Nokia IPSO 4.0 manual Configuring Virtual IP Support for Vrrp, PIM Support for IP Clustering

For Sparse-Mode PIM, see Protocol-Independent Multicast—Sparse Mode (PIM-SM): Protocol Specification (Revised).

Configuring Virtual IP Support for VRRP

The virtual IP option lets you configure either a PIM sparse-mode or PIM dense-mode interface to advertise the VRRP virtual IP address if the router transitions to become VRRP master after a failover. When you enable virtual IP support for VRRP on a PIM interface, it establishes the neighbor relationship by using the virtual IP if the router is a VRRP master. The master in the VRRP pair sends hello messages that include the virtual IP as the source address and processes PIM control messages from routers that neighbor the VRRP pair. For more information on how to configure this option through Network Voyager, see either “Configuring Dense-Mode PIM” or “Configuring Sparse-Mode PIM.”

Note

You must use monitored-circuit VRRP when configuring virtual IP support for any dynamic routing protocol, including PIM. Do not use VRRPv2 when configuring virtual IP support for any dynamic routing protocol.

PIM Support for IP Clustering

Beginning with IPSO 3.8.1, Nokia supports PIM, both Dense-Mode and Sparse-Mode, in a cluster. Nokia also supports IGMP in a cluster.

IPSO clusters have three modes of operation. To use PIM, either Dense-Mode or Sparse-Mode, in an IP cluster, you must use either multicast mode or multicast mode with IGMP as the cluster mode. Do not use forwarding mode. For more information about IP clustering, see “IP Clustering Description” on page 207

Note

Nokia strongly recommends that you not configure PIM or any other routing protocol on the primary or secondary cluster protocol interfaces of an IP cluster.

PIM Dense-Mode

In the Nokia implementation of PIM Dense-Mode (PIM-DM), all the nodes process PIM control traffic received by the cluster, and only the master processes most of the control traffic sent from the cluster. However, hello messages, for example, are sent by all nodes. Some multicast switches do not forward multicast traffic to interfaces from which they have not received any multicast traffic. To avoid having a multicast switch fail to forward multicast traffic, all cluster nodes send periodic PIM hello messages. All messages from each cluster member have the same source IP address, generation ID, holdtime and designated router priority. Therefore, all neighboring routers view the cluster as a single neighbor even though they receive hello messages from all members of the cluster.

Nokia Network Voyager for IPSO 4.0 Reference Guide 371