Dell PowerSwitch S4820T Configuration Guide for the S4820T System 9.14.1.0 - Page 683
Configuring a Static Rendezvous Point, Overriding Bootstrap Router Updates
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To configure a global expiry time, use the following command. Enable global expiry timer for S, G entries. CONFIGURATION mode ip pim sparse-mode sg-expiry-timer seconds The range is from 211 to 86,400 seconds. The default is 210. NOTE: The global expiry time for all [S, G] entries can vary from 360 to 420 seconds. Configuring a Static Rendezvous Point The rendezvous point (RP) is a PIM-enabled interface on a router that acts as the root a group-specific tree; every group must have an RP. • Identify an RP by the IP address of a PIM-enabled or Loopback interface. ip pim rp-address address group-address group-address mask [override] Overriding Bootstrap Router Updates PIM-SM routers must 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. Use the following command if you have configured a static RP for a group. If you do not use the override option with the following command, the RPs advertised in the BSR updates take precedence over any statically configured RPs. • Use the override option to use statically configured RP instead of the longest prefix match of the configured group address associated with a dynamic RP. ip pim rp-address address {group-address group-address mask} [override] Examples of Viewing the Rendezvous Point (Multicast Group) Information To display the assigned RP for a group, use the show ip pim rp [mapping | group-address] command from EXEC privilege mode. Following is an example of show ip pim rp command output: DellEMC#show ip pim rp Group RP 225.0.1.40 165.87.50.5 226.1.1.1 165.87.50.5 To display the assigned RP for a group range (group-to-RP mapping), use the show ip pim rp mapping command in EXEC privilege mode. Following is an example of show ip pim rp mapping command output: DellEMC#show ip pim rp mapping PIM Group-to-RP Mappings Group(s): 224.0.0.0/4, Static RP: 165.87.50.5, v2 Configuring a Designated Router Multiple PIM-SM routers might be connected to a single local area network (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 IPv4 address of the interface out of which it is sent and a DR priority value. The router PIM Sparse-Mode (PIM-SM) 683
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