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IGMP V3, SSM Multicast Boundaries config questions..

Guys,

I am having some difficulty to understand the SSM boundary config sample from this Cisco doco.

eg 1, I am not sure why they have the host 0.0.0.0 line. Also the acl are base on ip, udp and igmp?

Eg 2, similar to eg 1 but it also has deny pim.

Could someone explain why do we need to use udp, pim & igmp for the boundery filter? Normally I would use ip instead. (eg: permit ip host 181.1.2.201 host 232.1.1.1)

eg 1:

The following example permits outgoing traffic for (181.1.2.201, 232.1.1.1) and (181.1.2.202, 232.1.1.1) and denies all other (S,G)s.

configure terminal

!

ip access-list extended acc_grp1

permit ip host 0.0.0.0 232.1.1.1 0.0.0.255

permit ip host 181.1.2.201 host 232.1.1.1

permit udp host 181.1.2.202 host 232.1.1.1

permit ip host 181.1.2.202 host 232.1.1.1

deny igmp host 181.2.3.303 host 232.1.1.1

!

interface ethernet 2/3

ip multicast boundary acc_grp1 out

!

eg 2:

The following example permits outgoing traffic for (181.1.2.201, 232.1.1.5) and 181.1.2.202, 232.1.1.5).

configure terminal

!

ip access-list extended acc_grp6

permit ip host 0.0.0.0 232.1.1.1 5.0.0.255

deny udp host 181.1.2.201 host 232.1.1.5

permit ip host 181.1.2.201 host 232.1.1.5

deny pim host 181.1.2.201 host 232.1.1.5

permit ip host 181.1.2.202 host 232.1.1.5

deny igmp host 181.2.3.303 host 232.1.1.1

!

interface ethernet 2/3

ip multicast boundary acc_grp6 out

!

Cisco Doco:

http://www.cisco.com/univercd/cc/td/doc/product/software/ios124/124cg/himc_c/chap05/hmcbnd.htm

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Re: IGMP V3, SSM Multicast Boundaries config questions..

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