Lab 165 - Multicast Rate Limiting

Prerequisites: CCNP level skills.

Topology

Pic. 1 - Topology Diagram.

Note!
Routers and switches are already configured as per the topology diagram. 

Task 1

Configure R3 so that it limits the overall multicast traffic (the aggregate rate) to 5 Mbps out its F0/0 interface. The same interface should limit the traffic to IP 224.1.1.1 to 256 Kbps for every multicast traffic source to this group.

Solution


Task 1

Configure R3 so that it limits the overall multicast traffic (the aggregate rate) to 5 Mbps out its F0/0 interface. The same interface should limit the traffic to IP 224.1.1.1 to 256 Kbps for every multicast traffic source to this group.

 R3 Configuration:

!

ip access-list standard LIMIT_256
 permit 224.1.1.1

!

interface FastEthernet0/0
 ip address 10.1.30.3 255.255.255.0
 ip pim sparse-mode
 ip multicast rate-limit out group-list LIMIT_256 256
 ip multicast rate-limit out 5000
 speed 100
 full-duplex

!

Notice!
If the command 'ip multicast rate-limit' is used without a destination (and possibly source address) access-list, it limits the aggreate traffic. In case ACL is defined, it limits the traffic to a given value per source. This means, that if there are two senders to 224.1.1.1 (here), the aggregate traffic is 2 x 256 Kbps.

Verification:

S2 Configuration:

!

interface Vlan30
 ip address 10.1.30.12 255.255.255.0
 ip igmp join-group 224.1.1.1

!

Ping from S3 (RP) to 224.1.1.1 and the mroute table on R3 below:

Pic. 2 - R3 Limits the Traffic.

S4 Configuration:

!

interface Vlan30
 ip address 10.1.30.14 255.255.255.0
 ip igmp join-group 224.10.10.10

!

Ping from S3 to 224.10.10.10. R3 mroute table below:

Pic. 3 - R3 Limits the Traffic.

IP Multicast rate-limit

source: http://www.cisco.com/en/US/docs/ios/12_2t/12_2t15/feature/guide/ft_igmps.html#wp1045300