[c-nsp] L2 Ethernet bridging over GRE issues

[Roger Wiklund]

I'm trying to accomplish the following:


Host A - 10.10.10.10/24
                |
           Router A
                |
           "Internet"
                |
           Router B
                |
Host B - 10.10.10.20/24

I've setup a GRE tunnel from Router A to Router B.
I've configured bridging between Tunnel0 and LAN interface on Router A
and Router B

>From Host A I can ping Host B and vice versa. So far so good, bridging works.

Router A is my "main" router and thus I've configured a BVI1 Interface
with IP 10.10.10.1/24
I've also enabled "bridge 1 route ip" on Router A.

So from Host A, I can ping 10.10.10.1, 10.10.10.20(bridging) and any
other destination on the "Internet" using the BVI1 IP as default gw.

However, here is the problem:
Host B cannot ping 10.10.10.1, nor any other IP on the "Internet",
(Host B default gateway is 10.10.10.1)

BTW this is all in dynamips with C2691 with advipservices 12.4(15)T14

What could be the problem here?

Here is Router A's config:

bridge irb
!
interface Loopback0
 ip address 1.1.1.1 255.255.255.255
!
interface Tunnel0
 description Tunnel To Router B
 no ip address
 tunnel source Loopback0
 tunnel destination 2.2.2.2
 bridge-group 1
 bridge-group 1 spanning-disabled
!
interface FastEthernet0/1
 description LAN
 no ip address
 speed 100
 full-duplex
 bridge-group 1
 bridge-group 1 spanning-disabled
!
interface BVI1
 ip address 10.10.10.1 255.255.255.0
!
bridge 1 protocol ieee
bridge 1 route ip



Router B:

bridge irb
!
interface Loopback0
 ip address 2.2.2.2 255.255.255.255
!
interface Tunnel0
 description Tunnel to Router A
 no ip address
 tunnel source Loopback0
 tunnel destination 1.1.1.1
 bridge-group 1
 bridge-group 1 spanning-disabled
!
interface FastEthernet0/1
 description LAN
 no ip address
 duplex auto
 speed auto
 bridge-group 1
 bridge-group 1 spanning-disabled
!
bridge 1 protocol ieee
bridge 1 route ip