From: my-ccie-test@libero.it
Date: Wed Feb 01 2006 - 06:42:46 GMT-3
Hi all,
I did a multicast lab and I had an unexpected behavior on auto-rp configuration.
the target of the lab was to check the behavior of auto-rp in a pim sparse-mode cloud and add the command auto-rp listener to work with a auto-rp rp and a sparse-mode cloud.
So teh steps of this lab are:
1) configure sparse-mode cloud with a static rp
2) join the group 239.0.0.1 on one router and source this gorup from another router, check if the joining router respond to a ping.
3) delete static rp and configure auto-rp, leave the cloud pim sparse-mode
4) make a ping from a source to 239.0.0.1, the expected beahvior is that no router respond to the ping.
5) configure auto-rp listener on all routers and repeat the ping.
I did not arive at step 5 because I had an unexpected result on step 4.
infact, when I did a ping with auto-rp in pim sparse-mode cloud, the ping was successfull!!!
I thought the auto-rp requires only sparse-dense-mode cloud...
checking the mroute table on all routers all work fine.
any thoughts?
thanks in advance
Max
here are the network and config.
|---r2
r5----r3----|
|---r1
r3 is the rp
r5 is the source of 239.0.0.1
r1 join the group 239.0.0.1
there is only one strange message I received on all routers is
17:37:19: %PIM-6-INVALID_RP_JOIN: Received (*, 224.0.1.40) Join from 10.0.2.2 for invalid RP 10.0.0.101
here are the config
--------------------------------------------
r5
interface Loopback0
ip address 10.0.0.101 255.255.255.252
ip pim sparse-mode
!
!
interface FastEthernet0/0
ip address 10.10.10.5 255.255.255.0
ip pim sparse-mode
duplex full
speed 100
!
---------------------------------------------
r3
!
interface Loopback0
ip address 9.9.9.3 255.255.255.255
no ip directed-broadcast
ip pim sparse-mode
!
!
interface Ethernet0
ip address 10.10.10.3 255.255.255.0
no ip directed-broadcast
ip pim sparse-mode
media-type 10BaseT
!
!
interface Ethernet3
ip address 10.0.2.3 255.255.254.0
no ip directed-broadcast
ip pim sparse-mode
media-type 10BaseT
!
ip pim send-rp-announce Loopback0 scope 255 group-list 1
ip pim send-rp-discovery Loopback0 scope 255
!
access-list 1 permit 239.0.0.0 0.255.255.255
!
-------------------------------------------------------------------
r2
!
interface Loopback0
ip address 9.9.9.2 255.255.255.255
no ip directed-broadcast
ip pim sparse-mode
!
!
interface Ethernet0/0
ip address 10.0.2.2 255.255.254.0
no ip directed-broadcast
ip pim sparse-mode
!
--------------------------------------------------------------------
r1
!
interface Loopback1
ip address 10.0.255.1 255.255.255.255
no ip directed-broadcast
ip pim sparse-mode
ip igmp join-group 239.0.0.1
!
!
interface Ethernet1/1
ip address 10.0.2.1 255.255.254.0
no ip directed-broadcast
ip pim sparse-mode
!
----------------------------------------------------------------------
ping from r5 to 239.0.0.1
r5#p 239.0.0.1
Type escape sequence to abort.
Sending 1, 100-byte ICMP Echos to 239.0.0.1, timeout is 2 seconds:
Reply to request 0 from 10.0.2.1, 4 ms
Reply to request 0 from 10.0.2.1, 4 ms
r5#
show ip mroute on r5
r5#sh ip mroute
IP Multicast Routing Table
Flags: D - Dense, S - Sparse, 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
Outgoing interface flags: H - Hardware switched
Timers: Uptime/Expires
Interface state: Interface, Next-Hop or VCD, State/Mode
(*, 224.0.1.39), 01:11:40/00:02:59, RP 0.0.0.0, flags: DJC
Incoming interface: Null, RPF nbr 0.0.0.0
Outgoing interface list:
FastEthernet0/0, Forward/Sparse, 01:11:40/00:02:47
(9.9.9.3, 224.0.1.39), 00:02:35/00:00:24, flags: PCT
Incoming interface: FastEthernet0/0, RPF nbr 10.10.10.3
Outgoing interface list: Null
(*, 224.0.1.40), 01:11:48/00:00:00, RP 0.0.0.0, flags: DJCL
Incoming interface: Null, RPF nbr 0.0.0.0
Outgoing interface list:
Loopback0, Forward/Sparse, 01:11:48/00:02:25
FastEthernet0/0, Forward/Sparse, 01:11:48/00:02:41
(9.9.9.3, 224.0.1.40), 01:11:35/00:02:55, flags: CLT
Incoming interface: FastEthernet0/0, RPF nbr 10.10.10.3
Outgoing interface list:
Loopback0, Forward/Sparse, 01:11:35/00:02:25
(*, 239.0.0.1), 00:00:17/00:02:59, RP 9.9.9.3, flags: SPF
Incoming interface: FastEthernet0/0, RPF nbr 10.10.10.3
Outgoing interface list: Null
(10.0.0.101, 239.0.0.1), 00:00:17/00:02:42, flags: FT
Incoming interface: Loopback0, RPF nbr 0.0.0.0, Registering
Outgoing interface list:
FastEthernet0/0, Forward/Sparse, 00:00:18/00:03:11
(10.10.10.5, 239.0.0.1), 00:00:18/00:02:41, flags: PFT
Incoming interface: FastEthernet0/0, RPF nbr 0.0.0.0
Outgoing interface list: Null
r5#
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