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Non-Configurable Data
Interface - This parameter shows the interface on which multicast packets are forwarded.
o
Group Compatibility Mode - This parameter shows group compatibility mode (v1, v2 and v3) for this group on the
o
specified interface.
Source Filter Mode - The source filter mode (Include/Exclude/NA) for the specified group on this interface.
o
Source Hosts - This parameter shows source addresses which are members of this multicast address.
o
Expiry Time - This parameter shows expiry time interval against each source address which are members of this
o
multicast group. This is the amount of time after which the specified source entry is aged out.
4.7.3 DVMRP
Distance Vector Multicast Routing Protocol is used to route multicast traffic to nodes which have requested a specific
multicast service via IGMP. To configure DVMRP, you must specify the routing metric, probe interval, and neighbor router
timeout.
DVMRP Overview -
Base on Distance Vector
Similar to RIP
。
Infinity = 32 hops
。
DVMRP uses the IGMP to exchange routing datagram
IP Protocol 0x02 (IGMP)
。
IGMP type 0x13 (DVMRP)
。
Similar to PIM DM
Broadcast and Prune operation
。
Uses DVMRP route table for RPF check
。
Route Table
Build source distribution trees
。
Perform multicast forwarding (RPF checks)
。
Periodic route updates (every 60 Seconds)
。
Concept of Virtual interfaces
Physical: Ethernet, FDDI, Token Ring
。
Tunnels: IP-in-IP tunnels
。
Version Compatibility
V1, V2 : No support Pruning and Generation ID
。
V3.0, v3.1, v3.2 : Have support Pruning but no support Generation ID
。
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