Cisco PIX 525 Spezifikationen PDF herunterladen (Seite 103)

100

101

8-21

Cisco Security Appliance Command Line Configuration Guide

OL-6721-01

Chapter 8 Configuring IP Routing and DHCP Services

Configuring Multicast Routing

Changing the Query Response Time

By default, the maximum query response time advertised in IGMP queries is 10 seconds. If the security

appliance does not receive a response to a host query within this amount of time, it deletes the group.

To change the maximum query response time, enter the following command:

hostname(config-if)# igmp query-max-response-time

seconds

Changing the IGMP Version

By default, the security appliance runs IGMP Version 2, which enables several additional features such

as the igmp query-timeout and igmp query-interval commands.

All multicast routers on a subnet must support the same version of IGMP. The security appliance does

not automatically detect version 1 routers and switch to version 1. However, a mix of IGMP Version 1

and 2 hosts on the subnet works; the security appliance running IGMP Version 2 works correctly when

IGMP Version 1 hosts are present.

To control which version of IGMP is running on an interface, enter the following command:

hostname(config-if)# igmp version {1 | 2}

Configuring Stub Multicast Routing

A security appliance acting as the gateway to the stub area does not need to participate in PIM. Instead,

you can configure it to act as an IGMP proxy agent and forward IGMP messages from hosts connected

on one interface to an upstream multicast router on another. To configure the security appliance as an

IGMP proxy agent, forward the host join and leave messages from the stub area interface to an upstream

interface.

To forward the host join and leave messages, enter the following command from the interface attached

to the stub area:

hostname(config-if)# igmp forward interface

if_name

Note Stub Multicast Routing and PIM are not supported concurrently.

Configuring a Static Multicast Route

When using PIM, the security appliance expects to receive packets on the same interface where it sends

unicast packets back to the source. In some cases, such as bypassing a route that does not support

multicast routing, you may want unicast packets to take one path and multicast packets to take another.

Static multicast routes are not advertised or redistributed.

To configure a static multicast route for PIM, enter the following command:

hostname(config)# mroute

src_ip src_mask

input_if_name

[

distance

]

To configure a static multicast route for a stub area, enter the following command:

hostname(config)# mroute

src_ip src_mask

input_if_name

[dense

output_if_name

] [

distance

]

1 2 ... 98 99 100 101 102 103 104 105 106 107 108 ... 603 604

Kommentare zu diesen Handbüchern

Keine Kommentare

Cisco PIX 525 Spezifikationen Seite 103

Kommentare zu diesen Handbüchern