Hello,
When it comes to filter AutoRP announcement, there is 3 ways that usually
comes to mind :
1 ACL on autorp messages applied inbound on neighbors
access-list 100 deny ip any host 224.0.1.39
access-list 100 deny ip any host 224.0.1.40
access-list 100 permit ip any any
interface ethernet 0/0
ip access-group 100 in
2 Filtering annoucements for all groups
access-list 10 deny 224.0.0.0 15.255.255.255
access-list 10 permit any
interface ethernet 0/0
ip multicast boundary 10 filter-auto-rp
3 Filtering the multicast groups for AutoRP messages
access-list 10 deny 224.0.1.39
access-list 10 deny 224.0.1.40
access-list 10 permit any
interface ethernet 0/0
ip multicast boundary 10
In Volume 3 Lab 4 task 4.1, the solution 1 with ACL is applied BUT on the
Auto-RP itself and outbound. How can it works as outbound ACL doesn't filter
traffic from the router itself ??
Labing it on dynamips IOS v12.4(15)T14 I confirm there is no match on the
ACL applied inbound and the solution is not working. However on Proctorlab
rack the outbound ACL match and the autorp is well filtered.
Is it an IOS version thing ? and what the nomal behavior ?
thanks for your answers
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