From: Daniel Kutchin (daniel@kutchin.com)
Date: Mon Feb 09 2009 - 21:43:39 ARST
On the interfaces b/w R1 and R2 (i.e. R2 as well) add:
ip broadcast-address 192.168.12.255
ip directed-broadcast
-
Daniel
-----Original Message-----
From: Hobbs [mailto:deadheadblues@gmail.com]
Sent: Dienstag, 10. Februar 2009 00:28
To: Daniel Kutchin
Cc: Cisco certification
Subject: Re: Testing Multicast Helper-Map with IP SLA
Thank you Daniel,
IP SLA does not allow 255.255.255.255 on the IOS I have. I think it
was allowed on older codes that had the rtr commands (I read an
example from an IE blog that used the all 1's address). I originally
had tried 192.168.12.255 and it did not work so that is why I changed
it to 192.168.45.255. I have gone back to 12.255 now...
I get hits on my ACL:
R2#show access-lists
Extended IP access list 100
10 permit udp any host 192.168.12.255 eq 4000 (72 matches)
But the conversion is not happening, I don't show anything for group
239.0.0.1 in the mroute table and none of the packets get past R2 now.
I have verified that R2, R3, and R4 are PIM neighbors.
Has anyone done a scenario like this?
thanks,
On Mon, Feb 9, 2009 at 3:54 PM, Daniel Kutchin <daniel@kutchin.com> wrote:
> First error that I spotted,
>
>> R1 has the following IP SLA config:
>>
>> ip sla monitor 1
>> type udpEcho dest-ipaddr 192.168.45.255 dest-port 4000 control disable
> ^^
> Should be:
> type udpEcho dest-ipaddr 192.168.12.255 dest-port 4000 control disable
> ^^
>
> Then on R1, the interface linking R1 and R2, add
> int S0/0
> desc #- Link R1->R2 --
> ip broadcast-address 192.168.12.255
> ip directed-broadcast
>
> or
>
> You could simply use on R1
>
> type udpEcho dest-ipaddr 255.255.255.255 dest-port 4000 control disable
>
> and
>
> ip directed-broadcast
>
>
>
> ---
>
> Daniel
>
>
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> Hobbs
> Sent: Montag, 9. Februar 2009 23:09
> To: Cisco certification
> Subject: Testing Multicast Helper-Map with IP SLA
>
> Hello,
>
> I am trying to get multicast helper-map to work (using SLA for
> testing) but having issues. My first hope router is not converting
> broadcast to multicast.
>
> Topology:
>
> R1---R2---R3---R4---R5
>
> R1-R2: 192.168.12.0/24
> R2-R3: 192.168.23.0/24
> R3-R4: 192.168.34.0/24
> R4-R5: 192.168.45.0/24
>
> IP Multicast-routing is enabled.
> PIM-DM on all interfaces of R2,R3 and R4.
> All Routes are known via OSPF.
>
> R1 has the following IP SLA config:
>
> ip sla monitor 1
> type udpEcho dest-ipaddr 192.168.45.255 dest-port 4000 control disable
> frequency 5
> ip sla monitor schedule 1 life forever start-time now
>
> R2 has the "First Hop" helper config:
>
> ip forward-protocol udp 4000
> access-list 100 permit udp host 192.168.12.1 host 192.168.45.255 eq 4000
> interface Serial1/1
> ip address 192.168.12.2 255.255.255.0
> ip pim dense-mode
> ip multicast helper-map broadcast 239.0.0.1 100
>
> R4 has the "Last Hop" help config:
>
> ip forward-protocol udp 4000
> access-list 100 permit udp host 192.168.12.1 any eq 4000
> interface Serial1/1
> description to R3
> ip address 192.168.34.4 255.255.255.0
> ip pim dense-mode
> ip multicast helper-map 239.0.0.1 192.168.45.255 100
>
> interface Serial1/0
> description to R5
> ip address 192.168.45.4 255.255.255.0
> ip directed-broadcast
>
> R5 has ip sla monitor responder
>
> I am capturing packets and when R4 gets the packets from R3, they
> still have the destination of 192.168.45.255, which means the problem
> is on R2.
>
> In fact, if I debug ip packet on R2 I see this:
>
> *Mar 7 00:05:32.840: IP: s=192.168.12.1 (Serial1/1), d=192.168.45.255
> (Serial1/0), g=192.168.23.3, len 44, forward
> *Mar 7 00:05:32.844: UDP src=50398, dst=4000
>
> But the ACL shows no hits:
>
> R2#sho access-lists
> Extended IP access list 100
> 10 permit udp host 192.168.12.1 host 192.168.45.255 eq 4000
>
>
> Can you seen any issues with this configuration?
>
>
> thank you,
>
>
> Blogs and organic groups at http://www.ccie.net
>
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>
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