Interface Access List and Multicast Boundary List

[frankbr77]

Just a quick question if I configure an ACL on an interface and a boundary list on the same interface will the interface ACL override the boundary ACL?  For example.

access list 101 permit tcp any any eq 443

access list 101 deny any

access list 99 permit host 226.10.10.10

acesss list 99 deny any

interface fa0/0

ip add 10.1.1.1 255.255.255.252

ip access-group 101 out

ip multicast boundary 99

With this would i essentially deny all multicast?

[Giuseppe Larosa · Accepted solution]

Hello Frank,

your understanding is correct only multicast packets locally generated like an OSPF hello can be sent out this interface

so you need to modify ACL 101 or  to use a different one in order to allow multicast packets to be forwarded out this interface

the boundary ACL does a different job deciding which multicast streams can have the interface in their outgoing interface list.

see

http://www.cisco.com/en/US/docs/ios/ipmulti/command/reference/imc_03.html#wp1068105

Hope to help

Giuseppe