From: Hobbs (deadheadblues@gmail.com)
Date: Wed Oct 08 2008 - 20:38:10 ART
This is not a bug as far as I am concerned, this the correct behavior. There
is a difference between "receiving and processing" a multicast packet (such
as an rp announce or rp discovery) and "forwarding" a multicast packet. If
the routers are directly connect to an MA, they can learn the rp mappings as
long as the have pim enabled on the interface connected to the MA.
There is also a difference from these and "generating" the multicast packet,
which doesn't not need dense more or an rp to send the packet. This is the
exact behavior we see when we send multicast pings. That router only needs
to have PIM on the interface.
On Wed, Oct 8, 2008 at 4:45 PM, Andrew Dempsey <apdccie@gmail.com> wrote:
> I have not "labbed" this specifically but I have ran into this in my lab
> while just messing around. I was running 12.4 code at the time but must
> apologize as I can't say with certainty the exact code. I saw the same
> thing you are seeing that direct adjacencies with the MA receive, but other
> routers do not. I equated it to an IOS bug and moved on, I am interested
> now as to what the actual answer is.
>
> On Wed, Oct 8, 2008 at 6:25 PM, Chuck Ryan (chryan) <chryan@cisco.com>wrote:
>
>> and here are the configs that I promised.....
>>
>> Here are the configs for each:
>>
>> BB1#sh config
>> Using 1346 out of 8192 bytes
>> !
>> version 12.4
>> service timestamps debug datetime msec
>> service timestamps log datetime msec
>> no service password-encryption
>> !
>> hostname BB1
>> !
>> boot-start-marker
>> boot-end-marker
>> !
>> !
>> no aaa new-model
>> ip source-route
>> !
>> !
>> ip cef
>> ip multicast-routing
>> no ipv6 cef
>> !
>> !
>> !
>> interface Loopback0
>> ip address 11.11.11.11 255.255.255.255
>> ip pim sparse-mode
>> !
>> interface Ethernet0/0
>> ip address 10.1.37.7 255.255.255.0
>> ip pim sparse-mode
>> !
>> interface Ethernet0/1
>> no ip address
>> shutdown
>> !
>> interface Ethernet0/2
>> no ip address
>> shutdown
>> !
>> interface Ethernet0/3
>> no ip address
>> shutdown
>> !
>> interface Serial1/0
>> no ip address
>> shutdown
>> serial restart-delay 0
>> !
>> interface Serial1/1
>> no ip address
>> shutdown
>> serial restart-delay 0
>> !
>> interface Serial1/2
>> no ip address
>> shutdown
>> serial restart-delay 0
>> !
>> interface Serial1/3
>> no ip address
>> shutdown
>> serial restart-delay 0
>> !
>> router ospf 1
>> router-id 11.11.11.11
>> log-adjacency-changes
>> network 10.1.37.7 0.0.0.0 area 0
>> network 11.11.11.11 0.0.0.0 area 0
>> !
>> ip forward-protocol nd
>> !
>> !
>> no ip http server
>> ip pim send-rp-announce Loopback0 scope 16
>> !
>> !
>> !
>> !
>> line con 0
>> logging synchronous
>> line aux 0
>> line vty 0 4
>> login
>> !
>> end
>>
>> BB1#
>> ----------------------------------------------------
>>
>> R3#show config
>> Using 1341 out of 8192 bytes
>> !
>> version 12.4
>> service timestamps debug datetime msec
>> service timestamps log datetime msec
>> no service password-encryption
>> !
>> hostname R3
>> !
>> boot-start-marker
>> boot-end-marker
>> !
>> !
>> no aaa new-model
>> !
>> !
>> ip cef
>> ip multicast-routing
>> no ipv6 cef
>> !
>> !
>> interface Loopback0
>> ip address 3.3.3.3 255.255.255.255
>> ip pim sparse-mode
>> !
>> interface Ethernet0/0
>> ip address 10.1.37.3 255.255.255.0
>> ip pim sparse-mode
>> !
>> interface Ethernet0/1
>> no ip address
>> shutdown
>> !
>> interface Ethernet0/2
>> no ip address
>> shutdown
>> !
>> interface Ethernet0/3
>> no ip address
>> shutdown
>> !
>> interface Serial1/0
>> no ip address
>> shutdown
>> serial restart-delay 0
>> !
>> interface Serial1/1
>> no ip address
>> shutdown
>> serial restart-delay 0
>> !
>> interface Serial1/2
>> ip address 150.1.13.3 255.255.255.0
>> ip pim sparse-mode
>> serial restart-delay 0
>> !
>> interface Serial1/3
>> no ip address
>> shutdown
>> serial restart-delay 0
>> !
>> router ospf 1
>> router-id 3.3.3.3
>> log-adjacency-changes
>> network 3.3.3.3 0.0.0.0 area 0
>> network 10.1.37.3 0.0.0.0 area 0
>> network 150.1.13.3 0.0.0.0 area 0
>> !
>> ip forward-protocol nd
>> !
>> !
>> no ip http server
>> !
>> !
>> line con 0
>> logging synchronous
>> line aux 0
>> line vty 0 4
>> login
>> !
>> end
>>
>> R3#
>> -----------------------------------------------------
>>
>> R1#sh config
>> Using 1601 out of 8192 bytes
>> !
>> version 12.4
>> service timestamps debug datetime msec
>> service timestamps log datetime msec
>> no service password-encryption
>> !
>> hostname R1
>> !
>> boot-start-marker
>> boot-end-marker
>> !
>> !
>> no aaa new-model
>> !
>> !
>> ip cef
>> ip multicast-routing
>> no ipv6 cef
>> !
>> !
>> interface Loopback0
>> ip address 1.1.1.1 255.255.255.255
>> ip pim sparse-mode
>> !
>> interface Ethernet0/0
>> ip address 150.1.15.1 255.255.255.0
>> ip pim sparse-mode
>> !
>> interface Ethernet0/1
>> no ip address
>> shutdown
>> !
>> interface Ethernet0/2
>> no ip address
>> shutdown
>> !
>> interface Ethernet0/3
>> no ip address
>> shutdown
>> !
>> interface Serial1/0
>> no ip address
>> encapsulation frame-relay
>> serial restart-delay 0
>> no frame-relay inverse-arp
>> !
>> interface Serial1/0.1 point-to-point
>> ip address 150.1.12.1 255.255.255.0
>> snmp trap link-status
>> frame-relay interface-dlci 102
>> !
>> interface Serial1/1
>> ip address 150.1.13.1 255.255.255.0
>> ip pim sparse-mode
>> serial restart-delay 0
>> !
>> interface Serial1/2
>> no ip address
>> shutdown
>> serial restart-delay 0
>> !
>> interface Serial1/3
>> no ip address
>> shutdown
>> serial restart-delay 0
>> !
>> router ospf 1
>> router-id 1.1.1.1
>> log-adjacency-changes
>> network 1.1.1.1 0.0.0.0 area 0
>> network 150.1.12.1 0.0.0.0 area 0
>> network 150.1.13.1 0.0.0.0 area 0
>> network 150.1.15.1 0.0.0.0 area 0
>> !
>> ip forward-protocol nd
>> !
>> !
>> no ip http server
>> ip pim send-rp-discovery Loopback0 scope 16
>> !
>> !
>> line con 0
>> logging synchronous
>> line aux 0
>> line vty 0 4
>> login
>> !
>> end
>>
>> R1#
>>
>> Thanks,
>>
>> Chuck
>>
>>
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