3Com Router 3031, Command Reference Manual

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724 C
HAPTER
7: M
ULTICAST
C
OMMON
C
ONFIGURATION
C
OMMANDS
Parameter
traffic-rate: Switch rate threshold from the RPT to the SPT in Kbps, ranging from 0
to 65535. By default, the switch threshold value is 0, i.e., switching starts when
the RPT receives the first data packet.
infinity: Indicates never to switch to SPT.
acl-number: Number of basic IP ACL, defining the range of a multicast group. The
value ranges from 1 to 99.
Description
Using the spt-switch-threshold command, you can set the packet rate threshold
when the PIM leaf router switches from the RPT to the SPT. Using the undo
spt-switch-threshold command, you can restore the default setting.
Example
Set the threshold value to 4Kbps. If the transmission rate from the source to the
multicast group is higher than it, the router will switch to the SPT toward the
source.
<3Com> system-view
<3Com] multicast routing-enable
<3Com] pim
<3Com-pim] spt-switch-threshold 4
static-rp Syntax
static-rp rp-address [ acl-number ]
undo static-rp
View
PIM view
Parameter
rp-address: Static RP address. This address must be valid unicast IP address and
cannot be configured as the address in 127 network segment.
acl-number: Number of basic ACL, used in controlling the multicast group range
that static RP serves. The value ranges from 1 to 99.
Description
Using the static-rp command, you can configure static RP. Using the undo static-rp
command, you can remove the configuration.
RP is the kernel router in multicast routing. If the dynamic RP elected through BSR
mechanism is invalid for some reason, static RP can be configured as backup of
the dynamic RP to improve robusticity of the network and operation management
capability of the multicast network.
All routers in the PIM domain should be configured with this command and be
specified with the same RP address. If the configured static RP address is the