Help us improve your experience.

Let us know what you think.

Do you have time for a two-minute survey?

Navigation
Guide That Contains This Content
[+] Expand All
[-] Collapse All

    Monitoring MLD Groups

    Purpose

    Display information about statically joined and directly connected groups learned through MLD.

    Action

    To display statically joined and directly connected groups learned through MLD without OIF mapping:

    host1:boston# show ipv6 mld groups
        Grp Address           Interface         State      Reporter     ExpTim oldHTo
    ------------------- ---------------------- -------- --------------- ------ ------
    ff0e::1             ATM2/0.15              Version2 fe80::90:1a02:1 54     0     
                                                        640:91d                      
    ff0e::4:1           ATM2/0.15              Version2 fe80::90:1a02:1 54     0     
                                                        640:91d                      
      Included Sources:                                                              
        51::1                                                           54           
        51::2                                                           54           
    Counts: 2 version-2, 0 version-1, 0 check state, 0 disabled
           (2 total)
            0 excluded
            Source-groups: 2 included, 0 excluded
    

    To display statically joined and directly connected groups learned through MLD with OIF mapping:

    host1:boston# show ipv6 mld groups
        Grp Address           Interface         State      Reporter     ExpTim oldHTo
    ------------------- ---------------------- -------- --------------- ------ ------
    ff3e::1             ATM5/0.12              Version2 fe80::f7:0:91a: 377    0     
                                                        0                            
                        oif-map OIFMAP ATM5/0.                                       
                        121                                                          
    ff3e::1             ATM5/0.13              Version2 fe80::f7:0:a1a: 369    0     
                                                        0                            
                        oif-map OIFMAP ATM5/0.                                       
                        121                                                          
    ff3e::2             ATM5/0.12              Version2 fe80::f7:0:91a: 370    0     
                                                        0                            
      Included Sources:                                                              
        10::2           oif-map OIFMAP self                             370          
        10::10          oif-map OIFMAP ATM5/0.                          370          
                        120                                                          
        10::11          oif-map OIFMAP ATM5/0.                          370          
                        121                                                          
    ff3e::2             ATM5/0.13              Version2 fe80::f7:0:a1a: 373    0     
                                                        0                            
      Included Sources:                                                              
        10::2           oif-map OIFMAP self                             373          
        10::10          oif-map OIFMAP ATM5/0.                          373          
                        120                                                          
        10::11          oif-map OIFMAP ATM5/0.                          373          
                        121                                                          
     
    Counts: 4 version-2, 0 version-1, 0 check state, 0 disabled
           (4 total)
            0 excluded
            Source-groups: 6 included, 0 excluded
    

    Meaning

    Table 1 lists the show ipv6 mld groups command output fields.

    Table 1: show ipv6 mld groups Output Fields

    Field Name

    Field Description

    Grp Address

    Address of the multicast group

    Interface

    Interface that discovered the multicast group

    oif-map

    Name of the OIF map and the mapped OIF interface, if a group or source has been mapped to an OIF

    State

    MLD version of the group

    Reporter

    Link-local address of the host reporting the multicast group

    ExpTim

    Remaining time, in seconds, at which the router stops polling for more members of this group

    oldHTo

    Remaining time at which the router stops polling for more MLDv1 members of a group. If this value is 0, the interface has received no MLDv1 reports for the group.

    Included Sources

    Sources included in the multicast group

    Excluded Sources

    Sources excluded from the multicast group

    Counts

    Number of source-group mappings by version and state

    Published: 2014-08-19