Today we are going
to discuss about the PIM Sparse-mode.
Note all the router
preconfigured with the ipv4 address and OSPF is used as the routing protocol,
all routers are in area 0. PIM sparse dense mode it running.
IP ADDRESS: Fast
Ethernet 155.1.XY.X/24
Loopback X.X.X.X/32
Where X & Y is
the router host number.(X <Y)
To enable the PIM
Sparse mode we need to enable IP PIM SPARSE DEFAULT. This will enable the pim
sparse mode for the group 232.0.0.0/8.
Lets this time we
will do in reverse we will configure R5 the receiver first.
R5(config-if)#int
lo0
R5(config-if)#ip
igmp join-group 232.1.1.1 source 1.1.1.1
But R5 is sending
the IGMPv2. Note for PIM SPARSE MODE we need to enable the PIM SPARSE MODE.
R5(config-if)#ip
igmp version 3
We have to enable
the igmp version 3 on the last hop router.
R4(config-if)#ip
igmp version 3
IN SSM we don’t
need the RP as receiver itself telling form which receiver it should receive the feed.
Note: We can also manually define the Group
Lets enable the
source
R1#ping
Protocol [ip]:
Target IP address:
232.1.1.1
Repeat count [1]:
100000000
Datagram size
[100]:
Timeout in seconds
[2]:
Extended commands
[n]: y
Interface [All]:
loopback0
Time to live [255]:
Source address:
1.1.1.1
Type of service
[0]:
Set DF bit in IP
header? [no]:
Validate reply
data? [no]:
Data pattern
[0xABCD]:
Loose, Strict,
Record, Timestamp, Verbose[none]:
Sweep range of
sizes [n]:
Type escape
sequence to abort.
Sending 100000000,
100-byte ICMP Echos to 224.5.5.5, timeout is 2 seconds:
Packet sent with a
source address of 1.1.1.1
.............................................
Lets enable the BSR
to lets populate the RP details. This we have done just to update the RP and
check the state information.
R2(config)#ip pim
bsr-candidate lo0
R3 will be acting
as the candidate RP.
R3(config)#ip pim
rp-candidate loopback 0
SSM uses the shared
path tree(S,G) throughout the Path
R4#smr 232.1.1.1 |
be Int
Interface state: Interface, Next-Hop or VCD,
State/Mode
(*, 232.1.1.1),
00:00:41/stopped, RP 3.3.3.3, flags: SP
Incoming interface: FastEthernet1/0, RPF nbr
155.1.34.3
Outgoing interface list: Null
(1.1.1.1,
232.1.1.1), 00:00:05/00:03:26, flags: T
Incoming interface: FastEthernet0/0, RPF nbr
155.1.24.2
Outgoing interface list:
FastEthernet2/0, Forward/Sparse,
00:00:05/00:03:25
R2#smr 232.1.1.1 |
be Int
Interface state: Interface, Next-Hop or VCD,
State/Mode
(*, 232.1.1.1),
00:20:43/stopped, RP 3.3.3.3, flags: SP
Incoming interface: FastEthernet1/0, RPF nbr
155.1.23.3
Outgoing interface list: Null
(1.1.1.1,
232.1.1.1), 00:20:43/00:03:21, flags: T
Incoming interface: FastEthernet0/0, RPF nbr
155.1.12.1
Outgoing interface list:
FastEthernet2/0, Forward/Sparse,
00:20:43/00:03:29
R3#smr 232.1.1.1 |
be Int
Interface state: Interface, Next-Hop or VCD,
State/Mode
(*, 232.1.1.1),
00:16:04/00:03:21, RP 3.3.3.3, flags: S
Incoming interface: Null, RPF nbr 0.0.0.0
Outgoing interface list:
FastEthernet1/0, Forward/Sparse,
00:10:48/00:03:21
(1.1.1.1,
232.1.1.1), 00:16:04/00:02:50, flags: PT
Incoming interface: FastEthernet0/0, RPF nbr
155.1.23.2
Outgoing interface list: Null
R5----------R4-(S,G)---------R2-(S,G)------------R1.
SSM works with both
the SSM Group and also non SSM group at the same time.
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