From: Pavel Bykov (slidersv@gmail.com)
Date: Mon Feb 02 2009 - 17:59:38 ARST
George, that is a great observation.
On Mon, Feb 2, 2009 at 5:34 PM, George Roman <georgeroman@gmail.com> wrote:
> Hi Nitro
>
> a)ip pim nbma-mode is used only for sparse-mode.
>
> b)The 224.0.1.39 and 224.0.1.40 groups are used in dense fashion.
>
> a) + b) = you need to tunnel in this case
>
>
> Best regards,
> George
>
> On Wed, Jan 21, 2009 at 1:04 PM, Nitro Drops <nitrodrops@hotmail.com>
> wrote:
>
> > Hi All,
> >
> > Have been practising multicast by placing around RP and MA around in a
> > Hub-N-Spoke.
> >
> > R3 - Spoke1 > RP
> > R2 - Hub
> > R4 - Spoke2 > MA
> >
> > R3 s2/1 >> s2/1 R2 s2/1 >> s2/1 R4
> >
> > Full Reachability using EIGRP.
> >
> > R2
> > interface Serial2/1
> > ip address 155.8.10.2 255.255.255.0
> > ip pim nbma-mode <<< included this
> > ip pim sparse-mode
> > encapsulation frame-relay
> > no ip split-horizon eigrp 1
> > no ip mroute-cache
> > frame-relay map ip 155.8.10.3 203 broadcast
> > frame-relay map ip 155.8.10.4 204 broadcast
> > no frame-relay inverse-arp
> > !
> > ip pim autorp listener
> >
> > R3 (RP)
> > ip pim autorp listener
> > ip pim send-rp-announce Loopback0 scope 16
> >
> > R4 (MA)
> > ip pim autorp listener
> > ip pim send-rp-discovery Loopback0 scope 16
> >
> >
> > QNS 1 : I kept encountering the announcement 224.0.1.39 from RP > MA got
> > stuck
> > at the Hub, even though i have configured "ip pim nbma mode". Did i miss
> > out
> > anything?
> >
> >
> > P(0): s=150.8.3.3 (Serial2/1) d=224.0.1.39 id=299, ttl=15, prot=17,
> > len=52(48), mroute olist null
> > IP(0): s=150.8.3.3 (Serial2/1) d=224.0.1.39 id=322, ttl=15, prot=17,
> > len=52(48), mroute olist null
> >
> > l
> > R2#sh ip mro
> > IP Multicast Routing Table
> >
> > Outgoing interface flags: H - Hardware switched, A - Assert winner
> > Timers: Uptime/Expires
> > Interface state: Interface, Next-Hop or VCD, State/Mode
> >
> > (*, 224.0.1.39), 00:14:52/stopped, RP 0.0.0.0, flags: DC
> > Incoming interface: Null, RPF nbr 0.0.0.0
> > Outgoing interface list:
> > Serial2/1, Forward/Sparse, 00:14:06/00:00:00
> >
> > (150.8.3.3, 224.0.1.39), 00:00:46/00:02:13, flags: PT
> > Incoming interface: Serial2/1, RPF nbr 155.8.10.3
> > Outgoing interface list: Null
> >
> > (*, 224.0.1.40), 00:15:04/00:02:18, RP 0.0.0.0, flags: DCL
> > Incoming interface: Null, RPF nbr 0.0.0.0
> > Outgoing interface list:
> > Serial2/1, Forward/Sparse, 00:14:07/00:00:00
> >
> >
> > QNS 2 : if all the 3 routers are running 'sparse-dense' mode, a tunnel
> will
> > be
> > required between the spokes. Since 'ip nbma mode' is only supported on
> > 'sparse-mode'
> >
> > QNS 3 : if all the 3 routers are running 'dense' mode, R3 (Server) R2
> > (Client), again a tunnel will be required between the spokes, since the
> > incoming CANT be the same as the outgoing interface on the multicast
> > routing
> > table.
> >
> >
> > Cheers
> > Nit
> >
> > _________________________________________________________________
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