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Chapter 2

IP Multicast in a Campus Network

IP Multicast Small Campus Design

ip pim send-rp-announce Loopback0 scope 16 group-list 1 ! ip pim send-rp-discovery Loopback0 scope 16

! ! access-list 1 permit 239.192.240.0 0.0.3.255 access-list 1 permit 239.192.244.0 0.0.3.255 access-list 1 permit 239.192.248.0 0.0.3.255 access-list 1 permit 239.255.0.0 0.0.3.255

Sends an Auto-RP announcement message to the 224.0.1.39 group. Sends an Auto-RP announcement message to the 224.0.1.40 group.

The following examples show how to verify that the access layer switches have found their attached multicast routers. On 3550-left-access, display the IGMP snooping multicast router information:

3550-left-access#show ip igmp snooping mrouter

2

Gi0/1(dynamic

12

Gi0/1(dynamic)

2

Gi0/2(dynamic

12

Gi0/2(dynamic)

Gi0/1 connects to “4kS3-right-BB”

Gi0/2 connects to “4kS3-left-BB”

Vlan

--

--

ports

-----

On 3524-right-access, display the CGMP Server and Client operation:

3524-right-access#show cgmp CGMP is running. CGMP Fast Leave is not running. CGMP Allow reserved address to join GDA . Default router timeout is 300 sec.

vLAN

IGMP Router

Expire

Interface

------

-----------------

--------

----------

3

0010.7bab.983f

281 sec

Gi0/1

13

0010.7bab.983f

281 sec

Gi0/1

3

0010.7bab.983e

281 sec

Gi0/2

13

0010.7bab.983e

281 sec

Gi0/2

Gi0/1 connects to “4kS3-right-BB”

Gi0/2 connects to “4kS3-left-BB”

Interfaces -----------

vLAN ------

IGMP MAC Address -----------------

Once Auto-RP multicast traffic is flowing to the switches, check to see that multicast group entries show up in their CAM tables.

3550-left-access#show mac-address-table multicast

Vlan

Mac Address

Type

----

-----------

----

2

0100.5e00.0002

IGMP

2

0100.5e00.0127

IGMP

2

0100.5e00.0128

IGMP

12

0100.5e00.0002

IGMP

12

0100.5e00.0127

IGMP

12

0100.5e00.0128

IGMP

Ports ----- Gi0/1, Gi0/1, Gi0/1, Gi0/1, Gi0/1, Gi0/1 ,

Gi0/2 Gi0/2 Gi0/2 Gi0/2 Gi0/2 Gi0/2

Cisco AVVID Network Infrastructure IP Multicast Design

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