07-19-2007 08:19 AM - edited 03-05-2019 05:23 PM
Hello,
I'm searching for some hints on configuring multicast routing. Especially to get applications like apple's iChat (MDNS / 224.0.0.251) running over ip network borders. I have a catalyst 3560 with c3560-ipservices-mz.122-25.SED1.bin which should act as (multicast) router.
I have tried configuraions like:
ip multicast-routing distributed
!
interface Vlan1
ip address 192.168.1.1 255.255.255.0
ip pim [dense-mode | sparse-mode | sparse-dense-mode]
!
interface Vlan2
ip address 192.168.2.1 255.255.255.0
ip pim [dense-mode | sparse-mode | sparse-dense-mode]
!
[ip pim rp-address 192.168.1.1]
!
but without any success.
Could someone of you be so kind and give me a hint or point me in the right direction.
thanks in advance and kind regards
Mark
07-22-2007 09:35 AM
Try by following two commands
ip pim accept-rp {address | auto-rp} [group-access-list-number]
ip pim message-interval seconds
Regards,
Dharmesh Purohit
07-23-2007 11:39 PM
Thanks for your response. I tried the command
ip pim accept-rp {address | auto-rp} [group-access-list-number]
but without success. The onther command you mentioned isn't supported in the IOS version I use.
But I think I know now why mDNS (224.0.0.251) packets are not forewarded. At
http://www.iana.org/assignments/multicast-addresses
it is said that multicast datagrams with addresses within 224.0.0.0 to 224.0.0.255 should not be forwarded by multicast routers.
regards
Mark
02-05-2011 12:37 PM
I know its a very very long time since this thread was started.
I just sah the following on IANA.ORG.
Last Updated
2011-01-31
Note
Host Extensions for IP Multicasting [RFC1112] specifies the extensions
required of a host implementation of the Internet Protocol (IP) to
support multicasting. The multicast addresses are in the range
224.0.0.0 through 239.255.255.255. Address assignments are listed below.
The range of addresses between 224.0.0.0 and 224.0.0.255, inclusive,
is reserved for the use of routing protocols and other low-level
topology discovery or maintenance protocols, such as gateway discovery
and group membership reporting. Multicast routers should not forward
any multicast datagram with destination addresses in this range,
regardless of its TTL.
Regards
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