Multicast Auto-RP question

From: Hunt Lee (ciscoforme3@yahoo.com.au)
Date: Tue Nov 26 2002 - 08:41:08 GMT-3

Hi,

I have used Auto-AR for a multicast PIM-SM network.

                   RTB --------- RTE
                  / \ \
10.1.1.88/24 - RTA RTD ------- 2924 switch ---- 10.1.2.113/24
 (source) \ / (member)
                   RTC

Both RTC (10.224.1.1) & RTB (10.224.1.2) are the candidate RPs, while RTD is the
mapping agent (10.224.1.3). The entire multicast domain is configured with OSPF.

The multicast group traffic is 228.13.20.216

What I'm very confused is that does RTA needs a RP?? Since it is not getting any on
the moment.

RTA#sh ip pim rp mapping
PIM Group-to-RP Mappings

RTA#

RTB#sh ip pim rp
Group: 228.13.20.216, RP: 10.224.1.2, v2, v1, uptime 00:37:04, expires 00:03:26

RTB#sh ip pim rp mapping
PIM Group-to-RP Mappings
This system is an RP (Auto-RP)

Group(s) 224.0.0.0/4
  RP 10.224.1.2 (?), v2v1
    Info source: 10.224.1.3 (?), elected via Auto-RP
         Uptime: 00:33:07, expires: 00:02:37
RTB#

And RTC says the Group-to-RP mappings is not active, is this normal??

RTC#sh ip pim rp
RTC#

RTC#sh ip pim rp mapping
PIM Group-to-RP Mappings
This system is an RP (Auto-RP)

Group(s) 224.0.0.0/4
  RP 10.224.1.2 (?), v2v1
    Info source: 10.224.1.3 (?), elected via Auto-RP
         Uptime: 00:36:02, expires: 00:02:43
RTC#

RTD & RTE can see the RP fine (same output as RTB above).

I have also attached the Multicast Forward tables

RTA#sh 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,
       T - SPT-bit set, J - Join SPT, M - MSDP created entry,
       X - Proxy Join Timer Running, A - Candidate for MSDP Advertisement,
       U - URD, I - Received Source Specific Host Report, s - SSM
Outgoing interface flags: H - Hardware switched
Timers: Uptime/Expires
Interface state: Interface, Next-Hop or VCD, State/Mode

(*, 228.13.20.216), 00:03:14/00:02:59, RP 0.0.0.0, flags: DP
  Incoming interface: Null, RPF nbr 0.0.0.0
  Outgoing interface list: Null

(10.1.1.88, 228.13.20.216), 00:03:14/00:02:38, flags: PT
  Incoming interface: Ethernet0, RPF nbr 0.0.0.0
  Outgoing interface list: Null

(*, 224.0.1.39), 00:37:32/00:02:59, RP 0.0.0.0, flags: DP
  Incoming interface: Null, RPF nbr 0.0.0.0
  Outgoing interface list: Null

(10.224.1.1, 224.0.1.39), 00:02:33/00:00:26, flags: PT
  Incoming interface: Serial0, RPF nbr 10.2.2.2
  Outgoing interface list: Null

(10.224.1.2, 224.0.1.39), 00:01:17/00:01:42, flags: PT
  Incoming interface: Serial1, RPF nbr 10.2.1.2
  Outgoing interface list: Null

(*, 224.0.1.40), 00:38:13/00:00:00, RP 0.0.0.0, flags: DCL
  Incoming interface: Null, RPF nbr 0.0.0.0
  Outgoing interface list:
    Serial0, Forward/Sparse, 00:32:46/00:00:15

RTA#

RTB#sh 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,
       T - SPT-bit set, J - Join SPT, M - MSDP created entry,
       X - Proxy Join Timer Running, A - Candidate for MSDP Advertisement,
       U - URD, I - Received Source Specific Host Report, s - SSM
Outgoing interface flags: H - Hardware switched
Timers: Uptime/Expires
Interface state: Interface, Next-Hop or VCD, State/Mode

(*, 228.13.20.216), 00:44:52/00:03:11, RP 10.224.1.2, flags: S
  Incoming interface: Null, RPF nbr 0.0.0.0
  Outgoing interface list:
    Serial1/2, Forward/Sparse, 00:44:52/00:03:11

(*, 224.0.1.39), 01:45:37/00:02:59, RP 0.0.0.0, flags: DP
  Incoming interface: Null, RPF nbr 0.0.0.0
  Outgoing interface list: Null

(10.224.1.1, 224.0.1.39), 00:00:09/00:02:50, flags: PT
  Incoming interface: Serial1/0, RPF nbr 10.2.4.1
  Outgoing interface list: Null

(10.224.1.2, 224.0.1.39), 00:02:53/00:00:06, flags: PT
  Incoming interface: Loopback0, RPF nbr 0.0.0.0
  Outgoing interface list: Null

(*, 224.0.1.40), 01:46:40/00:00:00, RP 0.0.0.0, flags: DCL
  Incoming interface: Null, RPF nbr 0.0.0.0
  Outgoing interface list:
    Loopback0, Forward/Sparse, 01:46:40/00:02:15

(10.224.1.3, 224.0.1.40), 00:45:11/00:02:53, flags: CLT
  Incoming interface: Serial1/0, RPF nbr 10.2.4.1
  Outgoing interface list:
    Loopback0, Forward/Sparse, 00:45:11/00:02:15

