Bridging between Ethernet and Multilink interface problem

[expbits13]

Hi,

I'm trying to do transparent bridging with the following setup but im unable to pass traffic from R1 to the PE router. My goal is to use R2 as a L2 bridge to get connectivity between R1 and PE1. R1 doesn't have the necessary module hence this setup and i dont manage the PE side..

Just testing this to avoid paying on having extra hardware:)

    R1 F0/0     <>   F0/0 R2 Multilink1 (s1/0,s1/1)   <>    Multilink1 (s1/0, s1/1) PE1 

   1.1.1.1/30                                                                     1.1.1.2/30

First issue that I see is the IP address on the Multilink on the PE side. I have the multilink interface UP between R2 and PE, 1.1.1.0/30 is not being installed as a connected interface on the routing table. Not sure how can go around this. Below is the config for reference.  

Is this setup even possible? Or i'm missing something? Any help will be much appreciated. Thanks in advanced!

R1:

interface FastEthernet0/0

ip add 1.1.1.1 255.255.255.252

R2:

bridge irb

bridge 1 protocol ieee

interface FastEthernet0/0

bridge-group 1

interface Multilink1

no ip address

ppp multilink

ppp multilink group 1

bridge-group 1

interface Serial1/0

no ip address

encapsulation ppp

serial restart-delay 0

ppp multilink

ppp multilink group 1

interface Serial1/1

no ip address

encapsulation ppp

serial restart-delay 0

ppp multilink

ppp multilink group 1

PE1:

interface Multilink1

ip address 1.1.1.2 255.255.255.252

ppp multilink

ppp multilink group 1

interface Serial1/0

no ip address

encapsulation ppp

serial restart-delay 0

ppp multilink

ppp multilink group 1

interface Serial1/1

no ip address

encapsulation ppp

serial restart-delay 0

ppp multilink

ppp multilink group 1

[Richard Burts]

There are parts of your post that are not clear to me. In particular in which routing table are you expecting to see the /30 network? Are you looking on R1 (where I would expect it to be) or on R2 (where the expected behavior is that the subnet will not be in the routing table since R2 is bridging that subnet and not routing it).

If I were doing this I probably would not use irb on R2. irb gives you the ability to interface the bridged domain to the routed domain. But based on what you have shown us there is not a routed domain on R2. I would suggest that you configure no ip routing on R2, remove the bridge irb command, and use the rest of the config as you have it.

HTH

Rick