ProCurve 8200zl Uživatelská příručka stáhnout pdf (Strana 105)

PIM-SM (Sparse Mode)

Feature Overview

and group members are sparsely distributed over a wide area can result in

unnecessary multicast traffic on routers outside the distribution paths needed

for traffic between a given multicast source and the hosts belonging to the

multicast group. In such networks, PIM-SM can be used to reduce the effect

of multicast traffic flows in network areas where they are not needed. And

because PIM-SM does not automatically flood traffic, it is a logical choice in

lower bandwidth situations.

Feature Overview

PIM-SM on the routers covered by this manual includes:

■ Routing Protocol Support: PIM uses whichever IP unicast routing

protocol is running on the router. These can include:

• RIP

• OSPF

• static routes

• directly connected interfaces

■ VLAN Interface Support: Up to 511 outbound VLANs (and 1 inbound

VLAN) are supported in the multicast routing table (MRT) at any given

time. This means the sum of all outbound VLANs across all current flows

on a router may not exceed 511. (A single flow may span one inbound

VLAN and up to 511 outbound VLANs, depending on the VLAN member-

ships of the hosts actively belonging to the flow.)

■ Flow Capacity: Up to 2048 flows are supported in hardware across a

maximum of 512 VLANs. (A flow is composed of an IP source address and

an IP multicast group address, regardless of the number of active hosts

belonging to the multicast group at any given time.)

■ Multicast Group to Rendezvous Point (RP) Mapping: PIM-SM uses

the Bootstrap Router (BSR) protocol to automatically resolve multicast

group addresses to Candidate-RP routers. In the current software release,

a router administers BSR operation on a PIM-SM domain basis. (BSR

zones and PIM border router operation are not currently supported by the

software covered in this guide.) Note that BSR operation does not extend

to statically configured RPs. (For more on this topic, refer to “Static

Rendezvous Point (Static-RP)” on page 4-17.)

4-5

1 2 ... 100 101 102 103 104 105 106 107 108 109 110 ... 359 360

Žádné komentáře

ProCurve 8200zl Uživatelská příručka Strana 105