Mvr (Interface Configuration) - Cisco Catalyst 3550 Command Reference Manual
Multilayer switch
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Chapter 2
Catalyst 3550 Switch Cisco IOS Commands
Receiver ports cannot be trunk ports. Receiver ports on a switch can be in different VLANs, but should
not belong to the multicast VLAN.
A port that is not taking part in MVR should not be configured as an MVR receiver port or a source port.
A non-MVR port is a normal switch port, able to send and receive multicast data with normal switch
behavior.
When Immediate Leave is enabled, a receiver port leaves a multicast group more quickly. Without
Immediate Leave, when the switch receives an IGMP leave message from a group on a receiver port, it
sends out an IGMP MAC-based query on that port and waits for IGMP group membership reports. If no
reports are received in a configured time period, the receiver port is removed from multicast group
membership. With Immediate Leave, an IGMP MAC-based query is not sent from the receiver port on
which the IGMP leave was received. As soon as the leave message is received, the receiver port is
removed from multicast group membership, which speeds up leave latency.
The Immediate Leave feature should be enabled only on receiver ports to which a single receiver device
is connected.
The mvr vlan group command statically configures ports to receive multicast traffic sent to the IP
multicast address. A port statically configured as a member of group remains a member of the group
until statically removed. In compatible mode, this command applies only to receiver ports; in dynamic
mode, it can also apply to source ports. Receiver ports can also dynamically join multicast groups by
using IGMP join messages.
When operating in compatible mode, MVR does not support IGMP dynamic joins on MVR source ports.
Examples
This example shows how to configure a port as an MVR receiver port:
Switch(config)# interface gigabitethernet0/1
Switch(config-if)# mvr type receiver
This example shows how to configure a port as an MVR source port:
Switch(config)# interface gigabitethernet0/2
Switch(config-if)# mvr type source
This example shows how to remove a port as an MVR port:
Switch(config)# interface gigabitethernet0/1
Switch(config-if))# no mvr
This example shows how to display configured receiver ports and source ports.
Switch# show mvr interface
Port
----
Gi0/1
Gi0/2
Gi0/5
This example shows how to enable immediate leave on a port:
Switch(config)# interface gigabitethernet0/1
Switch(config-if)# mvr immediate
This example shows how to disable immediate leave on a port:
Switch(config)# interface gigabitethernet0/1
Switch(config-if)# no mvr immediate
OL-8566-02
Type
Status
----
-------
SOURCE
ACTIVE/UP
RECEIVER
ACTIVE/DOWN
RECEIVER
ACTIVE/UP
Immediate Leave
---------------
DISABLED
DISABLED
ENABLED
Catalyst 3550 Multilayer Switch Command Reference
mvr (interface configuration)
2-269
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