Bridging an subinterface with physical port

[CiscoMen]

Hi,

On my Cisco C891F, I'm trying to bridge between a sub interface and a physical port (configured with an access vlan 401) as represented in the bellow diagram :

LAN 1 ----- > Port G7 ( vlan401 Untagged) - C891F-01 - Port G8.401 <------ > Port G3 (trunk) - C891F-02 - Interface vlan401

Configuration :

interface GigabitEthernet8.401
 description Interco-WAN-401
 encapsulation dot1Q 401
 no cdp enable
 bridge-group 10
!

interface Vlan401
 no ip address
 bridge-group 10
end

!

The ping between LAN-1 and the Gateway configured on Interface vlan401 of C891F-02 doesn't work !!

Can anyone help me on this topic. Thanks

[mlund]

Hi

See this link that describe how to configure bridging

https://www.cisco.com/c/en/us/support/docs/lan-switching/integrated-routing-bridging-irb/200650-Understanding-Bridge-Virtual-Interface.html

/Mikael

[CiscoMen]

Hi,

Thanks for this return. I've made the same configuration and I had this result :

1. From the Central router : i can ping both sides
2. From each side i can ping the central IP configured on interface BVI, but I can't ping the other side !!

Here is the configuration :

I just changed me topology :

Interface vlan501 - SW-LAN 1 -Port G7 (trunk) <----- > Port G7 ( vlan501 tagged) - C891F-01 - Port G8.401 <------ > Port G3 (trunk) - C891F-02 - Interface vlan401

Central router : C891F-01

bridge irb

bridge 10 protocol ieee

bridge 10 route ip

!

interface GigabitEthernet7
 switchport trunk allowed vlan 1,2,501,1002-1005
 switchport mode trunk
 no ip address
 spanning-tree portfast
!         
interface GigabitEthernet8
 description WAN
 mtu 1514
 no ip address
 no ip redirects
 no ip unreachables
 ip flow ingress
 duplex auto
 speed auto
 media-type rj45
!    
interface GigabitEthernet8.401
 description Interco-To-C891F-02
 encapsulation dot1Q 401
 no cdp enable
 bridge-group 10
! 

interface Vlan501
 description Interco-To-LAN-1
 no ip address
 bridge-group 10

!

interface BVI10
 mtu 1514
 ip address 192.168.10.254 255.255.255.0
end

SW-LAN 1 :

interface Vlan501
 ip address 192.168.10.51 255.255.255.0
end

!

interface GigabitEthernet7
 switchport trunk allowed vlan 1,2,501,1002-1005
 switchport mode trunk
 no ip address
 spanning-tree portfast
end

Central router : C891F-2

interface Vlan401
 ip address 192.168.10.41 255.255.255.0
end

!

interface GigabitEthernet3
 switchport trunk allowed vlan 1,2,401,1002-1005
 switchport mode trunk
 no ip address
 spanning-tree portfast
end

Could you help me PLZ.