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show mld interface

Syntax

show mld interface <brief | detail><interface-name><logical-system (all | logical-system-name)>

Release Information

Command introduced before Junos OS Release 7.4.

Description

Display information about Multicast Listener Discovery (MLD)-enabled interfaces.

Options

none
—

Display standard information about all MLD-enabled interfaces.

brief | detail
—

(Optional) Display the specified level of output.

interface-name
—

(Optional) Display information about the specified interface.

logical-system (all | logical-system-name)
—

(Optional) Perform this operation on all logical systems or on a particular logical system.

Required Privilege Level

view

 

Related Documentation

 

List of Sample Output

show mld interface
show mld interface brief
show mld interface detail
show mld interface <interface-name>

Output Fields

Table 1 describes the output fields for the show mld interface command. Output fields are listed in the approximate order in which they appear.

Table 1: show mld interface Output Fields

Field Name

Field Description

Level of Output

Interface

Name of the interface.

All levels

Querier

Address of the router that has been elected to send membership queries.

All levels

State

State of the interface: Up or Down.

All levels

SSM Map Policy

Name of the source-specific multicast (SSM) map policy that has been applied to the interface.

All levels

SSM Map Policy

Name of the source-specific multicast (SSM) map policy at the MLD interface.

All levels

Timeout

How long until the MLD querier is declared to be unreachable, in seconds.

All levels

Version

MLD version being used on the interface: 1 or 2.

All levels

Groups

Number of groups on the interface.

All levels

Passive

State of the passive mode option:

  • On—Indicates that the router can run IGMP or MLD on the interface but not send or receive control traffic such as IGMP or MLD reports, queries, and leaves.
  • Off—Indicates that the router can run IGMP or MLD on the interface and send or receive control traffic such as IGMP or MLD reports, queries, and leaves.

The passive statement enables you to selectively activate up to two out of a possible three available query or control traffic options. When enabled, the following options appear after the on state declaration:

  • send-general-query—The interface sends general queries.
  • send-group-query—The interface sends group-specific and group-source-specific queries.
  • allow-receive—The interface receives control traffic

All levels

OIF map

Name of the OIF map associated to the interface.

All levels

SSM map

Name of the source-specific multicast (SSM) map used on the interface, if configured.

All levels

Group limit

Maximum number of groups allowed on the interface. Any memberships requested after the limit is reached are rejected.

All levels

Group threshold

Configured threshold at which a warning message is generated.

This threshold is based on a percentage of groups received on the interface. If the number of groups received reaches the configured threshold, the device generates a warning message.

All levels

Group log-interval

Time (in seconds) between consecutive log messages.

All levels

Immediate Leave

State of the immediate leave option:

  • On—Indicates that the router removes a host from the multicast group as soon as the router receives a multicast listener done message from a host associated with the interface.
  • Off—Indicates that after receiving a multicast listener done message, instead of removing a host from the multicast group immediately, the router sends a group query to determine if another receiver responds.

All levels

Configured Parameters

Information configured by the user.

  • MLD Query Interval (.1 secs)—Interval at which this router sends membership queries when it is the querier.
  • MLD Query Response Interval (.1 secs)—Time that the router waits for a report in response to a general query.
  • MLD Last Member Query Interval (.1 secs)—Time that the router waits for a report in response to a group-specific query.
  • MLD Robustness Count—Number of times the router retries a query.

All levels

Derived Parameters

Derived information.

  • MLD Membership Timeout (.1 secs)—Timeout period for group membership. If no report is received for these groups before the timeout expires, the group membership will be removed.
  • MLD Other Querier Present Timeout (.1 secs)—Time that the router waits for the IGMP querier to send a query.

All levels

Sample Output

show mld interface

user@host> show mld interface 
Interface: fe-0/0/0
    Querier: None
    State: Up         Timeout:       0    Version:  1    Groups:      0
    SSM Map Policy: ssm-policy-A
Interface: at-0/3/1.0
    Querier:  8038::c0a8:c345
    State: Up         Timeout:    None    Version:  1    Groups:      0
    SSM Map Policy: ssm-policy-B
Interface: fe-1/0/1.0
    Querier:  ::192.168.195.73
    State: Up         Timeout:    None    Version:  1    Groups:      3
    SSM Map Policy: ssm-policy-C
    SSM map: ipv6map1
Immediate Leave: On

Configured Parameters:
MLD Query Interval (.1 secs): 1250
MLD Query Response Interval (.1 secs): 100
MLD Last Member Query Interval (.1 secs): 10
MLD Robustness Count: 2

Derived Parameters:
MLD Membership Timeout (.1secs): 2600
MLD Other Querier Present Timeout (.1 secs): 2550

show mld interface brief

The output for the show mld interface brief command is identical to that for the show mld interface command. For sample output, see show mld interface.

show mld interface detail

The output for the show mld interface detail command is identical to that for the show mld interface command. For sample output, see show mld interface.

show mld interface <interface-name>

user@host# show mld interface ge-3/2/0.0
Interface: ge-3/2/0.0
  Querier: 20.1.1.1 
  State: Up Timeout:    None Version:  3 Groups:      1 
  Group limit: 8   
  Group threshold: 60
  Group log-interval: 10   
  Immediate leave:  Off 
  Promiscuous mode:  Off

Published: 2013-03-14

Supported Platforms

 

Related Documentation

 

Published: 2013-03-14

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