06-22-2010 09:54 PM - edited 03-04-2019 08:52 AM
Dear All,
Can you let me know what does it mean "Bridge-groups1" on interface as below:
interface GigabitEthernet0/0
no ip address
duplex auto
speed auto
bridge-group 1
!
interface GigabitEthernet0/1
no ip address
duplex auto
speed auto
bridge-group 1
!
interface BVI1
ip address 192.168.1.1 255.255.255.0
the interface gi0/0 and Gi0/1 is active/active right?
Best Regards,
Rechard
06-22-2010 11:11 PM
Rechard,
This is part of IRB or Integrated Routing and Bridging.
With this you can Route and Bridge on the same interfaces.
The Bridge group 1 on the gig interfaces tells the router to be part of that group and the BVI1 infact represents the Bridge Group 1 to the rest of the network.(for routing)
Yes, both the Gig interfaces should be active.
You may specify the protocol which you want to be routed too, say "bridge 1 route ip"
and for running spanning tree you need "bridge 1 protocol ieee"
06-23-2010 01:16 AM
Dear Tharak,
Thaks you for your reply!!!
i have some question to ask you about bridg-groups conect to Cat.3560 (2 unit). Let me detail you that:
I have cisco Router 2821 with 3 interface and Cat.3560 (2unit). i would like to connect from Cisco Router 2821 f0/0 connect to internet and f0/1,f0/2 connect to both switch ( Cat.3560) then both cat.3560 connect to access switch.
So i mean that from cisco 2821 to cat.3560 (both) i use protocol bridge-groups1 and from cat.3560 (both) connect to access .
is it possible on this ?
Note : my point i would like to do load balancing ( Active/Active)
Best Regards,
Rechard
06-23-2010 04:37 AM
Hi Rechard,
Yes, it should work as per your design.
You want the BVI to be the gateway for the hosts connected to both the Cats ?
By load balancing, i hope you are just segregating your Users on two different switches, if i got you right ?
06-23-2010 07:21 AM
BVI will participate in spanning-tree, meaning one of the physical interfaces attached should go into blocking.The interface will be up/up but only one of the two will forward traffic. If you disable spanning tree you'll only get a layer 2 loop and likely both routers will go down due to broadcast storms.
If you require load-sharing a portchannel would suit your purpose better, but you cannot channel with one interaface to two separate 3560 switches.
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