Random mac address assigned voor BVI ?

When my BVI interface comes up I get the following :

Mar 1 01:21:54.267:
Note: A random mac address of 0000.0cf6.0dc4
has been chosen for BVI in bridge group 10 since there is no mac
address
associated with the selected interface.
Mar 1 01:21:54.271:
Ensure that this address is unique.

Mar 1 01:22:05.244:
Note: A random Spanning Tree Bridge Identifier address of 0000.0cee.38a4
has been chosen for Bridge Group 10 since there is no mac address
associated with the selected interface.
Mar 1 01:22:05.244:
Ensure that this address is unique.

How do I configure this mac address and spanning tree bridge identifier
static in my router?

Ronald de Leeuw

 

Ronald,
I am not sure if the mac-address and spanning tree bridge identifier can
be hardcoded on a BVI. My question, out of curiousity, is why would you want
to?

It is my understanding that the BVI is going to borrow a mac address from
one of the interfaces in the bridge group, which would make sense since you
want the bridge group to be "seen" at layer 2 i.e. have a mac that is valid
in the CAM. Also, it is my understanding that from a spanning-tree
perspective the BVI will have it's own instance of spanning-tree much like a
VLAN does so I do not see the utility in hardcoding the bridge identifier
either.

Maybe clarifying what you are trying to accomplish will help the group
provide an acceptable solution?

Good Luck
-Robert

 

Let's see how does it work:

RouterB#
RouterB#
RouterB#conf t
Enter configuration commands, one per line. End with CNTL/Z.
RouterB(config)#bridge irb
RouterB(config)#int eth0/0
RouterB(config-if)#bridge
RouterB(config-if)#bridge-group 1
RouterB(config-if)#int bvi 1
RouterB(config-if)#mac-address ?
H.H.H MAC address

RouterB(config-if)#mac-address 00aa.00bb.00cc
RouterB(config-if)#
RouterB(config-if)#end
RouterB#
RouterB#
RouterB#sh int bvi 1 | incl Hardw

Hardware is BVI, address is 00aa.00bb.00cc (bia 0000.0000.0000)

RouterB#


Seems it's possible to add a MAC address to BVI and looks ok..

 

Because BVI is full of bugs if you don't hardcode MACs. Well, to be
fair, I should say that 8540's implementation of BVIs is faulty at best.


--

hsb

"Somehow I imagined this experience would be more rewarding" Calvin
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Ah, I don't have that much experience with BVI outside of xDSL PPPoA
configs, so I was not aware. Thanks...