Cisco NM-16ESW - EtherSwitch Switch Bedienungsanleitung PDF herunterladen (Seite 45)

Configuring the Cisco Gigabit EtherSwitch EHWIC

How to Configure Gigabit EtherSwitch EHWICs

Configuring the Cisco Gigabit EtherSwitch EHWIC

OL-23155-01

Verifying the IP Multicast Routing Table

Use the show ip mroute command to verify the IP multicast routing table:

Router#show ip mroute 224.10.103.10

IP Multicast Routing Table

Flags:D - Dense, S - Sparse, B - Bidir Group, s - SSM Group, C - Connected,

L - Local, P - Pruned, R - RP-bit set, F - Register flag,

T - SPT-bit set, J - Join SPT, M - MSDP created entry,

X - Proxy Join Timer Running, A - Candidate for MSDP Advertisement,

U - URD, I - Received Source Specific Host Report, Z - Multicast Tunnel,

Y - Joined MDT-data group, y - Sending to MDT-data group

Outgoing interface flags:H - Hardware switched, A - Assert winner

Timers:Uptime/Expires

Interface state:Interface, Next-Hop or VCD, State/Mode

(*, 224.10.10.10), 00:09:21/00:02:56, RP 0.0.0.0, flags:DC

Incoming interface:Null, RPF nbr 0.0.0.0

Outgoing interface list:

Vlan1, Forward/Sparse-Dense, 00:09:21/00:00:00, H

Router#

Note The RPF-MFD flag indicates that the flow is completely hardware switched. The H flag indicates that

the flow is hardware switched on the outgoing interface.

Configuring IGMP Snooping

This section describes how to configure IGMP snooping on your router and consists of the following

configuration information and procedures:

• Enabling or Disabling IGMP Snooping, page 45

• Enabling IGMP Immediate-Leave Processing, page 47

• Statically Configuring an Interface to Join a Group, page 48

• Configuring a Multicast Router Port, page 49

Enabling or Disabling IGMP Snooping

By default, IGMP snooping is globally enabled on the EtherSwitch EHWIC. When globally enabled or

disabled, it is also enabled or disabled in all existing VLAN interfaces. By default, IGMP snooping is

enabled on all VLANs, but it can be enabled and disabled on a per-VLAN basis.

Global IGMP snooping overrides the per-VLAN IGMP snooping capability. If global snooping is

disabled, you cannot enable VLAN snooping. If global snooping is enabled, you can enable or disable

snooping on a VLAN basis.

Beginning in privileged EXEC mode, follow these steps to globally enable IGMP snooping on the

EtherSwitch EHWIC.

SUMMARY STEPS

1. configure terminal

2. ip igmp snooping

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