From: Pradeep Chandrashekaran (chanpraddy@gmail.com)
Date: Wed Mar 25 2009 - 14:25:59 ART
Hey group,
I have a task which asks me to filter a switch from receiving
traffic for administratively scoped multicast groups regardless of any IGMP
join messages it receives.
The scenario is :
R4---Fa0/0------Fa0/15---------SW1
My Solution was:
R4#sh run int fa0/0
Building configuration...
Current configuration : 146 bytes
!
interface FastEthernet0/0
ip address 178.1.38.3 255.255.255.0
ip pim sparse-dense-mode
ip igmp access-group 11
duplex auto
speed auto
end
R4#
R4#sh run | sec access-list 11
access-list 11 deny 239.0.0.0 0.255.255.255
access-list 11 permit 224.0.0.0 15.255.255.255
R4#
The Solution Script says:
R4:
interface Ethernet0/0
ip multicast boundary 51
!
access-list 51 deny 239.0.0.0 0.255.255.255
access-list 51 permit 224.0.0.0 15.255.255.255
Can someone explain the difference?
Thanks /Pradeep
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