Override Bootstrap Router Updates; Configure A Designated Router - Dell Force10 S4810P Configuration Manual

Override Bootstrap Router Updates

PIM-SM routers need to know the address of the RP for each group for which they have (*,G) entry. This
address is obtained automatically through the bootstrap router (BSR) mechanism or a static RP
configuration.
If you have configured a static RP for a group, use the option
override bootstrap router updates with your static RP configuration. If you do not use this option, the RPs
advertised in the BSR updates take precedence over any statically configured RPs.
Display the assigned RP for a group using the command
shown in Figure
Figure 35-6. Displaying the Rendezvous Point for a Multicast Group
FTOS#show ip pim rp
Group
225.0.1.40
226.1.1.1
Display the assigned RP for a group range (group-to-RP mapping) using the command
command in EXEC privilege mode
mapping
Figure 35-7. Display the Rendezvous Point for a Multicast Group Range
FTOS#show ip pim rp mapping
PIM Group-to-RP Mappings
Group(s): 224.0.0.0/4, Static
RP: 165.87.50.5, v2

Configure a Designated Router

Multiple PIM-SM routers might be connected to a single LAN segment. One of these routers is elected to
act on behalf of directly connected hosts. This router is the Designated Router (DR).
The DR is elected using hello messages. Each PIM router learns about its neighbors by periodically
sending a hello message out of each PIM-enabled interface. Hello messages contain the IP address of the
interface out of which it is sent and a DR priority value. The router with the greatest priority value is the
DR. If the priority value is the same for two routers, then the router with the greatest IP address is the DR.
By default the DR priority value is 192, so the IP address determines the DR.
• Assign a DR priority value using the command
• Change the interval at which a router sends hello messages using the command
from INTERFACE mode.
seconds
• Display the current value of these parameter using the command
mode.
35-6.
RP
165.87.50.5
165.87.50.5
with the command
override
from EXEC privilege mode, as
show ip pim rp
ip pim dr-priority priority-value
show ip pim interface
ip pim rp-address
show ip pim rp
from INTERFACE mode.
ip pim query-interval
EXEC Privilege
PIM Sparse-Mode (PIM-SM) | 783
to