07-06-2009 09:39 AM - edited 03-06-2019 06:36 AM
Hi, can you clarify this;when I do on my L3 switch:
'show ip pim autorp' I do not see any rp listed.
Then if I do 'show ip pim rp' I see rp's listed.
On the respective L3 switch, I do not see any rp listed manually.
Question:How are RP's being detected in this case? If it is via 'autoRP', why the command show ip pim autorp does not show any rp listed then?
switch1#show ip pim bsr-router
PIMv2 Bootstrap information
switch1#show ip pim rp
Group: 239.254.3.11 **
Group: 239.254.3.3
Group: 239.254.34.4
Group: 239.254.3.23
Group: 239.254.34.3
** note:edited numbers.
switch1#show ip pim autorp
AutoRP Information:
AutoRP is enabled.
PIM AutoRP Statistics: Sent/Received
RP Announce: 0/0, RP Discovery: 0/0
switch1#
This is the configuration on the L3 switches. I do not see any mention of manual RP configuration.
(...)
ip muticast-routing distributed
ip multicast multipath
ip multicast rpf interval 1
ip multicast rpf backoff 100 100
ip igmp ssm-map enable
ip igmp ssm-map static list 9.3.3.5
(...)
Solved! Go to Solution.
07-07-2009 05:18 AM
That's correct. Pay close attention to the Flags on the right.
'sTI' means the Mcast groups are running on SSM
You also notice, there aren't any *,G joins as the receivers are sending S,G joins since they know which source they want to receive the Mcast data from.
HTH,
__
Edison.
07-06-2009 09:48 AM
Based on the portion of your config, you are using SSM (Source Specific Multicast), thus the sources and receivers know where to go hence no need for RP.
If you post the 'show ip mroute' more information regarding the groups can be illustrated.
HTH,
__
Edison.
07-06-2009 12:55 PM
Try the command 'show ip pim rp mapping'. This should show you what RP's are handling what multicast groups and how this mapping was learned - i.e. static config, auto-rp or bsr.
HTH
Andy
07-06-2009 06:49 PM
Here it is. I noticed that 'show ip pim rp map' did not list anything. So it means there are no RP's, since we are using static sm, correct?
l3-switch#show ip pim rp map
PIM Group-to-RP Mappings
l3-switch#show ip mroute
IP Multicast Routing Table
Flags: D - Dense, S - Sparse, B - Bidir Group, s - SSM Group, C - Connected,
L - Local, P - Pruned, R - RP-bit set, F - Register flag,
!** output supressed for simplicity
Outgoing interface flags: H - Hardware switched, A - Assert winner
Timers: Uptime/Expires
Interface state: Interface, Next-Hop or VCD, State/Mode
(10.1.37.2, 239.254.13.33), 4w4d/00:02:59, flags: sTI
Incoming interface: GigabitEthernet1/0/3, RPF nbr 10.1.40.17
Outgoing interface list:
Vlan306, Forward/Sparse, 4w4d/00:02:48
(10.1.37.3, 239.254.13.12), 4w4d/00:02:59, flags: sTI
Incoming interface: GigabitEthernet1/0/2, RPF nbr 10.1.40.17
Outgoing interface list:
Vlan306, Forward/Sparse, 3w4d/00:02:41
(...)
07-07-2009 05:18 AM
That's correct. Pay close attention to the Flags on the right.
'sTI' means the Mcast groups are running on SSM
You also notice, there aren't any *,G joins as the receivers are sending S,G joins since they know which source they want to receive the Mcast data from.
HTH,
__
Edison.
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