From: Amir.Tahir/Wateen/Lahore (Amir.Tahir@wateen.com)
Date: Mon Mar 31 2008 - 05:40:51 ART
Dear Daniel,
I have configured Multicast in Hub & spoke configuration and able to
ping the spoke to spoke without any issue. I am sending you the
configurations as well. One of my friend complaint the same issue but I
checked before and have configured again to test the connectivity.... I
am using Dynamips 12.3 and if it's an IOS issue please let me know
R3#ping 224.1.1.1 rep 15
Type escape sequence to abort.
Sending 15, 100-byte ICMP Echos to 224.1.1.1, timeout is 2 seconds:
Reply to request 0 from 131.1.123.1, 268 ms
Reply to request 0 from 131.1.123.1, 272 ms
Reply to request 1 from 131.1.123.1, 264 ms
Reply to request 2 from 131.1.123.1, 260 ms
Reply to request 3 from 131.1.123.1, 336 ms
Reply to request 4 from 131.1.123.1, 212 ms
Reply to request 5 from 131.1.123.1, 276 ms
Reply to request 6 from 131.1.123.1, 136 ms
Reply to request 7 from 131.1.123.1, 304 ms
Reply to request 8 from 131.1.123.1, 232 ms
Reply to request 9 from 131.1.123.1, 248 ms
Reply to request 10 from 131.1.123.1, 260 ms
Reply to request 11 from 131.1.123.1, 228 ms
Reply to request 12 from 131.1.123.1, 212 ms
Reply to request 13 from 131.1.123.1, 228 ms
Reply to request 14 from 131.1.123.1, 244 ms
R3#
Configurations of Routers are as follows
R1 Conf
version 12.3
ip multicast-routing
!
interface Loopback0
ip address 1.1.1.1 255.0.0.0
!
interface FastEthernet0/0
ip address 131.1.1.1 255.255.255.0
ip pim sparse-mode
ip igmp join-group 224.1.1.1
duplex auto
speed auto
!
interface Serial1/0
ip address 131.1.123.1 255.255.255.0
ip pim sparse-mode
encapsulation frame-relay
ip ospf priority 0
serial restart-delay 0
no dce-terminal-timing-enable
frame-relay map ip 131.1.123.1 102
frame-relay map ip 131.1.123.2 102 broadcast
frame-relay map ip 131.1.123.3 102
no frame-relay inverse-arp
!
router ospf 1
log-adjacency-changes
network 1.1.1.1 0.0.0.0 area 1
network 131.1.1.1 0.0.0.0 area 1
network 131.1.123.1 0.0.0.0 area 0
R2 configurations
version 12.3
!
hostname R2
!
ip multicast-routing
!
interface Loopback0
ip address 2.2.2.2 255.0.0.0
ip pim sparse-mode
!
interface FastEthernet0/0
ip address 131.2.2.2 255.255.255.0
duplex auto
speed auto
!
interface Serial1/0
ip address 131.1.123.2 255.255.255.0
ip pim nbma-mode
ip pim sparse-mode
encapsulation frame-relay
serial restart-delay 0
no dce-terminal-timing-enable
frame-relay map ip 131.1.123.1 201 broadcast
frame-relay map ip 131.1.123.2 203
frame-relay map ip 131.1.123.3 203 broadcast
no frame-relay inverse-arp
!
router ospf 1
log-adjacency-changes
network 2.2.2.2 0.0.0.0 area 2
network 131.1.123.2 0.0.0.0 area 0
network 131.2.2.2 0.0.0.0 area 2
neighbor 131.1.123.3
neighbor 131.1.123.1
ip pim send-rp-announce Loopback0 scope 10 interval 10
ip pim send-rp-discovery scope 10
!
R3 configurations
version 12.3
!
hostname R3
ip multicast-routing
!
!
interface Loopback3
ip address 3.3.3.3 255.0.0.0
!
interface Ethernet0/0
ip address 131.3.3.3 255.255.255.0
ip pim sparse-mode
full-duplex
!
!
interface Serial1/0
ip address 131.1.123.3 255.255.255.0
ip pim sparse-mode
encapsulation frame-relay
ip ospf priority 0
serial restart-delay 0
no dce-terminal-timing-enable
frame-relay map ip 131.1.123.1 302
frame-relay map ip 131.1.123.2 302 broadcast
frame-relay map ip 131.1.123.3 302
no frame-relay inverse-arp
!
!
router ospf 1
log-adjacency-changes
network 3.3.3.3 0.0.0.0 area 3
network 131.1.123.3 0.0.0.0 area 0
network 131.3.3.3 0.0.0.0 area 3
Regards
__________________
Amir Tahir
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Daniel Valle
Sent: Sunday, March 30, 2008 4:52 AM
To: groupstudy
Subject: Multicast and NBMA again...
I know this has been over and over... but there are always new guys
around.... so here it is again...
I need your expertise . I am labbing up a Hub and spoke scenario.
R2 is the MA and is also the RP for the mcast groups
R1 and R3 are Spokes
R3 f0/0 is set to ip igmp join-group 224.3.3.3
I'm running ospf in all networks.... all is area 0 ( very simple!)
this is the isse I'm facig. If I set the FR network as OSPF network
point-to-multipoint the R1 ( spoke) pings 224.3.3.3 just fine, if I set
the
network to the default ( non broadcast), it does not work.
In one network type, or in the other, all unicasts pings works fine...
with few investigation I saw that when My topology is set to
non-broadcast,
the mcast group gets "P"runned with 3 packets or less.... If the network
is
set to P2M, the ping works fine, the network does not get prunned and
the
"T" flag is set.
I know P2M modifies the nex-hop value of the routes, but I know know
what
else could that make in order to make my topology not to work., I really
don't knwo how that come... the pings stops because the network get's
all
prunned... not because of RF failure...actually neigher scenarios I face
RPF
problems.
Thank you !!
Daniel.
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