From: Jian Gu (guxiaojian@gmail.com)
Date: Sun Aug 06 2006 - 00:39:47 ART
Let me try to answer, please see inline.
On 8/4/06, san <san.study@gmail.com> wrote:
>
> Group,
>
>
> I am trying to do a test with respect to snooping.
>
> R6------------SW1----------------R3.
>
> R3 and R6 are running ospf (L3), SW1 (L2).
>
> Question:
> R6 and R3 are running ospf (multicast neighbor), But i dont see that
> particular multicast mac-address-table mapping. ? Any reason ?
>
>
> sh mac-address-table => I was expecting a "0010.5e00.0001" (224.0.0.1).
#GJ# SW1 in between only learns source MAC not destination MAC. Any MAC
addresses not in MAC table will be flooded to all ports in the VLAN.
The above topology is working for spare-mode and HSRP.
> If i enable "ip pim sparse-dense-mode" on R6 => Then i see "
> 0010.5e00.0128"
> .
#GJ# This is because, when PIM is enabled, the router will send IGMP join
to 224.0.1.39 and 40, when SW1 snoops IGMP joins, the corresponding MACs
will be installed in the MAC table. In the case of OSPF, router interface
will only passively listen to OSPF multicast addresses.
If i enable HSRP, i see correct multicast address being populated.
#GJ# Not sure what you mean here, you mean 0100.5e00.0002 is installed in
the MAC table?can you double check?
-- > Thanks & Rgds > SAN > > _______________________________________________________________________ > Subscription information may be found at: > http://www.groupstudy.com/list/CCIELab.html
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