interval 30
l2protocol-tunnel cdp
l2protocol-tunnel stp
l2protocol-tunnel vtp
no cdp enable
spanning-tree portfast
interface GigabitEthernet1/0/23
switchport trunk encapsulation dot1q
switchport trunk native vlan 789
switchport mode trunk
switchport nonegotiate
Site B C6509:
interface GigabitEthernet3/1
switchport
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 50
switchport mode trunk
switchport nonegotiate
logging event link-status
load-interval 30
media-type rj45
interface Vlan50
ip address 192.168.1.2 255.255.255.0
