7.8.1.0 - Force10 Networks

In Figure 328, Source 1 and Source 2 are both transmitting packets for groups 239.0.0.1 and 239.0.0.2. R3
has a PIM register filter that only permits packets destined for group 239.0.0.2. An entry is created for
group 239.0.0.1 in the routing table, but no outgoing interfaces are listed. R2 has no filter, so it is allowed
to forward both groups. As a result, Receiver 1 receives only one transmission, while Receiver 2 receives
duplicate transmissions.
Figure 328
R3(conf )#do show ip pim tib
interface GigabitEthernet 3/21
ip pim sparse-mode
ip address 10.11.23.2/24
R2(conf )#do show ip pim tib
Preventing a Source from Transmitting to a Group
PIM Multicast Routing Table
Flags: D - Dense, S - Sparse, C - Connected, L - Local, P - Pruned,
R - RP-bit set, F - Register flag, T - SPT-bit set, J - Join SPT,
M - MSDP created entry, A - Candidate for MSDP Advertisement
K - Ack-Pending State
Timers: Uptime/Expires
Interface state: Interface, next-Hop, State/Mode
Source 1
10.11.5.2
no shutdown
interface GigabitEthernet 2/31
ip pim sparse-mode
ip address 10.11.23.1/24
no shutdown
Source 2
10.11.1.2
PIM Multicast Routing Table
Flags: D - Dense, S - Sparse, C - Connected, L - Local, P - Pruned,
R - RP-bit set, F - Register flag, T - SPT-bit set, J - Join SPT,
M - MSDP created entry, A - Candidate for MSDP Advertisement
K - Ack-Pending State
Timers: Uptime/Expires
Interface state: Interface, next-Hop, State/Mode
interface GigabitEthernet 3/1
ip pim sparse-mode
ip address 10.11.5.1/24
no shutdown
interface GigabitEthernet 2/1
ip pim sparse-mode
ip address 10.11.1.1/24
no shutdown
(10.11.5.2, 239.0.0.1), uptime 00:05:21, expires 00:02:46, flags: FT
Incoming interface: GigabitEthernet 3/1, RPF neighbor 0.0.0.0
Outgoing interface list:
GigabitEthernet 3/11 Forward/Sparse 00:00:18/00:03:12
(*, 239.0.0.1), uptime 00:03:00, expires 00:02:32, RP 10.11.12.2, flags: SF
Incoming interface: Null, RPF neighbor 0.0.0.0
Outgoing interface list:
GigabitEthernet 2/11 Forward/Sparse 00:03:00/00:02:32
239.0.0.2
239.0.0.1
R2
(10.11.5.2, 239.0.0.2), uptime 00:05:08, expires 00:03:26, flags: FT
Incoming interface: GigabitEthernet 3/1, RPF neighbor 0.0.0.0
Outgoing interface list:
3/1
2/31 3/21
2/1
R3
(10.11.1.2, 239.0.0.1), uptime 00:00:44, expires 00:02:56, flags: FT
Incoming interface: GigabitEthernet 2/1, RPF neighbor 0.0.0.0
Outgoing interface list:
GigabitEthernet 2/11 Forward/Sparse 00:00:13/00:03:17
interface GigabitEthernet 3/11
ip pim sparse-mode
ip address 10.11.13.2/24
no shutdown
ip multicast-routing
ip pim rp-address 10.11.12.2 group-address 224.0.0.0/4
router rip
network 10.0.0.0
3/11
2/11
interface GigabitEthernet 2/11
ip pim sparse-mode
ip address 10.11.12.2/24
no shutdown
(10.11.5.2, 239.0.0.1), uptime 00:00:26, expires 00:03:06, flags: P
Incoming interface: GigabitEthernet 2/31, RPF neighbor 10.11.23.2
Outgoing interface list:
R3(conf )#do show run acl
!
ip access-list extended regfilS1G2
seq 5 permit ip host 10.11.5.2 host 239.0.0.1
R3(conf )#do show run pim
!
ip pim rp-address 10.11.12.2 group-address 224.0.0.0/4
ip pim register-filter regfilS1G2
interface GigabitEthernet 1/21
ip pim sparse-mode
ip address 10.11.12.1/24
no shutdown
1/21
(*, 239.0.0.2), uptime 00:00:21, expires 00:03:09, RP 10.11.12.2, flags: SF
Incoming interface: Null, RPF neighbor 0.0.0.0
Outgoing interface list:
GigabitEthernet 2/11 Forward/Sparse 00:00:21/00:03:09
interface GigabitEthernet 1/31
ip pim sparse-mode
ip address 10.11.13.1/24
no shutdown
1/31
R1
RP
(10.11.1.2, 239.0.0.2), uptime 00:00:02, expires 00:03:28, flags: FT
Incoming interface: GigabitEthernet 2/1, RPF neighbor 0.0.0.0
Outgoing interface list:
GigabitEthernet 2/11 Forward/Sparse 00:00:21/00:03:09
504 Multicast Features
R1(config-line-console)#do show ip pim tib
interface Vlan 300
ip pim sparse-mode
ip address 10.11.3.1/24
untagged GigabitEthernet 1/1
no shutdown
PIM Multicast Routing Table
Flags: D - Dense, S - Sparse, C - Connected, L - Local, P - Pruned,
R - RP-bit set, F - Register flag, T - SPT-bit set, J - Join SPT,
M - MSDP created entry, A - Candidate for MSDP Advertisement
K - Ack-Pending State
Timers: Uptime/Expires
Interface state: Interface, next-Hop, State/Mode
interface Vlan 400
ip pim sparse-mode
ip address 10.11.4.1/24
untagged GigabitEthernet 1/2
no shutdown
Receiver 1
10.11.3.2
Group: 239.0.0.2
(*, 239.0.0.1), uptime 00:00:43, expires 00:00:00, RP 10.11.12.2, flags: SCJ
Incoming interface: GigabitEthernet 1/21, RPF neighbor 10.11.12.2
Outgoing interface list:
Vlan 400 Forward/Sparse 00:00:43/Never
ip igmp snooping enable
(10.11.1.2, 239.0.0.1), uptime 00:00:17, expires 00:03:17, flags: CT
Incoming interface: GigabitEthernet 1/21, RPF neighbor 10.11.12.2
Outgoing interface list:
Vlan 400 Forward/Sparse 00:00:43/Never
Receiver 2
10.11.4.2
Group: 239.0.0.1
(10.11.5.2, 239.0.0.1), uptime 00:00:23, expires 00:03:17, flags: CT
Incoming interface: GigabitEthernet 1/31, RPF neighbor 10.11.13.2
Outgoing interface list:
Vlan 400 Forward/Sparse 00:00:43/Never
(*, 239.0.0.2), uptime 00:00:40, expires 00:00:00, RP 10.11.12.2, flags: SCJ
Incoming interface: GigabitEthernet 1/21, RPF neighbor 10.11.12.2
Outgoing interface list:
Vlan 300 Forward/Sparse 00:00:40/Never
(10.11.5.2, 239.0.0.2), uptime 00:00:33, expires 00:03:07, flags: CT
Incoming interface: GigabitEthernet 1/31, RPF neighbor 10.11.13.2
Outgoing interface list:
Vlan 300 Forward/Sparse 00:00:40/Never