3Com 3031 Command Reference Manual page 690

690 C 7: M
HAPTER ULTICAST
display multicast
routing-table static
C C C
OMMON ONFIGURATION OMMANDS
Description
Using the display multicast routing-table command, you can view the information
of IP multicast routing table.
This command displays the multicast routing table information, while the display
multicast forwarding-table command displays the multicast forwarding table
information.
The entry (S, G) in the multicast routing table, i.e., (multicast source, multicast
group) acts as the independent entry in the table. Each entry has an unique
Upstream, indicating the interface through which RPF goes to the multicast
source. Each entry has also a Downstream List, indicating which interfaces need
multicast forwarding. The related information about (S, G) includes:
proto - The multicast protocol number which possesses the (S, G) (in
hexadecimal notation format).
Flags - All kinds of flags, such as RPT 0x1, WC 0x2, SPT 0x4, NEG CACHE 0x8
and JOIN SUPP 0x10. All the flags are marked by binary "bit". In which, RPT
indicates the (S, G) is in the shared tree status. WC is the abbreviation of
wildcard. SPT indicates the shortest path tree. NEG CACHE indicates the cache
record that the downstream interface list is null. JOIN SUPP indicates the prune
suppression status.
Example
Display the corresponding route entry information of multicast group in the
multicast routing table.
<3Com> display multicast routing-table
Multicast Routing Table
Total 1 entry
(10.10.1.2, 225.1.1.1)
UpTime: 00:01:28, Timeout in 278 sec
Upstream interface: Ethernet0/0/0(10.10.1.20)
Downstream interface list:
LoopBack0(20.20.20.30), Protocol 0x1: IGMP
Syntax
display multicast routing-table static [ config ] [ source-address [ mask |
mask-length ] ]
View
Any view
Parameter
config: When this parameter is chosen, all the routing information configured will
be displayed. If this parameter is not chosen, only effective routing information is
displayed.
source-address: IP address of the multicast source.
mask: Mask.