From: udo (ccie_ka@arcor.de)
Date: Sun Mar 25 2007 - 03:23:15 ART
David,
thx for this link....this is also what I'm searching for the last
times....;-))
great !!
Am Freitag, den 23.03.2007, 21:58 -0400 schrieb David Prall:
> Try adding an IGMP Queurier. It use to be that IGMP Snooping had to be
> enabled. For IGMP Snoopint you have to have an IGMP router, which will be
> enabled by configuring PIM. You can disable IGMP Snooping, but IGMP Querier
> allows you to leave it enabled.
>
> http://www.cisco.com/en/US/products/hw/switches/ps708/products_tech_note0918
> 6a008059a9df.shtml
>
> --
> http://dcp.dcptech.com
>
>
> > -----Original Message-----
> > From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On
> > Behalf Of Peyton Schouest
> > Sent: Friday, March 23, 2007 4:14 AM
> > To: ccieben@cox.net
> > Cc: ccielab@groupstudy.com
> > Subject: Re: multicast.
> >
> > Ben,
> >
> > Thank you for your reply. This is on a 6513 also and I have
> > not seen the
> > issue but the sys admin swears that it is a well known issue
> > with Cisco
> > switches. Basically he read this on the server vendors
> > website in a forum.
> > Since he has already briefed this view up to leadership it is
> > on my shop to
> > prove that the switch is not the actual problem. I am going
> > to start doing
> > some pretty lengthy captures and investigation to prove that
> > the problem
> > either resides on the switch or not. I'll let you know what I
> > find out.
> >
> >
> > Thanks,
> >
> > Peyton
> >
> > >From: Ben <ccieben@cox.net>
> > >To: Peyton Schouest <pschouest@hotmail.com>
> > >CC: ccielab@groupstudy.com
> > >Subject: Re: multicast.
> > >Date: Thu, 22 Mar 2007 22:22:42 -0400
> > >
> > >Hi Peyton,
> > >
> > >My employer has a fair amount of servers that have Multicast
> > heartbeats -
> > >VMWare ESX, Novell Clusters etc... all running on Native IOS
> > Cat6513's with
> > >no Multicast routing or other special considerations taken.
> > >
> > >Have you actually seen any problems occur with your setup or
> > is this all
> > >hear-say and conjecture by the sysadmin?
> > >
> > >Ben
> > >
> > >Peyton Schouest wrote:
> > >>I have come across a situation at work wondering if any of the more
> > >>knowledgable people out there could shed some light on this for me.
> > >>
> > >>>From my understanding if a switch does not know what ports
> > a multicast
> > >>packet should go to it will broadcast it by default. The
> > issue at work is
> > >>we have two servers that basically have a heart beat or stay alive
> > >>communiction between them and they use a multicast address.
> > Both servers
> > >>are on the same vlan same switch. The heart beat is set for
> > once every 10
> > >>seconds the two servers will send out one multicast packet.
> > This all seems
> > >>pretty straight forward except that I have a sys admin
> > telling me it will
> > >>not work because cisco switches will only forward 3 packets
> > and then it
> > >>quits forwarding multicast by default which I have never in
> > my life heard
> > >>of. Because of this "feature" he states that we must enable
> > multicast
> > >>routing and pim on the vlan interface for the servers heart
> > beat to work.
> > >>I have never heard of any so called feature or bug before
> > concerning a
> > >>cisco switch. Has anyone dealt with something like this
> > before or able to
> > >>stregnthen an argument from either side? Thank you for your
> > help before
> > >>hand.
> > >>
> > >>
> > >>Peyton
> > >>
> > >>_________________________________________________________________
> > >>Watch free concerts with Pink, Rod Stewart, Oasis and more.
> > Visit MSN
> > >>Presents today.
> > >>http://music.msn.com/presents?icid=ncmsnpresentstagline&ocid
> > =T002MSN03A07001
> > >>
> > >>
> > >>____________________________________________________________
> > ___________
> > >>Subscription information may be found at:
> > >>http://www.groupstudy.com/list/CCIELab.html
> > >>
> > >
> >
> > _________________________________________________________________
> > Its tax season, make sure to follow these few simple tips
> > http://articles.moneycentral.msn.com/Taxes/PreparationTips/Pre
> > parationTips.aspx?icid=HMMartagline
> >
> > ______________________________________________________________
> > _________
> > Subscription information may be found at:
> > http://www.groupstudy.com/list/CCIELab.html
>
> _______________________________________________________________________
> Subscription information may be found at:
> http://www.groupstudy.com/list/CCIELab.html
This archive was generated by hypermail 2.1.4 : Sun Apr 01 2007 - 06:35:52 ART