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multicast problem

Hi,

we using multicast applications in our network and some days ago we encountered this problem which is related with multicast operation.

We have such topology in our network:

RP

---------------

| Cat_6506 |

---------------

|

|

| R1

--------------- g0/1

| Cisco_7606 |-------RECEIVER_2

* ---------------

* | g0/2

* |

* | R2

* ---------------

* | Cat_3750 |---RECEIVER_1/SOURCE_1

* ---------------

*

In this topology SOURCE_1 is sending multicast traffic with multicast group address 239.10.10.1, RECEIVER_1 is requesting this group and receiving multicast traffic from SOURCE_1.

Then if RECEIVER_2 will start requesting multicast traffic for group 239.10.10.1, Cisco_7606 will add the interface g0/1 in output interface list for (*, 239.10.10.1) group, but this change in output interface list will not trigger Cisco_7606 to send pim join with this group to RP. The pim join will be sended after pim Join/Prune-Period [60s] for this group and only then RECEIVER_2 will receive multicast traffic from SOURCE_1. We think that somethink wrong is with multicast operation at this poin in Cisco7606.

In this situation Receiver_2 must wait from 1-60s [depending when the previos pim join message for this group was send to RP] for multicast traffic from SOURCE_1.

Does anybody had this problem and thanks in advance for comments.

Cisco_7606: IOS Version 12.2(18)SXF3

Antanas

  • Other Network Infrastructure Subjects
1 REPLY
Bronze

Re: multicast problem

You are hitting the bug CSCec37022. Upgrade your switch IOS to the release recommended in the bug notes.

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