RTB#

RTC#sh 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,
       T - SPT-bit set, J - Join SPT, M - MSDP created entry,
       X - Proxy Join Timer Running, A - Candidate for MSDP Advertisement,
       U - URD, I - Received Source Specific Host Report, s - SSM
Outgoing interface flags: H - Hardware switched
Timers: Uptime/Expires
Interface state: Interface, Next-Hop or VCD, State/Mode

(*, 224.0.1.39), 00:59:41/00:02:59, RP 0.0.0.0, flags: DP
  Incoming interface: Null, RPF nbr 0.0.0.0
  Outgoing interface list: Null

(10.224.1.1, 224.0.1.39), 00:01:58/00:01:01, flags: PT
  Incoming interface: Loopback0, RPF nbr 0.0.0.0
  Outgoing interface list: Null

(10.224.1.2, 224.0.1.39), 00:01:41/00:01:18, flags: PT
  Incoming interface: Serial1, RPF nbr 10.2.3.2
  Outgoing interface list: Null

(*, 224.0.1.40), 01:00:46/00:00:00, RP 0.0.0.0, flags: DCL
  Incoming interface: Null, RPF nbr 0.0.0.0
  Outgoing interface list:
    Loopback0, Forward/Sparse, 01:00:47/00:02:09

(10.224.1.3, 224.0.1.40), 00:46:00/00:02:05, flags: CLT
  Incoming interface: Serial1, RPF nbr 10.2.3.2
  Outgoing interface list:
    Loopback0, Forward/Sparse, 00:46:00/00:02:09

RTC#

RTD#sh 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,
       T - SPT-bit set, J - Join SPT, M - MSDP created entry,
       X - Proxy Join Timer Running, A - Candidate for MSDP Advertisement,
       U - URD, I - Received Source Specific Host Report, s - SSM
Outgoing interface flags: H - Hardware switched
Timers: Uptime/Expires
Interface state: Interface, Next-Hop or VCD, State/Mode

(*, 228.13.20.216), 00:46:34/00:02:19, RP 10.224.1.2, flags: SP
  Incoming interface: Serial0/1, RPF nbr 10.2.4.2
  Outgoing interface list: Null

(*, 224.0.1.39), 00:47:30/00:00:00, RP 0.0.0.0, flags: DCL
  Incoming interface: Null, RPF nbr 0.0.0.0
  Outgoing interface list:
    Loopback0, Forward/Sparse, 00:47:30/00:02:22
    Serial0/0, Forward/Sparse, 00:47:30/00:00:29
    Serial0/1, Forward/Sparse, 00:47:30/00:00:29

(10.224.1.1, 224.0.1.39), 00:46:29/00:02:29, flags: CLT
  Incoming interface: Serial0/0, RPF nbr 10.2.3.1
  Outgoing interface list:
    Loopback0, Forward/Sparse, 00:46:31/00:02:20
    Serial0/1, Forward/Sparse, 00:46:31/00:01:29

(10.224.1.2, 224.0.1.39), 00:46:14/00:02:45, flags: CLT
  Incoming interface: Serial0/1, RPF nbr 10.2.4.2
  Outgoing interface list:
    Loopback0, Forward/Sparse, 00:46:14/00:02:20
    Serial0/0, Forward/Sparse, 00:46:14/00:01:46

(*, 224.0.1.40), 00:47:32/00:00:00, RP 0.0.0.0, flags: DCL
  Incoming interface: Null, RPF nbr 0.0.0.0
  Outgoing interface list:
    Loopback0, Forward/Sparse, 00:47:32/00:02:21

(10.224.1.3, 224.0.1.40), 00:46:31/00:02:32, flags: PCLT
  Incoming interface: Loopback0, RPF nbr 0.0.0.0
  Outgoing interface list: Null

RTD#

RTE#sh 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,
       T - SPT-bit set, J - Join SPT, M - MSDP created entry,
       X - Proxy Join Timer Running, A - Candidate for MSDP Advertisement,
       U - URD, I - Received Source Specific Host Report, s - SSM
Outgoing interface flags: H - Hardware switched
Timers: Uptime/Expires
Interface state: Interface, Next-Hop or VCD, State/Mode

(*, 228.13.20.216), 00:29:03/00:02:51, RP 10.224.1.2, flags: SJC
  Incoming interface: Serial0, RPF nbr 10.2.5.2
  Outgoing interface list:
    Ethernet0, Forward/Sparse, 00:29:03/00:02:52

(*, 224.0.1.39), 01:46:34/00:02:59, RP 0.0.0.0, flags: DC
  Incoming interface: Null, RPF nbr 0.0.0.0
  Outgoing interface list:
    Ethernet0, Forward/Sparse, 01:46:31/00:02:46

(10.224.1.2, 224.0.1.39), 00:02:47/00:00:12, flags: CT
  Incoming interface: Serial0, RPF nbr 10.2.5.2
  Outgoing interface list:
    Ethernet0, Forward/Sparse, 00:02:48/00:02:45

(*, 224.0.1.40), 01:47:18/00:00:00, RP 0.0.0.0, flags: DCL
  Incoming interface: Null, RPF nbr 0.0.0.0
  Outgoing interface list:
    Ethernet0, Forward/Sparse, 01:47:18/00:00:00
    Serial0, Forward/Sparse, 00:29:07/00:00:00

(10.224.1.3, 224.0.1.40), 00:47:28/00:02:59, flags: CLT
  Incoming interface: Ethernet0, RPF nbr 10.1.2.1
  Outgoing interface list:
    Serial0, Forward/Sparse, 00:29:59/00:00:00

RTE# 

-- 
Thanks
ciscoforme3@yahoo.com.au

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