10-03-2012 08:34 AM - edited 03-17-2019 11:54 PM
Anyone know if multicast is supported over IRB interfaces - on IOS 15.x and up?
If supported, is there a hidden trick to get it to operate?
We have to upgrade to new hardware & IOS 15.1 and looks like we have big failure.
:
Multicast is fully operational and supported over IRB interfaces on 1760 IOS adventerprisek9-mz.124-25d.bin.
:
THANKS
Frank
:
:
CONFIG:
bridge irb
!
int g0/0.31
encaps dot1q 31
bridge-group 1
!
int g0/0.32
encaps dot1q 32
bridge-group 1
!
int bvi1
ip add 172.16.3.1 /24
ip pim sparse-mode
ip igmp version 3
!
ip pim bidir enable
ip pim autorp listener
no ip pim dm-fallback
!
bridge 1 protocol ieee
bridge 1 route ip
10-04-2012 09:04 AM
UPDATE:
If the BVI interface and related bridge stuff is removed, and the IP address is assigned to the g0/0.31 interface all works as expected.
Comments welcome!!!! . . . and yes it appears to be the BVI stuff breaking multicast.
Tks
Frank
10-12-2012 11:16 AM
Problem resolved!!!
Issues was an IOS bug.
Tks
Frank
01-21-2015 12:48 PM
Hi fsebera,
Would you happen to know which version of IOS is affected by this bug? Did upgrading the IOS ultimately fix the issue or did you have to get rid of the BVIs?
Thanks
01-22-2015 08:18 AM
Hey Mtavarez,
From my experience, it appears this problem is related to the Cisco 2800 series routers IOS 15.1 (and up) while multicast pim and/or multicast BI-DIR pim is operational across a bvi interface. Upgrading to the latest version of IOS for the 2800 series routers did not correct the issue and at this point the Cisco 2800 series routers are EoL/EoS. Although we did resolve this issue and implemented a correction -but in the end- did get rid of the bvi, as it was deemed too cumbersome and was replaced with a pseudowire technology.
HTH
Frank
01-23-2015 10:55 AM
Thanks
07-21-2019 09:22 AM
I believe it may be an IOS bug also. I placed " ip pim spare-mode" on the physical interface along with the bridge group. Once I did that Multicast started to work.
interface G0/0
no ip address
ip pim sparse-mode
bridge-group 1
interface BVI1
ip address 192.168.0.1 255.255.255.0
ip pim sparse-mode
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