From: Lee Carter (l2carter@yahoo.com)
Date: Sat Jun 11 2005 - 12:07:16 GMT-3
All,
In looking at univercd documentation to configure stub
multicast routing use:
router a... Stub Host or end node
routera(config)# ip multicast-routing
routera(config)# interface ethernet0
routera(config)# description Connection to hosts
routera(config-if)# ip address 10.0.1.1 255.255.255.0
routera(config-if)# ip pim dense-mode
routera(conifg-if)# ip igmp helper-address 10.0.0.2
routera(config)# interface ethernet1
routera(config)# ip addres 10.0.1.1 255.255.255.0
routera(config)# ip pim dense-mode
routera(config)# description to Multicast Rotuer
router b... Real Multicast router
routerb(config)# ip multicast-routing
routerb(config)# access-list 1 deny 10.0.0.1
routerb(config)# interface ethernet 1
routerb(config-if)# ip address 10.0.0.2 255.255.255.0
routerb(config-if)# ip pim dense-mode
routerb(config-if)# ip pim neighbor-filter 1
routerb(config-if)# description To Stub router
My question is on Routerb's configuration...
If I use ACL 1 which is deny host 10.0.0.1 but don't
permit anyting else (per the documentation on
univercd) what will be allowed throubh the neighbor
filter? If nothing.. they why not make the ACL deny
any?
Also,
Does igmp helper-addresses work similar to ip helper
addresses in that the interface that is configured
with the helper command will appear as the source when
fowarding the broadcast (multicast in this example)?
If so, then it appears that the point is to say stub
multicast routing is really not making a peer with
your directly connected router and insted to some
router(s) on links not directly attached which I would
then think the neighbor-filter would need a permit any
after the deny host 10.0.0.1...
Thoughts?
Link for their configuration (near bottom).
http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122cgcr/fipr_c/ipcpt3/1cfmulti.htm#wp1003543
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