Setting the Maximum Number of Entries in Multicast Forwarding Table

You can adjust the number of entries according to the actual networking and service performance to avoid the fault risk resulted from excessive entries.

Prerequisites

Before setting the maximum number of entries in multicast forwarding table, complete the following tasks:

Configuring a unicast routing protocol
Configuring basic multicast functions

Context

Each FW maintains a routing entry for each received multicast packet. Too many entries, however, may exhaust the memory of the FW. In this case, you can define the maximum number of multicast routing entries. Limiting the number of the entries can avoid faults in the FW.

Configurations related to VPN instances are applicable only to the PE device. When configuring the maximum number of entries in the forwarding table for a VPN instance on a PE, perform the configuration in the VPN instance. In other cases, the maximum number of entries in the forwarding table is configured in the public network instance.

Procedure

Public network instance
1. Access the system view.
  system-view
2. Set the maximum number of entries in the multicast forwarding table.
  multicast forwarding-table route-limit limit
VPN instance
1. Access the system view.
  system-view
2. Access the VPN instance view.
  ip vpn-instance vpn-instance-name
3. Enable the IPv4 address family for the VPN instance and access the VPN instance IPv4 address family view.
  ipv4-family
4. Set the maximum number of entries in the multicast forwarding table.
  multicast forwarding-table route-limit limit