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--- cisco:multicasting [2009/12/08 00:14]
a created
+++ cisco:multicasting [2012/10/14 04:39]
188.143.232.12 DGjrMLBF
@@ Line 1: / Line 1: @@
-====== Multicasting ======
+Now we know who the snseilbe one is here. Great post!
-===== PIM Modes =====
-In actuality, PIM refers to a family of very similar routing protocols, but which each operate in a different mode. These are:
-  * *PIM Dense Mode (PIM-DM) (RFC 3973)**
-  * **PIM Sparse Mode (PIM-SM) (RFC 4601)**
-  * **Bidirectional PIM (BIDIR-PIM) (RFC 5015)**
-<code>
-Router# 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,
-   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,
-   Z - Multicast Tunnel, z - MDT-data group sender,
-   Y - Joined MDT-data group, y - Sending to MDT-data group
-Outgoing interface flags: H - Hardware switched, A - Assert winner
- Timers: Uptime/Expires
- Interface state: Interface, Next-Hop or VCD, State/Mode
-(*, 224.0.1.40), 00:07:04/00:02:49, RP 2.2.2.2, flags: SJPL
-  Incoming interface: FastEthernet0/0, RPF nbr 10.0.12.2
-  Outgoing interface list: Null
-</code>
-The first two steps are accomplished with single commands in global configuration on all routers in the multicast domain:
-   R1(config)# ip multicast-routing
-   R1(config)# ip pim rp-address 172.16.34.1
-Note that there exist other means of configuring RP routers, namely Cisco's proprietary Auto-RP and PIMv2's Bootstrap Router (BSR) methods. In our example, only manual configuration is used.
-PIM is enabled per interface:
-   R1(config)# interface f0/0
-   R1(config-if)# ip pim sparse-mode
-Believe it or not, this is all the configuration necessary to get a bare bones multicast network up and running. After enabling PIM, routers will form adjacencies with other PIM routers and multicast routes will be exchanged:
-<code>
-R1# show ip pim neighbor
-PIM Neighbor Table
-Mode: B - Bidir Capable, DR - Designated Router, N - Default DR Priority,
-  S - State Refresh Capable
-Neighbor          Interface                Uptime/Expires    Ver   DR
-Address                                                            Prio/Mode
-.0.12.2         FastEthernet0/0          00:06:39/00:01:30 v2    1 / DR S
-.0.14.4         FastEthernet0/1          00:06:40/00:01:30 v2    1 / DR S
-</code>