From: Hunt Lee (huntl@webcentral.com.au)
Date: Tue Nov 26 2002 - 23:46:52 GMT-3
Hi folks, question for you...
this is the topology:
RTB --------- RTE
/ \ \
10.1.1.88/24 - RTA RTD ------- 2924 switch ---- 10.1.2.113/24
(source) \ / (member)
RTC
I have used Auto-RP for a multicast PIM-SM network. 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 advertised with OSPF.
The multicast group traffic is 228.13.20.216
question is:
What I'm very confused is that why doesn't RTA gets a RP at all?? The
interface command "ip pim sparse-mode" has been used on all interfaces for
all the routers, including RTA.
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#
i'm little bit confused...
any help appreciated...
thanks
Hunt
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