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Community Member

Bridging ATM SubInts+Dot1Q

Hi,

I have a requirement to bridge 3 ATM Subints, and one dot1Q int - Would the following allow layer2 connectivity between the 4 Ints?(So client could run single subnet across all 4 sites):

bridge irb

interface ATM1/0.37 point-to-point

description ATMI ClientA_1

bandwidth 512

no ip route-cache

bridge-group 11

pvc ClientA_1 11/37

tx-ring-limit 3

oam-pvc manage

encapsulation aal5snap

!

!

interface ATM1/0.38 point-to-point

description ATMI ClientA_2

bandwidth 2000

no ip route-cache

bridge-group 11

pvc ClientA_2 11/38

tx-ring-limit 3

oam-pvc manage

encapsulation aal5snap

!

!

interface ATM1/0.39 point-to-point

description ATMI ClientA_3

bandwidth 1000

no ip route-cache

bridge-group 11

pvc ClientA_3 11/39

tx-ring-limit 3

oam-pvc manage

encapsulation aal5snap

!

interface FastEthernet0/0.40

description ClientA_4

encapsulation dot1Q 40

bridge-group 11

bridge 11 protocol ieee

2 REPLIES
Silver

Re: Bridging ATM SubInts+Dot1Q

Also add bridge 1 route ip. I think it may have been added by default. sh bridge group 11 will show if the interfaces are forwarding.

Community Member

Re: Bridging ATM SubInts+Dot1Q

#show run | include bridge

bridge irb

bridge-group 11

bridge-group 11

bridge-group 11

bridge 11 protocol ieee

bridge 11 route ip

It was there...I only have the three atm subints added to bridge 11, but I don't believe the client-ends have the routers connected as yet:

If I remove, then add "bridge 11 route ip", I get the following:

#show bridge group

Bridge Group 11 is running the IEEE compatible Spanning Tree protocol

Port 21 (ATM1/0.37 RFC 1483) of bridge group 11 is listening

Port 20 (ATM1/0.38 RFC 1483) of bridge group 11 is listening

Port 22 (ATM1/0.39 RFC 1483) of bridge group 11 is blocking

Then after ~10 seconds:

#show bridge group

Bridge Group 11 is running the IEEE compatible Spanning Tree protocol

Port 21 (ATM1/0.37 RFC 1483) of bridge group 11 is blocking

Port 20 (ATM1/0.38 RFC 1483) of bridge group 11 is blocking

Port 22 (ATM1/0.39 RFC 1483) of bridge group 11 is blocking

Is that normal?

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