UMN:CLI
User Manual
V8102
522
vif: multicast interface
no debug nsm mcast
{
all
|
fib-
msg
|
mrt
|
register
|
stats
|
vif
}
Disables the debug event.
To display the debugging of Network Service Module (NSM) in the MRIB, use the follow-
ing command.
Command
Mode
Description
show debugging nsm mcast
Global
Shows the NSM debugging status.
10.3.2
PIM Basic
Protocol Independent Multicast (PIM) is the most widely deployed multicast routing proto-
col. It may use the underlying unicast routing information base, but is not dependent on
any particular unicast routing protocol. PIM has two operation modes, which are called
PIM Sparse Mode (PIM-SM) and PIM Dense Mode (PIM-DM), each optimized for a differ-
ent environment.
PIM-SM is a multicast routing protocol efficient for multicast groups that may span wide-
area (and inter-domain) internets. In the sparse mode, routers forward multicast packets
only when they receives explicit join messages from neighboring routers that have down-
stream group members. PIM-SM uses a unidirectional shared tree per group to deliver
multicast traffic, and optionally uses the shortest path tree per source.
PIM-DM is a multicast routing protocol efficient for multicast groups that are densely pop-
ulated across a network. In the dense mode, routers initially flood multicast datagrams to
all multicast routers, since they assume that all downstream systems want to receive mul-
ticast packets. Prune messages are then used to prevent from propagating to routers with
no group members. Both PIM protocols use the same message formats.
The V8102 currently support PIM-SM only.
PIM Messages
The followings are simple descriptions of PIM control messages:
•
Hello
PIM routers periodically send hello messages on all interfaces to discover neighbor-
ing PIM routers and to determine which router will be the DR for each subnet.
•
Register
Register messages are sent by the DR to the RP when a multicast packet needs to
be transmitted on the RPT. These messages may contain the encapsulated multicast
traffic. Both register and register-stop messages are unicast.
•
Register-stop
When receiving the register-stop message, routers stop sending register messages.
These messages are sent from the RP to the sender of the register messages.
•
Join/prune
Join/prune messages are sent by routers towards upstream sources or RPs. Join
messages are sent to receive the multicast traffic by building shared trees (RPT) or
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Содержание V8102
Страница 1: ...1 V8102 GPON OLT system User Manual...
Страница 158: ...UMN CLI User Manual V8102 158 When you use the no snmp command all configurations of SNMP will be lost...
Страница 427: ...User Manual UMN CLI V8102 427 show debugging dhcp Enable Global Shows the debugging information of DHCP...
Страница 797: ...User Manual UMN CLI V8102 797 show onu gsp status config ONU_ID tag list number TAG_NAME tag name...