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cisco:multicasting [2012/10/14 04:39] 188.143.232.12 DGjrMLBF |
cisco:multicasting [2012/10/15 11:55] (current) zagi old revision restored |
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- | Now we know who the snseilbe one is here. Great post! | + | ====== Multicasting ====== |
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+ | ===== PIM Modes ===== | ||
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+ | In actuality, PIM refers to a family of very similar routing protocols, but which each operate in a different mode. These are: | ||
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+ | * **PIM Dense Mode (PIM-DM) (RFC 3973)** | ||
+ | * **PIM Sparse Mode (PIM-SM) (RFC 4601)** | ||
+ | * **Bidirectional PIM (BIDIR-PIM) (RFC 5015)** | ||
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+ | < | ||
+ | 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 | ||
+ | | ||
+ | | ||
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+ | (*, 224.0.1.40), | ||
+ | Incoming interface: FastEthernet0/ | ||
+ | Outgoing interface list: Null | ||
+ | </ | ||
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+ | The first two steps are accomplished with single commands in global configuration on all routers in the multicast domain: | ||
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+ | | ||
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+ | Note that there exist other means of configuring RP routers, namely Cisco' | ||
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+ | PIM is enabled per interface: | ||
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+ | 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: | ||
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+ | < | ||
+ | R1# show ip pim neighbor | ||
+ | PIM Neighbor Table | ||
+ | Mode: B - Bidir Capable, DR - Designated Router, N - Default DR Priority, | ||
+ | S - State Refresh Capable | ||
+ | Neighbor | ||
+ | Address | ||
+ | 10.0.12.2 | ||
+ | 10.0.14.4 | ||
+ | </ | ||
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+ |