Additional Sparse Mode Settings; Specifying The Rendezvous Point; Influencing The Designated Router Selection - Lenovo Flex System Fabric CN4093 Application Manual

Additional Sparse Mode Settings

Specifying the Rendezvous Point

1. Select the PIM component that will represent the RP candidate:
2. Configure the IPv4 address of the switch interface which will be advertised as a
3. If using dynamic RP candidates, configure the amount of time that the elected

Influencing the Designated Router Selection

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CN4093 Application Guide for N/OS 8.4
Using PIM‐SM, at least one PIM‐capable router must be a candidate for use as a
Rendezvous Point (RP) for any given multicast group. If desired, the CN4093 can
act as an RP candidate. To assign a configured switch IP interface as a candidate,
use the following procedure.
CN 4093(config)# ip pim component <1‐2>
candidate RP for the specified multicast group:
CN 4093(config-ip-pim-comp)# rp-candidate rp-address <group address>
<group address mask> <candidate IPv4 address>
The switch interface will participate in the election of the RP that occurs on the
Bootstrap Router, or BSR (see "Specifying a Bootstrap Router" on page
Alternately, if no election is desired, the switch can provide a static RP, specified
using the following command:
CN 4093(config-ip-pim-comp)# rp-static rp-address <group address>
<group address mask> <static RP IPv4 address>
interface will remain the RP for the group before a re‐election is performed:
CN 4093(config-ip-pim-comp)# rp-candidate holdtime <0‐255>
CN 4093(config-ip-pim-comp)# exit
Using PIM‐SM, All PIM‐enabled IP interfaces are considered as potential
Designate Routers (DR) for their domain. By default, the interface with the highest
IP address on the domain is selected. However, if an interface is configured with a
DR priority value, it overrides the IP address selection process. If more than one
interface on a domain is configured with a DR priority, the one with the highest
number is selected.
Use the following commands to configure the DR priority value (Interface IP
mode):
CN 4093(config)# interface ip <Interface number>
CN 4093(config-ip-if)# ip pim dr-priority <value (0‐4294967294)>
CN 4093(config-ip-if)# exit
Note: A value of 0 (zero) specifies that the CN4093 will not act as the DR. This
setting requires the CN4093 to be connected to a peer that has a DR priority setting
of 1 or higher in order to ensure that a DR will be present in the network.
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