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7.8.1.0 - Force10 Networks

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Figure 327<br />

In Figure 327, VLAN 400 is configured with an access list to permit only IGMP reports for group<br />

239.0.0.1. Though Receiver 2 sends a membership report for groups 239.0.0.1 and 239.0.0.2, a multicast<br />

routing table entry is created only for group 239.0.0.1. VLAN 300 has no access list limiting Receiver 1, so<br />

both IGMP reports are accepted, and two corresponding entries are created in the routing table.<br />

Preventing a Host from Joining a Group<br />

interface GigabitEthernet 3/21<br />

ip pim sparse-mode<br />

ip address 10.11.23.2/24<br />

no shutdown<br />

Source 1<br />

10.11.5.2<br />

interface GigabitEthernet 2/31<br />

ip pim sparse-mode<br />

ip address 10.11.23.1/24<br />

no shutdown<br />

Source 2<br />

10.11.1.2<br />

interface GigabitEthernet 3/1<br />

ip pim sparse-mode<br />

ip address 10.11.5.1/24<br />

no shutdown<br />

interface GigabitEthernet 2/1<br />

ip pim sparse-mode<br />

ip address 10.11.1.1/24<br />

no shutdown<br />

239.0.0.2<br />

239.0.0.1<br />

R2<br />

3/1<br />

2/31 3/21<br />

2/1<br />

R3<br />

interface GigabitEthernet 3/11<br />

ip pim sparse-mode<br />

ip address 10.11.13.2/24<br />

no shutdown<br />

3/11<br />

2/11<br />

RP<br />

ip multicast-routing<br />

ip pim rp-address 10.11.12.2 group-address 224.0.0.0/4<br />

router rip<br />

network 10.0.0.0<br />

interface GigabitEthernet 2/11<br />

ip pim sparse-mode<br />

ip address 10.11.12.2/24<br />

no shutdown<br />

interface GigabitEthernet 1/21<br />

ip pim sparse-mode<br />

ip address 10.11.12.1/24<br />

no shutdown<br />

R1(conf )#do show run acl<br />

!<br />

ip access-list extended igmpjoinfilR2G2<br />

seq 5 permit ip any host 239.0.0.1<br />

1/21<br />

R1(conf-if-vl-400)# do show ip pim tib<br />

502 Multicast Features<br />

interface GigabitEthernet 1/31<br />

ip pim sparse-mode<br />

ip address 10.11.13.1/24<br />

no shutdown<br />

1/31<br />

R1<br />

R1(conf-if-vl-300)# do show ip pim tib<br />

PIM Multicast Routing Table<br />

Flags: D - Dense, S - Sparse, C - Connected, L - Local, P - Pruned,<br />

R - RP-bit set, F - Register flag, T - SPT-bit set, J - Join SPT,<br />

M - MSDP created entry, A - Candidate for MSDP Advertisement<br />

K - Ack-Pending State<br />

Timers: Uptime/Expires<br />

Interface state: Interface, next-Hop, State/Mode<br />

PIM Multicast Routing Table<br />

Flags: D - Dense, S - Sparse, C - Connected, L - Local, P - Pruned,<br />

R - RP-bit set, F - Register flag, T - SPT-bit set, J - Join SPT,<br />

M - MSDP created entry, A - Candidate for MSDP Advertisement<br />

K - Ack-Pending State<br />

Timers: Uptime/Expires<br />

Interface state: Interface, next-Hop, State/Mode<br />

(*, 239.0.0.1), uptime 00:00:06, expires 00:00:00, RP 10.11.12.2, flags: SCJ<br />

Incoming interface: GigabitEthernet 1/21, RPF neighbor 10.11.12.2<br />

Outgoing interface list:<br />

Vlan 400 Forward/Sparse 00:00:06/Never<br />

interface Vlan 300<br />

ip pim sparse-mode<br />

ip address 10.11.3.1/24<br />

untagged GigabitEthernet 1/1<br />

no shutdown<br />

(*, 239.0.0.1), uptime 00:00:07, expires 00:00:00, RP 10.11.12.2, flags: SCJ<br />

Incoming interface: GigabitEthernet 1/21, RPF neighbor 10.11.12.2<br />

Outgoing interface list:<br />

Vlan 300 Forward/Sparse 00:00:07/Never<br />

Receiver 1<br />

10.11.3.2<br />

Group: 239.0.0.1, 239.0.0.2<br />

interface Vlan 400<br />

ip pim sparse-mode<br />

ip address 10.11.4.1/24<br />

untagged GigabitEthernet 1/2<br />

ip igmp access-group igmpjoinfilR2G2<br />

no shutdown<br />

ip igmp snooping enable<br />

(*, 239.0.0.2), uptime 00:01:10, expires 00:00:00, RP 10.11.12.2, flags: SCJ<br />

Incoming interface: GigabitEthernet 1/21, RPF neighbor 10.11.12.2<br />

Outgoing interface list:<br />

Vlan 300 Forward/Sparse 00:01:10/Never<br />

Receiver 2<br />

10.11.4.2<br />

Group: 239.0.0.1, 239.0.0.2

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