Platform Considerations; Table 7: Sample Dvmrp (S,G) Pair Table - Juniper JUNOSE 11.0.X MULTICAST ROUTING Configuration Manual

Table 6: Sample Routing Table for a DVMRP Router (continued)
The DVMRP router maintains an (S,G) pair table that provides information to the
multicast forwarding table. The (S,G) pair table is based on:
The (S,G) pair table includes a route from each subnetwork that contains a source to
each multicast group of which that source is a member. These routes can be static
or learned routes. Table 7 on page 127 shows an example of the (S,G) pair table for
DVMRP. A dash (–) in the Input Port column indicates that the interface is associated
with a protocol other than DVMRP.

Table 7: Sample DVMRP (S,G) Pair Table

Platform Considerations

For information about modules that support DVMRP on the ERX7xx models, ERX14xx
models, and the ERX310 Broadband Services Router:
Source
Subnet Subnet Mask
143.3.0.0 255.255.0.0
143.4.0.0 255.255.0.0
Information from the DVMRP routing table
Information learned from prune messages
If IGMP and DVMRP are on the same interface, group information learned from
IGMP
Source Multicast
Subnet Group
143.2.0.0 230.1.2.3
230.2.3.4
230.3.4.5
230.4.5.6
143.3.0.0 230.1.2.3
See ERX Module Guide, Table 1, Module Combinations for detailed module
specifications.
See ERX Module Guide, Appendix A, Module Protocol Support for information about
the modules that support DVMRP.
Time Before
Entry Is Deleted
from Routing
From Router Metric Table
143.2.55.23 2 80
143.78.6.43 3 120
Time Before Entry Is
Deleted from Routing Table
85
75
60
90
80
Chapter 4: Configuring DVMRP
Input Output
Port Port
3/1 4/0, 4/1
3/1 4/0, 4/1
Input Port Output Port
3/0 4/0, 4/1
3/0 4/0, 4/1
3/0 4/1
4/0
3/1 4/0, 4/1

Platform Considerations

127