problems with extra packets

[chongmengpeh]

hi guys, i have a set-up as shown in the pic, s=switch and r=routers. i configured HSRP for routers as well as multicast pim-dense mode. i found that there are always extra packets sent from sender to receiver periodically. what could be causing this?

[vmiller]

have you captured any of these packets?

if so, what are the port numbers in use.

[chongmengpeh]

the packets are exactly the same, from the same multicast port.

[Joseph W. Doherty]

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The   Author of this posting offers the information contained within this   posting without consideration and with the reader's understanding that   there's no implied or expressed suitability or fitness for any purpose.   Information provided is for informational purposes only and should not   be construed as rendering professional advice of any kind. Usage of  this  posting's information is solely at reader's own risk.

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Posting

PIM dense mode - perhaps you're seeing flood/prune multicast traffic?

[chongmengpeh]

i think you might be right, because by continuouly sending 1 packets per/s i realise that the extra packets take place after the prune timer is up. Is there a way out of this?

[Joseph W. Doherty]

Disclaimer

The  Author of this posting offers the information contained within this  posting without consideration and with the reader's understanding that  there's no implied or expressed suitability or fitness for any purpose.  Information provided is for informational purposes only and should not  be construed as rendering professional advice of any kind. Usage of this  posting's information is solely at reader's own risk.

Liability Disclaimer

In  no event shall Author be liable for any damages whatsoever (including,  without limitation, damages for loss of use, data or profit) arising out  of the use or inability to use the posting's information even if Author  has been advised of the possibility of such damage.

Posting

PIM Sparse Mode.  However, if the multicast traffic is low relatively to the bandwidth, and the network is small, you might just not worry about it.

[chongmengpeh]

Hi,

Unfortunately traffic is high. I tried sparse and it worked. However, with the rp set at one of the transmitting router, of the router goes down, it means there is no rp and my hsrp is rendered useless